ORCID Profile
0000-0002-3028-0459
Current Organisation
Griffith University
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Research Topics
In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Top 5 Research Topics
ANZSRC Field of Research (FoR)
Functional Materials | Materials Engineering | Nanomaterials | Chemical Engineering | Nanotechnology | Electrochemistry | Catalytic Process Engineering | Electrochemistry | Chemical Characterisation of Materials | Catalysis and Mechanisms of Reactions | Macromolecular and Materials Chemistry | Nanoscale Characterisation | Nanofabrication, Growth and Self Assembly | Wastewater Treatment Processes | Chemistry Of Catalysis | Sensor Technology (Chemical aspects) | Carbon Capture Engineering (excl. Sequestration) | Ceramics | Chemical Sciences not elsewhere classified | Process Control and Simulation | Characterisation Of Macromolecules | Polymers | Composite Materials | Materials Engineering not elsewhere classified | Physical Chemistry Not Elsewhere Classified | Compound Semiconductors | Metals and Alloy Materials | Ceramics | Composite and Hybrid Materials | Analytical Chemistry | Biomaterials | Electroanalytical Chemistry | Physical Chemistry (Incl. Structural) | Analytical Chemistry not elsewhere classified | Computational Heat Transfer | Analytical Chemistry Not Elsewhere Classified | Membrane And Separation Technologies | Materials Engineering Not Elsewhere Classified | Technology not elsewhere classified | Surfaces and Structural Properties of Condensed Matter | Environmental Nanotechnology | Condensed Matter Characterisation Technique Development |
ANZSRC Socio-Economic Objective (SEO)
Expanding Knowledge in Technology | Hydrogen Production from Renewable Energy | Expanding Knowledge in Engineering | Expanding Knowledge in the Chemical Sciences | Land and water management | Physical and Chemical Conditions of Water for Urban and Industrial Use | Solar-Photovoltaic Energy | Environmental health | Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation) | Solar-photoelectric | Inorganic Industrial Chemicals | Ceramics, glass and industrial mineral products not elsewhere classified | Environmentally Sustainable Energy Activities not elsewhere classified | Recycling | Structural Glass and Glass Products | Structural Metal Products | Waste management | Climate Change Mitigation Strategies | Public Health (excl. Specific Population Health) not elsewhere classified | Scientific instrumentation | Biofuel (Biomass) Energy | Urban and Industrial Water Management | Solar-Thermal Energy | Residential Energy Conservation and Efficiency | Energy Conservation and Efficiency in Transport | Energy not elsewhere classified | Polymeric materials (e.g. paints) | Expanding Knowledge in the Physical Sciences | Scientific Instruments | Environmental Health | Environmentally Sustainable Transport not elsewhere classified
Related Links
Publications
Operando Converting BiOCl into Bi2O2(CO3)xCly for Efficient Electrocatalytic Reduction of Carbon Dioxide to Formate
Publisher: Springer Science and Business Media LLC
Date: 03-05-2022
DOI: 10.1007/S40820-022-00862-0
Abstract: Bismuth-based materials (e.g., metallic, oxides and subcarbonate) are emerged as promising electrocatalysts for converting CO 2 to formate. However, Bi o -based electrocatalysts possess high overpotentials, while bismuth oxides and subcarbonate encounter stability issues. This work is designated to exemplify that the operando synthesis can be an effective means to enhance the stability of electrocatalysts under operando CO 2 RR conditions. A synthetic approach is developed to electrochemically convert BiOCl into Cl-containing subcarbonate (Bi 2 O 2 (CO 3 ) x Cl y ) under operando CO 2 RR conditions. The systematic operando spectroscopic studies depict that BiOCl is converted to Bi 2 O 2 (CO 3 ) x Cl y via a cathodic potential-promoted anion-exchange process. The operando synthesized Bi 2 O 2 (CO 3 ) x Cl y can tolerate − 1.0 V versus RHE, while for the wet-chemistry synthesized pure Bi 2 O 2 CO 3 , the formation of metallic Bi o occurs at − 0.6 V versus RHE. At − 0.8 V versus RHE, Bi 2 O 2 (CO 3 ) x Cl y can readily attain a FE HCOO - of 97.9%, much higher than that of the pure Bi 2 O 2 CO 3 (81.3%). DFT calculations indicate that differing from the pure Bi 2 O 2 CO 3 -catalyzed CO 2 RR, where formate is formed via a * OCHO intermediate step that requires a high energy input energy of 2.69 eV to proceed, the formation of HCOO − over Bi 2 O 2 (CO 3 ) x Cl y has proceeded via a * COOH intermediate step that only requires low energy input of 2.56 eV.
Soil and foliar nutrient and nitrogen isotope composition (δ15N) at 5 years after poultry litter and green waste biochar amendment in a macadamia orchard
Publisher: Springer Science and Business Media LLC
Date: 10-2014
DOI: 10.1007/S11356-014-3649-2
Abstract: This study aimed to evaluate the improvement in soil fertility and plant nutrient use in a macadamia orchard following biochar application. The main objectives of this study were to assess the effects of poultry litter and green waste biochar applications on nitrogen (N) cycling using N isotope composition (δ(15)N) and nutrient availability in a soil-plant system at a macadamia orchard, 5 years following application. Biochar was applied at 10 t ha(-1) dry weight but concentrated within a 3-m diameter zone when trees were planted in 2007. Soil and leaf s les were collected in 2012, and both soil and foliar N isotope composition (δ(15)N) and nutrient concentrations were assessed. Both soil and foliar δ(15)N increased significantly in the poultry litter biochar plots compared to the green waste biochar and control plots. A significant relationship was observed between soil and plant δ(15)N. There was no influence of either biochars on foliar total N concentrations or soil NH4 (+)-N and NO3 (-)-N, which suggested that biochar application did not pose any restriction for plant N uptake. Plant bioavailable phosphorus (P) was significantly higher in the poultry litter biochar treatment compared to the green waste biochar treatment and control. We hypothesised that the bioavailability of N and P content of poultry litter biochar may play an important role in increasing soil and plant δ(15)N and P concentrations. Biochar application affected soil-plant N cycling and there is potential to use soil and plant δ(15)N to investigate N cycling in a soil-biochar-tree crop system. The poultry litter biochar significantly increased soil fertility compared to the green waste biochar at 5 years following biochar application which makes the poultry litter a better feedstock to produce biochar compared to green waste for the tree crops.
Microbial community structure mediates response of soil C decomposition to litter addition and warming
Publisher: Elsevier BV
Date: 2015
Nitrogen-free commercial carbon cloth with rich defects for electrocatalytic ammonia synthesis under ambient conditions
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC06000B
Abstract: The formation of rich defects in commercial carbon cloth after thermal treatment in air results in significantly enhanced electrocatalytic activity toward the N 2 reduction reaction to synthesize NH 3 .
Modelling neuroanatomical variation during childhood and adolescence with neighbourhood-preserving embedding
Publisher: Springer Science and Business Media LLC
Date: 19-12-2017
DOI: 10.1038/S41598-017-18253-6
Abstract: Brain development is a dynamic process with tissue-specific alterations that reflect complex and ongoing biological processes taking place during childhood and adolescence. Accurate identification and modelling of these anatomical processes in vivo with MRI may provide clinically useful imaging markers of in idual variability in development. In this study, we use manifold learning to build a model of age- and sex-related anatomical variation using multiple magnetic resonance imaging metrics. Using publicly available data from a large paediatric cohort (n = 768), we apply a multi-metric machine learning approach combining measures of tissue volume, cortical area and cortical thickness into a low-dimensional data representation. We find that neuroanatomical variation due to age and sex can be captured by two orthogonal patterns of brain development and we use this model to simultaneously predict age with a mean error of 1.5–1.6 years and sex with an accuracy of 81%. We validate this model in an independent developmental cohort. We present a framework for modelling anatomical development during childhood using manifold embedding. This model accurately predicts age and sex based on image-derived markers of cerebral morphology and generalises well to independent populations.
Network analysis reveals that bacteria and fungi form modules that correlate independently with soil parameters
Publisher: Wiley
Date: 06-08-2014
Abstract: Network and multivariate statistical analyses were performed to determine interactions between bacterial and fungal community terminal restriction length polymorphisms as well as soil properties in paired woodland and pasture sites. Canonical correspondence analysis (CCA) revealed that shifts in woodland community composition correlated with soil dissolved organic carbon, while changes in pasture community composition correlated with moisture, nitrogen and phosphorus. Weighted correlation network analysis detected two distinct microbial modules per land use. Bacterial and fungal ribotypes did not group separately, rather all modules comprised of both bacterial and fungal ribotypes. Woodland modules had a similar fungal : bacterial ribotype ratio, while in the pasture, one module was fungal dominated. There was no correspondence between pasture and woodland modules in their ribotype composition. The modules had different relationships to soil variables, and these contrasts were not detected without the use of network analysis. This study demonstrated that fungi and bacteria, components of the soil microbial communities usually treated as separate functional groups as in a CCA approach, were co-correlated and formed distinct associations in these adjacent habitats. Understanding these distinct modular associations may shed more light on their niche space in the soil environment, and allow a more realistic description of soil microbial ecology and function.
Electrocatalytically Active Fe‐(O‐C2)4 Single‐Atom Site for Efficient Reduction of Nitrogen to Ammonia
Publisher: Wiley
Date: 27-05-2020
Enhancement of zinc vacancies in room-temperature ferromagnetic Cr–Mn codoped ZnO nanorods synthesized by hydrothermal method under high pulsed magnetic field
Publisher: Elsevier BV
Date: 10-2015
Titanium dioxide-based DGT technique for in situ measurement of dissolved reactive phosphorus in fresh and marine waters
Publisher: American Chemical Society (ACS)
Date: 23-11-2010
DOI: 10.1021/ES1027713
Abstract: A new diffusive gradients in a thin film (DGT) technique for measuring dissolved reactive phosphorus (DRP) in fresh and marine waters is reported. The new method, which uses a commercially available titanium dioxide based adsorbent (Metsorb), was evaluated and compared to the well-established ferrihydrite-DGT method (ferrihydrite cast within the polyacrylamide gel). DGT time-series experiments showed that the mass of DRP accumulated by Metsorb and ferrihydrite was linear with time when deployed in simple solutions. Both DGT methods showed predictable uptake across the pH (4.0-8.3) and ionic strength (0.0001-1 mol L(-1) NaNO(3)) ranges investigated, and the total capacity of the Metsorb binding phase (∼40,000 ng P) was 2.5-5 times higher than the reported total capacity of the ferrihydrite binding phase. The measurement of DRP in synthetic freshwater and synthetic seawater by Metsorb-DGT over a 4 day deployment period showed excellent agreement with the concentration of DRP measured directly in solution, whereas the ferrihydrite-DGT method significantly underestimated (23-30%) the DRP concentration in synthetic seawater for deployment times of two days or more. Field deployments of Metsorb-DGT s lers with various diffusive layer thicknesses allowed accurate measurement of both the diffusive boundary layer thickness and DRP concentration in situ. The Metsorb-DGT method performs similarly to ferrihydrite-DGT for freshwater measurements but is shown to be more accurate than the ferrihydrite method for determining DRP in seawater.
Shrimp-shell derived carbon nanodots as carbon and nitrogen sources to fabricate three-dimensional N-doped porous carbon electrocatalysts for the oxygen reduction reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5CP06970J
Abstract: 3D N-doped porous carbon material was successfully fabricated by a simple template-assisted pyrolysis method, exhibiting superior ORR catalytic performance.
A facile one-step preparation of hierarchically-structured TiO2 nanotube array photoanodes with enhanced photocatalytic activity
Publisher: Elsevier BV
Date: 11-2011
Synthesis and characterization of N-doped carbonaceous/TiO2 composite photoanodes for visible-light photoelectrocatalytic inactivation of Escherichia coli K-12
Publisher: Elsevier BV
Date: 07-2014
Grey and white matter abnormalities are associated with impaired spatial working memory ability in first-episode schizophrenia.
Publisher: Elsevier BV
Date: 12-2009
DOI: 10.1016/J.SCHRES.2009.09.009
Abstract: Spatial working memory (SWM) dysfunction has been suggested as a trait marker of schizophrenia and implicates a diffuse network involving prefrontal, temporal and parietal cortices. However, structural abnormalities in both grey and white matter in relation to SWM deficits are largely unexplored. The current magnetic resonance imaging (MRI) study examined this relationship in a s le of young first-episode schizophrenia (FES) patients using a whole-brain voxel-based method. SWM ability of 21 FES patients and 41 comparable controls was assessed by the CANTAB SWM task. Using an automated morphometric analysis of brain MRI scans, we assessed the relationship between SWM abilities and both grey matter volume and white matter density in both groups. Our findings demonstrated the different directionality of the association between SWM errors and grey matter volume in left frontal regions and white matter tracts connecting these regions with temporal and occipital areas between FES patients and controls. This suggests that the substrate underpinning the normal variability in SWM function in healthy in iduals may be abnormal in FES, and that the normal neurodevelopmental processes that drive the development of SWM networks are disrupted in schizophrenia.
A {0001} faceted single crystal NiS nanosheet electrocatalyst for dye-sensitised solar cells: sulfur-vacancy induced electrocatalytic activity
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CC01691B
Abstract: Hydrothermally synthesised single crystal NiS nanosheets with an exposed (0001) surface exhibited a light conversion efficiency of 8.62% as an electrocatalyst for dye-sensitised solar cells (DSSCs), significantly higher than that of Pt-based DSSCs (7.36%). The theoretical calculations revealed the exposed (0001) surface with superior catalytic activity owing to the existence of sulfur vacancies.
Development of Chemical Oxygen Demand On-Line Monitoring System Based on a Photoelectrochemical Degradation Principle
Publisher: American Chemical Society (ACS)
Date: 23-02-2006
DOI: 10.1021/ES052018L
Abstract: A simple, rapid, and sensitive on-line chemical oxygen demand (COD) determination method has been proposed and experimentally validated. The method is based on a photoelectrochemical oxidative degradation principle and operates under a continuous flow mode. The method employs a specially designed thin-layer photoelectrochemical cell that incorporates a highly effective nanoparticulate TiO2 photoanode. This approach overcomes many problems associated with the conventional COD determination techniques such as long analysis time, consumption of expensive and toxic reagents, production of secondary toxic waste, and poor reproducibility. The effect of important experimental parameters on the analytical signal generation was systematically investigated, and the optimum conditions were obtained. The method was successfully applied to determine the COD of real s les from various industrial wastewaters. The COD value of real s les determined by this method agreed well with the standard dichromate method. The assay time of 1-5 min/s le can be readily achieved. A practical detection limit of 1 mg L(-1) COD with a linear range of 1-100 mg L(-1) was achieved under the optimum conditions.
The role of electrolyte acid concentration in the electrochemical exfoliation of graphite: Mechanism and synthesis of electrochemical graphene oxide
Publisher: Elsevier BV
Date: 09-2019
Modulation of Auditory and Visual Processing by Delta-9-Tetrahydrocannabinol and Cannabidiol: an fMRI Study
Publisher: Springer Science and Business Media LLC
Date: 16-03-2011
DOI: 10.1038/NPP.2011.17
Pseudocapacitance of Cl-Terminated MXene Nanosheets for Efficient Chloride-Ion Hybrid Capacitors (vol 37, pg 5607, 2023)
Publisher: American Chemical Society (ACS)
Date: 25-05-2023
Nanosheets-built flowerlike micro/nanostructured Bi 2 O 2.33 and its highly efficient iodine removal performances
Publisher: Elsevier BV
Date: 04-2016
Sandwich-Like Reduced Graphene Oxide/Carbon Black/Amorphous Cobalt Borate Nanocomposites as Bifunctional Cathode Electrocatalyst in Rechargeable Zinc-Air Batteries
Publisher: Wiley
Date: 09-08-2018
Enhanced Visible-Light-Driven Photocatalytic Bacterial Inactivation by Ultrathin Carbon-Coated Magnetic Cobalt Ferrite Nanoparticles
Publisher: American Chemical Society (ACS)
Date: 26-03-2018
Abstract: Ultrathin hydrothermal carbonation carbon (HTCC)-coated cobalt ferrite (CoFe
AglnS2/In2S3 heterostructure sensitization of Escherichia coli for sustainable hydrogen production
Publisher: Elsevier BV
Date: 04-2018
An Event Related Functional Magnetic Resonance Imaging Study of Facial Emotion Processing in Asperger Syndrome
Publisher: Elsevier BV
Date: 08-2007
DOI: 10.1016/J.BIOPSYCH.2006.09.037
Abstract: People with Asperger syndrome (AS) have life-long deficits in social behavior. The biological basis of this is unknown, but most likely includes impaired processing of facial emotion. Human social communication involves processing different facial emotions, and at different intensities. However nobody has examined brain function in people with AS when implicitly (unconsciously) processing four primary emotions at varying emotional intensities. We used event-related functional magnetic resonance imaging (MRI) to examine neural responses when people with AS and controls implicitly processed neutral expressions, and mild (25%) and intense (100%) expressions of fear, disgust, happiness, and sadness. We included 18 right-handed adults 9 with AS and 9 healthy controls who did not differ significantly in IQ. Both groups significantly activated 'face perception' areas when viewing neutral faces, including fusiform and extrastriate cortices. Further, both groups had significantly increased activation of fusiform and other extrastriate regions to increasing intensities of fear and happiness. However, people with AS generally showed fusiform and extrastriate hyporesponsiveness compared to controls across emotion types and intensities. Fusiform and extrastriate cortices are activated by facial expressions of four primary emotions in people with AS, but generally to a lesser degree than controls. This may partly explain the social impairments of people with AS.
The melbourne assessment of schizotypy in kids: A useful measure of childhood schizotypal personality disorder
Publisher: Hindawi Limited
Date: 2015
DOI: 10.1155/2015/635732
Abstract: Despite being identified as a high risk cohort for psychosis, there has been relatively little research on the clinical presentation and assessment of Schizotypal Personality Disorder (SPD) in childhood. The current study aimed to develop a measure of childhood SPD (Melbourne Assessment of Schizotypy in Kids (MASK)) and assess discriminant validity against another neurodevelopmental disorder, autism spectrum disorder (ASD). Sixty-eight children aged between 5 and 12 (21 SPD, 15 ASD, and 32 typically developing) and their parents were administered the MASK. The MASK is a 57-item semistructured interview that obtains information from the child, their parents, and the clinician. The results showed high internal consistency for the MASK and higher scores in the SPD group. A factor analysis revealed two MASK factors: social ragmatic symptoms and positive schizotypal symptoms. Both factors were associated with SPD, while only the social ragmatic factor was associated with ASD. Within the two clinical groups, a receiver operating characteristic curve showed that the MASK (cut-off score: 132 out of 228) was a good indicator of SPD diagnosis. These preliminary MASK findings were reliable and consistent and suggest that childhood SPD is characterised by complex symptomology distinguishable from ASD.
White and gray matter alterations in adults with Niemann-Pick disease type C: A cross-sectional study
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 19-05-2010
Photoelectrochemical Manifestation of Photoelectron Transport Properties of Vertically Aligned Nanotubular TiO2 Photoanodes
Publisher: Wiley
Date: 04-01-2008
Abstract: A simple photoelectrochemical method was proposed to quantitatively evaluate the electron transport process of photoelectrocatalytic oxidation of water at vertically aligned nanotubular TiO2 photoanodes. The photoelectrocatalysis reaction resistance (R=k/J(sph)+R(0)=R(I)+R(0)) was measured and used to express the electron transport characteristics of a nanotubular TiO(2) electrode. The overall resistance was found to consist of a variant (R(I)) and an invariant component (R(0)). R(I) was found to be inversely proportional to the saturation photocurrent and it depends on the experimental conditions. The proportional constant, k, represents the minimum applied potential bias required to remove 100 % of the photogenerated electrons from the photocatalyst layer and was found to be independent of the anodization time. The invariant component of the resistance (R(0)) is an inherent property of the semiconductor photocatalyst that represents the sum of Ohmic contact impedance at the conducting substrate/TiO2 interface and crystalline boundary impedance. The magnitude of R(0) linearly increased with anodization time. The real saturated photocurrent density (J(real-sphd)) was found to be independent of R(0) indicating that the electron collection efficiency is independent of the nanotube length.
Transforming chitosan into N-doped graphitic carbon electrocatalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4CC09355K
Abstract: Chitosan, the only alkaline polysaccharide in nature with rich nitrogen content, is used as the sole precursor to obtain N-doped graphitic carbon-based ORR electrocatalysts.
Prevalence and length of the adhesio interthalamica in schizophrenia spectrum disorders
Publisher: Elsevier BV
Date: 10-2008
Characterizing anterior cingulate activation in chronic schizophrenia: A group and single-subject fMRI study
Publisher: Wiley
Date: 20-02-2007
DOI: 10.1111/J.1600-0447.2007.01002.X
Abstract: Functional abnormalities of the dorsal anterior cingulate (dAC) region have been emphasized in schizophrenia, particularly in relation to cognitive deficits. In this study, we sought to further evaluate the notion of dAC hypofunction in chronic schizophrenia patients using a cognitive task specifically designed to activate this region, enabling both group and single-subject level analyses. Twelve male schizophrenia patients and 14 male healthy subjects were studied with functional magnetic resonance imaging (fMRI) and the multi-source interference task (MSIT). Patients and healthy subjects were matched for age, gender, education, task performance and gross surface morphology of the AC region. fMRI analyses were conducted at the group and single-subject levels using stringent whole-brain activation thresholds. Multi-source interference task performance was associated with large and significant activation of the dAC and supplementary motor area (SMA) in patients and healthy subjects. Standard comparison of the two groups indicated that the patients were comparable with healthy subjects in their dAC activation, but had a small cluster of greater SMA activation, while single-subject analyses identified minimal differences in the magnitude or spatial dispersion of dAC activation between the groups. These findings challenge existing notions of impaired dAC activation in chronic schizophrenia and suggest that the functional pathophysiology of this medial-wall region should be considered beyond straightforward models of hypoactivation.
ELECTROCHEMICALLY CONTROLLED TRANSPORT OF POTASSIUM-CHLORIDE ACROSS A CONDUCTING ELECTROACTIVE POLYMER MEMBRANE
Publisher: Elsevier BV
Date: 09-1992
An in situ vapour phase hydrothermal surface doping approach for fabrication of high performance Co3O4 electrocatalysts with an exceptionally high S-doped active surface
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CC00661A
Abstract: A vapour phase hydrothermal doping approach is developed to fabricate highly S-doped Co 3 O 4 nanosheets as electrocatalysts for triiodide reduction in DSSCs.
Electrocatalytic oxidation of benzyl alcohol for simultaneously promoting H2 evolution by a Co0.83Ni0.17/activated carbon electrocatalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NJ00446C
Abstract: Co 0.83 Ni 0.17 alloy nanoparticles on activated carbon were successfully fabricated by a simple thermal-treatment method, as electrocatalyst exhibiting superior HER, OER and electrocatalytic oxidation activity toward benzyl alcohol.
Highly efficient and recyclable triple-shelled Ag@Fe3O4@SiO2@TiO2 photocatalysts for degradation of organic pollutants and reduction of hexavalent chromium ions
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR00534A
Abstract: Herein, we demonstrate the design and fabrication of the well-defined triple-shelled Ag@Fe3O4@SiO2@TiO2 nanospheres with burr-shaped hierarchical structures, in which the multiple distinct functional components are integrated wonderfully into a single nanostructure. In comparison with commercial TiO2 (P25), pure TiO2 microspheres, Fe3O4@SiO2@TiO2 and annealed Ag@Fe3O4@SiO2@TiO2 nanocomposites, the as-obtained amorphous triple-shelled Ag@Fe3O4@SiO2@TiO2 hierarchical nanospheres exhibit a markedly enhanced visible light or sunlight photocatalytic activity towards the photodegradation of methylene blue and photoreduction of hexavalent chromium ions in wastewater. The outstanding photocatalytic activities of the plasmonic photocatalyst are mainly due to the enhanced light harvesting, reduced transport paths for both mass and charge transport, reduced recombination probability of photogenerated electrons/holes, near field electromagnetic enhancement and efficient scattering from the plasmonic nanostructure, increased surface-to-volume ratio and active sites in three dimensional (3D) hierarchical porous nanostructures, and improved photo/chemical stability. More importantly, the hierarchical nanostructured Ag@Fe3O4@SiO2@TiO2 photocatalysts could be easily collected and separated by applying an external magnetic field and reused at least five times without any appreciable reduction in photocatalytic efficiency. The enhanced photocatalytic activity and excellent chemical stability, in combination with the magnetic recyclability, make these multifunctional nanostructures promising candidates to remediate aquatic contaminants and meet the demands of future environmental issues.
UV and visible light photoelectrocatalytic bactericidal performance of 100% {1 1 1} faceted rutile TiO2 photoanode
Publisher: Elsevier BV
Date: 04-2014
An fMRI study of verbal episodic memory encoding in amnestic mild cognitive impairment
Publisher: Elsevier BV
Date: 07-2008
DOI: 10.1016/J.CORTEX.2007.04.005
Abstract: Amnestic mild cognitive impairment (aMCI) is a high-risk and often prodromal state for the development of Alzheimer's disease (AD) and is characterised by isolated episodic memory impairment. Functional neuroimaging studies in healthy subjects consistently report left prefrontal cortex (PFC) activation during verbal episodic memory encoding. The PFC activation at encoding is related to semantic processing which enhances memory. The purpose of this study was to ascertain whether impaired verbal episodic memory in aMCI is related to PFC dysfunction. Using functional magnetic resonance imaging (fMRI) we compared 10 aMCI patients with 10 elderly controls during verbal encoding. The encoding task was sensitive to the effects of semantic processing. Subsequent recognition was tested to measure encoding success. Behavioural results revealed impaired recognition and a lower false recognition rate for semantically related distracters (lures) in aMCI, which suggest impaired semantic processing at encoding. Both groups activated left hemispheric PFC, insula, premotor cortex and cerebellum, but group comparisons revealed decreased activation in left ventrolateral PFC in the aMCI group. The magnitude of activation in left ventrolateral PFC during encoding was positively correlated with recognition accuracy in the control group but not in the aMCI group. We propose that verbal episodic memory impairment in aMCI is related to PFC dysfunction which affects semantic processing at encoding.
Advances in Photocatalytic Disinfection
Publisher: Springer Berlin Heidelberg
Date: 2017
ZnO Hollow Microspheres with Exposed Porous Nanosheets Surface: Structurally Enhanced Adsorption towards Heavy Metal Ions
Publisher: Elsevier BV
Date: 04-2013
Selective Determination of Cr(VI) by Glutaraldehyde Cross-Linked Chitosan Polymer Fluorophores
Publisher: American Chemical Society (ACS)
Date: 23-03-2018
DOI: 10.1021/ACSSENSORS.8B00038
Abstract: Selective determination of aquatic chromium is critically important because of the dramatic differences in health and environment impacts by trivalent and hexavalent forms of chromium however, it is challenging. In this work, for the first time, a nonconjugated polymer fluorophore (GCPF) was synthesized by cross-linking chitosan with glutaraldehyde via Schiff base reactions and systematically investigated for selective determination of Cr(VI). The results revealed that the synthesized GCPF exhibited excellent photostability and water solubility. More importantly, GCPF possessed dramatically enhanced fluorescence intensity originated from the n-π* transitions of the Schiff base subfluorophore groups (e.g., C═N) that can be selectively and sensitively quenched by Cr(VI) through oxidative damages to C═N group. An effective EDTA masking agent approach was employed to minimize ionic interferences. In the presence of high concentration of interference ions including Cr(III), the quenching GCPF fluorescence is capable of selectively determining Cr(VI) within a concentration range up to 50 μM and a detection limit of 0.22 μM. The analytical performance of GCPF was also confirmed by analyzing real surface water and industrial s les.
One-step solid phase synthesis of a highly efficient and robust cobalt pentlandite electrocatalyst for the oxygen evolution reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA07962H
Abstract: One-step concurrent growth of a Co 9 S 8 /carbon nanosheet composite as an efficient and robust oxygen evolution electrocatalyst.
A new approach prevailing over chloride interference in the photoelectrochemical determination of chemical oxygen demand
Publisher: Royal Society of Chemistry (RSC)
Date: 2008
DOI: 10.1039/B805095C
Abstract: A new approach to overcome chloride interferences in the photoelectrochemical determination of chemical oxygen demand (PeCOD) was developed. This approach was based on the kinetic characteristics of photocatalytic oxidation reactions of chloride in the presence and absence of organics. The effectiveness of the proposed approach was evaluated using the newly developed PeCOD system with a wide range of possible scenarios. It was found that the chloride interference was insignificant when a s le meets the two critical criteria, i.e., chloride concentration <or=26.6 ppm and the concentration ratio of chloride to organics <or=5 : 1 (ppm Cl(-) pm COD). The Chemical Oxygen Demand (COD) of such a s le can be directly determined by the direct PeCOD method. When the chloride content in a s le exceeds 26.6 ppm, an appropriate s le dilution could effectively reduce the chloride interference to less than 5%, if the diluted s le meets the critical criteria. An organic addition method was proposed to deal with scenarios for s les containing high chloride and low organic concentrations where the critical criteria cannot be met by simple dilution. Such an approach greatly extends the applicability of the proposed method, covering a wide range of possible real-world scenarios without the need to use expensive (i.e. AgNO(3)) and toxic (i.e. HgSO(4)) masking reagents.
Neonatal brain abnormalities associated with autism spectrum disorder in children born very preterm
Publisher: Wiley
Date: 07-10-2015
DOI: 10.1002/AUR.1558
Abstract: Very preterm (VP) survivors are at increased risk of autism spectrum disorder (ASD) compared with term-born children. This study explored whether neonatal magnetic resonance (MR) brain features differed in VP children with and without ASD at 7 years. One hundred and seventy-two VP children (<30 weeks' gestation or <1250 g birth weight) underwent structural brain MR scans at term equivalent age (TEA 40 weeks' gestation ±2 weeks) and were assessed for ASD at 7 years of age. The presence and severity of white matter, cortical gray matter, deep nuclear gray matter, and cerebellar abnormalities were assessed, and total and regional brain volumes were measured. ASD was diagnosed using a standardized parent report diagnostic interview and confirmed via an independent assessment. Eight VP children (4.7%) were diagnosed with ASD. Children with ASD had more cystic lesions in the cortical white matter at TEA compared with those without ASD (odds ratio [OR] 8.7, 95% confidence interval [CI] 1.5, 51.3, P = 0.02). There was also some evidence for smaller cerebellar volumes in children with ASD compared with those without ASD (OR = 0.82, CI = 0.66, 1.00, P = 0.06). Overall, the results suggest that VP children with ASD have different brain structure in the neonatal period compared with those who do not have ASD. Autism Res 2016, 9: 543-552. © 2015 International Society for Autism Research, Wiley Periodicals, Inc.
Stabilization and Performance Enhancement Strategies for Halide Perovskite Photocatalysts
Publisher: Wiley
Date: 27-12-2023
Abstract: Solar‐energy‐powered photocatalytic fuel production and chemical synthesis are widely recognized as viable technological solutions for a sustainable energy future. However, the requirement of high‐performance photocatalysts is a major bottleneck. Halide perovskites, a category of ersified semiconductor materials with suitable energy‐band‐enabled high‐light‐utilization efficiencies, exceptionally long charge‐carrier‐diffusion‐length‐facilitated charge transport, and readily tailorable compositional, structural, and morphological properties, have emerged as a new class of photocatalysts for efficient hydrogen evolution, CO 2 reduction, and various organic synthesis reactions. Despite the noticeable progress, the development of high‐performance halide perovskite photocatalysts (HPPs) is still hindered by several key challenges: the strong ionic nature and high hydrolysis tendency induce instability and an unsatisfactory activity due to the need for a coactive component to realize redox processes. Herein, the recently developed advanced strategies to enhance the stability and photocatalytic activity of HPPs are comprehensively reviewed. The widely applicable stability enhancement strategies are first articulated, and the activity improvement strategies for fuel production and chemical synthesis are then explored. Finally, the challenges and future perspectives associated with the application of HPPs in efficient production of fuels and value‐added chemicals are presented, indicating the irreplaceable role of the HPPs in the field of photocatalysis.
Synthesis of porous aromatic framework with tuning porosity via ionothermal reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2DT11996J
Abstract: PAF-16 which is based on tetrahedral units (TCPSi) and triangular building units, shows both high thermal stability and high chemical stability. The surface area of PAF-16 can be tuned by changing the reaction temperature and ratio of monomer and catalyst. PAF-16 also shows considerable adsorption capacity of CO(2).
A new neonatal cortical and subcortical brain atlas: the Melbourne Children's Regional Infant Brain (M-CRIB) atlas
Publisher: Elsevier BV
Date: 02-2017
DOI: 10.1016/J.NEUROIMAGE.2016.09.068
Abstract: Investigating neonatal brain structure and function can offer valuable insights into behaviour and cognition in healthy and clinical populations both at term age, and longitudinally in comparison with later time points. Parcellated brain atlases for adult populations are readily available, however warping infant data to adult template space is not ideal due to morphological and tissue differences between these groups. Several parcellated neonatal atlases have been developed, although there remains strong demand for manually parcellated ground truth data with detailed cortical definition. Additionally, compatibility with existing adult atlases is favourable for use in longitudinal investigations. We aimed to address these needs by replicating the widely-used Desikan-Killiany (2006) adult cortical atlas in neonates. We also aimed to extend brain coverage by complementing this cortical scheme with basal ganglia, thalamus, cerebellum and other subcortical segmentations. Thus, we have manually parcellated these areas volumetrically using high-resolution neonatal T
Evidence of a dimensional relationship between schizotypy and schizophrenia: A systematic review
Publisher: Elsevier BV
Date: 03-2013
DOI: 10.1016/J.NEUBIOREV.2013.01.004
Abstract: The personality dimension of schizotypy is well established, and schizotypal traits can be taken to represent a proneness toward developing psychosis. Yet, there are competing theories about the latent structure of schizotypy. More specifically, there is controversy over the extent to which this propensity toward psychosis is present only in a small proportion of the population, or whether it is spread dimensionally throughout the general community. On the basis of accumulating research findings the present article argues for a fully dimensional model of schizotypy. It describes recent neurobiological, neuropsychological, social and environmental evidence supporting the idea that schizotypy in healthy populations, and disorders on the schizophrenia spectrum are fundamentally linked. Directions for further research are also considered.
Natural Polymer-Based Sulfite Biosensor
Publisher: Wiley
Date: 11-1998
DOI: 10.1002/(SICI)1521-4109(199811)10:16<1119::AID-ELAN1119>3.0.CO;2-U
Hippocampal pathology in individuals at ultra-high risk for psychosis: A multi-modal magnetic resonance study
Publisher: Elsevier BV
Date: 08-2010
DOI: 10.1016/J.NEUROIMAGE.2010.04.012
Abstract: Although the hippoc us is a key brain region in the pathophysiology of schizophrenia, it is unclear whether structural or biochemical abnormalities predate illness onset. In this study, we used magnetic resonance imaging and spectroscopy data acquired prior to both the onset of psychosis and treatment with antipsychotics to determine this. Sixty-six young people clinically at ultra high-risk of development of psychosis were recruited, 59 of whom did not later develop a psychotic disorder and 7 who had done so after at least 24 months follow-up. These participants were compared with 29 healthy comparison subjects on multiple independent magnetic resonance measures: hippoc al volume, hippoc al T2 relaxation time, and medial temporal lobe metabolite concentrations (including N-acetylaspartate). We found similar reductions in left hippoc al volume in the at-risk group compared to comparison subjects regardless of later transition status on the right this only reached significance for the at-risk group who did not transition to psychosis. T2 relaxation time in the left hippoc al head was significantly elevated in the later-psychotic group, and this elevation positively correlated with total positive symptoms in the UHR group as a whole. Medial temporal lobe metabolite concentrations did not differ. These findings suggest that there are subtle pathological changes in the hippoc us prior to the development of psychosis, but that they are limited to the left hippoc al head. However, standard measures of neuroanatomical disturbance do not appear to be predictive of later transition, and instead are likely to be non-specific and common in cases that later develop a non-psychotic disorder.
Carbon-embedded Ni nanocatalysts derived from MOFs by a sacrificial template method for efficient hydrogenation of furfural to tetrahydrofurfuryl alcohol
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7DT00628D
Abstract: A Ni/C catalyst prepared by the pyrolysis of Ni-MOFs, synthesized by a facile oil-bath method, showed high activity of hydrogenation of FAL.
Hierarchical MgFe-layered double hydroxide microsphere/graphene composite for simultaneous electrochemical determination of trace Pb(II) and Cd(II)
Publisher: Elsevier BV
Date: 09-2018
Synchronous removal of tetracycline and water hardness ions by capacitive deionization
Publisher: Elsevier BV
Date: 09-2021
In situ growth of well-aligned Ni-MOF nanosheets on nickel foam for enhanced photocatalytic degradation of typical volatile organic compounds
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NR01027H
Abstract: Well-aligned Ni-MOF nanosheet arrays vertically grown on nickel foam were synthesized via a facile in situ solvothermal strategy, which exhibited remarkably improved photocatalytic activities to typical VOCs under visible light irradiation.
Directional synthesis of tin oxide@graphene nanocomposites via a one-step up-scalable wet-mechanochemical route for lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA01131G
Abstract: SnO 2 @graphene nanocomposites with excellent lithium ion battery performance are successfully prepared by a one-step simple and up-scalable wet-mechanochemical method.
Brain extraction using the watershed transform from markers
Publisher: Frontiers Media SA
Date: 2013
Microbiome analysis of dairy cows fed pasture or total mixed ration diets
Publisher: Oxford University Press (OUP)
Date: 11-07-2011
DOI: 10.1111/J.1574-6941.2011.01151.X
Abstract: Understanding rumen microbial ecology is essential for the development of feed systems designed to improve livestock productivity, health and for methane mitigation strategies from cattle. Although rumen microbial communities have been studied previously, few studies have applied next-generation sequencing technologies to that ecosystem. The aim of this study was to characterize changes in microbial community structure arising from feeding dairy cows two widely used diets: pasture and total mixed ration (TMR). Bacterial, archaeal and protozoal communities were characterized by terminal restriction fragment length polymorphism of the lified SSU rRNA gene and statistical analysis showed that bacterial and archaeal communities were significantly affected by diet, whereas no effect was observed for the protozoal community. Deep licon sequencing of the 16S rRNA gene revealed significant differences in the bacterial communities between the diets and between rumen solid and liquid content. At the family level, some important groups of rumen bacteria were clearly associated with specific diets, including the higher abundance of the Fibrobacteraceae in TMR solid s les and members of the propionate-producing Veillonelaceae in pasture s les. This study will be relevant to the study of rumen microbial ecology and livestock feed management.
Converting eggplant biomass into multifunctional porous carbon electrodes for self-powered capacitive deionization
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9EW00239A
Abstract: A self-powered CDI system was constructed from porous carbon derived from eggplant for removal of salt and heavy metal ions.
Directly Hydrothermal Growth of Single Crystal Nb3O7(OH) Nanorod Film for High Performance Dye-Sensitized Solar Cells
Publisher: Wiley
Date: 22-02-2012
Abstract: Hydrothermal growth of high crystallinity Nb(3) O(7) (OH) single crystal nanorod film onto FTO substrate is directly used as the photoanode for DSSCs without calcination. The resultant DSSCs possess an impressive overall efficiency of 6.77%, the highest among all reported DSSCs assembled by niobium oxide-based photoanodes.
Top 10 reviewers for Environmental Modelling and Software in 2014
Publisher: Elsevier BV
Date: 10-2015
Wildfire impact: Natural experiment reveals differential short-term changes in soil microbial communities
Publisher: Elsevier BV
Date: 06-2017
Palladium-decorated hierarchical titania constructed from the metal-organic frameworks NH2-MIL-125(Ti) as a robust photocatalyst for hydrogen evolution
Publisher: Elsevier BV
Date: 12-2017
Neural Basis of Δ-9-Tetrahydrocannabinol and Cannabidiol: Effects During Response Inhibition
Publisher: Elsevier BV
Date: 12-2008
DOI: 10.1016/J.BIOPSYCH.2008.05.011
Abstract: This study examined the effect of Delta-9-tetrahydrocannabinol (THC) and cannabidiol (CBD) on brain activation during a motor inhibition task. Functional magnetic resonance imaging and behavioural measures were recorded while 15 healthy volunteers performed a Go/No-Go task following administration of either THC or CBD or placebo in a double-blind, pseudo-randomized, placebo-controlled repeated measures within-subject design. Relative to placebo, THC attenuated activation in the right inferior frontal and the anterior cingulate gyrus. In contrast, CBD deactivated the left temporal cortex and insula. These effects were not related to changes in anxiety, intoxication, sedation, and psychotic symptoms. These data suggest that THC attenuates the engagement of brain regions that mediate response inhibition. CBD modulated function in regions not usually implicated in response inhibition.
N-type Cu2O Film for Photocatalytic and Photoelectrocatalytic Processes: Its stability and Inactivation of E. coli
Publisher: Elsevier BV
Date: 2015
Molten Salt-Assisted Growth of Perovskite Films with Submillimeter-Sized Grains
Publisher: American Chemical Society (ACS)
Date: 06-01-2017
Synergistic Cr2O3@Ag Heterostructure Enhanced Electrocatalytic CO2 Reduction to CO
Publisher: Wiley
Date: 10-06-2022
Abstract: The electrocatalytic CO 2 RR to produce value‐added chemicals and fuels has been recognized as a promising means to reduce the reliance on fossil resources it is, however, hindered due to the lack of high‐performance electrocatalysts. The effectiveness of sculpturing metal/metal oxides (MMO) heterostructures to enhance electrocatalytic performance toward CO 2 RR has been well documented, nonetheless, the precise synergistic mechanism of MMO remains elusive. Herein, an in operando electrochemically synthesized Cr 2 O 3 –Ag heterostructure electrocatalyst (Cr 2 O 3 @Ag) is reported for efficient electrocatalytic reduction of CO 2 to CO. The obtained Cr 2 O 3 @Ag can readily achieve a superb FE CO of 99.6% at −0.8 V (vs RHE) with a high J CO of 19.0 mA cm −2 . These studies also confirm that the operando synthesized Cr 2 O 3 @Ag possesses high operational stability. Notably, operando Raman spectroscopy studies reveal that the markedly enhanced performance is attributable to the synergistic Cr 2 O 3 –Ag heterostructure induced stabilization of CO 2 •− /*COOH intermediates. DFT calculations unveil that the metallic‐Ag‐catalyzed CO 2 reduction to CO requires a 1.45 eV energy input to proceed, which is 0.93 eV higher than that of the MMO‐structured Cr 2 O 3 @Ag. The exemplified approaches in this work would be adoptable for design and development of high‐performance electrocatalysts for other important reactions.
Cellulose Degradation by Micromonosporas Recovered from Freshwater Lakes and Classification of These Actinomycetes by DNA Gyrase B Gene Sequencing
Publisher: American Society for Microbiology
Date: 15-11-2008
DOI: 10.1128/AEM.01092-08
Abstract: A number of Micromonospora strains isolated from the water column, sediment, and cellulose baits placed in freshwater lakes were shown to be able to degrade cellulose in lake water without any addition of nutrients. A selective isolation method was also developed to demonstrate that CFU arose from both spores and hyphae that inhabit the lake environment. Gyrase B gene sequencing performed on the isolates identified a number of new centers of variation within Micromonospora , but the most actively cellulolytic strains were recovered in a single cluster that equated with the type species of the genus, M. chalcea .
Atomically dispersed bimetallic Fe–Co electrocatalysts for green production of ammonia
Publisher: Springer Science and Business Media LLC
Date: 14-11-2022
Hollow carbon sphere encapsulated nickel nanoreactor for aqueous-phase hydrogenation-rearrangement tandem reaction with enhanced catalytic performance
Publisher: Elsevier BV
Date: 06-2022
Antibiotic-resistance gene transfer in antibiotic-resistance bacteria under different light irradiation: Implications from oxidative stress and gene expression
Publisher: Elsevier BV
Date: 02-2019
DOI: 10.1016/J.WATRES.2018.11.019
Abstract: Due to the significant public health risks, there is substantial scientific interest in the increasing abundance of antibiotic-resistance bacteria (ARB) and the spread of antibiotic-resistance genes (ARGs) in aquatic environments. To clearly understand the mechanism of ARG transfer, this study examined the conjugative transfer of genes encoding resistance to cephalosporin (bla
The surface sulfur doping induced enhanced performance of cobalt catalysts in oxygen evolution reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC04387A
Abstract: Surface sulfur-doping can change the electronic properties of Co catalysts, leading to significantly improved performance in oxygen evolution reactions.
Role of in Situ Resultant H2O2 in the Visible-Light-Driven Photocatalytic Inactivation of E. coli Using Natural Sphalerite: A Genetic Study
Publisher: American Chemical Society (ACS)
Date: 03-02-2015
DOI: 10.1021/JP511201W
Abstract: This study investigated how a natural sphalerite (NS) photocatalyst, under visible light irradiation, supports photocatalytic bacterial inactivation. This was done by comparing parent E. coli BW25113, and its two isogenic single-gene knock-out mutants, E. coli JW0797-1 (dps(-) mutant) and JW1721-1 (katE(-) mutant), where both dps and KatE genes are likely related to H2O2 production. NS could inactivate approximately 5-, 7- and 7-log of E. coli BW25113, JW0797-1, and JW1721-1 within 6 h irradiation, respectively. The two isogenic mutants were more susceptible to photocatalysis than the parental strain because of their lack of a defense system against H2O2 oxidative stress. The ability of in situ resultant H2O2 to serve as a defense against photocatalytic inactivation was also confirmed using scavenging experiments and partition system experiments. Studying catalase activity further revealed that in situ H2O2 played an important role in these inactivation processes. The destruction of bacterial cells from the cell envelope to the intracellular components was also observed using field emission-scanning electron microscopy. Moreover, FT-IR was used to monitor bacterial cell decomposition, key functional group evolution, and bacterial cell structures. This is the first study to investigate the photocatalytic inactivation mechanism of E. coli using single-gene deletion mutants under visible light irradiation.
Early life predictors of brain development at term-equivalent age in infants born across the gestational age spectrum.
Publisher: Elsevier BV
Date: 2018
DOI: 10.1016/J.NEUROIMAGE.2018.04.031
Abstract: It is well established that preterm infants have altered brain development compared with full-term (FT ≥37 weeks' gestational age [GA]) infants, however the perinatal factors associated with brain development in preterm infants have not been fully elucidated. In particular, perinatal predictors of brain development may differ between very preterm infants (VP <32 weeks' GA) and infants born moderate (MP 32-33 weeks' GA) and late (LP 34-36 weeks' GA) preterm, but this has not been studied. This study aimed to investigate the effects of early life predictors on brain volume and microstructure at term-equivalent age (TEA 38-44 weeks), and whether these effects differ for GA groups (VP, MP, LP or FT). Structural images from 328 infants (91 VP, 63 MP, 104 LP and 70 FT) were segmented into white matter, cortical grey matter, cerebrospinal fluid, subcortical grey matter, brainstem and cerebellum. Cortical grey matter and white matter images were analysed using voxel-based morphometry. Fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD) and radial diffusivity (RD) images from 361 infants (92 VP, 69 MP, 120 LP and 80 FT) were analysed using Tract-Based Spatial Statistics. Relationships between early life predictors (birthweight standard deviation score [BWSDS], multiple birth, sex, postnatal growth and social risk) and global brain volumes were analysed using linear regressions. Relationships between early life predictors and regional brain volumes and diffusion measures were analysed using voxelwise non-parametric permutation testing. Male sex was associated with higher global volumes of all tissues and higher regional volumes throughout much of the cortical grey matter and white matter, particularly in the FT group. Male sex was also associated with lower FA and higher AD, RD and MD in the optic radiation, external and internal capsules and corona radiata, and these associations were generally similar between GA groups. Higher BWSDS was associated with higher global volumes of all tissues and higher regional volumes in much of the cortical grey matter and white matter in all GA groups, as well as higher FA and lower RD and MD in many major tracts (corpus callosum, optic radiation, internal and external capsules and corona radiata), particularly in the MP and LP groups. Multiple birth and social risk also showed associations with global and regional volumes and regional diffusion values which varied by GA group, but these associations were not independent of the other early life predictors. Postnatal growth was not associated with brain volumes or diffusion values. Early life predictors of brain volumes and microstructure at TEA include sex, BWSDS, multiple birth and social risk, which have different effects based on GA group at birth. This study improves knowledge of the perinatal factors associated with brain abnormalities in infants born across the prematurity spectrum.
Synthesis and characterization of novel SiO2 and TiO2 co-pillared montmorillonite composite for adsorption and photocatalytic degradation of hydrophobic organic pollutants in water
Publisher: Elsevier BV
Date: 04-2011
Investigating arsenic speciation and mobilization in sediments with DGT and DET: A mesocosm evaluation of oxic-anoxic transitions
Publisher: American Chemical Society (ACS)
Date: 20-03-2012
DOI: 10.1021/ES204484K
Abstract: Mobilization of arsenic from freshwater and estuarine sediments during the transition from oxic to anoxic conditions was investigated using recently developed diffusive s ling techniques. Arsenic speciation and Fe(II) concentrations were measured at high resolution (1-3 mm) with in situ diffusive gradients in thin films (DGT) and diffusive equilibration in thin films (DET) techniques. Water column anoxia induced Fe(II) and As(III) fluxes from the sediment. A correlation between water column Fe(II) and As(III) concentrations was observed in both freshwater (r(s) = 0.896, p < 0.001) and estuarine (r(s) = 0.557, p < 0.001) mesocosms. Porewater s ling by DGT and DET techniques confirmed that arsenic mobilization was associated with the reductive dissolution of Fe(III) (hydr)oxides in the suboxic zone of the sediment a relationship that was visible because of the ability to measure the coincident profiles of these species using combined DGT and DET s lers. The selective measurement of As(III) and total inorganic arsenic by separate DGT s lers indicated that As(III) was the primary species mobilized from the solid phase to the porewater. This measurement approach effectively ruled out substantial As(V) mobilization from the freshwater and estuarine sediments in this experiment. This study demonstrates the capabilities of the DGT and DET techniques for investigating arsenic speciation and mobilization over a range of sediment conditions.
Layered Fe(III) doped TiO2 thin-film electrodes for the photoelectrocatalytic oxidation of glucose and potassium hydrogen phthalate
Publisher: Springer Science and Business Media LLC
Date: 20-07-2011
Platinum@regular indium oxide nanooctahedra as difunctional counter electrodes for dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA14796G
Abstract: A difunctional counter electrode composed of platinum nanoparticles supported on regular In 2 O 3 nanooctahedra demonstrates good catalytic activity and excellent light scattering.
On the synergistic effect of hydrohalic acids in the shape-controlled synthesis of anatase TiO2 single crystals
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2CE26744F
Object classification via feature fusion based marginalized kernels
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2015
Phase III, Randomized, Placebo-Controlled Trial of CC-486 (Oral Azacitidine) in Patients With Lower-Risk Myelodysplastic Syndromes
Publisher: American Society of Clinical Oncology (ASCO)
Date: 05-2021
DOI: 10.1200/JCO.20.02619
Abstract: Treatment options are limited for patients with lower-risk myelodysplastic syndromes (LR-MDS). This phase III, placebo-controlled trial evaluated CC-486 (oral azacitidine), a hypomethylating agent, in patients with International Prognostic Scoring System LR-MDS and RBC transfusion–dependent anemia and thrombocytopenia. Patients were randomly assigned 1:1 to CC-486 300-mg or placebo for 21 days/28-day cycle. The primary end point was RBC transfusion independence (TI). Two hundred sixteen patients received CC-486 (n = 107) or placebo (n = 109). The median age was 74 years, median platelet count was 25 × 10 9 /L, and absolute neutrophil count was 1.3 × 10 9 /L. In the CC-486 and placebo arms, 31% and 11% of patients, respectively, achieved RBC-TI ( P = .0002), with median durations of 11.1 and 5.0 months. Reductions of ≥ 4 RBC units were attained by 42.1% and 30.6% of patients, respectively, with median durations of 10.0 and 2.3 months, and more CC-486 patients had ≥ 1.5 g/dL hemoglobin increases from baseline (23.4% v 4.6%). Platelet hematologic improvement rate was higher with CC-486 (24.3% v 6.5%). Underpowered interim overall survival analysis showed no difference between CC-486 and placebo (median, 17.3 v 16.2 months P = .96). Low-grade GI events were the most common adverse events in both arms. In the CC-486 and placebo arms, 90% and 73% of patients experienced a grade 3-4 adverse event. Overall death rate was similar between arms, but there was an imbalance in deaths during the first 56 days (CC-486, n = 16 placebo, n = 6), most related to infections the median pretreatment absolute neutrophil count for the 16 CC-486 patients was 0.57 × 10 9 /L. CC-486 significantly improved RBC-TI rate and induced durable bilineage improvements in patients with LR-MDS and high-risk disease features. More early deaths occurred in the CC-486 arm, most related to infections in patients with significant pretreatment neutropenia. Further evaluation of CC-486 in MDS is needed.
Perovskite Microcrystals with Intercalated Monolayer MoS2 Nanosheets as Advanced Photocatalyst for Solar-Powered Hydrogen Generation
Publisher: Elsevier BV
Date: 09-2020
Anchoring Single Copper Atoms to Microporous Carbon Spheres as High‐Performance Electrocatalyst for Oxygen Reduction Reaction
Publisher: Wiley
Date: 16-07-2021
Abstract: Although the carbon‐supported single‐atom (SA) electrocatalysts (SAECs) have emerged as a new form of highly efficient oxygen reduction reaction (ORR) electrocatalysts, the preferable sites of carbon support for anchoring SAs are somewhat elusive. Here, a KOH activation approach is reported to create abundant defects/vacancies on the porous graphitic carbon nanosphere (CNS) with selective adsorption capability toward transition‐metal (TM) ions and innovatively utilize the created defects/vacancies to controllably anchor TM–SAs on the activated CNS via TMN x coordination bonds. The synthesized TM‐based SAECs (TM‐SAs@N‐CNS, TM: Cu, Fe, Co, and Ni) possess superior ORR electrocatalytic activities. The Cu‐SAs@N‐CNS demonstrates excellent ORR and oxygen evolution reaction (OER) bifunctional electrocatalytic activities and is successfully applied as a highly efficient air cathode material for the Zn–air battery. Importantly, it is proposed and validated that the N‐terminated vacancies on graphitic carbons are the preferable sites to anchor Cu‐SAs via a Cu(NC 2 ) 3 (NC) coordination configuration with an excellent promotional effect toward ORR. This synthetic approach exemplifies the expediency of suitable defects/vacancies creation for the fabrication of high‐performance TM‐based SAECs, which can be implemented for the synthesis of other carbon‐supported SAECs.
An inverted BiI3/PCBM binary quasi-bulk heterojunction solar cell with a power conversion efficiency of 1.50%
Publisher: Elsevier BV
Date: 07-2020
Restoration of Autophagy Alleviates Hepatic ER Stress and Impaired Insulin Signalling Transduction in High Fructose-Fed Male Mice
Publisher: The Endocrine Society
Date: 2015
DOI: 10.1210/EN.2014-1454
Abstract: High-carbohydrate (mainly fructose) consumption is a major dietary factor for hepatic insulin resistance, involving endoplasmic reticulum (ER) stress and lipid accumulation. Because autophagy has been implicated in ER stress, the present study investigated the role of autophagy in high-fructose (HFru) diet-induced hepatic ER stress and insulin resistance in male C57BL/6J mice. The results show that chronic HFru feeding induced glucose intolerance and impaired insulin signaling transduction in the liver, associated with ER stress and the accumulation of lipids. Intriguingly, hepatic autophagy was suppressed as a result of activation of mammalian target of rapamycin. The suppressed autophagy was detected within 6 hours after HFru feeding along with activation of both inositol-requiring enzyme 1 and protein kinase RNA-like endoplasmic reticulum kinase pathways. These events occurred prior to lipid accumulation or lipogenesis and were sufficient to blunt insulin signaling transduction with activation of c-Jun N-terminal kinase/inhibitory-κB kinase and serine phosphorylation of insulin receptor substrate 1. The stimulation of autophagy attenuated ER stress- and c-Jun N-terminal kinase/inhibitory-κB kinase-associated impairment in insulin signaling transduction in a mammalian target of rapamycin -independent manner. Taken together, our data suggest that restoration of autophagy functions disrupted by fructose is able to alleviate ER stress and improve insulin signaling transduction.
S,N-Containing Co-MOF derived Co9S8@S,N-doped carbon materials as efficient oxygen electrocatalysts and supercapacitor electrode materials
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6QI00403B
Abstract: Co 9 S 8 @S,N-doped carbon materials derived from S,N-containing Co-MOFs exhibited superior performance as bifunctional oxygen electrocatalysts and supercapacitor electrode materials.
Associative memory
Publisher: Cambridge University Press
Date: 10-2009
An environmentally benign LIB fabrication process using a low cost, water soluble and efficient binder
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA12159C
Abnormal Relationship Between Medial Temporal Lobe and Subcortical Dopamine Function in People With an Ultra High Risk for Psychosis
Publisher: Oxford University Press (OUP)
Date: 02-05-2011
Highly efficient removal of hexavalent chromium in aqueous solutionsviachemical reduction of plate-like micro/nanostructured zero valent iron
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA10846J
Abstract: The plate-like micro/nanostructured zero valent iron has exhibited the significantly enhanced ability to remove Cr( vi ) from the real electroplating wastewater compared with the commercial zero valent iron.
Coexisting Single‐Atomic Fe and Ni Sites on Hierarchically Ordered Porous Carbon as a Highly Efficient ORR Electrocatalyst
Publisher: Wiley
Date: 16-09-2020
Coupled proton vibrations between two weak acids: the hinge complex between formic acid and trifluoroethanol
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2CP04176F
Abstract: Raman and FTIR spectra of an acid–alcohol complex show complementary signatures from acidic and alcoholic OH stretching, proving its existence.
A New Graphdiyne Nanosheet/Pt Nanoparticle‐Based Counter Electrode Material with Enhanced Catalytic Activity for Dye‐Sensitized Solar Cells
Publisher: Wiley
Date: 13-04-2015
Pseudocapacitive desalination via valence engineering with spindlelike manganese oxide/carbon composites
Publisher: Springer Science and Business Media LLC
Date: 19-05-2021
A new geometric biclustering algorithm based on the Hough transform for analysis of large-scale microarray data
Publisher: Elsevier BV
Date: 03-2008
DOI: 10.1016/J.JTBI.2007.11.030
Abstract: Biclustering is an important tool in microarray analysis when only a subset of genes co-regulates in a subset of conditions. Different from standard clustering analyses, biclustering performs simultaneous classification in both gene and condition directions in a microarray data matrix. However, the biclustering problem is inherently intractable and computationally complex. In this paper, we present a new biclustering algorithm based on the geometrical viewpoint of coherent gene expression profiles. In this method, we perform pattern identification based on the Hough transform in a column-pair space. The algorithm is especially suitable for the biclustering analysis of large-scale microarray data. Our studies show that the approach can discover significant biclusters with respect to the increased noise level and regulatory complexity. Furthermore, we also test the ability of our method to locate biologically verifiable biclusters within an annotated set of genes.
Titanium dioxide-based DGT for measuring dissolved As(V), V(V), Sb(V), Mo(VI) and W(VI) in water
Publisher: Elsevier BV
Date: 02-2013
DOI: 10.1016/J.TALANTA.2012.11.070
Abstract: A titanium dioxide-based DGT method (Metsorb-DGT) was evaluated for the measurement of As(V), V(V), Sb(V), Mo(VI), W(VI) and dissolved reactive phosphorus (DRP) in synthetic waters. Mass vs. time DGT deployments at pH 6.06 (0.01 mol L(-1) NaNO3) demonstrated linear uptake of all analytes (R(2) ≥ 0.994). Diffusion coefficients measured using a diffusion cell were in reasonable agreement with diffusion coefficients measured using DGT s lers (DCell/DDGT=0.82-1.10), although a systematic difference was apparent. The Metsorb-DGT method was independent of ionic strength (0.001-0.7 mol L(-1) NaNO3 at pH 7.1) for the measurement of all analytes (CDGT/CSol=0.88-1.11) and, with the exception of V(V), the method was independent of pH (3.98-8.24, 0.01 mol L(-1) NaNO3), indicated by CDGT/CSol values in the range 0.88-1.13 for short-term deployments (up to 10h). For V(V) at pH 3.98, Metsorb-DGT underestimated the solution concentration by 17%, presumably due to weak binding of the VO2(+) species. The Metsorb-DGT and ferrihydrite-DGT (in situ precipitated ferrihydrite) methods were compared by deploying s lers in synthetic freshwater (pH 7.20, conductivity 223 μS cm(-1)) and synthetic seawater (pH 8.3. salinity 34.6) for up to four days. For synthetic freshwater, CDGT/CSol values between 0.87-1.17 were obtained for all analytes measured by the Metsorb-DGT method over the deployment period. For ferrihydrite-DGT, CDGT/CSol values between 0.97-1.23 were obtained for As(V), V(V), W(VI) and DRP. However, Mo and Sb(V) showed reduced uptake and CDGT/CSol values were in the range 0.18-1.14 and 0.39-0.98, respectively. In synthetic seawater deployments, Metsorb-DGT was capable of measuring As(V), V(V), Sb(V), W(VI) and DRP for up to 4 days (CDGT/CSol=0.89-1.26), however, this method was not capable of measuring Mo for deployment times >4h (CDGT=0.27-0.72). For ferrihydrite-DGT, CDGT/CSol values in the range 0.92-1.16 were obtained for As(V), V(V) and DRP, however, Mo(VI), Sb(V) and W(VI) could not be measured to within 15% of the solution concentration (CDGT/CSol 0.02-0.83).
Inorganic Photocatalysts for Overall Water Splitting
Publisher: Wiley
Date: 25-01-2012
Abstract: Photocatalytic water splitting using semiconductor photocatalysts has been considered as a "green" process for converting solar energy into hydrogen. The pioneering work on electrochemical photolysis of water at TiO(2) electrode, reported by Fujishima and Honda in 1972, ushered in the area of solar fuel. As the real ultimate solution for solar fuel-generation, overall water splitting has attracted interest from researchers for some time, and a variety of inorganic photocatalysts have been developed to meet the challenge of this dream reaction. To date, high-efficiency hydrogen production from pure water without the assistance of sacrificial reagents remains an open challenge. In this Focus Review, we aim to provide a whole picture of overall water splitting and give an outlook for future research.
Preparation, characterisation and sensing application of inkjet-printed nanostructured TiO2 photoanode
Publisher: Elsevier BV
Date: 06-2010
Manipulating the assembled structure of atomically thin CoSe2 nanomaterials for enhanced water oxidation catalysis
Publisher: Elsevier BV
Date: 03-2019
Development of an electrochemical flow injection immunoassay (FIIA) for the real-time monitoring of biospecific interactions
Publisher: Elsevier BV
Date: 11-1999
Geographical location influences the composition of the gut microbiota in wild house mice (Mus musculus domesticus) at a fine spatial scale
Publisher: Public Library of Science (PLoS)
Date: 26-09-2019
Remarkably enhanced water splitting activity of nickel foam due to simple immersion in a ferric nitrate solution
Publisher: Springer Science and Business Media LLC
Date: 08-2018
Erratum: Modulation of Auditory and Visual Processing by Delta-9-Tetrahydrocannabinol and Cannabidiol: an fMRI Study
Publisher: Springer Science and Business Media LLC
Date: 15-06-2011
DOI: 10.1038/NPP.2011.58
Photocatalytic Hydrogen Production
Publisher: Wiley
Date: 14-01-2022
Photoelectrocatalytic oxidation of organic compounds at nanoporous TiO2 electrodes in a thin-layer photoelectrochemical cell
Publisher: Elsevier BV
Date: 15-08-2007
Ultrathin platinum nanowires grown on single-layered nickel hydroxide with high hydrogen evolution activity
Publisher: Springer Science and Business Media LLC
Date: 02-03-2015
DOI: 10.1038/NCOMMS7430
Rutile nanowire arrays: tunable surface densities, wettability and photochemistry
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM12690C
Transport across stand-alone conducting polypyrrole membranes containing dodecylsulfate counterions
Publisher: Elsevier BV
Date: 10-1994
Hydrogenation Synthesis of Blue TiO2 for High-Performance Lithium-Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 22-04-2014
DOI: 10.1021/JP501819P
Dual-atom Pt heterogeneous catalyst with excellent catalytic performances for the selective hydrogenation and epoxidation
Publisher: Springer Science and Business Media LLC
Date: 26-05-2021
DOI: 10.1038/S41467-021-23517-X
Abstract: Atomically monodispersed heterogeneous catalysts with uniform active sites and high atom utilization efficiency are ideal heterogeneous catalytic materials. Designing such type of catalysts, however, remains a formidable challenge. Herein, using a wet-chemical method, we successfully achieved a mesoporous graphitic carbon nitride (mpg-C 3 N 4 ) supported dual-atom Pt 2 catalyst, which exhibited excellent catalytic performance for the highly selective hydrogenation of nitrobenzene to aniline. The conversion of ˃99% is significantly superior to the corresponding values of mpg-C 3 N 4 -supported single Pt atoms and ultra-small Pt nanoparticles (~2 nm). First-principles calculations revealed that the excellent and unique catalytic performance of the Pt 2 species originates from the facile H 2 dissociation induced by the diatomic characteristics of Pt and the easy desorption of the aniline product. The produced Pt 2 /mpg-C 3 N 4 s les are versatile and can be applied in catalyzing other important reactions, such as the selective hydrogenation of benzaldehyde and the epoxidation of styrene.
Preventing academic difficulties in preterm children: a randomised controlled trial of an adaptive working memory training intervention - IMPRINT study.
Publisher: Springer Science and Business Media LLC
Date: 16-09-2013
Abstract: Very preterm children exhibit difficulties in working memory, a key cognitive ability vital to learning information and the development of academic skills. Previous research suggests that an adaptive working memory training intervention (Cogmed) may improve working memory and other cognitive and behavioural domains, although further randomised controlled trials employing long-term outcomes are needed, and with populations at risk for working memory deficits, such as children born preterm. In a cohort of extremely preterm ( weeks’ gestation)/extremely low birthweight ( g) 7-year-olds, we will assess the effectiveness of Cogmed in improving academic functioning 2 years’ post-intervention. Secondary objectives are to assess the effectiveness of Cogmed in improving working memory and attention 2 weeks’, 12 months’ and 24 months’ post-intervention, and to investigate training related neuroplasticity in working memory neural networks 2 weeks’ post-intervention. This double-blind, placebo-controlled, randomised controlled trial aims to recruit 126 extremely preterm/extremely low birthweight 7-year-old children. Children attending mainstream school without major intellectual, sensory or physical impairments will be eligible. Participating children will undergo an extensive baseline cognitive assessment before being randomised to either an adaptive or placebo (non-adaptive) version of Cogmed. Cogmed is a computerised working memory training program consisting of 25 sessions completed over a 5 to 7 week period. Each training session takes approximately 35 minutes and will be completed in the child’s home. Structural, diffusion and functional Magnetic Resonance Imaging, which is optional for participants, will be completed prior to and 2 weeks following the training period. Follow-up assessments focusing on academic skills (primary outcome), working memory and attention (secondary outcomes) will be conducted at 2 weeks’, 12 months’ and 24 months’ post-intervention. To our knowledge, this study will be the first randomised controlled trial to (a) assess the effectiveness of Cogmed in school-aged extremely preterm/extremely low birthweight children, while incorporating advanced imaging techniques to investigate neural changes associated with adaptive working memory training, and (b) employ long-term follow-up to assess the potential benefit of improved working memory on academic functioning. If effective, Cogmed would serve as a valuable, available intervention for improving developmental outcomes for this population. Australian New Zealand Clinical Trials Registry ACTRN12612000124831 .
DEVELOPMENT OF A POLYMER-DISPERSED MERCURY MODIFIED ELECTRODE
Publisher: Elsevier BV
Date: 1990
Strongly Coupled CoCr2 O4 /Carbon Nanosheets as High Performance Electrocatalysts for Oxygen Evolution Reaction.
Publisher: Wiley
Date: 18-04-2016
Enhanced simultaneous PEC eradication of bacteria and antibiotics by facilely fabricated high-activity {001} facets TiO2 mounted onto TiO2 nanotubular photoanode
Publisher: Elsevier BV
Date: 09-2016
DOI: 10.1016/J.WATRES.2016.06.001
Abstract: Biohazards and coexisted antibiotics are two groups of emerging contaminants presented in various aquatic environments. They can pose serious threat to the ecosystem and human health. As a result, inactivation of biohazards, degradation of antibiotics, and simultaneous removal of them are highly desired. In this work, a novel photoanode with a hierarchical structured {001} facets exposed nano-size single crystals (NSC) TiO2 top layer and a perpendicularly aligned TiO2 nanotube array (NTA) bottom layer (NSC/NTA) was successfully fabricated. The morphology and facets of anatase TiO2 nanoparticles covered on the top of NTA layer could be controlled by adjusting precalcination temperature and heating rate as the pure NTA was cl ed with glasses. Appropriate recalcination can timely remove surface F from {001} facets, and the photocatalytic activity of the resultant photoanode was subsequently activated. NSC/NTA photoanode fabricated under 500 °C precalcination with 20 °C min(-1) followed by 550 °C recalcination possessed highest photoelectrocatalytic efficiency to simultaneously remove bacteria and antibiotics. Results suggest that two-step calcination is necessary for fabrication of high photocatalytic activity NSC/NTA photoanode. The capability of simultaneous eradication of bacteria and antibiotics shows great potential for development of a versatile approach to effectively purify various wastewaters contaminated with complex pollutants.
Proposal for efficient mode converter based on cavity quantum electrodynamics dark mode in a semiconductor quantum dot coupled to a bimodal microcavity
Publisher: AIP Publishing
Date: 24-10-2014
DOI: 10.1063/1.4899211
Abstract: The ability to engineer and convert photons between different modes in a solid-state approach has extensive technological implications not only for classical communication systems but also for future quantum networks. In this paper, we put forward a scheme for coherent mode conversion of optical photons by utilizing the intermediate coupling between a single quantum dot and a bimodal photonic crystal microcavity via a waveguide. Here, one mode of the photonic crystal microcavity is coherently driven by an external single-frequency continuous-wave laser field and the two cavity modes are not coupled to each other due to their orthogonal polarizations. The undriven cavity mode is thus not directly coupled to the input driving laser and the only way it can get light is via the quantum dot. The influences of the system parameters on the photon-conversion efficiency are analyzed in detail in the limit of weak probe field and it is found that high photon-conversion efficiency can be achieved under appropriate conditions. It is shown that the cavity dark mode, which is a superposition of the two optical modes and is decoupled from the quantum dot, can appear in such a hybrid optical system. We discuss the properties of the dark mode and indicate that the formation of the dark mode enables the efficient transfer of optical fields between the two cavity modes.
Approaching the activity limit of CoSe2 for oxygen evolution via Fe doping and Co vacancy
Publisher: Springer Science and Business Media LLC
Date: 03-04-2020
DOI: 10.1038/S41467-020-15498-0
Abstract: Electronic structure engineering lies at the heart of efficient catalyst design. Most previous studies, however, utilize only one technique to modulate the electronic structure, and therefore optimal electronic states are hard to be achieved. In this work, we incorporate both Fe dopants and Co vacancies into atomically thin CoSe 2 nanobelts for /coxygen evolution catalysis, and the resulted CoSe 2 -D Fe –V Co exhibits much higher catalytic activity than other defect-activated CoSe 2 and previously reported FeCo compounds. Deep characterizations and theoretical calculations identify the most active center of Co 2 site that is adjacent to the V Co -nearest surface Fe site. Fe doping and Co vacancy synergistically tune the electronic states of Co 2 to a near-optimal value, resulting in greatly decreased binding energy of OH* (ΔE OH ) without changing ΔE O , and consequently lowering the catalytic overpotential. The proper combination of multiple defect structures is promising to unlock the catalytic power of different catalysts for various electrochemical reactions.
Carbon for the oxygen reduction reaction: a defect mechanism
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA02229K
Abstract: A new defect mechanism for the ORR was proposed based on the theoretical calculations and our experimental results.
Engineered Hematite Mesoporous Single Crystals Drive Drastic Enhancement in Solar Water Splitting
Publisher: American Chemical Society (ACS)
Date: 14-12-2016
DOI: 10.1021/ACS.NANOLETT.5B04059
Abstract: Mesoporous single crystals (MSCs) rendering highly accessible surface area and long-range electron conductivity are extremely significant in many fields, including catalyst, solar fuel, and electrical energy storage technologies. Hematite semiconductor, whose performance has been crucially limited by its pristine poor charge separation efficiency in solar water splitting, should benefit from this strategy. Despite successful synthesis of many metal oxide MSCs, the fabrication of hematite MSCs remains to be a great challenge due to its quite slow hydrolysis rate in water. Herein, for the first time, we have developed a synthetic strategy to prepare hematite MSCs and systematically investigated their growth mechanism. The electrode fabricated with these crystals is able to achieve a photocurrent density of 0.61 mA/cm(2) at 1.23 V vs RHE under AM 1.5G simulated sunlight, which is 20 times higher than that of electrodes made of solid single crystals. The enhancement is ascribed to the superior light absorption and enhanced charges separation. Our results demonstrate the advantage of incorporation of nanopores into the large-sized hematite single crystals and provide a valuable insight for the development of high performance photoelectrodes in PEC application.
Systematic Approach to In-Depth Understanding of Photoelectrocatalytic Bacterial Inactivation Mechanisms by Tracking the Decomposed Building Blocks
Publisher: American Chemical Society (ACS)
Date: 04-08-2014
DOI: 10.1021/ES502471H
Abstract: A systematic approach was developed to understand, in-depth, the mechanisms involved during the inactivation of bacterial cells using photoelectrocatalytic (PEC) processes with Escherichia coli K-12 as the model microorganism. The bacterial cells were found to be inactivated and decomposed primarily due to attack from photogenerated H2O2. Extracellular reactive oxygen species (ROSs), such as H2O2, may penetrate into the bacterial cell and cause dramatically elevated intracellular ROSs levels, which would overwhelm the antioxidative capacity of bacterial protective enzymes such as superoxide dismutase and catalase. The activities of these two enzymes were found to decrease due to the ROSs attacks during PEC inactivation. Bacterial cell wall damage was then observed, including loss of cell membrane integrity and increased permeability, followed by the decomposition of cell envelope (demonstrated by scanning electronic microscope images). One of the bacterial building blocks, protein, was found to be oxidatively damaged due to the ROSs attacks, as well. Leakage of cytoplasm and biomolecules (bacterial building blocks such as proteins and nucleic acids) were evident during prolonged PEC inactivation process. The leaked cytoplasmic substances and cell debris could be further degraded and, ultimately, mineralized with prolonged PEC treatment.
Efficient electrocatalytic nitrogen reduction to ammonia with aqueous silver nanodots
Publisher: Springer Science and Business Media LLC
Date: 29-01-2021
DOI: 10.1038/S42004-021-00449-7
Abstract: The electrocatalytic nitrogen (N 2 ) reduction reaction (NRR) relies on the development of highly efficient electrocatalysts and electrocatalysis systems. Herein, we report a non-loading electrocatalysis system, where the electrocatalysts are dispersed in aqueous solution rather than loading them on electrode substrates. The system consists of aqueous Ag nanodots (AgNDs) as the catalyst and metallic titanium (Ti) mesh as the current collector for electrocatalytic NRR. The as-synthesized AgNDs, homogeneously dispersed in 0.1 M Na 2 SO 4 solution (pH = 10.5), can achieve an NH 3 yield rate of 600.4 ± 23.0 μg h −1 mg Ag −1 with a faradaic efficiency (FE) of 10.1 ± 0.7% at −0.25 V (vs. RHE). The FE can be further improved to be 20.1 ± 0.9% at the same potential by using Ti mesh modified with oxygen vacancy-rich TiO 2 nanosheets as the current collector. Utilizing the aqueous AgNDs catalyst, a Ti plate based two-electrode configured flow-type electrochemical reactor was developed to achieve an NH 3 yield rate of 804.5 ± 30.6 μg h −1 mg Ag −1 with a FE of 8.2 ± 0.5% at a voltage of −1.8 V. The designed non-loading electrocatalysis system takes full advantage of the AgNDs’ active sites for N 2 adsorption and activation, following an alternative hydrogenation mechanism revealed by theoretical calculations.
Autism spectrum disorders: Neuroimaging findings from systematic reviews
Publisher: Elsevier BV
Date: 02-2017
The role and synergistic effect of the light irradiation and H2O2 in photocatalytic inactivation of Escherichia coli
Publisher: Elsevier BV
Date: 08-2015
DOI: 10.1016/J.JPHOTOBIOL.2015.06.007
Abstract: Inactivation of Escherichia coli K-12 was conducted by applying a continuous supplying of commercial H2O2 to mimic the H2O2 production in a photocatalytic system, and the contribution of H2O2 in photocatalytic inactivation was investigated using a modified "partition system" and five E. coli mutants. The concentration of exogenous H2O2 required for complete inactivation of bacterial cells was much higher than that produced in-situ in common photocatalytic system, indicating that H2O2 alone plays a minor role in photocatalytic inactivation. However, the concentration of exogenously produced H2O2 required for effective inactivation of E. coli K-12 was much lower when the light irradiation was applied. To further investigate the possible physiological changes, inactivation of E. coli BW25113 (the parental strain), and its corresponding isogenic single-gene deletion mutants with light pretreatment was compared. The results indicate that light irradiation increases the bacterial intracellular Fe(2+) level and favors hydroxyl radical (OH) production via the catalytic reaction of Fe(2+), leading to increase in DNA damage. Moreover, the results indicate that the properties of light source, such as intensity and major emission wavelength, may alter the physiology of bacterial cells and affect the susceptibility to in-situ resultant H2O2 in the photocatalytic inactivation processes, leading to significant influence on the photocatalytic inactivation efficiencies of E. coli K-12.
Multi-shelled metal oxides prepared via an anion-adsorption mechanism for lithium-ion batteries (vol 1, 16050, 2016)
Publisher: Springer Science and Business Media LLC
Date: 11-05-2016
Titania single crystals with a curved surface
Publisher: Springer Science and Business Media LLC
Date: 06-11-2014
DOI: 10.1038/NCOMMS6355
Abstract: Owing to its scientific and technological importance, crystallization as a ubiquitous phenomenon has been widely studied over centuries. Well-developed single crystals are generally enclosed by regular flat facets spontaneously to form polyhedral morphologies because of the well-known self-confinement principle for crystal growth. However, in nature, complex single crystalline calcitic skeleton of biological organisms generally has a curved external surface formed by specific interactions between organic moieties and biocompatible minerals. Here we show a new class of crystal surface of TiO₂, which is enclosed by quasi continuous high-index microfacets and thus has a unique truncated biconic morphology. Such single crystals may open a new direction for crystal growth study since, in principle, crystal growth rates of all facets between two normal {101} and {011} crystal surfaces are almost identical. In other words, the facet with continuous Miller index can exist because of the continuous curvature on the crystal surface.
Moderate and late preterm infants exhibit widespread brain white matter microstructure alterations at term-equivalent age relative to term-born controls
Publisher: Springer Science and Business Media LLC
Date: 05-03-2015
DOI: 10.1007/S11682-015-9361-0
Abstract: Despite the many studies documenting cerebral white matter microstructural alterations associated with very preterm birth (<32 weeks' gestation), there is a dearth of similar research in moderate and late preterm infants (born 32-36 weeks' gestation), who experience higher rates of neurodevelopmental delays than infants born at term (≥ 37 weeks' gestation). We therefore aimed to determine whether whole brain white matter microstructure differs between moderate and late preterm infants and term-born controls at term-equivalent age, as well as to identify potential perinatal risk factors for white matter microstructural alterations in moderate and late preterm infants. Whole brain white matter microstructure was studied in 193 moderate and late preterm infants and 83 controls at term-equivalent age by performing Tract-Based Spatial Statistics analysis of diffusion tensor imaging data. Moderate and late preterm infants had lower fractional anisotropy and higher mean, axial and radial diffusivities compared with controls in nearly 70% of the brain's major white matter fiber tracts. In the moderate and late preterm group, being born small for gestational age and male sex were associated with lower fractional anisotropy, largely within the optic radiation, corpus callosum and corona radiata. In conclusion, moderate and late preterm infants exhibit widespread brain white matter microstructural alterations compared with controls at term-equivalent age, in patterns consistent with delayed or disrupted white matter microstructural development. These findings may underpin some of the neurodevelopmental delays observed in moderate and late preterm children.
Enhancement of the visible-light photocatalytic activity of CeO2 by chemisorbed oxygen in the selective oxidation of benzyl alcohol
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NJ01098J
Abstract: Enriched chemisorbed oxygen on CeO 2 significantly improved the activity of photocatalytic oxidation of benzyl alcohol under visible light.
Geometric structure of rutile titanium dioxide (111) surfaces
Publisher: American Physical Society (APS)
Date: 10-07-2014
One pot microwave-assisted synthesis of Ag decorated yolk@shell structured TiO2 microspheres
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA14675A
Abstract: A facile and extremely fast one-pot microwave-assisted synthesis of Ag decorated yolk@shell structured TiO 2 microspheres was reported.
Metagenomic profiles and health risks of pathogens and antibiotic resistance genes in various industrial wastewaters and the associated receiving surface water
Publisher: Elsevier BV
Date: 11-2021
Highly Dispersed Copper Nanoparticles Supported on Activated Carbon as an Efficient Catalyst for Selective Reduction of Vanillin
Publisher: Wiley
Date: 29-07-2018
Abstract: Highly dispersed copper nanoparticles (Cu NPs) supported on activated carbon (AC) are effectively synthesized by one-pot carbothermal method at temperature range of 400-700 °C. The X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and Brunauer-Emmett-Teller analysis reveal that Cu NPs with diameters of 20-30 nm are evenly anchored in carbon matrix. The 15 wt%-Cu/AC-600 catalyst (derived at 600 °C) exhibits best bifunctional catalysis of aqueous-phase hydrodeoxygenation (HDO) and organic-phase transfer-hydrogenation reaction (THR) to selectively transform vanillin to 2-methoxy-4-methylphenol (MMP). In HDO of vanillin, the as-prepared catalyst achieves a 99.9% vanillin conversion and 93.2% MMP selectivity under 120 °C, 2.0 MPa H
Visible-light-driven inactivation of Escherichia coli K-12 over thermal treated natural pyrrhotite
Publisher: Elsevier BV
Date: 10-2015
Sulfonate group modified Ni catalyst for highly efficient liquid-phase selective hydrogenation of bio-derived furfural
Publisher: Elsevier BV
Date: 11-2018
Genome-scale characterization of RNA tertiary structures and their functional impact by RNA solvent accessibility prediction
Publisher: Cold Spring Harbor Laboratory
Date: 02-11-2017
Abstract: As most RNA structures are elusive to structure determination, obtaining solvent accessible surface areas (ASAs) of nucleotides in an RNA structure is an important first step to characterize potential functional sites and core structural regions. Here, we developed RNAsnap, the first machine-learning method trained on protein-bound RNA structures for solvent accessibility prediction. Built on sequence profiles from multiple sequence alignment (RNAsnap-prof), the method provided robust prediction in fivefold cross-validation and an independent test (Pearson correlation coefficients, r , between predicted and actual ASA values are 0.66 and 0.63, respectively). Application of the method to 6178 mRNAs revealed its positive correlation to mRNA accessibility by dimethyl sulphate (DMS) experimentally measured in vivo ( r = 0.37) but not in vitro ( r = 0.07), despite the lack of training on mRNAs and the fact that DMS accessibility is only an approximation to solvent accessibility. We further found strong association across coding and noncoding regions between predicted solvent accessibility of the mutation site of a single nucleotide variant (SNV) and the frequency of that variant in the population for 2.2 million SNVs obtained in the 1000 Genomes Project. Moreover, mapping solvent accessibility of RNAs to the human genome indicated that introns, 5′ cap of 5′ and 3′ cap of 3′ untranslated regions, are more solvent accessible, consistent with their respective functional roles. These results support conformational selections as the mechanism for the formation of RNA–protein complexes and highlight the utility of genome-scale characterization of RNA tertiary structures by RNAsnap. The server and its stand-alone downloadable version are available at sparks-lab.org .
Engineering the band gap of bare titanium dioxide materials for visible-light activity: a theoretical prediction
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA40239H
Cortical activation associated with the experience of auditory hallucinations and perception of human speech in schizophrenia: A PET correlation study
Publisher: Elsevier BV
Date: 04-2003
Hierarchical iron containing c-MnO2 hollow microspheres: A facile one-step synthesis and effective removal of As(III) via oxidation and adsorption
Publisher: Elsevier BV
Date: 10-2016
Enhanced removal of trace Cr(VI) from neutral and alkaline aqueous solution by FeCo bimetallic nanoparticles
Publisher: Elsevier BV
Date: 06-2016
DOI: 10.1016/J.JCIS.2016.03.025
Abstract: The reactivity of zero valent iron (Fe(0)) for removing Cr(VI) is self-inhibiting under neutral and alkaline conditions, due to the precipitation of ferrous hydroxide on the surface of Fe(0). To overcome this difficulty, we incorporated a second metal (Co) into Fe(0) to form FeCo bimetallic nanoparticles (FeCo BNPs), which can achieve higher activity and significant improvement in the reaction kinetics for the removal of Cr(VI) compared with Fe(0). The FeCo BNPs were synthesized by a hydrothermal reduction method without using any templates. The characterization analysis indicated that the products were highly uniform in large scale with 120-140 nm size in diameter. The obtained FeCo BNPs exhibited a remarkable removal ability for Cr(VI) in the pH range of 5.3-10.0. Especially, FeCo BNPs were able to reduce trace Cr(VI) (1.0 mg L(-1), pH=7.5) down to about 0.025 mg L(-1) within 1h. XPS analysis confirmed that Cr(VI) was reduced to Cr(III) by FeCo BNPs, while Fe and Co was oxidized, implying a chemical reduction process. The enhanced removal of trace Cr(VI) could be originated from the introduction of Co, which not only served as a protecting agent against surface corrosion by galvanic cell effect, but also enhanced the efficient flow of electron transfer between iron and Cr(VI). All the results primarily imply that FeCo BNPs can be employed as high efficient material for wastewater treatment.
Engineering Hybrid Guided Modes in Subwavelength Uniaxial Metamaterial Waveguides
Publisher: Springer Science and Business Media LLC
Date: 23-05-2017
Efficiency of structural connectivity networks relates to intrinsic motivation in children born extremely preterm
Publisher: Springer Science and Business Media LLC
Date: 30-06-2018
DOI: 10.1007/S11682-018-9918-9
Abstract: Intrinsic motivation is essential for academic success and cognitive growth, but limited work has examined the neuroanatomical underpinnings of intrinsic motivation from a network perspective, particularly in early childhood. Using graph theoretical analysis, this study investigated global and local properties of structural connectivity networks in relation to intrinsic motivation within a vulnerable group of children at early school age. Fifty-three 7 year-old children born extremely preterm (<28 weeks' gestational age)/extremely low birth weight (<1000 g) underwent T1 and diffusion weighted imaging. Structural connectivity networks were generated using 162 cortical and subcortical nodes, and edges were created using constrained spherical deconvolution-based tractography. Global and node-specific network measures were analyzed in association with self-reported aspects of intrinsic motivation for school learning (Mastery, Challenge and Curiosity) using linear regression. Results indicated that increased information transfer across the network was associated with greater Mastery, while increased clustering and small-world topology related to greater Challenge. Increased efficiency and connection strength of the striatum in particular, related to greater intrinsic motivation. These findings suggest that both integrated and segregated network communication support aspects of intrinsic motivation in childhood, and shed new light on structural network properties important for intrinsic motivation orientations in extremely preterm children at early school age.
Ensembles of Photonic Beads: Optical Properties and Enhanced Light—Matter Interactions
Publisher: Wiley
Date: 22-01-2020
Hydrogen Spillover in Electrochemical Hydrogen Evolution Reaction
Publisher: Yaoyi International Publishing
Date: 2022
A Yolk–Shell Structured Silicon Anode with Superior Conductivity and High Tap Density for Full Lithium‐Ion Batteries
Publisher: Wiley
Date: 20-05-2019
Microbial dynamics during the decline of a spring diatom bloom in the Northeast Atlantic
Publisher: Oxford University Press (OUP)
Date: 04-12-2007
A Recyclable Mineral Catalyst for Visible-Light-Driven Photocatalytic Inactivation of Bacteria: Natural Magnetic Sphalerite
Publisher: American Chemical Society (ACS)
Date: 23-09-2013
DOI: 10.1021/ES402170B
Abstract: Motivated by recent studies that well-documented mineral photocatalyst for bacterial inactivation, a novel natural magnetic sphalerite (NMS) in lead-zinc deposit was first discovered and evaluated for its visible-light-driven (VLD) photocatalytic bactericidal properties. Superior to the reference natural sphalerite (NS), vibrating s ling magnetometeric (VSM) analysis revealed the ferromagnetic property of NMS, indicating its potential for easy separation after use. Under the irradiation of fluorescence tubes, NMS could inactivate 7 log10 Gram-negative Escherichia coli K-12 without any regrowth and metal ions leached out from NMS show no toxicity to cells. The cell destruction process starting from cell wall to intracellular components was verified by TEM. Some products from damaged cells such as aldehydes, ketones and carboxylic acids were identified by FTIR with a decrease of cell wall functional groups. The relative amounts of potassium ion leakage from damaged cells gradually increased from initial 0 to approximately constant concentration of 1000 ppb with increasing reaction time. Superoxide radical (•O2(-)) rather than hydroxyl radical (•OH) was proposed to be the primary reactive oxidative species (ROSs) responsible for E. coli inactivation by use of probes and electron spin resonance (ESR). H2O2 determined by fluorescence method is greatly involved in bacterial inactivation in both nonpartition and partition system. Multiple cycle runs revealed excellent stability of recycled NMS without any significant loss of activity. This study provides a promising natural magnetic photocatalyst for large-scale bacterial inactivation, as NMS is abundant, easily recycled and possessed an excellent VLD bacterial inactivation ability.
α-Fe2O3 Multi-Shelled Hollow Microspheres for Lithium Ion Battery Anodes with Superior Capacity and Charge Retention
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3EE43319F
Facet-Dependent Catalytic Activity of Platinum Nanocrystals for Triiodide Reduction in Dye-Sensitized Solar Cells
Publisher: Springer Science and Business Media LLC
Date: 14-05-2013
DOI: 10.1038/SREP01836
Synthesis of multi-shelled MnO2 hollow microspheres via an anion-adsorption process of hydrothermal intensification
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6QI00083E
Abstract: Multi-shelled manganese oxide hollow microspheres can be synthesized via an anion-adsorption process of hydrothermal intensification with controlled valence and shell number.
Flow-electrode capacitive deionization utilizing three-dimensional foam current collector for real seawater desalination
Publisher: Elsevier BV
Date: 07-2022
DOI: 10.1016/J.WATRES.2022.118642
Abstract: The three-dimensional (3D) carbon coated nickel foam was utilized as current collector in a flow-electrode capacitive deionization (CF-FCDI) device to strengthen the charge transfer ability of FCDI device, achieving distinguished desalination efficiency for real seawater. Utilizing 30 ppi carbon coated nickel foam as current collector with 12.5 wt% AC content at 1.2 V to treat 3.5 g L
Optimization of diesel engine performance and emission parameters employing cassia tora methyl esters-response surface methodology approach
Publisher: Elsevier BV
Date: 02-2019
Study protocol: Families and childhood transitions study (FACTS) - a longitudinal investigation of the role of the family environment in brain development and risk for mental health disorders in community based children
Publisher: Springer Science and Business Media LLC
Date: 30-06-2017
Ultrathin Nitrogen-Doped Holey Carbon@Graphene Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions in Alkaline and Acidic Media
Publisher: Wiley
Date: 14-11-2018
Abstract: Efficient nonprecious-metal oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electrocatalysts are key for the commercial viability of fuel cells, metal-air batteries, and water-splitting systems. Thus, high-performance ORR and OER electrocatalysts in acidic electrolytes are needed to support high-efficiency proton exchange membrane (PEM)-based systems. Herein, we report a new approach to design and prepare an ultrathin N-doped holey carbon layer (HCL) on a graphene sheet that exhibits outstanding bifunctional ORR/OER activities in both alkaline and acidic media. The edge sites of HCL are utilized to achieve selective doping of highly active pyridinic-N. The sandwiched graphene sheet provides mechanical support, stabilizes HCL structure and promotes charge transfer. The synergetic effect of the catalyst structure overcomes the drawbacks of holey graphene approaches. The resulting ORR and OER performances are equal to or better than the top-ranked electrocatalysts.
Comparative study of visible-light-driven photocatalytic inactivation of two different wastewater bacteria by natural sphalerite
Publisher: Elsevier BV
Date: 12-2013
Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate
Publisher: American Chemical Society (ACS)
Date: 21-08-2020
Electrocatalytically Active Fe‐(O‐C2)4 Single‐Atom Sites for Efficient Reduction of Nitrogen to Ammonia
Publisher: Wiley
Date: 27-05-2020
Ferricyanide-Mediated Microbial Reactions for Environmental Monitoring
Publisher: CSIRO Publishing
Date: 2005
DOI: 10.1071/CH05038
Abstract: The ability of microorganisms to use ferricyanide as an alternative electron acceptor for respiratory processes has been known for nearly 100 years. More recently, the use of ferricyanide-mediated bioreactions for environmental monitoring has received much attention. This paper reviews the recent developments of these mediated microbial processes for rapid biochemical oxygen demand analysis and direct toxicity assessment during the past five years. The ability of eukaryotic microorganisms to use ferricyanide as an alternative electron acceptor for a range of applications is also described.
Facile Fabrication of Anatase TiO2 Microspheres on Solid Substrates and Surface Crystal Facet Transformation from {001} to {101}
Publisher: Wiley
Date: 08-04-2011
Abstract: Anatase TiO(2) microspheres with controlled surface morphologies and exposed crystal facets were directly synthesized on metal titanium foil substrates by means of a facile, one-pot hydrothermal method without use of any templating reagent. The obtained products were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelecron spectroscopy (XPS), and the focused ion beam (FIB) technique. The sizes of the resultant microspheres ranged from 1.1 to 2.1 μm. The transformation of anatase TiO(2) microspheres with exposed {001} facets surface to nanosheets surface with {101} facets was achieved by simply controlling the hydrothermal reaction time. The anatase TiO(2) microspheres with exposed square-shaped plane {001} facets were obtained by controlling the reaction time at 1 h. The prolonged reaction time transforms the anatase TiO(2) microspheres with exposed square-shaped plane {001} facets to eroded {001} facets then to a nanosheet surface with exposed {101} facets. With hydrothermal synthesis, the surface morphological structure and crystal facets formation are highly dependent on dissolution/deposition processes, which can be strongly influenced by attributes, such as pH of the reaction media, the total concentration of dissolved and suspended titanium species, and the concentration of fluoride in the reaction solution. The changes of these attributes during the hydrothermal process were therefore measured and used to illustrate the morphology and crystal-facet transformation processes of anatase TiO(2) microspheres. The surface morphologies and crystal-facet transformations during hydrothermal processes were found to be governed by the compositional changes of the reaction media, driven by dynamically shifted dissolution/deposition equilibria. The photocatalytic activities of the photoanodes made of anatase TiO(2) microspheres were evaluated. The experimental results demonstrated that the photocatalytic activity of anatase TiO(2) microspheres with exposed {001} facets was found to be 1.5 times higher than that of the anatase TiO(2) microspheres with exposed {101} facets.
pH‐Regulated Synthesis of Multi‐Shelled Manganese Oxide Hollow Microspheres as Supercapacitor Electrodes Using Carbonaceous Microspheres as Templates
Publisher: Wiley
Date: 12-2014
2D-2D Heterostructured UNiMOF/g-C 3 N 4 for Enhanced Photocatalytic H 2 Production under Visible-Light Irradiation
Publisher: American Chemical Society (ACS)
Date: 27-12-2019
Broad-spectrum resistance loci for three quantitatively inherited diseases in two winter wheat populations
Publisher: Springer Science and Business Media LLC
Date: 20-05-2012
A biofilm reactor-based approach for rapid on-line determination of biodegradable organic pollutants
Publisher: Elsevier BV
Date: 04-2012
DOI: 10.1016/J.BIOS.2012.01.020
Abstract: A new analytical approach utilizing a biofilm reactor (BFR) for rapid online determination of biochemical oxygen demand (BOD) was proposed and experimentally validated. The BFR was fabricated via a cultivation process using naturally occurring microbial seeds from locally collected wastewaters. The resultant BFR displays a remarkable rate of biodegradation towards a wide spectrum of organic substrates, capable of degrading over 20% of biodegradable organic substrates within 100 s. More importantly, the BFR exhibits a superior indiscriminative biodegradation feature, enabling a precise prediction of BOD values of total biodegradable organics based on experimentally determined BOD values from partial degradation processes without a need for on-going calibration. The proposed approach was systematically validated using a range of in idual organic substrates, their mixtures, synthetic s les and wastewaters. Highly significant linear correlations between the BFR and the standard BOD(5) methods were obtained from ersified synthetic s les (r=0.988, p=0.000, n=45) and wastewaters (r=0.983, p=0.000, n=40). Near unity slope values of the principal axis of the correlation ellipse were obtained from all tested s les, suggesting both methods were essentially measuring the same BOD value. The reported method could be a useful online monitoring tool for determination of biodegradable organic pollutants.
Operando reconstruction-induced CO2 reduction activity and selectivity for cobalt-based photocatalysis
Publisher: Springer Science and Business Media LLC
Date: 23-01-2023
Timing of covert articulation: An fMRI study
Publisher: Elsevier BV
Date: 2006
DOI: 10.1016/J.NEUROPSYCHOLOGIA.2006.04.005
Abstract: Timing is an important constituent of speech and language. Different brain regions have been associated with time management functions such as time estimation and motor timing. This study aims to identify the less well known neural networks associated with timing of internally paced covert articulation. Functional MRI was performed on subjects who either spontaneously, or in response to a visual cue, covertly generated words every 2 s. Results show the involvement of anterior cingulate gyrus, right dorsolateral and inferior frontal and right inferior parietal cortices in a putatively modality independent circuit associated with timing of covert speech. Modality specific activation in the right temporal cortex may have reflected the involvement of this region in auditory-verbal processing.
Reply to the 'Comment on Density functional theory analysis of structural and electronic properties of orthorhombic perovskite CH(3)NH(3)Pbl(3)' by J. Even et al., Phys. Chem. Chem. Phys., 2014, 10.1039/C3CP55006K
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4CP00595C
Abstract: Perovskite CH 3 NH 3 PbI 3 materials were theoretically investigated using density functional theory (DFT) since they are an important component in novel perovskite-based solar cells.
Brain structural connectivity during adrenarche: Associations between hormone levels and white matter microstructure
Publisher: Elsevier BV
Date: 02-2018
DOI: 10.1016/J.PSYNEUEN.2017.11.009
Abstract: Levels of the adrenal hormones dehydroepiandrosterone (DHEA), its sulfate (DHEAS), and testosterone, have all been linked to behavior and mental health during adrenarche, and preclinical studies suggest that these hormones influence brain development. However, little is known about how variation in these hormones is associated with white matter structure during this period of life. The current study aimed to examine associations between DHEA, DHEAS, and testosterone, and white matter microstructure during adrenarche. To avoid the confounding effect of age on hormone levels, we tested these associations in 87 children within a narrow age range (mean age 9.56 years, SD=0.34) but varying in hormone levels. All children provided saliva s les directly after waking and completed a diffusion-weighted MRI scan. Higher levels of DHEA were associated with higher mean diffusivity (MD) in a widespread cluster of white matter tracts, which was partially explained by higher radial diffusivity (RD) and partially by higher axial diffusivity (AD). In addition, there was an interaction between DHEA and testosterone, with higher levels of testosterone being associated with higher fractional anisotropy (FA) and lower MD and RD when DHEA levels were relatively high, but with lower FA and higher MD and RD when DHEA levels were low. These findings suggest that relatively early exposure to DHEA, as well as an imbalance between the adrenal hormones, may be associated with alterations in white matter microstructure. These findings highlight the potential relevance of adrenarcheal hormones for structural brain development.
Hydrothermal fabrication of rutile TiO2 submicrospheres on wood surface: An efficient method to prepare UV-protective wood
Publisher: Elsevier BV
Date: 03-2012
Photoelectrochemical determination of intrinsic kinetics of photoelectrocatalysis processes at {001} faceted anatase TiO2 photoanodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA15336G
Abstract: Intrinsic degradation kinetic constant of oxalic acid at a double layered anatase TiO 2 photoanode with dominantly exposed {001} facets.
Experimental and DFT investigations on adsorption–regeneration performance and deactivation mechanism over engineered carbon fiber: role of pore structure and functional groups
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EN00443K
Abstract: Porous carbon adsorption technology is a promising cost-effective strategy for high-value VOCs recovery or worthless VOCs removal. However, the deactivation mechanism of porous carbon adsorbents determined by pore structure and...
Ni–Co Alloy Nanoparticles Catalyze Selective Electrochemical Coupling of Nitroarenes into Azoxybenzene Compounds in Aqueous Electrolyte
Publisher: American Chemical Society (ACS)
Date: 14-02-2023
Synthesis and characterization of TiO2 nanotube photoanode and its application in photoelectrocatalytic degradation of model environmental pharmaceuticals
Publisher: Wiley
Date: 11-12-2013
DOI: 10.1002/JCTB.3992
Theoretical Understanding and Prediction of Lithiated Sodium Hexatitanates
Publisher: American Chemical Society (ACS)
Date: 02-2013
DOI: 10.1021/AM302907V
Abstract: Sodium hexatitanates (Na(2)Ti(6)O(13)) with tunnelled structures have been experimentally proposed to be good candidates for anode materials of lithium ion batteries because of their low potential, small shape transformation, and good reversibility. The understanding of the properties of this lithiated titanate is significant for their development. To this end, the first-principle calculations were performed to investigate the interaction between Li ions and Na(2)Ti(6)O(13) at the atomic level. After structural optimization with various Li:Ti ratios, the Li ions are found to energetically prefer to stay at the small rhombic tunnels of Na(2)Ti(6)O(13), where the diffusion energy barrier of Li ions is also lower. Such preference is determined by the chemical environment around Li ions. Our theoretical intercalation potential and volume change on the basis of the optimized atomic structures agree with the experimental observations. The analysis of the electronic properties reveals the Burstein-Moss effect in lithiated Na(2)Ti(6)O(13) due to the heavy n-type doping. Such materials possess high conductivity, which can benefit their applications in photoelectrochemical or electrochemical areas.
Cobalt Covalent Doping in MoS2 to Induce Bifunctionality of Overall Water Splitting
Publisher: Wiley
Date: 28-05-2018
Abstract: The layer-structured MoS
A Hollow‐Shell Structured V2O5 Electrode‐Based Symmetric Full Li‐Ion Battery with Highest Capacity
Publisher: Wiley
Date: 04-07-2019
Membrane-based conductivity probe for real-time in-situ monitoring rice field ammonia volatilization
Publisher: Elsevier BV
Date: 05-2019
Optomechanically induced transparency in the mechanical-mode splitting regime
Publisher: The Optical Society
Date: 10-07-2014
DOI: 10.1364/OL.39.004180
Multi-shelled metal oxides prepared via an anion-adsorption mechanism for lithium-ion batteries
Publisher: Springer Science and Business Media LLC
Date: 29-04-2016
EFFECT OF THE COUNTERION EMPLOYED DURING SYNTHESIS ON THE PROPERTIES OF POLYPYRROLE MEMBRANES
Publisher: Elsevier BV
Date: 02-1994
In Situ Growth of Ultrathin Ni(OH)2 Nanosheets as Catalyst for Electrocatalytic Oxidation Reactions
Publisher: Wiley
Date: 09-06-2021
Abstract: Development of electrocatalysts that are capable of efficiently oxidizing biomass‐derived 5‐hydroxymethylfurfural (HMF) into 2,5‐furandicarboxylic acid (FDCA) is critically important for production of degradable plastics via non‐fossil routes. In this study, a facile and scalable immersion synthetic approach has been developed to grow ultrathin nickel hydroxide nanosheets in situ on commercial nickel foam (Ni(OH) 2 /NF) as an anode for the electrocatalytic oxidation of HMF to FDCA with complete HMF conversion, 100 % FDCA yield, and % faradaic efficiency at 1.39 V (vs. RHE) within 90 min. Mechanistic studies reveal that the initial oxidation of HMF takes place at the carbonyl group and FDCA is generated through two further oxidation steps. Impressively, the synthesized Ni(OH) 2 /NF can also be used to electrocatalytically oxidize other alcohol/aldehyde‐containing compounds to the targeted products in alkaline medium with 100 % yield and % faradaic efficiency under a low oxidation potential of 1.39 V (vs. RHE) within short reaction times.
Photocatalytic ozonation inactivation of bioaerosols by NiFeOOH nanosheets in situ grown on nickel foam
Publisher: Elsevier BV
Date: 05-2023
Poro-Elasto-Plastic Model for the Wave-Induced Liquefaction
Publisher: ASME International
Date: 08-2015
DOI: 10.1115/1.4030201
Abstract: In this paper, we presented an integrated numerical model for the wave-induced pore pressures in marine sediments. Two mechanisms of the wave-induced pore pressures were considered. Both elastic components (for oscillatory) and the plastic components (for residual) were integrated to predict the wave-induced excess pore pressures and liquefaction in marine sediments. The proposed two-dimensional (2D) poro-elasto-plastic model can simulate the phenomenon of the pore pressure buildup and dissipation process in a sandy seabed. The proposed model overall agreed well with the previous wave experiments and geo-centrifuge tests. Based on the parametric study, first, we examined the effects of soil and wave characteristics on the pore pressure accumulations and residual liquefaction. Then, a set of analysis on liquefaction potential was presented to show the development of liquefaction zone. Numerical ex le shows that the pattern of progressive waves-induced liquefaction gradually changes from 2D to one-dimensional (1D), while the standing wave-induced liquefaction stays in a 2D pattern in the whole process.
Bifunctional NH2-MIL-88(Fe) metal–organic framework nanooctahedra for highly sensitive detection and efficient removal of arsenate in aqueous media
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA07934F
Abstract: Bifunctional NH 2 -MIL-88(Fe) nanooctahedra have been successfully fabricated for highly sensitive and specific recognition as well as efficient removal of arsenate.
Stable Seamless Interfaces and Rapid Ionic Conductivity of Ca–CeO2/LiTFSI/PEO Composite Electrolyte for High‐Rate and High‐Voltage All‐Solid‐State Battery
Publisher: Wiley
Date: 15-04-2020
Ru(bpy)32+-sensitized {001} facets LiCoO2 nanosheets catalyzed CO2 reduction reaction with 100% carbonaceous products
Publisher: Springer Science and Business Media LLC
Date: 10-07-2021
Corrigendum to “Interaction between bacterial cell membranes and nano-TiO2 revealed by two-dimensional FTIR correlation spectroscopy using bacterial ghost as a model cell envelope” [Water Res. 118 (20
Publisher: Elsevier BV
Date: 02-2018
Naturally Occurring Sphalerite As a Novel Cost-Effective Photocatalyst for Bacterial Disinfection under Visible Light
Publisher: American Chemical Society (ACS)
Date: 14-06-2011
DOI: 10.1021/ES200778P
Abstract: The photocatalytic disinfection capability of the natural semiconducting mineral sphalerite is studied here for the first time. Natural sphalerite can completely inactivate 1.5 × 10(7) cfu/mL E. coli K-12 within 6 h under visible light irradiation. The photocatalytic disinfection mechanism of natural sphalerite is investigated using multiple scavengers. The critical role that electrons play in bactericidal actions is experimentally demonstrated. The involvement of H(2)O(2) in photocatalytic disinfection is also confirmed using a partition system combined with different scavengers. Moreover, the photocatalytic destruction of bacterial cells is observed through transmission electron microscopic analysis. A catalase activity study reveals that antioxidative enzyme activity is high in the initial stage of photocatalytic disinfection but decreases with time due to damage to enzymatic functioning. Natural sphalerite is abundant and easy to obtain and possesses excellent visible-light photocatalytic activity. These superior properties make it a promising solar-driven photocatalyst for large-scale cost-effective wastewater treatment.
Photocatalytic and photoelectrocatalytic degradation of small biological compounds at TiO2 photoanode: A case study of nucleotide bases
Publisher: Elsevier BV
Date: 03-2015
Unraveling Two-Photon Entanglement via the Squeezing Spectrum of Light Traveling through Nanofiber-Coupled Atoms
Publisher: American Physical Society (APS)
Date: 14-09-2021
Brain volumetric correlates of inhibition and cognitive flexibility 16 years following childhood traumatic brain injury
Publisher: Wiley
Date: 04-07-2018
DOI: 10.1002/JNR.24087
Abstract: Executive functions (EFs), such as inhibition and cognitive flexibility, are essential for everyday functioning, including regulation of socially appropriate emotional responses. These skills develop during childhood and continue maturing into early adulthood. The current study aimed to investigate the very long-term impact of childhood traumatic brain injury (TBI) on inhibition and cognitive flexibility, and to examine whether global white matter is associated with these abilities. Twenty-eight young adult survivors of childhood TBI (mean age at 16-year follow-up = 21.67 years, SD = 2.70) and 16 typically developing controls (TDCs), group-matched for age, sex, and socioeconomic status, completed tests of inhibition and cognitive flexibility and underwent structural MRI. Survivors of childhood TBI did not significantly differ from TDCs on EF or white matter volume. However, the relationship between EF and white matter volume differed between survivors of TBI and TDCs. Survivors of TBI did not mimic the brain behavior relationship that characterized EF in TDCs. The inverse brain behavior relationship, exhibited by childhood TBI survivors, suggests disruptions in the whole brain underpinning EF following childhood TBI.
Single crystal α-Fe2O3 with exposed {104} facets for high performance gas sensor applications
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2RA20797D
Optimization synthesis of carbon nanotubes-anatase TiO2 composite photocatalyst by response surface methodology for photocatalytic degradation of gaseous styrene
Publisher: Elsevier BV
Date: 07-2012
Ferricyanide mediated biochemical oxygen demand - development of a rapid biochemical oxygen demand assay
Publisher: Elsevier BV
Date: 08-2001
Responses of the sugarcane rhizosphere microbiota to different levels of water stress
Publisher: Elsevier BV
Date: 03-2021
Effect of an intermediate on the amperometric response of a polypyrrole-based formate biosensing membrane
Publisher: Elsevier BV
Date: 2000
Accurate Control of Multishelled Co3O4 Hollow Microspheres as High‐Performance Anode Materials in Lithium‐Ion Batteries
Publisher: Wiley
Date: 06-05-2013
Fe/Fe2O3 nanoparticles anchored on Fe-N-doped carbon nanosheets as bifunctional oxygen electrocatalysts for rechargeable zinc-air batteries
Publisher: Springer Science and Business Media LLC
Date: 20-05-2016
Anatase TiO2 mesocrystals with exposed (001) surface for enhanced photocatalytic decomposition capability toward gaseous styrene
Publisher: Elsevier BV
Date: 04-2014
Experimental and theoretical understanding on electrochemical activation and inactivation processes of Nb3O7(OH) for ambient electrosynthesis of NH3
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA05155D
Abstract: Our experimental and theoretical calculation results revealed the electrochemical activation and inactivation processes of ultrafine Nb 3 O 7 (OH) nanoparticle catalysts for electrocatalytic N 2 reduction to produce NH 3 under ambient conditions.
Parameters influencing transport across conducting electroactive polymer membranes
Publisher: Elsevier BV
Date: 10-1996
Fabrication of high stable metal oxide hollow nanospheres and their catalytic activity towards 4-nitrophenol reduction
Publisher: American Chemical Society (ACS)
Date: 17-05-2017
Abstract: In this paper, hollow nanospheres (HNSs) of metal oxides (NiO, CuO, and NiO/CuO) coated with a porous carbon shell (HNSs@C) with good structural stability were successfully prepared on the basis of the nanoscale Kirkendall effect. The formation process was based on a template-free method, and the as-prepared HNSs@C are very clean compared with products of the template process. In addition, the results of N
Functional connectivity in brain networks underlying cognitive control in chronic cannabis users
Publisher: Springer Science and Business Media LLC
Date: 25-04-2012
DOI: 10.1038/NPP.2012.39
Vapor‐Phase Hydrothermal Growth of Novel Segmentally Configured Nanotubular Crystal Structure
Publisher: Wiley
Date: 16-04-2013
Abstract: A new form of nanotubular crystal structure is directly grown by a vapor-phase hydrothermal method via an epitaxial orientated crystal growth mechanism. The as-prepared nanotubes possess a unique multi-tunnel core-shell layered nanotubular structure with droplet shaped polygonal periphery and segmental crystal configuration. They are dimension-tunable and demonstrate superior ion exchange properties in terms of exchange rate and ion accommodating capacity.
A highly crystalline Nb3 O7 F nanostructured photoelectrode: Fabrication and photosensitisation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA11042G
Self-assembled Pd/CeO2 catalysts by a facile redox approach for high-efficiency hydrogenation of levulinic acid into gamma-valerolactone
Publisher: Elsevier BV
Date: 04-2017
Structural Transformation, Photocatalytic, and Field-Emission Properties of Ridged TiO2 Nanotubes
Publisher: American Chemical Society (ACS)
Date: 06-04-2011
DOI: 10.1021/AM200152B
Abstract: Self-organized, freestanding TiO(2) nanotube arrays with ridged structures have been fabricated using a one-step anodic oxidation method. Their structural, photocatalytic, and field-emission (FE) properties have systematically been investigated. The as-synthesized nanostructures have been characterized using XRD, Raman spectroscopy, SEM, and HRTEM. The experimental results show that after an annealing process, the starting amorphous nanotubes have been turned into anatase phase structures, and the tube walls have been decorated with nanoparticles, different from the original ridged nanotubes. Furthermore, the anatase phase nanotubes have demonstrated better photocatalytic properties than their amorphous counterparts, which is caused by the larger surface area and improved crystallinity. With respect to FE properties, the as-grown nanotubes have the lower turn-on field E(to) and the higher field enhancement factor β compared to the annealed nanotubes. The relationship between E(to), β, and the tube arrangements and morphologies has also been discussed.
Core shell hetero-structured SiO2@Ni/SiO2 catalyst for efficient aqueous-phase hydrogenation of bio-derived unsaturated compounds
Publisher: Elsevier BV
Date: 06-2022
Reply to “Comment on Rapid Photoelectrochemical Method for in Situ Determination of Effective Diffusion Coefficient of Organic Compounds”
Publisher: American Chemical Society (ACS)
Date: 22-05-2009
DOI: 10.1021/JP900773T
Novel TiO2 thin film with non-UV activated superwetting and antifogging behaviours
Publisher: Royal Society of Chemistry (RSC)
Date: 2007
DOI: 10.1039/B618280A
Fluorine-Doped Porous Single-Crystal Rutile TiO2 Nanorods for Enhancing Photoelectrochemical Water Splitting
Publisher: Wiley
Date: 24-07-2014
Abstract: Fluorine-doped hierarchical porous single-crystal rutile TiO(2) nanorods have been synthesized through a silica template method, in which F(-) ions acts as both n-type dopants and capping agents to make the isotropic growth of the nanorods. The combination of high crystallinity, abundant surface reactive sites, large porosity, and improved electronic conductivity leads to an excellent photoelectrochemical activity. The photoanode made of F-doped porous single crystals displays a remarkably enhanced solar-to-hydrogen conversion efficiency (≈0.35 % at -0.33 V vs. Ag/AgCl) under 100 mW cm(-2) of AM=1.5 solar simulator illumination that is ten times of the pristine solid TiO(2) single crystals.
Regional Brain Morphometric Characteristics of Nonsyndromic Cleft Lip and Palate
Publisher: S. Karger AG
Date: 2014
DOI: 10.1159/000365389
Abstract: Nonsyndromic cleft lip and palate (NSCLP) encompasses a group of orofacial abnormalities. Emerging evidence has revealed the presence of structural brain abnormalities in affected in iduals. Previous studies have performed structure-based volumetric analysis of the brain assessing gross lobular sub isions of the cerebral cortex and white matter which may have only vague relationships to the functional subregions implicated in behavioral and cognitive deficits observed in NSCLP patients. High-resolution magnetic resonance imaging structural data were acquired to provide a detailed characterization of the brain with respect to both regional cortical volume and thickness in 26 children with NSCLP and 26 age- and demographically matched typically developing children. Children with NSCLP exhibited abnormally large cerebral cortex grey matter volumes with decreased volumes of subcortical grey matter and cerebral white matter structures. Hemisphere-specific patterns of cortical volume and thickness abnormalities were identified. This study is the first to examine cortical thickness abnormalities in NSCLP. Overall, these findings suggest that the brains of children with NSCLP are less mature than those of their age-matched peers. Gender-specific comparisons reveal that NSCLP females were more immature compared to their typically developing peers compared to NSCLP males.
Molecular Biological Detection and Quantification of Novel Fibrobacter Populations in Freshwater Lakes
Publisher: American Society for Microbiology
Date: 08-2009
DOI: 10.1128/AEM.00701-09
Abstract: PCR and quantitative PCR (qPCR) primers targeting the 16S rRNA gene were used to detect and quantify members of the genus Fibrobacter in lake water, sediment and colonized cotton taken from two freshwater lakes. Phylogenetic analysis identified two groups of sequences those clustered with Fibrobacter succinogenes , the type species, and a defined cluster of clones loosely associated with several Fibrobacter sequences observed previously in clone libraries from freshwater environments. 16S rRNA gene sequences recovered in the same way from soil s les and ovine feces in the surrounding land were all F. succinogenes and did not include any from this group of the “freshwater” Fibrobacteres . In all cases, nested PCR was required to detect Fibrobacter 16S rRNA genes, and qPCR analysis of reverse transcribed bacterial community RNA confirmed their very low relative abundance on colonized cotton baits in the water column (at 0, 3, 7, 11, and 13 m) and on the sediment surface ( .02% of total bacterial rRNA). However, in Esthwaite Water sediment itself, the relative abundance of fibrobacters was 2 orders of magnitude higher (ca. 1% of total bacterial rRNA). The presence of fibrobacters, including the cellulolytic rumen species F. succinogenes , on colonized cellulose s les and in lake sediment suggests that these organisms may contribute to the primary degradation of plant and algal biomass in freshwater lake ecosystems.
Influence of the Timing of Cardiac Surgery on the Outcome of Patients With Infective Endocarditis and Stroke
Publisher: Oxford University Press (OUP)
Date: 16-10-2012
DOI: 10.1093/CID/CIS878
Abstract: The timing of cardiac surgery after stroke in infective endocarditis (IE) remains controversial. We examined the relationship between the timing of surgery after stroke and the incidence of in-hospital and 1-year mortalities. Data were obtained from the International Collaboration on Endocarditis-Prospective Cohort Study of 4794 patients with definite IE who were admitted to 64 centers from June 2000 through December 2006. Multivariate logistic regression and Cox regression analyses were performed to estimate the impact of early surgery on hospital and 1-year mortality after adjustments for other significant covariates. Of the 857 patients with IE complicated by ischemic stroke syndromes, 198 who underwent valve replacement surgery poststroke were available for analysis. Overall, 58 (29.3%) patients underwent early surgical treatment vs 140 (70.7%) patients who underwent late surgical treatment. After adjustment for other risk factors, early surgery was not significantly associated with increased in-hospital mortality rates (odds ratio, 2.308 95% confidence interval [CI], .942-5.652). Overall, probability of death after 1-year follow-up did not differ between 2 treatment groups (27.1% in early surgery and 19.2% in late surgery group, P = .328 adjusted hazard ratio, 1.138 95% CI, .802-1.650). There is no apparent survival benefit in delaying surgery when indicated in IE patients after ischemic stroke. Further observational analyses that include detailed pre- and postoperative clinical neurologic findings and advanced imaging data (eg, ischemic stroke size), may allow for more refined recommendations on the optimal timing of valvular surgery in patients with IE and recent stroke syndromes.
Hydrogen Peroxide Assisted Electrooxidation of Benzene to Phenol over Bifunctional Ni–(O–C2)4 Sites
Publisher: Wiley
Date: 30-10-2022
Abstract: Direct electrocatalytic oxidation of benzene has been regarded as a promising approach for achieving high‐value phenol product, but remaining a huge challenge. Here an oxygen‐coordinated nickel single‐atom catalyst (Ni–O–C) is reported with bifunctional electrocatalytic activities toward the two‐electron oxygen reduction reaction (2e − ORR) to H 2 O 2 and H 2 O 2 ‐assisted benzene oxidation to phenol. The Ni–(O–C 2 ) 4 sites in Ni–O–C ar proven to be the catalytic active centers for bifunctional 2e − ORR and H 2 O 2 ‐assisted benzene oxidation processes. As a result, Ni–O–C can afford a benzene conversion as high as 96.4 ± 3.6% with a phenol selectivity of 100% and a Faradaic efficiency (FE) of 80.2 ± 3.2% with the help of H 2 O 2 in 0.1 m KOH electrolyte at 1.5 V (vs RHE). A proof of concept experiment with Ni–O–C concurrently as cathode and anode in a single electrochemical cell demonstrates a benzene conversion of 33.4 ± 2.2% with a phenol selectivity of 100% and a FE of 44.8 ± 3.0% at 10 mA cm −2 .
Macroscale cobalt-MOFs derived metallic Co nanoparticles embedded in N-doped porous carbon layers as efficient oxygen electrocatalysts
Publisher: Elsevier BV
Date: 2017
Neonatal brain tissue classification with morphological adaptation and unified segmentation
Publisher: Frontiers Media SA
Date: 29-03-2016
Metal speciation measurement by diffusive gradients in thin films technique with different binding phases
Publisher: Elsevier BV
Date: 03-2005
Vapor-Phase Hydrothermal Transformation of HTiOF3 Intermediates into {001} Faceted Anatase Single-Crystalline Nanosheets
Publisher: Wiley
Date: 20-08-2012
Abstract: For the first time, a facile, one-pot hydrofluoric acid vapor-phase hydrothermal (HF-VPH) method is demonstrated to directly grow single-crystalline anatase TiO(2) nanosheets with 98.2% of exposed {001} faceted surfaces on the Ti substrate via a distinctive two-stage formation mechanism. The first stage produces a new intermediate crystal (orthorhombic HTiOF(3) ) that is transformed into anatase TiO(2) nanosheets during the second stage. The findings reveal that the HF-VPH reaction environment is unique and differs remarkably from that of liquid-phase hydrothermal processes. The uniqueness of the HF-VPH conditions can be readily used to effectively control the nanostructure growth.
An investigation of the relationship between cortical connectivity and schizotypy in the general population
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 05-2011
Portable Conductometric Sensing Probe for Real-Time Monitoring Ammonia Profile in Coastal Waters
Publisher: American Chemical Society (ACS)
Date: 02-10-2023
Density Functional Studies of Stoichiometric Surfaces of Orthorhombic Hybrid Perovskite CH3NH3PbI3
Publisher: American Chemical Society (ACS)
Date: 02-01-2015
DOI: 10.1021/JP511123S
Comparative study on the photoelectrocatalytic inactivation of Escherichia coli K-12 and its mutant Escherichia coli BW25113 using TiO2 nanotubes as a photoanode
Publisher: Elsevier BV
Date: 04-2014
Theoretical Understanding of Electrocatalytic Hydrogen Production Performance by Low-Dimensional Metal–Organic Frameworks on the Basis of Resonant Charge-Transfer Mechanisms
Publisher: American Chemical Society (ACS)
Date: 25-10-2019
A Portable Photoelectrochemical Probe for Rapid Determination of Chemical Oxygen Demand in Wastewaters
Publisher: American Chemical Society (ACS)
Date: 09-09-2009
DOI: 10.1021/ES901320A
Abstract: A photoelectrochemical probe for rapid determination of chemical oxygen demand (COD) is developed using a nanostructured mixed-phase TiO2 photoanode, namely PeCOD probe. A UV-LED light source and a USB mircroelectrochemical station are powered and controlled by a laptop computer, which makes the probe portable for onsite COD analyses. The photoelectrochemical measurement of COD was optimized in terms of light intensity, applied bias, and pH. Under the optimized conditions, the net steady state currents originated from the oxidation of organic compounds were found to be directly proportional to COD concentrations. A practical detection limit of 0.2 ppm COD and a linear range of 0-120 ppm COD were achieved. The analytical method using the portable PeCOD probe has the advantages of being rapid, low cost, robust, user-friendly, and environmental friendly. It has been successfully applied to determine the COD values of the synthetic s les consisting of potassium hydrogen phthalate, D-glucose, glutamic acid, glutaric acid, succinic acid, and malonic acid, and real s les from various industries, such as bakery, oil and grease manufacturer, poultry, hotel, fine food factory, and fresh food producer, commercial bread manufacturer. Excellent agreement between the proposed method and the conventional COD method (dichromate) was achieved.
In situ growth of α-Fe2O3 nanorod arrays on 3D carbon foam as an efficient binder-free electrode for highly sensitive and specific determination of nitrite
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6TA10744C
Abstract: 3D α-Fe 2 O 3 nanorod arrays (NAs)/carbon foam (CF) architectures have been successfully fabricated as binder-free electrodes for the determination of nitrite, exhibiting high sensitivity and excellent specific recognition as well as feasibility in real water s les.
The use of microorganisms with broad range substrate utilisation for the ferricyanide-mediated rapid determination of biochemical oxygen demand
Publisher: Elsevier BV
Date: 24-12-2001
DOI: 10.1016/S0039-9140(01)00527-6
Abstract: The feasibility of replacing oxygen with a synthetic electron acceptor in microbial catabolism was investigated as a rapid method for the determination of biochemical oxygen demand (BOD). Microorganisms known for their broad range organic substrate utilisation were investigated. It was shown that Trichosporon cutaneum, Pseudomonas putida and Bacillus licheniformis could utilize the ferricyanide ion as an alternative electron acceptor, in place of oxygen, for the catabolic oxidation of a range of simple organic compounds. The biochemical reactions were monitored by measuring the amount of microbially produced ferrocyanide using erometry at a Pt disk microelectrode. Catabolic degradation efficiencies approaching those of the conventional 5-day assay were achieved in 1 h. BOD(5) equivalent values for a range of simple organic solutions were determined for each of the microorganisms. The effect of increased incubation time and the choice of appropriate calibration standards for rapid BOD assays were also considered.
Photocatalytic and Photoelectrocatalytic Inactivation Mechanism of Biohazards
Publisher: Springer Berlin Heidelberg
Date: 22-11-2016
Correction to: Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities (Plant and Soil, (2018), 427, 1-2, (191-208), 10.1007/s11104-017-3391-x)
Publisher: Springer Science and Business Media LLC
Date: 02-12-2018
Hydrogen Spillover-Bridged Volmer/Tafel Processes Enabling Ampere-Level Current Density Alkaline Hydrogen Evolution Reaction under Low Overpotential
Publisher: American Chemical Society (ACS)
Date: 18-03-2022
DOI: 10.1021/JACS.2C01094
Abstract: Water-alkaline electrolysis holds a great promise for industry-scale hydrogen production but is hindered by the lack of enabling hydrogen evolution reaction electrocatalysts to operate at ere-level current densities under low overpotentials. Here, we report the use of hydrogen spillover-bridged water dissociation/hydrogen formation processes occurring at the synergistically hybridized Ni
Electrodeposition preparation of Ag loaded N-doped TiO2 nanotube arrays with enhanced visible light photocatalytic performance
Publisher: Elsevier BV
Date: 03-2011
Laser Irradiation in Liquid to Release Cobalt Single-Atom Sites for Efficient Electrocatalytic N2 Reduction
Publisher: American Chemical Society (ACS)
Date: 07-2020
Potential for Layered Double Hydroxides-Based, Innovative Drug Delivery Systems
Publisher: MDPI AG
Date: 29-04-2014
DOI: 10.3390/IJMS15057409
Allelopathic control of cyanobacterial blooms by periphyton biofilms
Publisher: Wiley
Date: 05-11-2010
DOI: 10.1111/J.1462-2920.2010.02363.X
Abstract: Periphyton biofilms are natural mixtures comprised of photoautotrophic and heterotrophic complex microorganisms. In this work, the inhibition effects of periphyton biofilms on cyanobacterial blooms were studied in pilot and field trials. Results show that the cyanobacterial species responsible for the blooms had an upper nutrient concentration threshold, below which it could not effectively compete with other organisms in the periphyton. The disappearance of the cyanobacterial blooms was due to the allelopathy between the cyanobacteria and periphyton biofilm. In particular, it was found that the periphyton biofilm could produce water-soluble allelochemicals such as indole and 3-oxo-α-ionone to significantly inhibit the growth of the cyanobacteria. These allelochemicals are able to damage the thylakoid membranes of the cyanobacteria, interrupt the electron transport in photosystem II, decrease effective quantum yields, and eventually lead to the failure of photosynthesis. A comprehensive discussion on the ecological consequences of these findings is also presented. This work demonstrates the potential of periphyton biofilm to be used as an environmentally friendly ecological engineering solution for (i) the control of cyanobacterial blooms and (ii) a transitional means for the construction of beneficial conditions for ecosystem restoration. In addition, this work provides significant insights into the competitive relationships between algae and biofilms.
Phosphorus and Sulfur Co‐Doped Cobaltous Oxide Synthesized by an Inorganic‐Salt‐Assisted Method: Reaction Mechanism and Electrocatalytic Application
Publisher: Wiley
Date: 07-2020
Metal-organic framework derived nitrogen-doped porous carbon@graphene sandwich-like structured composites as bifunctional electrocatalysts for oxygen reduction and evolution reactions
Publisher: Elsevier BV
Date: 09-2016
Photoelectrochemical manifestation of intrinsic photoelectron transport properties of vertically aligned {001} faceted single crystal TiO2 nanosheet films
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA08571C
Abstract: {001} faceted anatase TiO 2 nanosheet array films after calcination exhibited high photoelectrocatalytic activity toward water oxidation owing to superiorly intrinsic photoelectron transport properties of {001} faceted single crystal nanosheets.
A hierarchical hybrid monolith: MoS42−-intercalated NiFe layered double hydroxide nanosheet arrays assembled on carbon foam for highly efficient heavy metal removal
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA03102B
Abstract: A novel hierarchical hybrid monolith have been fabricated for highly efficient and selective heavy metal decontamination, accompanied by facile separation.
Low temperature solvothermal synthesis of anatase TiO2 single crystals with wholly {100} and {001} faceted surfaces
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM34880B
Age, sex, and puberty related development of the corpus callosum: a multi-technique diffusion MRI study
Publisher: Springer Science and Business Media LLC
Date: 05-04-2017
Hydroxyapatite nanoparticles in root cells: reducing the mobility and toxicity of Pb in rice
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7EN00953D
Abstract: Nano-hydroxyapatite (nHAP) has a high sorption capacity for alleviating Pb stress and restraining the translocation of Pb from roots to shoots.
2D Electrocatalysts for Converting Earth‐Abundant Simple Molecules into Value‐Added Commodity Chemicals: Recent Progress and Perspectives
Publisher: Wiley
Date: 10-2019
Development of brain networks and relevance of environmental and genetic factors: A systematic review
Publisher: Elsevier BV
Date: 12-2016
DOI: 10.1016/J.NEUBIOREV.2016.08.024
Abstract: This study conducted a systematic review to synthesize findings on the development of functional and structural brain networks from the prenatal to late adolescent period. In addition, evidence for environmental and genetic influences on the development of brain networks was reviewed. Ninety two studies fulfilled the inclusion criteria. Diffusion MRI findings indicated that clustering decreases, local and global efficiency increase and modularity stabilizes or decreases with age. Structural covariance findings indicated that local efficiency, global efficiency and modularity, may stabilize in adolescence. Findings for resting-state functional MRI were mixed. Few studies have investigated genetic or environmental influences on development of structural or functional networks. For functional networks, genetic effects have been reported with few significant environmental factors. While no studies of this nature were found for structural networks, other research has provided evidence of age-related changes in heritability of white matter volume, fractional anisotropy, and cortical thickness. Further research is required to understand the development of brain networks and the relevance of environmental and genetic factors.
Studies of electropolymerisation of sodium 2-(3-thienyl)ethyl sulfonate
Publisher: Elsevier BV
Date: 09-1997
Elimination of antibiotic-resistance bacterium and its associated/dissociative bla and aac(3)-II antibiotic-resistance genes in aqueous system via photoelectrocatalytic process
Publisher: Elsevier BV
Date: 11-2017
DOI: 10.1016/J.WATRES.2017.08.050
Abstract: The ubiquity of antibiotic-resistance bacteria (ARB) and antibiotic-resistance genes (ARGs) in various environmental matrices is a potential threat to human and ecological health. Therefore, the inactivation of ARB E. coli S1-23 and the elimination of its associated ARGs, bla
Photocatalytic and photoelectrocatalytic degradation and mineralization of small biological compounds amino acids at TiO2 photoanodes
Publisher: Elsevier BV
Date: 05-2015
Cancellation of photothermally induced instability in an optical resonator
Publisher: Optica Publishing Group
Date: 11-08-2022
Abstract: Optical systems are often subject to parametric instability caused by the delayed response of the optical field to the system dynamics. In some cases, parasitic photothermal effects aggravate the instability by adding new interaction dynamics. This may lead to the possible insurgence or lification of parametric gain that can further destabilize the system. In this paper, we show that the photothermal properties of an optomechanical cavity can be modified to mitigate or even completely cancel optomechanical instability. By inverting the sign of the photothermal interaction to let it cooperate with radiation pressure, we achieve control of the system dynamics to be fully balanced around a stable equilibrium point. Our study provides a feedback solution for optical control and precise metrological applications, specifically in high-sensitivity resonating systems that are particularly susceptible to parasitic photothermal effects, such as our test case of a macroscopic optical levitation setup. This passive stabilization technique is beneficial for improving system performance limited by photothermal dynamics in broad areas of optics, optomechanics, photonics, and laser technologies.
Detection of cytochrome c using a conducting polymer mediator containing electrode
Publisher: Wiley
Date: 03-1996
Rumen microbial community composition varies with diet and host, but a core microbiome is found across a wide geographical range
Publisher: Springer Science and Business Media LLC
Date: 09-10-2015
DOI: 10.1038/SREP14567
Abstract: Ruminant livestock are important sources of human food and global greenhouse gas emissions. Feed degradation and methane formation by ruminants rely on metabolic interactions between rumen microbes and affect ruminant productivity. Rumen and camelid foregut microbial community composition was determined in 742 s les from 32 animal species and 35 countries, to estimate if this was influenced by diet, host species, or geography. Similar bacteria and archaea dominated in nearly all s les, while protozoal communities were more variable. The dominant bacteria are poorly characterised, but the methanogenic archaea are better known and highly conserved across the world. This universality and limited ersity could make it possible to mitigate methane emissions by developing strategies that target the few dominant methanogens. Differences in microbial community compositions were predominantly attributable to diet, with the host being less influential. There were few strong co-occurrence patterns between microbes, suggesting that major metabolic interactions are non-selective rather than specific.
Metal-organic frameworks as selectivity regulators for hydrogenation reactions
Publisher: Springer Science and Business Media LLC
Date: 05-10-2016
DOI: 10.1038/NATURE19763
Abstract: Owing to the limited availability of natural sources, the widespread demand of the flavouring, perfume and pharmaceutical industries for unsaturated alcohols is met by producing them from α,β-unsaturated aldehydes, through the selective hydrogenation of the carbon-oxygen group (in preference to the carbon-carbon group). However, developing effective catalysts for this transformation is challenging, because hydrogenation of the carbon-carbon group is thermodynamically favoured. This difficulty is particularly relevant for one major category of heterogeneous catalyst: metal nanoparticles supported on metal oxides. These systems are generally incapable of significantly enhancing the selectivity towards thermodynamically unfavoured reactions, because only the edges of nanoparticles that are in direct contact with the metal-oxide support possess selective catalytic properties most of the exposed nanoparticle surfaces do not. This has inspired the use of metal-organic frameworks (MOFs) to encapsulate metal nanoparticles within their layers or inside their channels, to influence the activity of the entire nanoparticle surface while maintaining efficient reactant and product transport owing to the porous nature of the material. Here we show that MOFs can also serve as effective selectivity regulators for the hydrogenation of α,β-unsaturated aldehydes. Sandwiching platinum nanoparticles between an inner core and an outer shell composed of an MOF with metal nodes of Fe
Transition Metal (Fe, Co, Mn) Boosting the Lithium Storage of the Multishelled NiO Anode
Publisher: Wiley
Date: 13-03-2020
Spatially entangled photon pairs from lithium niobate nonlocal metasurfaces
Publisher: American Association for the Advancement of Science (AAAS)
Date: 29-07-2022
Abstract: Metasurfaces consisting of nanoscale structures are underpinning new physical principles for the creation and shaping of quantum states of light. Multiphoton states that are entangled in spatial or angular domains are an essential resource for many quantum applications however, their production traditionally relies on bulky nonlinear crystals. We predict and demonstrate experimentally the generation of spatially entangled photon pairs through spontaneous parametric down-conversion from a metasurface incorporating a nonlinear thin film of lithium niobate covered by a silica meta-grating. We measure the correlations of photon pairs and identify their spatial antibunching through violation of the classical Cauchy-Schwarz inequality, witnessing the presence of multimode entanglement. Simultaneously, the photon-pair rate is strongly enhanced by 450 times as compared to unpatterned films because of high-quality-factor resonances. These results pave the way to miniaturization of various quantum devices by incorporating ultrathin metasurfaces functioning as room temperature sources of quantum-entangled photons.
Encapsulated Ni-Co alloy nanoparticles as efficient catalyst for hydrodeoxygenation of biomass derivatives in water
Publisher: Elsevier BV
Date: 11-2021
Dual-functional gum arabic binder for silicon anodes in lithium ion batteries
Publisher: Elsevier BV
Date: 03-2015
Enhanced Thermochemical Water Splitting through Formation of Oxygen Vacancy in La0.6Sr0.4BO3−δ (B=Cr, Mn, Fe, Co, and Ni) Perovskites
Publisher: Wiley
Date: 10-07-2018
Abstract: Oxygen vacancies in catalyst systems play a crucial role in manipulating pivotal redox properties that are strongly dependent on the composition of the material. Herein, for the first time, experimental evidence of a linear correlation between the extent of oxygen vacancy formation in the La
Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes
Publisher: Elsevier BV
Date: 02-2015
Micro/nanostructured porous ZnO as a new DGT binding phase for selective measurement of Cu(II) in water
Publisher: Elsevier BV
Date: 2018
Observation of nonlinear dynamics in an optical levitation system
Publisher: Springer Science and Business Media LLC
Date: 04-11-2020
DOI: 10.1038/S42005-020-00467-2
Abstract: Optical levitation of mechanical oscillators has been suggested as a promising way to decouple the environmental noise and increase the mechanical quality factor. Here, we investigate the dynamics of a free-standing mirror acting as the top reflector of a vertical optical cavity, designed as a testbed for a tripod cavity optical levitation setup. To reach the regime of levitation for a milligram-scale mirror, the optical intensity of the intracavity optical field approaches 3 MW cm −2 . We identify three distinct optomechanical effects: excitation of acoustic vibrations, expansion due to photothermal absorption, and partial lift-off of the mirror due to radiation pressure force. These effects are intercoupled via the intracavity optical field and induce complex system dynamics inclusive of high-order sideband generation, optical bistability, parametric lification, and the optical spring effect. We modify the response of the mirror with active feedback control to improve the overall stability of the system.
Earthworm-induced shifts in microbial diversity in soils with rare versus established invasive earthworm populations
Publisher: Oxford University Press (OUP)
Date: 22-03-2018
Abstract: European earthworms have colonised many parts of Australia, although their impact on soil microbial communities remains largely uncharacterised. An experiment was conducted to contrast the responses to Aporrectodea trapezoides introduction between soils from sites with established (Talmo, 64 A. trapezoides m-2) and rare (Glenrock, 0.6 A. trapezoides m-2) A. trapezoides populations. Our hypothesis was that earthworm introduction would lead to similar changes in bacterial communities in both soils. The effects of earthworm introduction (earthworm activity and cadaver decomposition) did not lead to a convergence of bacterial community composition between the two soils. However, in both soils, the Firmicutes decreased in abundance and a common set of bacteria responded positively to earthworms. The increase in the abundance of Flavobacterium, Chitinophagaceae, Rhodocyclaceae and Sphingobacteriales were consistent with previous studies. Evidence for possible soil resistance to earthworms was observed, with lower earthworm survival in Glenrock microcosms coinciding with A. trapezoides rarity in this site, lower soil organic matter and clay content and differences in the ersity and abundance of potential earthworm mutualist bacteria. These results suggest that while the impacts of earthworms vary between different soils, the consistent response of some bacteria may aid in predicting the impacts of earthworms on soil ecosystems.
Molecular engineering of Ni–/Co–porphyrin multilayers on reduced graphene oxide sheets as bifunctional catalysts for oxygen evolution and oxygen reduction reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6SC02083F
Abstract: Ni– and Co–porphyrin multilayers on reduced graphene oxide (rGO) sheets are reported as novel bifunctional catalysts for the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR).
Trace metal speciation measurements in waters by the liquid binding phase DGT device
Publisher: Elsevier BV
Date: 15-09-2005
DOI: 10.1016/J.TALANTA.2005.03.018
Abstract: The speciation measurements of trace metals by the diffusive gradients in thin-films technique (DGT) using a poly(4-styrenesulfonate) (PSS) aqueous solution as a binding phase and a cellulose dialysis membrane (CDM) as a diffusive layer, CDM-PSS DGT, were investigated and showed good agreement with computer modelling calculations. The diffusion coefficients of ethylenediaminetetraacetic acid (EDTA) complexes with Cd(2+) and Cu(2+) were measured and compared with those of the inorganic metal ions. CDM-PSS DGT device was tested for speciation measurement in s le solutions containing EDTA, tannic acid (TA), glucose (GL), dodecylbenzenesulfonic acid (DBS) and humic acid (HA) as complexing ligands forming organic complexes with varying stability constants. Lower percentages of DGT labile copper concentrations over total filterable copper concentrations obtained from the deployments in freshwater sites indicated that copper complexes with organic matter were basically not measured by the devices.
The fabrication of CNTs/TiO2 photoanodes for sensitive determination of organic compounds
Publisher: IOP Publishing
Date: 04-11-2010
DOI: 10.1088/0957-4484/21/48/485503
Abstract: Titanium dioxide (TiO(2)) and carbon nanotubes (CNTs) are the two most popular functional materials in recent years. In this study, CNTs/TiO(2) composite and TiO(2) photoanodes were fabricated by a dip-coating technique, followed by subsequent calcination. The resultant photoanodes were characterized by scanning electron microscopy (SEM), x-ray diffraction (XRD), and UV-visible spectroscopy (UV-vis). The results suggest that the carbon nanotubes were successfully incorporated with the TiO(2) nanoparticulates without damage and that the resultant TiO(2) nanoparticles consisted of anatase and rutile. The CNTs/TiO(2) photoanodes were capable of oxidizing various types of organic compounds (e.g. glucose, potassium hydrogen phthalate, and phenol) in aqueous solutions in a photoelectrochemical bulk cell. In comparison with the pure TiO(2) photoanode, the sensitivity of the photoanode for the detection of organic compounds has been improved by 64%, while the background current was reduced by 80% due to the introduction of the CNTs. These advantages can be ascribed to the improved adsorptivity to organic compounds, increased absorption of UV light and enhanced electron transport at the CNTs/TiO(2) photoanode due to the introduction of the CNTs.
Rational design of metal oxide catalysts for electrocatalytic water splitting
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1NR06285A
Abstract: The review introduces the mechanisms of heterogeneous hydrogen evolution (HER) and oxygen evolution reactions (OER), summarizes in-situ characterization techniques and surveys strategies to boost the activities of metal oxide electrocatalysts.
Diffusion tensor imaging detects white matter abnormalities and associated cognitive deficits in chronic adolescent TBI
Publisher: Informa UK Limited
Date: 08-03-2013
N-Modified NiO Surface for Superior Alkaline Hydrogen Evolution
Publisher: Wiley
Date: 08-02-2018
Abstract: Boosting the sluggish kinetics of the hydrogen evolution reaction in alkaline environments is key for the large-scale application of water-alkali and chlor-alkali electrolysis. In this study, nitrogen atoms are used to precisely modulate electrochemical active sites on the surface of nickel oxide with low-coordinated oxygen atoms, to achieve enhanced kinetics in alkaline hydrogen evolution. Theoretical and experimental results demonstrate that surface charge redistribution after modulation facilitates both the initial water dissociation step and the subsequent recombination of H
P T
Publisher: American Physical Society (APS)
Date: 26-06-2015
Enhanced visible-light-driven photocatalytic inactivation of Escherichia coli using g-C3N4/TiO2 hybrid photocatalyst synthesized using a hydrothermal-calcination approach
Publisher: Elsevier BV
Date: 12-2015
DOI: 10.1016/J.WATRES.2015.05.053
Abstract: Biohazards are widely present in wastewater, and contaminated water can arouse various waterborne diseases. Therefore, effectively removing biohazards from water is a worldwide need. In this study, a novel visible-light-driven (VLD) graphitic carbon nitride (g-C3N4)/TiO2 hybrid photocatalyst with high photocatalytic bacterial inactivation activity was successfully synthesized using a facile hydrothermal-calcination approach. The optimum synthesized hybrid photocatalyst is composed of micron-sized TiO2 spheres (average diameter: ca. 2 μm) and wrapped with lamellar g-C3N4 (thickness: ca. 2 nm), with narrowing bandgap (ca. 2.48 eV), leading to a significant improvement of visible light (VL) absorption and effective separation of photo-generated electron-hole pairs. This greatly enhances VL photocatalytic inactivation activity towards bacteria in water. Using this hybrid photocatalyst, 10(7) cfu mL(-1) of Escherichia coli K-12 could be completely inactivated within 180 min under VL irradiation. SEM images indicate that bacterial cells were greatly damaged, leading to a severe leakage of intracellular components during photocatalytic inactivation processes. The study concludes that bacterial cell destruction and water disinfection can be achieved using this newly fabricated VLD hybrid photocatalyst.
CoOx@Co Nanoparticle‐based Catalyst for Efficient Selective Transfer Hydrogenation of α,β‐Unsaturated Aldehydes
Publisher: Wiley
Date: 17-12-2020
Elemental 2D Materials: Solution-Processed Synthesis and Applications in Electrochemical Ammonia Production
Publisher: Wiley
Date: 08-10-2021
Abstract: Graphene and related elemental 2D materials have become core materials in nanotechnology and shown great promise for industrially important electrocatalysis reactions. Although excellent progress has been made over the past few years, research into the field of elemental 2D materials beyond graphene is still at an early stage. Importantly, recent research has revealed the promising efficacy of elemental 2D materials as effective nitrogen reduction reaction (NRR) electrocatalysts due to their many excellent properties including high surface activities, acting as active sites for effective functionalization and defect engineering. This review provides a comprehensive account of recent advances in elemental 2D materials with a major focus on the solution‐based synthesis routes and their applications in electrocatalytic NRR for ammonia (NH 3 ) production. After a concise overview of elemental 2D materials, the advantages and challenges of currently available methods for the synthesis of these 2D materials are discussed. Then, the review focuses on the use of these emerging 2D materials in the electrocatalytic reduction of N 2 for sustainable (NH 3 ) synthesis. Finally, the challenges still to be addressed, and important perspectives in this attractive field are emphasized.
Energy-efficient hydrogen production coupled with methanol oxidation using NiFe LDH@NiMo alloy heterostructure
Publisher: Elsevier BV
Date: 2022
Altered Medial Temporal Activation Related to Local Glutamate Levels in Subjects with Prodromal Signs of Psychosis
Publisher: Elsevier BV
Date: 2011
DOI: 10.1016/J.BIOPSYCH.2010.08.033
Abstract: Both medial temporal cortical dysfunction and perturbed glutamatergic neurotransmission are regarded as fundamental pathophysiological features of psychosis. However, although animal models of psychosis suggest that these two abnormalities are interrelated, their relationship in humans has yet to be investigated. We used a combination of functional magnetic resonance imaging and magnetic resonance spectroscopy to investigate the relationship between medial temporal activation during an episodic memory task and local glutamate levels in 22 in iduals with an at-risk mental state for psychosis and 14 healthy volunteers. We observed a significant between-group difference in the coupling of medial temporal activation with local glutamate levels. In control subjects, medial temporal activation during episodic encoding was positively associated with medial temporal glutamate. However, in the clinical population, medial temporal activation was reduced, and the relationship with glutamate was absent. In in iduals at high risk of psychosis, medial temporal dysfunction seemed related to a loss of the normal relationship with local glutamate levels. This study provides the first evidence that links medial temporal dysfunction with the central glutamate system in humans and is consistent with evidence that drugs that modulate glutamatergic transmission might be useful in the treatment of psychosis.
Co/CoO nanoparticles immobilized on Co–N-doped carbon as trifunctional electrocatalysts for oxygen reduction, oxygen evolution and hydrogen evolution reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6CC02513G
Abstract: A Co/CoO@Co–N–C composite was fabricated using shrimp-shell derived N-doped carbon nanodots as precursor, exhibiting superior trifunctional ORR/OER/HER catalytic activity.
Boron doped BiOBr nanosheets with enhanced photocatalytic inactivation of Escherichia coli
Publisher: Elsevier BV
Date: 09-2016
Adsorption and desorption mechanism of aromatic VOCs onto porous carbon adsorbents for emission control and resource recovery: recent progress and challenges
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1EN00929J
Abstract: This review highlights the characteristics of adsorption and desorption of aromatic VOCs on various PCAs as well as the integrated technologies for emission control and resource recovery of industrial VOC exhaust.
Acceptability and optimisation of resources to support antidepressant cessation: a qualitative think-aloud study with patients in Australian primary care
Publisher: Royal College of General Practitioners
Date: 21-08-2023
Abstract: Background: Stopping long-term ( months) antidepressants can be difficult for patients because of unpleasant withdrawal symptoms. Many people do not recognise withdrawal symptoms or do not know how to minimise them to safely stop antidepressants. We developed the RELEASE resources to address these gaps: a medicines information brochure, a decision aid, and drug-specific hyperbolic tapering protocols. Aim: To explore patients’ acceptability of the resources to optimise their use and impact. Design and setting: A think-aloud interview study with adults with lived experience of long-term antidepressant use conducted in south-east Queensland. Interviews were undertaken with participants face-to-face or via videoconferencing. Methods: Fourteen participants purposively s led from general practices were interviewed. Participants verbalised their thoughts, impressions and feelings whilst engaging with each resource. Interviews were analysed using a deductive coding framework including codes related to acceptability and optimisation. Interviews were analysed in a series of four tranches, with iterative modifications made to resources after each tranche. Results: Participants reported the resources were relevant, informative, motivational, and usable. Participants’ comments informed modifications including changes to wording, content order, and layout. Several participants expressed frustration that they had not had these resources earlier, with one reporting the information could have been life changing. Many participants commented on the need for these resources to be widely available to both patients and doctors. Conclusions: The RELEASE resources are acceptable, useful, and potentially life changing. The effectiveness of these consumer-informed resources in supporting safe cessation of long-term antidepressants is currently being tested in general practice.
A facile synthesis of single crystal TiO2 nanorods with reactive {100} facets and their enhanced photocatalytic activity
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CE42505C
Wet-chemistry grafted active pyridinic nitrogen sites on holey graphene edges as high performance ORR electrocatalyst for Zn-Air batteries
Publisher: Elsevier BV
Date: 03-2019
Effects of compositional engineering and surface passivation on the properties of halide perovskites: a theoretical understanding
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CP02896G
Abstract: Halide perovskite solar cells have demonstrated high performance and moisture stability via compositional engineering and surface passivation.
Yolk@shell anatase TiO2 hierarchical microspheres with exposed {001} facets for high-performance dye sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM34787C
One-step synthesis of cobalt-doped MoS2 nanosheets as bifunctional electrocatalysts for overall water splitting under both acidic and alkaline conditions
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC00766G
Abstract: Cobalt covalent doping in MoS 2 effectively regulates its electronic structure to decrease the hydrogen adsorption free energy for high HER and simultaneously contributes additional catalytic active sites for the OER.
Electrodeposition of hierarchically amorphous FeOOH nanosheets on carbonized bamboo as an efficient filter membrane for As(III) removal
Publisher: Elsevier BV
Date: 07-2020
Neuroanatomical abnormalities in schizophrenia: a multimodal voxelwise meta-analysis and meta-regression analysis.
Publisher: Elsevier BV
Date: 04-2011
DOI: 10.1016/J.SCHRES.2010.12.020
Abstract: Despite an increasing number of published voxel based morphometry studies of schizophrenia, there has been no adequate attempt to examine gray (GM) and white matter (WM) abnormalities and the heterogeneity of published findings. In the current article, we used a coordinate based meta-analysis technique to simultaneously examine GM and WM abnormalities in schizophrenia and to assess the effects of gender, chronicity, negative symptoms and other clinical variables. 79 studies meeting our inclusion criteria were included in the meta-analysis. Schizophrenia was associated with GM reductions in the bilateral insula/inferior frontal cortex, superior temporal gyrus, anterior cingulate gyrus/medial frontal cortex, thalamus and left amygdala. In WM analyses of volumetric and diffusion-weighted images, schizophrenia was associated with decreased FA and/or WM in interhemispheric fibers, anterior thalamic radiation, inferior longitudinal fasciculi, inferior frontal occipital fasciculi, cingulum and fornix. Male gender, chronic illness and negative symptoms were associated with more severe GM abnormalities and illness chronicity was associated with more severe WM deficits. The meta-analyses revealed overlapping GM and WM structural findings in schizophrenia, characterized by bilateral anterior cortical, limbic and subcortical GM abnormalities, and WM changes in regions including tracts that connect these structures within and between hemispheres. However, the available findings are biased towards characteristics of schizophrenia s les with poor prognosis.
Visible light active pure rutile TiO2 photoanodes with 100% exposed pyramid-shaped (111) surfaces
Publisher: Springer Science and Business Media LLC
Date: 27-09-2012
Ni2P(O)/Fe2P(O) Interface Can Boost Oxygen Evolution Electrocatalysis
Publisher: American Chemical Society (ACS)
Date: 11-09-2017
Novel conducting polymer-polyelectrolyte composites
Publisher: Elsevier BV
Date: 1997
Two-dimensional CoNi nanoparticles@S,N-doped carbon composites derived from S,N-containing Co/Ni MOFs for high performance supercapacitors
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA01008G
Abstract: CoNi alloy nanoparticles incorporated into S,N-doped carbon structure was obtained by pyrolysis treatment of 2D S,N-containing Co/Ni MOFs nanosheets, as electrode material exhibiting high supercapacitor performance.
Enhanced photocatalytic inactivation of Escherichia coli by a novel Z-scheme g-C 3 N 4 /m-Bi 2 O 4 hybrid photocatalyst under visible light: The role of reactive oxygen species
Publisher: Elsevier BV
Date: 10-2017
Alloying Sb into all inorganic lead-free CsBi3I10 for improving the crystal growth and photovoltaic performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA02245A
Abstract: The incorporation of isovalent Sb 3+ into all inorganic lead-free CsBi 3 I 10 leads to the improved crystal growth and reduced bandgaps. Solar cells based on Cs(Bi 0.7 Sb 0.3 ) 3 I 10 yield a ch ion PCE of 1.54% with a high V oc of 0.81 V.
Enhanced hydrogen desorption from Mg(BH4 )2 by combining nanoconfinement and a Ni catalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00899H
Optomechanically induced transparency in the presence of an external time-harmonic-driving force
Publisher: Springer Science and Business Media LLC
Date: 10-06-2015
DOI: 10.1038/SREP11278
Abstract: We propose a potentially valuable scheme to measure the properties of an external time-harmonic-driving force with frequency ω via investigating its interaction with the combination of a pump field and a probe field in a generic optomechanical system. We show that the spectra of both the cavity field and output field in the configuration of optomechanically induced transparency are greatly modified by such an external force, leading to many interesting linear and non-linear effects, such as the asymmetric structure of absorption in the frequency domain and the antisymmetry breaking of dispersion near ω = ω m . Furthermore, we find that our scheme can be used to measure the initial phase of the external force. More importantly, this setup may eliminate the negative impact of thermal noise on the measurement of the weak external force in virtue of the process of interference between the probe field and the external force. Finally, we show that our configuration can be employed to improve the measurement resolution of the radiation force produced by a weak ultrasonic wave.
Surface hydrogen bonding can enhance photocatalytic H-2 evolution efficiency
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA13328A
Adsorption of Hg2+ by thiol functionalized hollow mesoporous silica microspheres with magnetic cores
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA05184C
Abstract: Thiol functionalized hollow mesoporous silica spheres with magnetic cores were synthesized and found to be highly selective adsorbents of Hg 2+ .
Disrupted axonal fiber connectivity in schizophrenia
Publisher: Elsevier BV
Date: 2011
Effect of cobalt addition on the performance of titanium-based hydrogen-storage electrodes
Publisher: Elsevier BV
Date: 06-1995
Optomechanically induced carrier-envelope-phase-dependent effects and their analytical solutions
Publisher: American Physical Society (APS)
Date: 06-2017
Application of a poly(4-styrenesulfonate) liquid binding layer for measurement of Cu2+ and Cd2+ with the diffusive gradients in thin-films technique
Publisher: American Chemical Society (ACS)
Date: 30-04-2003
DOI: 10.1021/AC020658Q
Abstract: A diffusive gradients in thin films (DGT) technique for measuring Cd and Cu is described using, for the first time, a liquid phase binding layer and a dialysis membrane diffusive layer. The binding phase was a 0.020 M solution of poly(4-styrenesulfonate) (PSS) polyelectrolyte using a specially designed DGT deployment device. The binding properties of Cd2+, Cu2+, and a range of alkali and alkaline earth metal ions to the PSS solution were characterized. The PSS behaved like a cation exchanger with preferential binding to Cd2+ (6.0 micromol mL(-1), log K = 9.0) and Cu2+ (2.5 micromol mL(-1), log K = 8.1) under competitive binding conditions. PSS had a substantial binding capacity at pH > 3 and at competitive Na+ concentrations up to 1.0 M. The DGT devices were successfully validated for Cd2+ (accumulated mass vs time r2 = 0.969, recovery compared with predicted values = 98%) and Cu2+ (r2 = 0.980, recovery = 98%) in synthetic lake water (Windermere). Validation was also undertaken for Cu in a spiked local lake water (Parkwood Pond) (r2 = 0.981, recovery = 46%). The low recovery here was due to complexation of Cu by natural organic matter (14 mg C L(-1)). Field deployments of the DGT devices were successful at measuring Cu concentrations of 0.031-0.63 microg L(-1) in local fresh and salt waterways. These DGT-labile measurements were 0.05-39% of the 0.45-microm-filtered Cu values.
Photocatalytic nanomaterials for solar-driven bacterial inactivation: recent progress and challenges
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7EN00063D
Abstract: Nanostructured photocatalysts have attracted ever-growing research attention in the application of solar energy for water disinfection.
Efficient Synthesis of 2-Methylfuran from Bio-Derived Furfural over Supported Copper Catalyst: The Synergistic Effect of CuOx and Cu
Publisher: Wiley
Date: 31-10-2017
Network component analysis reveals developmental trajectories of structural connectivity and specific alterations in autism spectrum disorder
Publisher: Wiley
Date: 31-05-2017
DOI: 10.1002/HBM.23656
Electrolyte Effect on Electrocatalytic Hydrogen Evolution Performance of One-Dimensional Cobalt-Dithiolene Metal-Organic Frameworks: A Theoretical Perspective
Publisher: American Chemical Society (ACS)
Date: 27-03-2018
Bimetallic Carbide as a Stable Hydrogen Evolution Catalyst in Harsh Acidic Water
Publisher: American Chemical Society (ACS)
Date: 28-11-2018
Effect of long-term cannabis use on axonal fibre connectivity
Publisher: Oxford University Press (OUP)
Date: 04-06-2012
DOI: 10.1093/BRAIN/AWS136
Variant Plateau’s law in atomically thin transition metal dichalcogenide dome networks
Publisher: Springer Science and Business Media LLC
Date: 24-02-2023
DOI: 10.1038/S41467-023-36565-2
Abstract: Since its fundamental inception from soap bubbles, Plateau’s law has sparked extensive research in equilibrated states. However, most studies primarily relied on liquids, foams or cellular structures, whereas its applicability has yet to be explored in nano-scale solid films. Here, we observed a variant Plateau’s law in networks of atomically thin domes made of solid two-dimensional (2D) transition metal dichalcogenides (TMDs). Discrete layer-dependent van der Waals (vdWs) interaction energies were experimentally and theoretically obtained for domes protruding in different TMD layers. Significant surface tension differences from layer-dependent vdWs interaction energies manifest in a variant of this fundamental law. The equivalent surface tension ranges from 2.4 to 3.6 N/m, around two orders of magnitude greater than conventional liquid films, enabling domes to sustain high gas pressure and exist in a fundamentally variant nature for several years. Our findings pave the way towards exploring variant discretised states with applications in opto-electro-mechanical devices.
A versatile PDMS submicrobead/graphene oxide nanocomposite ink for the direct ink writing of wearable micron-scale tactile sensors
Publisher: Elsevier BV
Date: 09-2019
Photoelectrocatalytic activity of mesoporous TiO2 films prepared using the sol-gel method with tri-block copolymer as structure directing agent
Publisher: Springer Science and Business Media LLC
Date: 05-02-2008
Neurobehaviour between birth and 40 weeks' gestation in infants born <30 weeks' gestation and parental psychological wellbeing: Predictors of brain development and child outcomes
Publisher: Springer Science and Business Media LLC
Date: 24-04-2014
An alternative protocol for isolating the flanking sequences of a mutation
Publisher: Springer Science and Business Media LLC
Date: 09-11-2006
Transformation of carbon-encapsulated metallic Co into ultrafine Co/CoO nanoparticles exposed on N-doped graphitic carbon for high-performance rechargeable zinc-air battery
Publisher: Elsevier BV
Date: 08-2018
Optical back-action on the photothermal relaxation rate
Publisher: Optica Publishing Group
Date: 02-02-2021
Abstract: Photothermal effects can alter the response of an optical cavity, for ex le, by inducing self-locking behavior or unstable anomalies. The consequences of these effects are often regarded as parasitic and generally cause limited operational performance of the cavity. Despite their importance, however, photothermal parameters are usually hard to characterize precisely. In this work, we use an optical cavity strongly coupled to photothermal effects to experimentally observe an optical back-action on the photothermal relaxation rate. This effect, reminiscent of the radiation-pressure-induced optical spring effect in cavity optomechanical systems, uses optical detuning as a fine control to change the photothermal relaxation process. The photothermal relaxation rate of the system can be accordingly modified by more than an order of magnitude. This approach offers an opportunity to obtain precise in situ estimations of the parameters of the cavity in a way that is compatible with a wide range of optical resonator platforms. Through this back-action effect, we are able to determine the natural photothermal relaxation rate and the effective thermal conductivity of cavity mirrors with unprecedented resolution.
Advances and challenges in scalable carbon dioxide electrolysis
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3EY00159H
Opportunistic Bacteria Dominate the Soil Microbiome Response to Phenanthrene in a Microcosm-Based Study
Publisher: Frontiers Media SA
Date: 21-11-2018
Rutile {111} Faceted TiO2 Film with High Ability for Selective Adsorption of Aldehyde
Publisher: American Chemical Society (ACS)
Date: 24-07-2015
Effects of potassium-boron addition on the performance of titanium based hydrogen storage alloy electrodes
Publisher: Elsevier BV
Date: 05-1996
Study protocol: Imaging brain development in the Childhood to Adolescence Transition Study (iCATS)
Publisher: Springer Science and Business Media LLC
Date: 30-04-2014
Membrane-Based Portable Colorimetric Gaseous Chlorine Sensing Probe
Publisher: American Chemical Society (ACS)
Date: 15-12-2020
Earth-abundant Ni2P/g-C3N4 lamellar nanohydrids for enhanced photocatalytic hydrogen evolution and bacterial inactivation under visible light irradiation
Publisher: Elsevier BV
Date: 11-2017
Thiourea sole doping reagent approach for controllable N, S co-doping of pre-synthesized large-sized carbon nanospheres as electrocatalyst for oxygen reduction reaction
Publisher: Elsevier BV
Date: 10-2015
Highly sensitive detection of nitrite by using gold nanoparticle-decorated α-Fe2O3 nanorod arrays as self-supporting photo-electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9QI00176J
Abstract: Gold nanoparticle (Au NP)-decorated-Fe 2 O 3 nanorod arrays (AuNPs-Fe 2 O 3 ) as a photoelectrode are applied to the detection of nitrite solution with a low limit of detection and high sensitivity.
Characteristics of magnesium-based hydrogen-storage alloy electrodes
Publisher: Elsevier BV
Date: 06-1995
Challenging fabrication of hollow ceramic fiber supported Cu3(BTC)2 membrane for hydrogen separation
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM16371C
Mechanistic study of the visible-light-driven photocatalytic inactivation of bacteria by graphene oxide–zinc oxide composite
Publisher: Elsevier BV
Date: 12-2015
Clinical outcome of children with newly diagnosed acute lymphoblastic leukemia treated in a single center in Shanghai, China
Publisher: Informa UK Limited
Date: 2008
DOI: 10.1080/10428190701784730
Abstract: Aim of the study is to determine the clinical outcome of 158 cases of childhood acute lymphoblastic leukemia (ALL) treated with a risk-directed protocol in Shanghai, China. One hundred fifty eight consecutive newly diagnosed patients were enrolled in the ALL-XH-99 protocol. The Kaplan - Meier method was used to estimate survival rates and comparisons were made by using the 2-sided log-rank test. Of all the 158 patients evaluated, 153 (96.8%) achieved complete remission (CR) in a median time of 33 days. The 5-year event-free survival (EFS) rate was 66.9% +/- 13.1%. Relapse occurred in 15 patients with isolated hematologic relapse in 13 and isolated central nervous system relapse in 2. Seven patients died of treatment-related complications. The medical cost for each patient does not exceed 25,000 USD. Contemporary risk-directed therapy can cure approximately two thirds of patients with ALL at relatively low cost. The challenge is to extend curative treatment to less privileged patients having fewer financial resources.
Recent Progress of Direct Ink Writing of Electronic Components for Advanced Wearable Devices
Publisher: American Chemical Society (ACS)
Date: 15-08-2019
An efficient and reusable bimetallic Ni3Fe NPs@C catalyst for selective hydrogenation of biomass-derived levulinic acid to γ-valerolactone
Publisher: Elsevier BV
Date: 10-2018
Accelerated evolution of bacterial antibiotic resistance through early emerged stress responses driven by photocatalytic oxidation
Publisher: Elsevier BV
Date: 07-2020
A rapid analytical method for predicting the oxygen demand of wastewater
Publisher: Springer Science and Business Media LLC
Date: 10-10-2006
DOI: 10.1007/S00216-006-0817-3
Abstract: In this study, an investigation was undertaken to determine whether the predictive accuracy of an indirect, multiwavelength spectroscopic technique for rapidly determining oxygen demand (OD) values is affected by the use of unfiltered and turbid s les, as well as by the use of absorbance values measured below 200 nm. The rapid OD technique was developed that uses UV-Vis spectroscopy and artificial neural networks (ANNs) to indirectly determine chemical oxygen demand (COD) levels. It was found that the most accurate results were obtained when a spectral range of 190-350 nm was provided as data input to the ANN, and when using unfiltered s les below a turbidity range of 150 NTU. This is because high correlations of above 0.90 were obtained with the data using the standard COD method. This indicates that s les can be measured directly without the additional need for preprocessing by filtering. S les with turbidity values higher than 150 NTU were found to produce poor correlations with the standard COD method, which made them unsuitable for accurate, real-time, on-line monitoring of OD levels.
Controllable synthesis of mesostructures from TiO2 hollow to porous nanospheres with superior rate performance for lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5SC03203B
Abstract: Uniform TiO 2 nanospheres formed from hollow and mesoporous nanospheres composed of 7 nm sized nanoparticles have been synthesized and show superior rate performance as anode materials for lithium ion batteries.
Sub-lethal photocatalysis bactericidal technology cause longer persistence of antibiotic-resistance mutant and plasmid through the mechanism of reduced fitness cost
Publisher: Elsevier BV
Date: 05-2019
Fabrication of mesoporous lignocellulose aerogels from wood via cyclic liquid nitrogen freezing-thawing in ionic liquid solution
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM31310C
Acid degradable ZnO quantum dots as a platform for targeted delivery of an anticancer drug
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM12119G
The stress response mechanisms of biofilm formation under sub-lethal photocatalysis
Publisher: Elsevier BV
Date: 06-2022
Optimization of wear and friction characteristics of Phyllanthus Emblica seed oil based lubricant using response surface methodology
Publisher: Elsevier BV
Date: 12-2018
The typical structural evolution of silicon anode
Publisher: Elsevier BV
Date: 04-2022
Determination of mercury in aquatic systems by DGT device using thiol-modified carbon nanoparticle suspension as the liquid binding phase
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NJ02007D
Abstract: DGT device using SH-CNPs as the liquid binding phase and cellulose acetate membrane as the diffusive layer is demonstrated for determination of Hg 2+ in natural waters.
Distinctive O-O bond formation pathways at different electrode potentials
Publisher: Elsevier BV
Date: 08-2021
An investigation of cognitive 'branching' processes in major depression
Publisher: Springer Science and Business Media LLC
Date: 10-11-2009
Rapid Photoelectrochemical Method for in Situ Determination of Effective Diffusion Coefficient of Organic Compounds
Publisher: American Chemical Society (ACS)
Date: 19-02-2008
DOI: 10.1021/JP710900S
On the discharging process of titanium-based hydrogen storage alloy electrode via a.c. impedance analysis
Publisher: Elsevier BV
Date: 09-1996
Highly Dispersed Ru Nanoparticles on Boron-Doped Ti3C2Tx (MXene) Nanosheets for Synergistic Enhancement of Electrocatalytic Hydrogen Evolution
Publisher: Wiley
Date: 19-08-2021
Abstract: 2D‐layered materials have attracted increasing attention as low‐cost supports for developing active catalysts for the hydrogen evolution reaction (HER). In addition, atomically thin Ti 3 C 2 T x (MXene) nanosheets have surface termination groups (T x : F, O, and OH), which are active sites for effective functionalization. In this work, heteroatom (boron)‐doped Ti 3 C 2 T x (MXene) nanosheets are developed as an efficient solid support to host ultrasmall ruthenium (Ru) nanoparticles for electrocatalytic HER. The quantum‐mechanical first‐principles calculations and electrochemical tests reveal that the B‐doping onto 2D MXene nanosheets can largely improve the intermediate H* adsorption kinetics and reduce the charge‐transfer resistance toward the HER, leading to increased reactivity of active sites and favorable electrode kinetics. Importantly, the newly designed electrocatalyst based on Ru nanoparticles supported on B‐doped MXene (Ru@B–Ti 3 C 2 T x ) nanosheets shows a remarkable catalytic activity with low overpotentials of 62.9 and 276.9 mV to drive 10 and 100 mA cm −2 , respectively, for the HER, while exhibiting excellent cycling stabilities. Moreover, according to the theoretical calculations, Ru@B–Ti 3 C 2 T x exhibits a near‐zero value of Gibbs free energy (Δ G H* = 0.002 eV) for the HER. This work introduces a facile strategy to functionalize MXene for use as a solid support for efficient electrocatalysts.
Nitrogen-Doped Carbon Nanotube Confined Co–N x Sites for Selective Hydrogenation of Biomass-Derived Compounds
Publisher: Wiley
Date: 22-01-2019
Abstract: Biomass is the most abundant renewable resource on earth and developing high-performance nonprecious selective hydrogenation (SH) catalysts will enable the use of biomass to replace rapidly diminishing fossil resources. This work utilizes ZIF-67-derived nitrogen-doped carbon nanotubes to confine Co nanoparticles (NPs) with Co-N
Co/Co9S8@S,N-doped porous graphene sheets derived from S, N dual organic ligands assembled Co-MOFs as superior electrocatalysts for full water splitting in alkaline media
Publisher: Elsevier BV
Date: 12-2016
Rutile nanowire array electrodes for photoelectrochemical determination of organic compounds
Publisher: Elsevier BV
Date: 09-2013
Compelling imagery, unanticipated speech and deceptive memory: Neurocognitive models of auditory verbal hallucinations in schizophrenia
Publisher: Informa UK Limited
Date: 02-2004
Importance of Micromonospora spp. as Colonizers of Cellulose in Freshwater Lakes as Demonstrated by Quantitative Reverse Transcriptase PCR of 16S rRNA
Publisher: American Society for Microbiology
Date: 05-2012
DOI: 10.1128/AEM.07314-11
Abstract: The relative abundance of micromonosporas in the bacterial communities inhabiting cellulose baits, water columns, and sediments of two freshwater lakes was determined by quantitative PCR (qPCR) of reverse-transcribed 16S rRNA. Micromonospora spp. were shown to be significant members of the active bacterial population colonizing cellulosic substrates in the lake sediment, and their increased prevalence with greater depth was confirmed by enumeration of CFU.
Fifty important research questions in microbial ecology
Publisher: Oxford University Press (OUP)
Date: 03-04-2017
Abstract: Microbial ecology provides insights into the ecological and evolutionary dynamics of microbial communities underpinning every ecosystem on Earth. Microbial communities can now be investigated in unprecedented detail, although there is still a wealth of open questions to be tackled. Here we identify 50 research questions of fundamental importance to the science or application of microbial ecology, with the intention of summarising the field and bringing focus to new research avenues. Questions are categorised into seven themes: host-microbiome interactions health and infectious diseases human health and food security microbial ecology in a changing world environmental processes functional ersity and evolutionary processes. Many questions recognise that microbes provide an extraordinary array of functional ersity that can be harnessed to solve real-world problems. Our limited knowledge of spatial and temporal variation in microbial ersity and function is also reflected, as is the need to integrate micro- and macro-ecological concepts, and knowledge derived from studies with humans and other erse organisms. Although not exhaustive, the questions presented are intended to stimulate discussion and provide focus for researchers, funders and policy makers, informing the future research agenda in microbial ecology.
Highly efficient overlayer derived from peroxotitanium for dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00688J
Synthesis and characterization of germanium-centered three-dimensional crystalline porous aromatic framework
Publisher: Springer Science and Business Media LLC
Date: 09-01-2012
DOI: 10.1557/JMR.2011.433
A low-cost cementite (Fe3C) nanocrystal@N-doped graphitic carbon electrocatalyst for efficient oxygen reduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP04252F
Abstract: A core–shell structure Fe 3 C nanocrystal@N-doped graphitic carbon (Fe 3 C@NGC) nanocomposite was successfully fabricated, and used as an electrocatalyst with large surface area, exhibiting great potential for oxygen reduction reaction (ORR).
Temperature-Controlled Selectivity of Hydrogenation and Hydrodeoxygenation in the Conversion of Biomass Molecule by the Ru1/mpg-C3N4 Catalyst
Publisher: American Chemical Society (ACS)
Date: 30-08-2018
DOI: 10.1021/JACS.8B06029
Abstract: Hydrogenation and hydrodeoxygenation are significant and distinct approaches for the conversion of biomass and biomass-derived oxygenated chemicals into high value-added chemicals and fuels. However, it remains a great challenge to synthesize catalysts that simultaneously possess excellent hydrogenation and hydrodeoxygenation performance. Herein, we report a catalyst made of isolated single-atom Ru supported on mesoporous graphitic carbon nitride (Ru
Multi-shelled CeO2 hollow microspheres as superior photocatalysts for water oxidation
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3NR06822F
Abstract: A general self-templating method is introduced to construct triple-shelled CeO 2 hollow microspheres with excellent photocatalytic activity for O 2 evolution.
Directly hydrothermal growth of ultrathin MoS2 nanostructured films as high performance counter electrodes for dye-sensitised solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA00583J
Functionalization of perovskite thin films with moisture-tolerant molecules
Publisher: Springer Science and Business Media LLC
Date: 18-01-2016
Cortical Brain Abnormalities in 4474 Individuals With Schizophrenia and 5098 Control Subjects via the Enhancing Neuro Imaging Genetics Through Meta Analysis (ENIGMA) Consortium
Publisher: Elsevier BV
Date: 11-2018
Hierarchical Porous Carbon Materials Derived from Kelp for Superior Capacitive Applications
Publisher: American Chemical Society (ACS)
Date: 04-2019
Development of a Rapid Ferricyanide-Mediated Assay for Biochemical Oxygen Demand Using a Mixed Microbial Consortium
Publisher: American Chemical Society (ACS)
Date: 05-2003
DOI: 10.1021/AC0206420
Abstract: Ferricyanide-mediated (FM) microbial reactions were used for the rapid determination of the biochemical oxygen demand (BOD) of a range of synthetic and real wastewater s les. Four single-species microbial seeds and a synthetically prepared microbial consortium were compared. In all cases, the microbial consortium exhibited a greater extent and rate of biodegradation compared to the in idual microbial seeds. Markedly improved correlation to the standard BOD5 method was also noted for the microbial consortium (compared to the single-species seeds). A linear dynamic range up to 200 mg BOD5 L(-1) was observed, which is considerably greater than the linear range of the standard BOD5 assay and most other rapid BOD assays reported. In addition, biodegradation efficiencies comparable to the 5-day BOD5 assay (and much greater than other rapid BOD assays) were observed in 3 h. A highly significant correlation (R = 0.935, p = 0.000, n = 30) between the FM-BOD method and the standard BOD5 method was found for a wide ersity of real wastewater s les. The results indicate that the FM-BOD assay is a promising, rapid, alternative to the standard 5-day BOD5 assay.
Photocatalytic Synthesis of TiO2 and Reduced Graphene Oxide Nanocomposite for Lithium Ion Battery
Publisher: American Chemical Society (ACS)
Date: 10-07-2012
DOI: 10.1021/AM300722D
Abstract: In this work, we synthesized graphene oxide (GO) using the improved Hummers' oxidation method. TiO2 nanoparticles can be anchored on the GO sheets via the abundant oxygen-containing functional groups such as epoxy, hydroxyl, carbonyl, and carboxyl groups on the GO sheets. Using the TiO2 photocatalyst, the GO was photocatalytically reduced under UV illumination, leading to the production of TiO2-reduced graphene oxide (TiO2-RGO) nanocomposite. The as-prepared TiO2, TiO2-GO, and TiO2-RGO nanocomposite were used to fabricate lithium ion batteries (LIBs) as the active anode materials and their corresponding lithium ion insertion/extraction performance was evaluated. The resultant LIBs of the TiO2-RGO nanocomposite possesses more stable cyclic performance, larger reversible capacity, and better rate capability, compared with that of the pure TiO2 and TiO2-GO s les. The electrochemical and materials characterization suggest that the graphene network provides efficient pathways for electron transfer, and the TiO2 nanoparticles prevent the restacking of the graphene nanosheets, resulting in the improvement in both electric conductivity and specific capacity, respectively. This work suggests that the TiO2 based photocatalytic method could be a simple, low-cost, and efficient approach for large-scale production of anode materials for lithium ion batteries.
Revealing the Role of Electrocatalyst Crystal Structure on Oxygen Evolution Reaction with Nickel as an Example
Publisher: Wiley
Date: 10-09-2018
Abstract: Establishing a correlation between the crystal structure and electrocatalytic activity is crucial to the rational design of high performance electrocatalysts. In this work, taking the widely investigated nickel (Ni) based nonprecious oxygen evolution reaction (OER) catalyst as an ex le, for the first time, it is reported that the crystal structure plays a critical role in determining the OER performance. Similar-sized nickel nanoparticles but in different hexagonal close-packed phase and face-centered cubic phase coated with N-doped carbon shells, noted as hcp-Ni@NC and fcc-Ni@NC, are successfully prepared, respectively, in which the N-coated carbon shell structures were also similar. Surprisingly, a dramatically enhanced OER performance of hcp-Ni@NC in comparison with fcc-Ni@NC is observed. The hcp-Ni@NC only requires 305 mV overpotential to achieve the current density of 10 mA cm
The nature of abnormal language processing in euthymic bipolar I disorder: evidence for a relationship between task demand and prefrontal function
Publisher: Wiley
Date: 06-2007
DOI: 10.1111/J.1399-5618.2007.00422.X
Abstract: Abnormal language processing is a consistent finding in bipolar disorder (BD). We used functional magnetic resonance imaging (fMRI) to investigate the core components of language processing as well as the impact of task demand in a group of bipolar subjects. Twelve euthymic dextral male BD I participants receiving lithium monotherapy were matched with 12 controls. Groups were matched for age, years of education and estimated premorbid IQ. We employed a factorial design manipulating task demand (decision versus fluency) and task domain (phonetic versus semantic) to investigate differences in language processing between groups and across different task domains and requirements. Data were fitted to haemodynamic response models convolved to the experimental design. Group and task difference maps were generated. During the scanning session bipolar patients demonstrated significantly slower reaction times. However, groups demonstrated the same task accuracy except for one domain (phonetic decision). All participants activated regions known to be engaged by language tasks, but compared to controls the bipolar patients showed altered patterns of prefrontal activation which were related to the nature of the task, language processing, and increasing task demand. We have demonstrated abnormal prefrontal activation in bipolar patients across a range of language tasks with varying task demands.
One-step synthesis of nitrogen-doped microporous carbon materials as metal-free electrocatalysts for oxygen reduction reaction
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00846D
Abstract: In this work, a series of microporous nitrogen-doped carbon catalysts are reported through a convenient preparation route, and exhibit excellent performance for oxygen reduction reaction.
Cannabis affects people differently: inter-subject variation in the psychotogenic effects of Δ9-tetrahydrocannabinol: a functional magnetic resonance imaging study with healthy volunteers
Publisher: Cambridge University Press (CUP)
Date: 10-2012
DOI: 10.1017/S0033291712001924
Abstract: Cannabis can induce transient psychotic symptoms, but not all users experience these adverse effects. We compared the neural response to Δ 9 -tetrahydrocannabinol (THC) in healthy volunteers in whom the drug did or did not induce acute psychotic symptoms. In a double-blind, placebo-controlled, pseudorandomized design, 21 healthy men with minimal experience of cannabis were given either 10 mg THC or placebo, orally. Behavioural and functional magnetic resonance imaging measures were then recorded whilst they performed a go/no-go task. The s le was sub ided on the basis of the Positive and Negative Syndrome Scale positive score following administration of THC into transiently psychotic (TP n = 11) and non-psychotic (NP n = 10) groups. During the THC condition, TP subjects made more frequent inhibition errors than the NP group and showed differential activation relative to the NP group in the left parahippoc al gyrus, the left and right middle temporal gyri and in the right cerebellum. In these regions, THC had opposite effects on activation relative to placebo in the two groups. The TP group also showed less activation than the NP group in the right middle temporal gyrus and cerebellum, independent of the effects of THC. In this first demonstration of inter-subject variability in sensitivity to the psychotogenic effects of THC, we found that the presence of acute psychotic symptoms was associated with a differential effect of THC on activation in the ventral and medial temporal cortex and cerebellum, suggesting that these regions mediate the effects of the drug on psychotic symptoms.
Adenovirus inactivation by in situ photocatalytically and photoelectrocatalytically generated halogen viricides
Publisher: Elsevier BV
Date: 10-2014
Thermally Induced Crystallization of High Quality CH3NH3PbI3 Film with Large Grains for Highly Efficient Perovskite Solar Cells
Publisher: Wiley
Date: 11-04-2017
Abstract: Recently, fully covered and smooth perovskite films could be fabricated by optimized coating methods however, it is still hard to prepare perovskite films with large grain sizes and high crystallinity. Given the fact that thermal energy can promote crystallization, we combine high-temperature crystallization with the application of a solvent featuring a high boiling point, in order to produce high quality perovskite films with micrometer-sized grains. We further investigated the temperature dependence of the thermally induced synthetic strategy, whereby the grains become larger as the temperature is elevated. After solar cell device fabrication, the efficiency of the best cell can attain a high value of 15.53 % with reduced hysteresis behavior.
Spontaneous Redox Approach to the Self-Assembly Synthesis of Au/CeO2 Plasmonic Photocatalysts with Rich Oxygen Vacancies for Selective Photocatalytic Conversion of Alcohols
Publisher: American Chemical Society (ACS)
Date: 24-08-2018
Abstract: We present the self-assembly synthesis of core-shell structure Au/CeO
Nature-based catalyst for visible-light-driven photocatalytic CO2 reduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8EE01781F
Abstract: We demonstrate a rational fabrication of hierarchical treated rape pollen as metal-free catalyst for visible-light-driven photocatalytic CO 2 reduction.
The relationship between cognitive and neuroimaging outcomes in children treated for acute lymphoblastic leukemia with chemotherapy only: A systematic review
Publisher: Wiley
Date: 03-10-2016
DOI: 10.1002/PBC.26188
Abstract: Cognitive late-effects have been identified in patients treated with chemotherapy-only protocols for childhood acute lymphoblastic leukemia (ALL), yet the underlying neuropathology is not well understood. This review synthesized recent findings from eight articles investigating the relationship between neurocognitive and neuroimaging outcomes for patients treated for ALL with chemotherapy-only protocols. Reported cognitive domains, imaging methods, and neuroanatomy examined were variable. Despite this, 62.5% (n = 5) of the reviewed studies found a significant relationship between cognitive and imaging outcomes. Greater understanding of the effects of treatment on neuroanatomy and cognitive outcomes is critical for proactively managing ALL cognitive late-effects. Research directions are suggested.
Intrinsic motivation and academic performance in school-age children born extremely preterm: The contribution of working memory
Publisher: Elsevier BV
Date: 05-2018
Synthesis and electrode characteristics of the new composite alloys Mg2Ni-xwt.%Ti2Ni
Publisher: Elsevier BV
Date: 07-1996
A portable miniature UV-LED-based photoelectrochemical system for determination of chemical oxygen demand in wastewater
Publisher: Elsevier BV
Date: 09-2009
A Facile Vapor-Phase Hydrothermal Method for Direct Growth of Titanate Nanotubes on a Titanium Substrate via a Distinctive Nanosheet Roll-Up Mechanism
Publisher: American Chemical Society (ACS)
Date: 08-11-2011
DOI: 10.1021/JA207530E
Abstract: We present a facile vapor-phase hydrothermal approach for direct growth of vertically aligned titanate nanotubes on a titanium foil substrate. The resultant nanotubes display external diameters of 50-80 nm and walls with an average thickness of 10 nm that consist of more than 10 titanate layers. This is in strong contrast to the titanate nanotubes obtained from alkaline liquid-phase hydrothermal methods, which are generally smaller than 12 nm in external diameter and have walls consisting of less than five titanate layers. Importantly, the investigation confirmed that under vapor-phase hydrothermal conditions, the nanotubes were formed via a distinctive nanosheet roll-up mechanism that differs remarkably from those of conventional liquid-phase hydrothermal processes. For the first time, a coaxial circular cylinder crystal structure of the resultant nanotubes was confirmed.
Environmentally benign periphyton bioreactors for controlling cyanobacterial growth
Publisher: Elsevier BV
Date: 12-2010
DOI: 10.1016/J.BIORTECH.2010.07.063
Abstract: Microporous suspended bioreactors immobilized with periphytons were submerged between sediments and overlying water to control phosphorus release and cyanobacterial (Microcystis aeruginosa) growth. The results showed that the periphyton mainly consisted of bacteria and diatoms. The application of periphyton bioreactor decreased the levels of exchange phosphorus (Exch-P) in sediments from 1.69 to 0.49 mg g(-1) and total phosphorus (TP) from 0.75 to 0.30 mg L(-1). The significant reduction of the total dissolved phosphorus (TDP) content was not only beneficial for the decrease of the cyanobacterial growth, but also stimulates the periphyton to produce natural cyanobacterial inhibitors such as gallic acid and ethyl-2-methylacetoacetate. These synergistic effects led to the growth inhabitation of M. aeruginosa when the initial concentrations of M. aeruginosa were less than 119.3 microg L(-1). This study provides an environmentally-friendly and publically acceptable method of controlling bacterial blooms when compared to traditional addition of chemicals.
Few-layer graphdiyne doped with sp-hybridized nitrogen atoms at acetylenic sites for oxygen reduction electrocatalysis
Publisher: Springer Science and Business Media LLC
Date: 06-08-2018
DOI: 10.1038/S41557-018-0100-1
Abstract: The oxygen reduction reaction (ORR) is a fundamental reaction for energy storage and conversion. It has mainly relied on platinum-based electrocatalysts, but the chemical doping of carbon-based materials has proven to be a promising strategy for preparing metal-free alternatives. Nitrogen doping in particular provides a erse range of nitrogen forms. Here, we introduce a new form of nitrogen doping moieties -sp-hybridized nitrogen (sp-N) atoms into chemically defined sites of ultrathin graphdiyne, through pericyclic replacement of the acetylene groups. The as-prepared sp-N-doped graphdiyne catalyst exhibits overall good ORR performance, in particular with regards to peak potential, half-wave potential and current density. Under alkaline conditions it was comparable to commercial Pt/C, and showed more rapid kinetics. And although its performances are a bit lower than those of Pt/C in acidic media they surpass those of other metal-free materials. Taken together, experimental data and density functional theory calculations suggest that the high catalytic activity originates from the sp-N dopant, which facilitates O
Tungsten‐Doped Nanocrystalline V6O13 Nanoparticles as Low‐Cost and High‐Performance Electrodes for Energy Storage Devices
Publisher: Wiley
Date: 17-04-2019
Instant inactivation and rapid decomposition of Escherichia coli using a high efficiency TiO2 nanotube array photoelectrode
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3RA43708F
Modulation of effective connectivity during emotional processing by Δ9-tetrahydrocannabinol and cannabidiol
Publisher: Oxford University Press (OUP)
Date: 24-09-2009
Oxygen Dependence in a Dual‐Phase Electrochemical Biosensing System
Publisher: Wiley
Date: 02-2005
Regulating the Catalytic Performance of Single-Atomic-Site Ir Catalyst for Biomass Conversion by Metal–Support Interactions
Publisher: American Chemical Society (ACS)
Date: 30-04-2019
Surface capacitive contributions: Towards high rate anode materials for sodium ion batteries
Publisher: Elsevier BV
Date: 03-2015
Conducting electroactive polymer-based biosensors
Publisher: Elsevier BV
Date: 04-1999
Growth and in situ transformation of TiO2 and HTiOF3 crystals on chitosan-polyvinyl alcohol co-polymer substrates under vapor phase hydrothermal conditions
Publisher: Springer Science and Business Media LLC
Date: 13-01-2016
A self-sponsored doping approach for controllable synthesis of S and N co-doped trimodal-porous structured graphitic carbon electrocatalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 19-08-2014
DOI: 10.1039/C4EE01779J
Structural connectivity relates to perinatal factors and functional impairment at 7 years in children born very preterm
Publisher: Elsevier BV
Date: 07-2016
The catalytic behaviour in aqueous-phase hydrogenation over a renewable Ni catalyst derived from a perovskite-type oxide
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8DT03907K
Abstract: Water is inevitably associated with the production of bio-derived platform molecules, but most supported metallic catalysts have poor water compatibility.
Growth of Polypyrrole Ultrathin Films on MoS2 Monolayers as High-Performance Supercapacitor Electrodes
Publisher: Wiley
Date: 22-12-2015
Diffusion-Controlled Detection of Trinitrotoluene: Interior Nanoporous Structure and Low Highest Occupied Molecular Orbital Level of Building Blocks Enhance Selectivity and Sensitivity
Publisher: American Chemical Society (ACS)
Date: 03-2012
DOI: 10.1021/JA300306E
Abstract: Development of simple, cost-effective, and sensitive fluorescence-based sensors for explosives implies broad applications in homeland security, military operations, and environmental and industrial safety control. However, the reported fluorescence sensory materials (e.g., polymers) usually respond to a class of analytes (e.g., nitroaromatics), rather than a single specific target. Hence, the selective detection of trace amounts of trinitrotoluene (TNT) still remains a big challenge for fluorescence-based sensors. Here we report the selective detection of TNT vapor using the nanoporous fibers fabricated by self-assembly of carbazole-based macrocyclic molecules. The nanoporosity allows for time-dependent diffusion of TNT molecules inside the material, resulting in further fluorescence quenching of the material after removal from the TNT vapor source. Under the same testing conditions, other common nitroaromatic explosives and oxidizing reagents did not demonstrate this postexposure fluorescence quenching rather, a recovery of fluorescence was observed. The postexposure fluorescence quenching as well as the sensitivity is further enhanced by lowering the highest occupied molecular orbital (HOMO) level of the nanofiber building blocks. This in turn reduces the affinity for oxygen, thus allocating more interaction sites for TNT. Our results present a simple and novel way to achieve detection selectivity for TNT by creating nanoporosity and tuning molecular electronic structure, which when combined may be applied to other fluorescence sensor materials for selective detection of vapor analytes.
Linking fungal–bacterial co-occurrences to soil ecosystem function
Publisher: Elsevier BV
Date: 06-2017
DOI: 10.1016/J.MIB.2017.06.006
Abstract: Fungi and bacteria are major players in soil biogeochemical cycles, however, most studies linking soil processes to microbial function ignore the potential role of interactions between these groups. A small number of studies have used correlation network analyses to investigate fungal-bacterial co-occurrences in soil, and revealed differences, as well as overlaps, in the ecosystem roles of these groups. These results contradict the view that fungi and bacteria are two distinct functional groups which can be studied in isolation. A more comprehensive understanding of the interplay between soil properties, biogeochemical cycles and the interactions between fungi and bacteria will be an important step towards improving the prediction and management of soil ecosystem services.
Micro/nano-scaled carbon spheres based on hydrothermal carbonization of agarose
Publisher: Elsevier BV
Date: 11-2015
Development of a fully automated inorganic nitrogen analyzer for continuous, unattended monitoring of water quality
Publisher: Wiley
Date: 2000
Molecularly Dispersed Cobalt Phthalocyanine Mediates Selective and Durable CO2 Reduction in a Membrane Flow Cell
Publisher: Wiley
Date: 28-10-2022
Abstract: High‐rate electrochemical CO 2 ‐to‐CO conversion provides a favorable strategy for carbon neutrality. Molecular catalysts, especially those with isolated metal active centers, are known to be the efficient CO 2 ‐to‐CO electrocatalysts due to their high selectivity and outstanding instinct activity however, the controllable scale‐up synthesis and durable utilization at industrial current densities still remain a challenge. Here, it is developed a molecularly dispersed cobalt phthalocyanine loaded on carbon nanotube for high‐current long‐term CO 2 ‐to‐CO electrolysis. The resultant catalyst exhibits a high CO selectivity with a maximum Faradaic efficiency of 97% and performs a current density of −200 mA cm −2 in a flow cell with a TOF of 83.9 s −1 , which is among the best of CO‐selective electrocatalysts. With a series of impregnation loading experiments, the process of molecular‐dispersion or aggregation is investigated. In addition, the application of selective and durable electrolysis at a current of 0.25 A is realized up to 38.5 h in a scale‐up MEA configuration. Subsequent characterization shows robust durability closely related to the dispersion of CoPc. This study provides a triumph to catalyze commercial‐scale CO production using molecularly dispersed phthalocyanine electrocatalysts.
Photocatalytic and photoelectrocatalytic degradation of small biological compounds: A case study of uridine
Publisher: Elsevier BV
Date: 03-2013
An efficient and low-cost TiO2 compact layer for performance improvement of dye-sensitized solar cells
Publisher: Elsevier BV
Date: 2009
Fabrication of High‐Quality CsBi3I10 Films via a Gas‐Assisted Approach for Efficient Lead‐Free Perovskite Solar Cells
Publisher: Wiley
Date: 31-05-2022
Abstract: Bismuth‐based perovskites are promising candidates for lead‐free and air‐stable photovoltaics. However, the poor surface morphologies and high exciton binding energy of the bismuth‐based perovskites have limited their performances. Herein, the density functional theory calculations unveil that CsBi 3 I 10 possesses favorable optoelectronic properties such as a narrow bandgap, a small effective mass, and relatively high electron mobility. To tackle the poor‐surface morphology problem, the high‐quality CsBi 3 I 10 films are fabricated via gas‐assisted spin‐coating and solvent vapor annealing in ambient conditions. Using the [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM) as the electron acceptor, an optimized inverted CsBi 3 I 10 /PCBM bulk‐heterojunction structure enables a high power conversion efficiency of 1.18% among the CsBi 3 I 10 ‐based perovskite solar cells. The approach exemplified in this work could be useful for designing the high‐performance Bi‐based lead‐free perovskite solar cells.
White matter alterations at pubertal onset
Publisher: Cold Spring Harbor Laboratory
Date: 19-04-2017
DOI: 10.1101/128165
Abstract: Recent neurodevelopmental research supports the contribution of pubertal stage to local and global grey and white matter remodelling. Little is known, however, about white matter microstructural alterations at pubertal onset. This study investigated differences in white matter properties between pre-pubertal and pubertal children using whole brain fixel-based analysis (FBA) of the microscopic density and macroscopic cross-section of fibre bundles. Diffusion-weighted imaging data were acquired for 74 typically developing children (M=10.4, SD=0.43 years, 31 female) at 3.0T (60 diffusion gradient directions, b-value=2800 s/mm 2 ). Group comparisons of fibre density (FD) and fibre cross-section (FC) were made between age-matched pre-pubertal and pubertal groups, and post-hoc analyses were performed on regions of interest (ROIs) defined in the splenium, body and genu of the corpus callosum. Significant fixel-wise differences in FD were observed between the pubertal groups, where the pubertal group had significantly higher FD compared with age-matched pre-pubertal children, localised to the posterior corpus callosum. Post-hoc analyses on mean FD in the corpus callosum ROIs revealed group differences between the pubertal groups in the splenium, but not body or genu. The observed higher apparent fibre density in the splenium suggests that pubertal onset coincides with white matter differences explained by increasing axon diameter. This may be an important effect to account for over pubertal development, particularly for group studies where age-matched clinical and typical populations may be at various stages of puberty.
Evaluating death and activity decay of Anammox bacteria during anaerobic and aerobic starvation
Publisher: Elsevier BV
Date: 06-2018
DOI: 10.1016/J.CHEMOSPHERE.2018.02.171
Abstract: The decreased activity (i.e. decay) of anaerobic ammonium oxidation (Anammox) bacteria during starvation can be attributed to death (i.e. decrease in the amount of viable bacteria) and activity decay (i.e. decrease in the specific activity of viable bacteria). Although they are crucial for the operation of the Anammox process, they have never been comprehensively investigated. This study for the first time experimentally assessed death and activity decay of the Anammox bacteria during 84 days' starvation stress based on ammonium removal rate, Live/Dead staining and fluorescence in-situ hybridization. The anaerobic and aerobic decay rates of Anammox bacteria were determined as 0.015 ± 0.001 d
The soil microbiome at the Gi-FACE experiment responds to a moisture gradient but not to CO2 enrichment
Publisher: Microbiology Society
Date: 09-2016
DOI: 10.1099/MIC.0.000341
Abstract: The soil bacterial community at the Giessen free-air CO2 enrichment (Gi-FACE) experiment was analysed by tag sequencing of the 16S rRNA gene. No substantial effects of CO2 levels on bacterial community composition were detected. However, the soil moisture gradient at Gi-FACE had a significant effect on bacterial community composition. Different groups within the Acidobacteria and Verrucomicrobia phyla were affected differently by soil moisture content. These results suggest that modest increases in atmospheric CO2 may cause only minor changes in soil bacterial community composition and indicate that the functional responses of the soil community to CO2 enrichment previously reported at Gi-FACE are due to factors other than changes in bacterial community composition. The effects of the moisture gradient revealed new information about the relationships between poorly known Acidobacteria and Verrucomicrobia and soil moisture content. This study contrasts with the relatively small number of other temperate grassland free-air CO2 enrichment microbiome studies in the use of moderate CO2 enrichment and the resulting minor changes in the soil microbiome. Thus, it will facilitate the development of further climate change mitigation studies. In addition, the moisture gradient found at Gi-FACE contributes new knowledge in soil microbial ecology, particularly regarding the abundance and moisture relationships of the soil Verrucomicrobia.
A fluorescent quenching performance enhancing principle for carbon nanodot-sensitized aqueous solar cells
Publisher: Elsevier BV
Date: 04-2015
Formation of BNC Coordination to Stabilize the Exposed Active Nitrogen Atoms in g‐C 3 N 4 for Dramatically Enhanced Photocatalytic Ammonia Synthesis Performance
Publisher: Wiley
Date: 20-02-2020
ELECTROCHEMICALLY CONTROLLED TRANSPORT IN A DUAL CONDUCTING POLYMER MEMBRANE SYSTEM
Publisher: Elsevier BV
Date: 1995
Hierarchical Co3O4@N-Doped Carbon Composite as an Advanced Anode Material for Ultrastable Potassium Storage
Publisher: American Chemical Society (ACS)
Date: 20-03-2020
Hollow mesoporous SiO2 sphere nanoarchitectures with encapsulated silver nanoparticles for catalytic reduction of 4-nitrophenol
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6QI00002A
Abstract: Ag@ hm -SiO 2 nanoreactors with the multi-cores/shell configuration have been successfully synthesized via an effective pre-shell ost-core strategy combined with the laser ablation treatment.
ZnO-doped LiFePO4 cathode material for lithium-ion battery fabricated by hydrothermal method
Publisher: Elsevier BV
Date: 09-2013
Impact of Partial Shading on Various PV Array Configurations and Different Modeling Approaches: A Comprehensive Review
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Polarization Engineering of Entangled Photons from a Lithium Niobate Nonlinear Metasurface
Publisher: American Chemical Society (ACS)
Date: 23-08-2023
Multishelled TiO2 Hollow Microspheres as Anodes with Superior Reversible Capacity for Lithium Ion Batteries
Publisher: American Chemical Society (ACS)
Date: 23-10-2014
DOI: 10.1021/NL503378A
Abstract: Herein, uniform multishelled TiO2 hollow microspheres were synthesized, especially 3- and 4-shelled TiO2 hollow microspheres were synthesized for the first time by a simple sacrificial method capable of controlling the shell thickness, intershell spacing, and number of internal multishells, which are achieved by controlling the size, charge, and diffusion rate of the titanium coordination ions as well as the calcination process. Used as anodes for lithium ion batteries, the multishelled TiO2 hollow microspheres show excellent rate capacity, good cycling performance, and high specific capacity. A superior capacity, up to 237 mAh/g with minimal irreversible capacity after 100 cycles is achieved at a current rate of 1 C (167.5 mA/g), and a capacity of 119 mAh/g is achieved at a current rate of 10 C even after 1200 cycles.
Photoelectrochemical Characterization of a Robust TiO2/BDD Heterojunction Electrode for Sensing Application in Aqueous Solutions
Publisher: American Chemical Society (ACS)
Date: 23-12-2009
DOI: 10.1021/LA903706E
Abstract: Titanium dioxide (TiO(2)) and boron-doped diamond (BDD) are two of the most popular functional materials in recent years. In this work, TiO(2) nanoparticles were immobilized onto the BDD electrodes by a dip-coating technique. Continuous and uniform mixed-phase (anatase and rutile) and pure-anatase TiO(2)/BDD electrodes were obtained after calcination processes at 700 and 450 degrees C, respectively. The particle sizes of both types of TiO(2) film range from 20 to 30 nm. In comparison with a TiO(2)/indium tin oxide (ITO) electrode, the TiO(2)/BDD electrode demonstrates a higher photoelectrocatalytic activity toward the oxidation of organic compounds, such as glucose and potassium hydrogen phthalate. Among all the tested TiO(2) electrodes, the mixed-phase TiO(2)/BDD electrode demonstrated the highest photoelectrocatalytic activity, which can be attributed to the formation of the p-n heterojunction between TiO(2) and BDD. The electrode was subsequently used to detect a wide spectrum of organic compounds in aqueous solution using a steady-state current method. An excellent linear relationship between the steady-state photocurrents and equivalent organic concentrations was attained. The steady-state oxidation photocurrents of the mixed-phase TiO(2)/BDD electrode were insensitive to pH in the range of pH 2-10. Furthermore, the electrodes exhibited excellent robustness under strong acidic conditions that the TiO(2)/ITO electrodes cannot stand. These characteristics bestow the mixed-phase TiO(2)/BDD electrode to be a versatile material for the sensing of organic compounds.
DGT measurement of dissolved aluminum species in waters: Comparing chelex-100 and titanium dioxide-based adsorbents
Publisher: American Chemical Society (ACS)
Date: 06-02-2012
DOI: 10.1021/ES203674N
Abstract: Aluminum is acutely toxic, and elevated concentrations of dissolved Al can have detrimental effects on both terrestrial and aquatic ecosystems. Robust analytical methods that can determine environmentally relevant Al fractions accurately and efficiently are required by the environmental monitoring community. A simple, robust passive s ling method, the diffusive gradients in thin films (DGT) technique, was evaluated for the measurement of dissolved Al species in freshwater and marine water using either Chelex-100 or Metsorb (a titanium dioxide-based binding agent) as the adsorbent. Mass vs time DGT deployments at pH 5.05 (Al(3+) and Al(OH)(2+) dominate) and 8.35 (Al(OH)(4)(-) dominates) demonstrated linear uptake of Al (R(2) = 0.989 and 0.988, respectively) for Metsorb. Similar deployments of Chelex-DGT showed linear uptake at pH 5.05 (R(2) = 0.994) however, at pH 8.35 the mass of Al accumulated was 40-70% lower than predicted, suggesting that Chelex-100 is not suitable for Al measurements at high pH. The Metsorb-DGT measurement was independent of pH (5.0-8.5) and ionic strength (0.001-0.7 mol L(-1) NaNO(3)), whereas the Chelex-DGT measurement was only independent of ionic strength at pH 5.0. At pH 8.4, increasing ionic strength led to considerable underestimation (up to 67%) of Al concentration. Deployments of Metsorb-DGT (up to 4 days) in synthetic freshwater (pH range 5.4-8.1) and synthetic seawater (pH 8.15) resulted in linear mass uptakes, and the concentration measured by DGT agreed well with solution concentrations. Conversely, deployment of Chelex-DGT in synthetic seawater and freshwater (pH ≥7.7 Al(OH)(4)(-) dominant species) resulted in a decrease in accumulated mass with increasing deployment time. In situ field evaluations in fresh, estuarine, and marine waters confirmed that Metsorb-DGT was more accurate than Chelex-DGT for the measurement of dissolved Al in typical environmental waters.
Size Modulation of Zirconium-Based Metal Organic Frameworks for Highly Efficient Phosphate Remediation
Publisher: American Chemical Society (ACS)
Date: 07-09-2017
Abstract: Eutrophication of water bodies caused by the excessive phosphate discharge has constituted a serious threat on a global scale. It is imperative to exploit new advanced materials featuring abundant binding sites and high affinity to achieve highly efficient and specific capture of phosphate from polluted waters. Herein, water stable Zr-based metal organic frameworks (MOFs, UiO-66) with rational structural design and size modulation have been successfully synthesized based on a simple solvothermal method for effective phosphate remediation. Impressively, the size of the resulting UiO-66 particles can be effectively adjusted by simply altering reaction time and the amount of acetic acid with the purpose of understanding the crucial effect of structural design on the phosphate capture performance. Representatively, UiO-66 particles with small size demonstrates 415 mg/g of phosphate uptake capacity, outperforming most of the previously reported phosphate adsorbents. Meanwhile, the developed absorbents can rapidly reduce highly concentrated phosphate to below the permitted level in drinking water within a few minutes. More significantly, the current absorbents display remarkable phosphate sorption selectivity against the common interfering ions, which can be attributed to strong affinity between Zr-OH groups in UiO-66 and phosphate species. Furthermore, the spent UiO-66 particles can be readily regenerated and reused for multiple sorption-desorption cycles without obvious decrease in removal performance, rendering them promising sustainable materials. Hence, the developed UiO-66 adsorbents hold significant prospects for phosphate sequestration to mitigate the increasingly eutrophic problems.
Special considerations in the management of adult patients with acute leukaemias and myeloid neoplasms in the COVID-19 era: recommendations from a panel of international experts
Publisher: Elsevier BV
Date: 08-2020
Room temperature ferromagnetic Cr–Ni codoped ZnO diluted magnetic semiconductors synthesized by hydrothermal method under high pulsed magnetic field
Publisher: Elsevier BV
Date: 2015
Formation Mechanism of Freestanding CH3NH3PbI3 Functional Crystals: In Situ Transformation vs Dissolution-Crystallization
Publisher: American Chemical Society (ACS)
Date: 12-2014
DOI: 10.1021/CM5028817
Comparative study of electrochemical behaviour of single-crystalline and polycrystalline LaNi5 alloy electrodes
Publisher: Elsevier BV
Date: 02-1997
Microbial bioremediation of pesticides in agricultural soils: an integrative review on natural attenuation, bioaugmentation and biostimulation
Publisher: Springer Science and Business Media LLC
Date: 14-10-2022
Photoelectrochemical properties and its application of nano-TiO2/boron-doped diamond heterojunction electrode material
Publisher: Asian Journal of Chemistry
Date: 2013
Probing the intracellular organic matters released from the photocatalytic inactivation of bacteria using fractionation procedure and excitation-emission-matrix fluorescence
Publisher: Elsevier BV
Date: 03-2017
DOI: 10.1016/J.WATRES.2016.12.032
Abstract: Photocatalysis provides a "green" and effective strategy for water disinfection. During the photocatalytic disinfection process, intracellular organic matter (IOM) from bacterial cells may be released into the bulk solution. In this study, the role of released IOM in the photocatalytic bacterial inactivation was investigated by fractionation procedure and fluorescence excitation-emission-matrix (EEM) combined with parallel factor analysis (PARAFAC) approaches. The normal bacterial cells treated by TiO
Design of three-dimensional hierarchical TiO2/SrTiO3 heterostructures towards selective CO2 photoreduction
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9QI00350A
Abstract: 3D hierarchical TiO 2 /SrTiO 3 spheres have been constructed by sequential templating approach and exhibit superb photocatalytic activity and remarkable selectivity.
Experimental evaluation on the tribological properties of cassia tora oil by the addition of copper nanoparticles
Publisher: Informa UK Limited
Date: 07-01-2019
A selective etching phenomenon on {001} faceted anatase titanium dioxide single crystal surfaces by hydrofluoric acid
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0CC04848H
Abstract: A selective etching phenomenon on {001} faceted anatase TiO(2) single crystal surfaces by HF and associated etching mechanism are reported. Density functional theory (DFT) calculations reveal that HF stabilizes the grown {001} facets at low concentrations, but selectively destroys the grown {001} facets at high concentrations.
TiO2 cement for high-performance dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA20039G
Abstract: An energy conversion efficiency of 8.31% is reached by using a cemented photoanode for dye-sensitized solar cells, attaining a 31.1% improvement over the standard Degussa P25 s le.
Electrophysiological, cognitive and clinical profiles of at-risk mental state: The longitudinal minds in transition (MinT) study
Publisher: Public Library of Science (PLoS)
Date: 10-02-2017
Contribution of Brain Size to IQ and Educational Underperformance in Extremely Preterm Adolescents
Publisher: Public Library of Science (PLoS)
Date: 09-10-2013
Activation strategies of water-splitting electrocatalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA01680B
Abstract: This review summarizes recent progress in calculation prediction, operando characterization and advanced synthesis to extract and illustrate electrocatalyst activation principles that are widely applicable to guide new catalyst discovery.
A low cost universal photoelectrochemical detector for organic compounds based on photoelectrocatalytic oxidation at a nanostructured TiO2 photoanode
Publisher: Elsevier BV
Date: 06-2011
hcp-phased Ni nanoparticles with generic catalytic hydrogenation activities toward different functional groups
Publisher: Springer Science and Business Media LLC
Date: 02-12-2022
Potassium‐Ion‐Assisted Regeneration of Active Cyano Groups in Carbon Nitride Nanoribbons: Visible‐Light‐Driven Photocatalytic Nitrogen Reduction
Publisher: Wiley
Date: 10-2019
Abstract: As a metal‐free nitrogen reduction reaction (NRR) photocatalyst, g‐C 3 N 4 is available from a scalable synthesis at low cost. Importantly, it can be readily functionalized to enhance photocatalytic activities. However, the use of g‐C 3 N 4 ‐based photocatalysts for the NRR has been questioned because of the elusive mechanism and the involvement of N defects. This work reports the synthesis of a g‐C 3 N 4 photocatalyst modified with cyano groups and intercalated K + ( m CNN), possessing extended visible‐light harvesting capacity and superior photocatalytic NRR activity (NH 3 yield: 3.42 mmol g −1 h −1 ). Experimental and theoretical studies suggest that the ‐C≡N in m CNN can be regenerated through a pathway analogous to Mars van Krevelen process with the aid of the intercalated K + . The results confirm that the regeneration of the cyano group not only enhances photocatalytic activity and sustains the catalytic cycle, but also stabilizes the photocatalyst.
Catalyst-free activation of persulfate by visible light for water disinfection: Efficiency and mechanisms
Publisher: Elsevier BV
Date: 06-2019
DOI: 10.1016/J.WATRES.2019.03.071
Abstract: The development of cost-effective water disinfection methods is highly desired to address the problems caused by outbreak of harmful microorganisms. Sulfate radical (•SO
Lignocellulose Aerogel from Wood-ionic Liquid Solution(1-Allyl-3-methylimidazolium Chloride) under Freezing and Thawing Conditions
Publisher: American Chemical Society (ACS)
Date: 05-04-2011
DOI: 10.1021/BM200205Z
Abstract: This article reports a facile preparation of a lignocellulose aerogel from a solution of wood in an ionic liquid by cyclic freeze-thaw (FT) process. Trema orientalis wood flour was dissolved in 1-allyl-3-methylimidazolium chloride (AMImCl), an effective ionic liquid, and then repeatedly frozen at -20 °C and thawed at 20 °C for several times, and then finally regenerated in water. The hydrogel obtained was solvent-exchanged to acetone, washed with liquid carbon dioxide, and finally dried by releasing the carbon dioxide at critical temperature to obtain the lignocellulose aerogel. The aerogel had an open 3D fibrillar network and could be transformed from nanofibrillar to sheet-like skeletons with hierarchical micro- and nanoscale morphology and porosity by adjusting the FT treatment cycles. The frequency of FT cycles influenced the intensity, specific surface, crystallinity, and thermostability of the aerogel. This research highlights new opportunities for the development of porous and flexible aerogel scaffolds.
Bottom-Up Enhancement of g-C3N4 Photocatalytic H-2 Evolution Utilising Disordering Intermolecular Interactions of Precursor
Publisher: Hindawi Limited
Date: 2014
DOI: 10.1155/2014/149520
Abstract: Disordered intermolecular interaction carbon nitride precursor prepared by water-assisted grinding of dicyandiamide was used for synthesis of g-C 3 N 4 . The final s le possesses much looser structure and provides a broadening optical window for effective light harvesting and charge separation efficiency, which exhibits significantly improved H 2 evolution by photocatalytic water splitting. The bottom-up mechanochemistry method opens new vistas towards the potential applications of weak interactions in the photocatalysis field and may also stimulate novel ideas completely different from traditional ones for the design and optimization of photocatalysts.
Materials Science in Australia
Publisher: Wiley
Date: 05-2020
Geometric and electronic effects of Co@NPC catalyst in chemoselective hydrogenation: Tunable activity and selectivity via N,P co-doping
Publisher: Elsevier BV
Date: 05-2023
TMN4 complex embedded graphene as efficient and selective electrocatalysts for chlorine evolution reactions
Publisher: Elsevier BV
Date: 02-2022
Selective Growth of High‐Density Anatase {101} Twin Boundaries on High‐Energy {001} Facets
Publisher: Wiley
Date: 27-09-2020
Scalable and controllable fabrication of CNTs improved yolk-shelled Si anodes with advanced in operando mechanical quantification
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1EE00639H
Abstract: Scalable and controllable fabrication of CNT-supported yolk-shelled Si/C anodes with advanced in operando mechanical quantification using a new electrochemical transmission electron microscope measurement system.
Rapid-Heating-Triggered in Situ Solid-State Transformation of Amorphous TiO2 Nanotubes into Well-Defined Anatase Nanocrystals
Publisher: American Chemical Society (ACS)
Date: 14-12-2019
Organic phosphorus in the terrestrial environment: a perspective on the state of the art and future priorities
Publisher: Springer Science and Business Media LLC
Date: 06-10-2010
Crystal plane effect of ceria on supported copper catalyst for liquid-phase hydrogenation of unsaturated aldehyde
Publisher: Elsevier BV
Date: 08-2021
Novel Environmental Analytical System based on Combined Biodegradation and Photoelectrocatalytic Detection Principles for Rapid Determination of Organic Pollutants in Wastewaters
Publisher: American Chemical Society (ACS)
Date: 15-01-2014
DOI: 10.1021/ES4031358
Abstract: This work describes the development of a novel biofilm reactor-photoelectrocatalytic chemical oxygen demand (BFR-PeCOD) analytical system for rapid online determination of biodegradable organic matters (BOMs). A novel air bubble s le delivery approach was developed to dramatically enhance the BFR's biodegradation efficiency and extend analytical linear range. Because the air bubble s le delivery invalidates the BOD quantification via the determination of oxygen consumption using dissolved oxygen probe, the PeCOD technique was innovatively utilized to resolve the BOD quantification issue under air bubble s le delivery conditions. The BFR was employed to effectively and efficiently biodegrade organic pollutants under oxygen-rich environment provided by the air bubbles. The BOD quantification was achieved by measuring the COD change (Δ[COD]) of the original s le and the effluent from BFR using PeCOD technique. The measured Δ[COD] was found to be directly proportional to the BOD5 values of the original s le with a slope independent of types and concentrations of organics. The slope was used to convert Δ[COD] to BOD5. The demonstrated analytical performance by BFR-PeCOD system surpasses all reported systems in many aspects. It has demonstrated ability to near real-time, online determining the organic pollution levels of wide range wastewaters without the need for dilution and ongoing calibration. The system possesses the widest analytical liner range (up to 800 mg O2 L(-1)) for BOD analysis, superior long-term stability, high accuracy, reliability, and simplicity. It is an environmentally friendly analytical system that consumes little reagent and requires minimal operational maintenance.
Photothermally induced transparency
Publisher: American Association for the Advancement of Science (AAAS)
Date: 21-02-2020
Abstract: Photothermal-cavity nonlinearity induces a new transparency effect with demonstrated agreement between model and experiment.
Photoelectrochemical behaviour of methanol oxidation at nanoporous TiO(2) film electrodes
Publisher: Elsevier BV
Date: 11-2001
High-throughput split-protein profiling by combining transposon mutagenesis and regulated protein-protein interactions with deep sequencing
Publisher: Elsevier BV
Date: 04-2022
DOI: 10.1016/J.IJBIOMAC.2022.01.173
Abstract: Splitting a protein at a position may lead to self- or assisted-complementary fragments depending on whether two resulting fragments can reconstitute to maintain the native function spontaneously or require assistance from two interacting molecules. Assisted complementary fragments with high contrast are an important tool for probing biological interactions. However, only a small number of assisted-complementary split-variants have been identified due to manual, labour-intensive optimization of a candidate gene. Here, we introduce a technique for high-throughput split-protein profiling (HiTS) that allows fast identification of self- and assisted complementary positions by transposon mutagenesis, a rapamycin-regulated FRB-FKBP protein interaction pair, and deep sequencing. We test this technique by profiling three antibiotic-resistant genes (fosfomycin-resistant gene, fosA3, erythromycin-resistant gene, ermB, and chlor henicol-resistant gene, catI). Self- and assisted complementary fragments discovered by the high-throughput technique were subsequently confirmed by low-throughput testing of in idual split positions. Thus, the HiTS technique provides a quicker alternative for discovering the proteins with suitable self- and assisted-complementary split positions when combining with a readout such as fluorescence, bioluminescence, cell survival, gene transcription or genome editing.
High-Performance Nanoporous TiO2/La2O3 Hybrid Photoanode for Dye-Sensitized Solar Cells
Publisher: American Chemical Society (ACS)
Date: 22-02-2012
DOI: 10.1021/AM2015553
Abstract: An organic lanthanum solution was prepared and used for modifying the nanoporous TiO(2) photoanode for dye-sensitized solar cells (DSSCs). The preliminary characterization results demonstrate that La(2)O(3) was formed on the surface of the TiO(2) photoanodes. The X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses suggest that La(3+) was introduced into the TiO(2) nanocrystalline, while, the scanning electron microscopy (SEM) and tunnelling electron microscopy (TEM) characterizations suggest that a thin La(2)O(3) layer forms on surface of the TiO(2) nanostructure. The La(2)O(3) layer is able to alleviate the electron recombination as a passivation layer. Though the slight decrease in surface areas were induced by the surface modification, the dye loading were maintained, which can be attributed to the formation of strong co-ordination bonding between the dye molecules and the lanthanide. The bonding can also facilitate the electron transfer between the dye molecules and TiO(2) conduction band. Consequently, the open circuit potential and short circuit current were boosted significantly and the overall energy conversion efficiency of the DSSCs was remarkably improved from 6.84% for the control film to 9.67% for the La(3+)-modified film.
Monodisperse Hollow Spheres with Sandwich Heterostructured Shells as High-Performance Catalysts via an Extended SiO2Template Method
Publisher: Wiley
Date: 16-09-2014
Abstract: To improve and extend the SiO2 template method for preparing metal oxide hollow spheres, a general and facile "sol-gel and hydrothermal" method is developed to replace the current "sol-gel, calcination, and base-etching" processes for the construction of well-defined sandwich metal oxide@noble metal NP@metal oxide hollow spheres. As-synthesized hollow spheres exhibit high performances in various catalytic reactions.
La1-xCaxMn1-yAlyO3 perovskites as efficient catalysts for two-step thermochemical water splitting in conjunction with exceptional hydrogen yields
Publisher: Elsevier BV
Date: 06-2017
Synthesis and characterisation of a polyacrylamide-polyacrylic acid copolymer hydrogel for environmental analysis of Cu and Cd
Publisher: Elsevier BV
Date: 07-2002
Interpolation Between W Dopant and Co Vacancy in CoOOH for Enhanced Oxygen Evolution Catalysis
Publisher: Wiley
Date: 18-11-2021
Abstract: Electronic structure engineering via integrating two defect structures with opposite modulation effects holds the key to fully unlocking the power of a catalyst. Herein, an interpolation principle is proposed to activate CoOOH via W doping and Co vacancies for the oxygen evolution reaction. Density functional theory suggests opposite roles for the W dopant and the Co vacancy but a synergy between them in tuning the electronic states of the Co site, leading to near‐ideal intermediate energetics and dramatically lowered catalytic overpotential. Experimental studies confirm the modulation of the electronic structure and validate the greatly enhanced catalytic activity with a small overpotential of 298.5 mV to drive 50 mA cm −2 . The discovery of the interpolation between dopants and vacancies opens up a new methodology to design efficient catalysts for various electrochemical reactions.
Photocatalytic Degradation Characteristics of Different Organic Compounds at TiO2 Nanoporous Film Electrodes with Mixed Anatase/Rutile Phases
Publisher: American Chemical Society (ACS)
Date: 23-11-2006
DOI: 10.1021/ES061509I
Abstract: Nanoporous TiO2 film electrodes with a mixed anatase/ rutile phase were prepared by dip-coating TiO2 nanoparticle colloid onto Indium Tin Oxide (ITO) conducting glass substrates and a subsequent calcination process at 700 degrees C for 16 h. The photocatalytic oxidation of a wide range of organic compounds has been studied using the photoelectrochemical method under the conditions that the photohole capturing step controls the overall photocatalytic processes. The characteristics of the mixed anatase/ rutile phase TiO2 film electrodes were compared with pure anatase phase TiO2 film electrodes to identify the key differences between them. The results revealed that different organic compounds, despite their difference in chemical entities, can be stoichiometrically mineralized at the mixed-phase TiO2 electrode under diffusion-controlled conditions, which is in great contrast to the situation at the pure anatase phase TiO2 electrode. The exceptional ability of the mixed-phase TiO2 electrodes for mineralization of organic compounds and their remarkable resistance to the inhibition by aromatic compounds at higher concentration has been explained by the synergetic effect of the rutile and anatase phases. For this type of mixed phase electrodes, upon absorption of UV light, the electron-transfer pathway from anatase phase to rutile phase facilitates the separation of photoelectron and photohole, extending the lifetime of the photoelectron and photohole.
Evaluation of a titanium dioxide-based DGT technique for measuring inorganic uranium species in fresh and marine waters
Publisher: Elsevier BV
Date: 08-2012
DOI: 10.1016/J.TALANTA.2012.05.012
Abstract: A new diffusive gradients in a thin film (DGT) technique for measuring dissolved uranium (U) in freshwater is reported. The new method utilises a previously described binding phase, Metsorb (a titanium dioxide based adsorbent). This binding phase was evaluated and compared to the well-established Chelex-DGT method. Batch experiments showed quantitative uptake (100±3%) of dissolved U by Metsorb and an elution efficiency of 95% was obtained using a mixed eluent of 1 mol L(-1) NaOH/1 mol L(-1) H(2)O(2). The mass of U accumulated by Metsorb was linear (R(2)≥0.98) with time across the pH range 3.0-8.1, validating the DGT measurement. The measured effective diffusion coefficients were highly dependent on pH, ranging from 2.74-4.81×10(-6)cm(2)s(-1), which were in reasonable agreement with values from the literature. Ionic strength showed no effect on the uptake of U, and thereby on diffusion coefficients, at NaNO(3) concentrations ≤0.01 mol L(-1), but caused the U concentration to be underestimated by 18% and 24% at 0.1 mol L(-1) NaNO(3) and 0.7 mol L(-1) NaNO(3), respectively. Deployment of Metsorb-DGT in synthetic freshwater resulted in reliable measurement of the dissolved U concentration (C(DGT)/C(Sol)=1.05), whereas Chelex-DGT significantly underestimated the dissolved U concentration (C(DGT)/C(Sol)=0.76). Metsorb-DGT was found to give reliable results after 8h deployments in synthetic seawater but experienced competition effects with longer deployments. The Chelex-DGT was unable to measure U at all in synthetic seawater. A field deployment in a freshwater stream (Coomera River) confirmed the utility of the Metsorb-DGT method for measuring U in natural freshwaters, but performance of field deployments may require further evaluation due to the possibility of major changes in uranium speciation with pH and water composition. We recommend a filtered s le, of any water in which DGT measurements are to be made, be used to determine the appropriate diffusion coefficient under controlled laboratory conditions.
Facile synthesis of ultra-thin CoxNi(1-x)/C nano-sheets and their remarkable catalytic properties in 4-nitrophenol reduction
Publisher: Elsevier BV
Date: 08-2018
Modified natural diatomite and its enhanced immobilization of lead, copper and cadmium in simulated contaminated soils
Publisher: Elsevier BV
Date: 05-2015
DOI: 10.1016/J.JHAZMAT.2015.02.052
Abstract: Natural diatomite was modified through facile acid treatment and ultrasonication, which increased its electronegativity, and the pore volume and surface area achieved to 0.211 cm(3) g(-1) and 76.9 m(2) g(-1), respectively. Modified diatomite was investigated to immobilize the potential toxic elements (PTEs) of Pb, Cu and Cd in simulated contaminated soil comparing to natural diatomite. When incubated with contaminated soils at rates of 2.5% and 5.0% by weight for 90 days, modified diatomite was more effective in immobilizing Pb, Cu and Cd than natural diatomite. After treated with 5.0% modified diatomite for 90 days, the contaminated soils showed 69.7%, 49.7% and 23.7% reductions in Pb, Cu and Cd concentrations after 0.01 M CaCl2 extraction, respectively. The concentrations of Pb, Cu and Cd were reduced by 66.7%, 47.2% and 33.1% in the leaching procedure, respectively. The surface complexation played an important role in the immobilization of PTEs in soils. The decreased extractable metal content of soil was accompanied by improved microbial activity which significantly increased (P<0.05) in 5.0% modified diatomite-amended soils. These results suggested that modified diatomite with micro/nanostructured characteristics increased the immobilization of PTEs in contaminated soil and had great potential as green and low-cost amendments.
Unveiling the photoelectrocatalytic inactivation mechanism of Escherichia coli : Convincing evidence from responses of parent and anti-oxidation single gene knockout mutants
Publisher: Elsevier BV
Date: 2016
DOI: 10.1016/J.WATRES.2015.10.003
Abstract: This study investigated photoelectrocatalytic (PEC) inactivation mechanism of bacteria using parental Escherichia coli (E. coli) BW25113 and its isogenic mutants deficient in catalase HPI (katG(-), JW3914-1) and Mn-SOD (sodA(-), JW3879-1). BW25113 in the mid-log phase was less susceptible to PEC inactivation than those in early-log and stationary phases, consistent with the peak activities of catalase and superoxide dismutase (SOD) at mid-log phase (30.6 and 13.0 Unit/ml/OD600). For different strains all in mid-log phase, PEC inactivation efficiency followed the order katG(-) > sodA(-) > BW25113, with the duration of 60, 60 and 90 min for complete inactivation of ∼2 × 10(7) CFU mL(-1) bacteria, respectively. Correspondingly, catalase and SOD levels of BW25113 were also higher than the mutants by 5.9 and 11.7 Unit/mL/OD600, respectively. Reactive oxygen species (ROSs) concentrations in PEC systems revealed that the inactivation performance coincided with H2O2 levels, rather than OH. Moreover, pre-incubation with H2O2 elevated catalase activities and PEC inactivation resistance of BW25113 were positively correlated. The above results indicated that H2O2 was the dominant PEC generated bactericide, and anti-oxidative enzymes especially catalase contributed greatly to the bacterial PEC resistance capacity. Further tests revealed that PEC treatment raised the intracellular ROSs concentration by more than 3 times, due to the permeated H2O2 and its intracellular derivative, OH. However, oxidative stress response of E. coli, such as increased catalase or SOD were not observed, perhaps because the ROSs overwhelmed the bacterial protective capacity. The accumulated ROSs subsequently caused oxidative damages to E. coli cells, including membrane damage, K(+) leakage, and protein oxidation. Compared with BW25113, the mutants experienced damages earlier and at higher levels, confirming the essential roles of catalase and SOD in the bacterial PEC resistance.
Enhanced photocatalytic activity of hierarchical structure TiO2 hollow spheres with reactive (001) facets for the removal of toxic heavy metal Cr(VI)
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA04787G
Abstract: TiO 2 hollow spheres composed of reactive (001) facets were synthesized, and their enhanced Cr( vi ) removal activity was demonstrated.
Associations between dehydroepiandrosterone (DHEA) levels, pituitary volume, and social anxiety in children
Publisher: Elsevier BV
Date: 02-2016
DOI: 10.1016/J.PSYNEUEN.2015.11.004
Abstract: Early timing of adrenarche, associated with relatively high levels of dehydroepiandrosterone (DHEA) and its sulphate (DHEA-S) in children, has been linked with mental health problems, particularly anxiety. However, little is known about possible neurobiological mechanisms underlying this association. The pituitary gland is a key component of the hypothalamic-pituitary-adrenal (HPA) axis, the activation of which triggers the onset of adrenarche. The purpose of this study was to examine the extent to which pituitary gland volume mediated the relationship between levels of DHEA/DHEA-S relative to age (i.e., adrenarcheal timing) and symptoms of anxiety in 95 children (50 female, M age 9.50 years, SD 0.34 years). Relatively high DHEA and DHEA-S (DHEA/S) levels were found to be associated with larger pituitary gland volumes. There was no significant direct effect of relative DHEA/S levels on overall symptoms of anxiety. However, results supported an indirect link between relatively high DHEA/S levels and symptoms of social anxiety, mediated by pituitary gland volume. No sex differences were observed for any relationship. Our findings suggest that neurobiological mechanisms may be partly responsible for the link between relatively early adrenarche and anxiety symptoms in children. One possible mechanism for this finding is that an enlarged pituitary gland in children experiencing relatively advanced adrenarche might be associated with hyper-activity/reactivity of the HPA axis. Further research is needed to understand the role of stress in the link between adrenarcheal timing and HPA-axis function, especially in relation to the development of anxiety symptoms in children and adolescents.
High-efficiency electrosynthesis of urea over bacterial cellulose regulated Pd–Cu bimetallic catalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2EY00038E
Abstract: PdCu/CBC exhibited a remarkable R urea of 763.8 ± 42.8 μg h −1 mg cat. −1 at −0.50 V ( vs. RHE) and an exceptional FE of 69.1 ± 3.8% at −0.40 V ( vs. RHE). Taking advantage of operando spectroscopy characterization, the C–N coupling mechanism was verified.
HACEK Infective Endocarditis: Characteristics and Outcomes from a Large, Multi-National Cohort
Publisher: Public Library of Science (PLoS)
Date: 17-05-2013
Three‐Dimensional N‐doped Porous Carbon Derived from Monosodium Glutamate for Capacitive Deionization and the Oxygen Reduction Reaction
Publisher: Wiley
Date: 23-10-2018
Single-atom Fe with Fe1N3 structure showing superior performances for both hydrogenation and transfer hydrogenation of nitrobenzene
Publisher: Springer Science and Business Media LLC
Date: 15-10-2020
Robust enhanced hydrogen production at acidic conditions over molybdenum oxides-stabilized ultrafine palladium electrocatalysts
Publisher: Springer Science and Business Media LLC
Date: 29-09-2020
Anatase TiO2 Crystal Facet Growth: Mechanistic Role of Hydrofluoric Acid and Photoelectrocatalytic Activity
Publisher: American Chemical Society (ACS)
Date: 07-06-2011
DOI: 10.1021/AM200363P
Abstract: This work reports a facile hydrothermal approach to directly grow anatase TiO(2) crystals with exposed {001} facets on titanium foil substrate by controlling pH of HF solution. The mechanistic role of HF for control growth of the crystal facet of anatase TiO(2) crystals has been investigated. The results demonstrate that controlling solution pH controls the extent of surface fluorination of anatase TiO(2), hence the size, shape, morphology, and {001} faceted surface area of TiO(2) crystals. The theoretical calculations reveal that {001} faceted surface fluorination of anatase TiO(2) can merely occur via dissociative adsorption of HF molecules under acidic conditions while the adsorption of Na(+)F(-) is thermodynamically prohibited. This confirms that the presence of molecular form of HF but not F(-) is essential for preservation of exposed {001} facets of anatase TiO(2). Anatase TiO(2) crystals with exposed {001} facets can be directly fabricated on titanium foil by controlling the solution pH ≤ 5.8. When pH is increased to near neutral and beyond (e.g., pH ≥ 6.6), the insufficient concentration of HF ([HF] ≤ 0.04%) dramatically reduces the extent of surface fluorination, leading to the formation of anatase TiO(2) crystals with {101} facets and titanate nanorods/nanosheets. The anatase TiO(2) nanocrystals with exposed {001} facets exhibits a superior photoelectrocatalytic activity toward water oxidation. The findings of this work clarify the mechanistic role of HF for controlling the crystal facet growth, providing a facile means for massive production of desired nanostructures with high reactive facets on solid substrates for other metal oxides.
C/N Ratio Drives Soil Actinobacterial Cellobiohydrolase Gene Diversity
Publisher: American Society for Microbiology
Date: 05-2015
DOI: 10.1128/AEM.00067-15
Abstract: Cellulose accounts for approximately half of photosynthesis-fixed carbon however, the ecology of its degradation in soil is still relatively poorly understood. The role of actinobacteria in cellulose degradation has not been extensively investigated despite their abundance in soil and known cellulose degradation capability. Here, the ersity and abundance of the actinobacterial glycoside hydrolase family 48 (cellobiohydrolase) gene in soils from three paired pasture-woodland sites were determined by using terminal restriction fragment length polymorphism (T-RFLP) analysis and clone libraries with gene-specific primers. For comparison, the ersity and abundance of general bacteria and fungi were also assessed. Phylogenetic analysis of the nucleotide sequences of 80 clones revealed significant new ersity of actinobacterial GH48 genes, and analysis of translated protein sequences showed that these enzymes are likely to represent functional cellobiohydrolases. The soil C/N ratio was the primary environmental driver of GH48 community compositions across sites and land uses, demonstrating the importance of substrate quality in their ecology. Furthermore, mid-infrared (MIR) spectrometry-predicted humic organic carbon was distinctly more important to GH48 ersity than to total bacterial and fungal ersity. This suggests a link between the actinobacterial GH48 community and soil organic carbon dynamics and highlights the potential importance of actinobacteria in the terrestrial carbon cycle.
Adsorption and oxidation of oxalic acid on anatase TiO2 (001) surface: A density functional theory study
Publisher: Elsevier BV
Date: 09-2015
DOI: 10.1016/J.JCIS.2015.05.016
Abstract: Anatase TiO2 (001) surfaces have attracted great interest for photo-degradation of organic species recently due to their high reactivity. In this work, adsorption properties and oxidation mechanisms of oxalic acid on the anatase TiO2 (001) surface have been theoretically investigated using the first-principles density functional theory. Various possible adsorption configurations are considered by ersifying the connectivity of carboxylic groups with the surface. It is found that the adsorption of oxalic acid on the anatase (001) surface prefer the dissociative states. A novel double-bidentate configuration has been found due to the structural match between oxalic acid and the (001) surface. More charge is transferred from the adsorbed oxalic acid to the surface with the double-bidentate configuration when comparing with other adsorption structures. Thus, there is a positive correlation relationship between the transferred charge amount and the interfacial bond numbers when oxalic acid adsorbs on the anatase TiO2 (001) surface. The adsorption energies with dispersion corrections have demonstrated that the van der Waals interactions play an important role in the adsorption, especially when adsorbates are close to the surface.
The functional anatomy of divided attention in amnestic mild cognitive impairment
Publisher: Oxford University Press (OUP)
Date: 10-02-2005
DOI: 10.1093/BRAIN/AWH413
Abstract: Recent neuroimaging studies have demonstrated changes in brain function in cognitively normal subjects at increased risk of developing Alzheimer's disease. Amnestic mild cognitive impairment (AMCI) carries a high risk of developing into Alzheimer's disease. In AMCI altered cortical activation has been demonstrated during memory tasks, using functional MRI (fMRI). Memory and attention are closely related cognitive functions. It is unclear whether the memory impairment of AMCI is associated with attentional deficits of the sort likely to be revealed by tasks requiring ided attention. Ten older adults (mean age 72 years, range 57-81 years) with AMCI were compared with healthy matched controls on ided attention and passive sensory processing tasks using fMRI. During the ided attention task both groups activated similar regions of left hemispheric prefrontal and extrastriate visual cortex. However, the AMCI group had attenuated prefrontal activation compared with age matched controls. On the passive sensory processing task there was no difference between the AMCI and control groups. We conclude that there are changes in the functional network subserving ided attention in patients with AMCI as reflected in the attenuation of prefrontal cortical activation. These findings have implications for evaluating cognition in AMCI and also for monitoring the effects of future treatments in AMCI.
Two-dimensional carbon leading to new photoconversion processes
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CS60437C
Abstract: This review addresses the recent successes, challenges and perspectives of 2D carbon materials for photoconversion.
{001} facets dominated anatase TiO2: morphology, formation/etching mechanisms and performance
Publisher: Springer Science and Business Media LLC
Date: 23-10-2013
Automated alignment of perioperative MRI scans: A technical note and application in pediatric epilepsy surgery
Publisher: Wiley
Date: 16-05-2016
DOI: 10.1002/HBM.23257
Shrimp-shell derived carbon nanodots as precursors to fabricate Fe,N-doped porous graphitic carbon electrocatalysts for efficient oxygen reduction in zinc–air batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6QI00059B
Abstract: Shrimp-shell derived N-doped carbon nanodots as precursors are used to fabricate Fe, N-doped porous carbon electrocatalysts exhibiting superior ORR activity in zinc–air batteries.
High-performance TiO2 photoanode with an efficient electron transport network for dye-sensitized solar cells
Publisher: American Chemical Society (ACS)
Date: 13-08-2009
DOI: 10.1021/JP9041974
Recent Advances in Perovskite-Based Building-Integrated Photovoltaics
Publisher: Wiley
Date: 23-06-2020
Selective electrocatalytic hydrogenation of nitrobenzene over copper-platinum alloying catalysts: Experimental and theoretical studies
Publisher: Elsevier BV
Date: 12-2021
A nanoparticulate liquid binding phase based DGT device for aquatic arsenic measurement
Publisher: Elsevier BV
Date: 11-2016
DOI: 10.1016/J.TALANTA.2016.06.064
Abstract: A nanomaterials-based DGT device constructed with commercial dialysis membrane as diffusive layer and nanoparticulate Fe3O4 aqueous suspension as binding phase is developed and validated for in situ aquatic arsenic measurement. The Fe3O4NPs binding phase is capable of quantitatively accumulated both As(III) and As(V) species. As(III) and As(V) species coexist in the vast majority of environmental water s les. The large difference in diffusion coefficients of As(III) (DAs(III)=3.05×10(-7)cm(2)s(-1)) and As(V) (DAs(V)=1.63×10(-7)cm(2)s(-1)) makes the accurate DGT determination of total arsenic concentration of s les containing both species difficult. An effective diffusion coefficient (DAs¯=DAs(III)[1/(1+x)]+DAs(V)[x/(1+x)],where,x=As(V)/As(III)) approach is therefore proposed and validated for accurate DGT determination of total arsenic when As(III) and As(V) coexist. The experimental results demonstrate that for s les having As(V)/As(III) ratios between 0.1 and 0.9, the DGT determined total arsenic concentrations using DAs¯are within ±93-99% of that determined by ICP-MS. The general principle demonstrated in this work opens up a new avenue of utilizing functional nanomaterials as DGT binding phase, paving a way for developing new generation nanomaterials-based DGT devices that can be readily produced in massive numbers at low costs, facilitating the widespread use of DGT for large-scale environmental assessment and other applications.
Blue hydrogenated lithium titanate as a high-rate anode material for lithium-ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4TA00556B
Photoelectrochemical characterisation of TiO2 thin films derived from microwave hydrothermally processed nanocrystalline colloids
Publisher: Elsevier BV
Date: 04-2006
Low-Cost Carbon Nanospheres for Efficient Removal of Organic Dyes from Aqueous Solutions
Publisher: American Chemical Society (ACS)
Date: 03-10-2012
DOI: 10.1021/IE300914H
Corpus callosum macro and microstructure in late-life depression
Publisher: Elsevier BV
Date: 11-2017
DOI: 10.1016/J.JAD.2017.06.063
Abstract: Differences in corpus callosum (CC) morphology and microstructure have been implicated in late-life depression and may distinguish between late and early-onset forms of the illness. However, a multimodal approach using complementary imaging techniques is required to disentangle microstructural alterations from macrostructural partial volume effects. 107 older adults were assessed: 55 currently-depressed patients without dementia and 52 controls without cognitive impairment. We investigated group differences and clinical associations in 7 sub-regions of the mid-sagittal corpus callosum using T1 anatomical data, white matter hyperintensity (WMH) quantification and two different diffusion MRI (dMRI) models (multi-tissue constrained spherical deconvolution, yielding apparent fibre density, AFD and diffusion tensor imaging, yielding fractional anisotropy, FA and radial diffusivity, RD). Callosal AFD was lower in patients compared to controls. There were no group differences in CC thickness, surface area, FA, RD, nor whole brain or WMH volume. Late-onset of depression was associated with lower FA, higher RD and lower AFD. There were no associations between any imaging measures and psychotic features or depression severity as assessed by the geriatric depression scale. WMH volume was associated with lower FA and AFD, and higher RD in patients. Patients were predominantly treatment-resistant. Measurements were limited to the mid-sagittal CC. dMRI analysis was performed on a smaller cohort, n=77. AFD was derived from low b-value data. Callosal structure is largely preserved in LLD. WMH burden may impact on CC microstructure in late-onset depression suggesting vascular pathology has additional deleterious effects in these patients.
Highly Electrocatalytic Activity of RuO2 Nanocrystals for Triiodide Reduction in Dye‐Sensitized Solar Cells
Publisher: Wiley
Date: 19-06-2013
Abstract: Dye-sensitized solar cells (DSCs) are promising alternatives to conventional silicon devices because of their simple fabrication procedure, low cost, and high efficiency. Platinum is generally used as a superior counter electrode (CE) material, but the disadvantages such as high cost and low abundance greatly restrict the large-scale application of DSCs. An efficient and sustainable way to overcome the limited supply of Pt is the development of high-efficiency Pt-free CE materials, which should possess both high electrical conductivity and superior electrocatalytic activity simultaneously. Herein, for the first time, a two-step strategy to synthesize ruthenium dioxide (RuO₂) nanocrystals is reported, and it is shown that RuO₂ catalysts exhibit promising electrocatalytic activity towards triiodide reduction, which results in comparable energy conversion efficiency to that of conventional Pt CEs. More importantly, by virtue of first-principles calculations, the catalytic mechanism of electrocatalysis for triiodide reduction on various CEs is investigated systematically and it is found that the electrochemical triiodide reduction reaction on RuO₂ catalyst surfaces can be enhanced significantly, owing to the ideal combination of good electrocatalytic activity and high electrical conductivity.
Reduced Mortality With Partial-Breast Irradiation for Early Breast Cancer: A Meta-Analysis of Randomized Trials
Publisher: Elsevier BV
Date: 10-2016
DOI: 10.1016/J.IJROBP.2016.05.008
Abstract: With earlier detection and more effective treatment, mortality from breast cancer continues to fall and it has become increasingly important to reduce the toxicity of treatments. Partial-breast radiation therapy, which focuses radiation to the tumor bed, may achieve this aim. We analyzed mortality differences in randomized trials of partial-breast irradiation (PBI). We included data from published randomized trials of PBI (alone or as part of a risk-adapted approach) versus whole-breast irradiation (WBI) for invasive breast cancer suitable for breast-conserving therapy. We identified trials using PubMed and Google searches with the terms "partial breast irradiation" OR "intraoperative radiotherapy" OR "IMRT" OR ("accelerated" AND "radiation") AND "randomised/randomized," as well as through discussion with colleagues in the field. We calculated the proportion of patients who had events in each randomized arm at 5 years' follow-up and created a forest plot using Stata, version 14.1. We identified 9 randomized trials of PBI versus WBI in invasive breast cancer 5-year outcomes were available for non-breast cancer mortality in 5 trials (n=4489) and for breast cancer mortality in 4 trials (n=4231). The overall mortality was 4.9%. There was no detectable heterogeneity between the trials for any of the outcomes. There was no difference in the proportion of patients dying of breast cancer (difference, 0.000% [95% confidence interval (CI), -0.7 to +0.7] P=.999). Non-breast cancer mortality with PBI was lower than with WBI (difference, 1.1% [95% CI, -2.1% to -0.2%] P=.023). Total mortality with PBI was also lower than with WBI (difference, 1.3% [95% CI, -2.5% to 0.0%] P=.05). Use of PBI instead of WBI in selected patients results in a lower 5-year non-breast cancer and overall mortality, amounting to a 25% reduction in relative terms. This information should be included when breast-conserving therapy is proposed to a patient.
Accurate Control of Multishelled Co3O4 Hollow Microspheres as High‐Performance Anode Materials in Lithium‐Ion Batteries
Publisher: Wiley
Date: 06-05-2013
Differences in photoelectrocatalytic inactivation processes between E. coli and its isogenic single gene knockoff mutants: Destruction of membrane framework or associated proteins?
Publisher: Elsevier BV
Date: 07-2016
Rational screening low-cost counter electrodes for dye-sensitized solar cells
Publisher: Springer Science and Business Media LLC
Date: 12-03-2013
DOI: 10.1038/NCOMMS2547
Abstract: Dye-sensitized solar cells have attracted intense research attention owing to their ease of fabrication, cost-effectiveness and high efficiency in converting solar energy. Noble platinum is generally used as catalytic counter electrode for redox mediators in electrolyte solution. Unfortunately, platinum is expensive and non-sustainable for long-term applications. Therefore, researchers are facing with the challenge of developing low-cost and earth-abundant alternatives. So far, rational screening of non-platinum counter electrodes has been hamstrung by the lack of understanding about the electrocatalytic process of redox mediators on various counter electrodes. Here, using first-principle quantum chemical calculations, we studied the electrocatalytic process of redox mediators and predicted electrocatalytic activity of potential semiconductor counter electrodes. On the basis of theoretical predictions, we successfully used rust (α-Fe2O3) as a new counter electrode catalyst, which demonstrates promising electrocatalytic activity towards triiodide reduction at a rate comparable to platinum.
Micro/nanostructured porous Fe-Ni binary oxide and its enhanced arsenic adsorption performances
Publisher: Elsevier BV
Date: 11-2015
DOI: 10.1016/J.JCIS.2015.07.038
Abstract: A simple method is presented to synthesize micro/nano-structured Fe-Ni binary oxides based on co-precipitation and subsequent calcination. It has been found that the Fe-Ni binary oxides are composed of the porous microsized aggregates built with nanoparticles. When the atomic ratio of Fe to Ni is 2 to 1 the binary oxide is the micro-scaled aggregates consisting of the ultrafine NiFe2O4 nanoparticles with 3-6nm in size, and shows porous structure with pore diameter of 3nm and a specific surface area of 245m(2)g(-1). Such material is of abundant surface functional groups and has exhibited high adsorption performance to As(III) and As(V). The kinetic adsorption can be described by pseudo-second order model and the isothermal adsorption is subject to Langmuir model. The maximum adsorption capacity on such Fe-Ni porous binary oxide is up to 168.6mgg(-1) and 90.1mgg(-1) for As(III) and As(V), respectively, which are much higher than the arsenic adsorption capacity for most commercial adsorbents. Such enhanced adsorption ability for this material is mainly attributed to its porous structure and high specific surface area as well as the abundant surface functional groups. Further experiments have revealed that the influence of the anions such as sulfate, carbonate, and phosphate, which commonly co-exist in water, on the arsenic adsorption is insignificant, exhibiting strong adsorption selectivity to arsenic. This micro/nano-structured porous Fe-Ni binary oxide is hence of good practicability to be used as a highly efficient adsorbent for arsenic removal from the real arsenic-contaminated waters.
Mechanism of early capacity loss of Ti2Ni hydrogen-storage alloy electrode
Publisher: Elsevier BV
Date: 05-1995
A systematic evaluation of intraoperative white matter tract shift in pediatric epilepsy surgery using high-field MRI and probabilistic high angular resolution diffusion imaging tractography
Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
Date: 05-2017
DOI: 10.3171/2016.11.PEDS16312
Abstract: Characterization of intraoperative white matter tract (WMT) shift has the potential to compensate for neuronavigation inaccuracies using preoperative brain imaging. This study aimed to quantify and characterize intraoperative WMT shift from the global hemispheric to the regional tract-based scale and to investigate the impact of intraoperative factors (IOFs). High angular resolution diffusion imaging (HARDI) diffusion-weighted data were acquired over 5 consecutive perioperative time points (MR 1 to MR 5 ) in 16 epilepsy patients (8 male mean age 9.8 years, range 3.8–15.8 years) using diagnostic and intraoperative 3-T MRI scanners. MR 1 was the preoperative planning scan. MR 2 was the first intraoperative scan acquired with the patient's head fixed in the surgical position. MR 3 was the second intraoperative scan acquired following craniotomy and durotomy, prior to lesion resection. MR 4 was the last intraoperative scan acquired following lesion resection, prior to wound closure. MR 5 was a postoperative scan acquired at the 3-month follow-up visit. Ten association WMT/WMT segments and 1 projection WMT were generated via a probabilistic tractography algorithm from each MRI scan. Image registration was performed through pairwise MRI alignments using the skull segmentation. The MR 1 and MR 2 pairing represented the first surgical stage. The MR 2 and MR 3 pairing represented the second surgical stage. The MR 3 and MR 4 (or MR 5 ) pairing represented the third surgical stage. The WMT shift was quantified by measuring displacements between a pair of WMT centerlines. Linear mixed-effects regression analyses were carried out for 6 IOFs: head rotation, craniotomy size, durotomy size, resected lesion volume, presence of brain edema, and CSF loss via ventricular penetration. The average WMT shift in the operative hemisphere was 2.37 mm (range 1.92–3.03 mm) during the first surgical stage, 2.19 mm (range 1.90–3.65 mm) during the second surgical stage, and 2.92 mm (range 2.19–4.32 mm) during the third surgical stage. Greater WMT shift occurred in the operative than the nonoperative hemisphere, in the WMTs adjacent to the surgical lesion rather than those remote to it, and in the superficial rather than the deep segment of the pyramidal tract. Durotomy size and resection size were significant, independent IOFs affecting WMT shift. The presence of brain edema was a marginally significant IOF. Craniotomy size, degree of head rotation, and ventricular penetration were not significant IOFs affecting WMT shift. WMT shift occurs noticeably in tracts adjacent to the surgical lesions, and those motor tracts superficially placed in the operative hemisphere. Intraoperative probabilistic HARDI tractography following craniotomy, durotomy, and lesion resection may compensate for intraoperative WMT shift and improve neuronavigation accuracy.
Encapsulation of Plasmid DNA by Nanoscale Metal–Organic Frameworks for Efficient Gene Transportation and Expression
Publisher: Wiley
Date: 03-06-2019
Abstract: The intracellular delivery and functionalization of genetic molecules play critical roles in gene-based theranostics. In particular, the delivery of plasmid DNA (pDNA) with safe nonviral vectors for efficient intracellular gene expression has received increasing attention however, it still has some limitations. A facile one-pot method is employed to encapsulate pDNA into zeolitic imidazole framework-8 (ZIF-8) and ZIF-8-polymer vectors via biomimetic mineralization and coprecipitation. The pDNA molecules are found to be well distributed inside both nanostructures and benefit from their protection against enzymatic degradation. Moreover, through the use of a polyethyleneimine (PEI) 25 kD capping agent, the nanostructures exhibit enhanced loading capacity, better pH responsive release, and stronger binding affinity to pDNA. From in vitro experiments, the cellular uptake and endosomal escape of the protected pDNA are greatly improved with the superior ZIF-8-PEI 25 kD vector, leading to successful gene expression with high transfection efficacy, comparable to expensive commercial agents. New cost-effective avenues to develop metal-organic-framework-based nonviral vectors for efficient gene delivery and expression are provided.
Converting Co2+-impregnated g-C3N4 into N-doped CNTs-confined Co nanoparticles for efficient hydrogenation rearrangement reactions of furanic aldehydes
Publisher: Springer Science and Business Media LLC
Date: 05-01-2021
Simultaneously high-rate furfural hydrogenation and oxidation upgrading on nanostructured transition metal phosphides through electrocatalytic conversion at ambient conditions
Publisher: Elsevier BV
Date: 05-2019
Low-temperature surface micro-encapsulation of Ti2Ni hydrogen-storage alloy powders
Publisher: Elsevier BV
Date: 12-1994
Enrichment of SNPs in Functional Categories Reveals Genes Affecting Complex Traits
Publisher: Hindawi Limited
Date: 24-05-2016
DOI: 10.1002/HUMU.23007
Abstract: Genome-wide association studies (GWAS) have indicated potential to identify heritability of common complex phenotypes, but traditional approaches have limited ability to detect hiding signals because single SNP has weak effect size accounting for only a small fraction of overall phenotypic variations. To improve the power of GWAS, methods have been developed to identify truly associated genes by jointly testing effects of all SNPs. However, equally considering all SNPs within a gene might dilute strong signals of SNPs in real functional categories. Here, we observed a consistent pattern on enrichment of significant SNPs in eight functional categories across six phenotypes, with the highest enrichment in coding and both UTR regions while the lowest enrichment in the intron. Based on the pattern of SNP enrichment in functional categories, we developed a new approach for detecting gene associations on traits (DGAT) by selecting the most significant functional category and then using SNPs within it to assess gene associations. The method was found to be robust in type I error rate on simulated data, and to have mostly higher power in detecting associated genes for three different diseases than other methods. Further analysis indicated ability of the DGAT to detect novel genes. The DGAT is available by erver/DGAT.
Self-supported bimodal-pore structured nitrogen-doped carbon fiber aerogel as electrocatalyst for oxygen reduction reaction
Publisher: Elsevier BV
Date: 02-2015
Stable Isolated Metal Atoms as Active Sites for Photocatalytic Hydrogen Evolution
Publisher: Wiley
Date: 08-01-2014
Abstract: The process of using solar energy to split water to produce hydrogen assisted by an inorganic semiconductor is crucial for solving our energy crisis and environmental problems in the future. However, most semiconductor photocatalysts would not exhibit excellent photocatalytic activity without loading suitable co-catalysts. Generally, the noble metals have been widely applied as co-catalysts, but always agglomerate during the loading process or photocatalytic reaction. Therefore, the utilization efficiency of the noble co-catalysts is still very low on a per metal atom basis if no obvious size effect exists, because heterogeneous catalytic reactions occur on the surface active atoms. Here, for the first time, we have synthesized isolated metal atoms (Pt, Pd, Rh, or Ru) stably by anchoring on TiO2 , a model photocatalystic system, by a facile one-step method. The isolated metal atom based photocatalysts show excellent stability for H2 evolution and can lead to a 6-13-fold increase in photocatalytic activity over the metal clusters loaded on TiO2 by the traditional method. Furthermore, the configurations of isolated atoms as well as the originality of their unusual stability were analyzed by a collaborative work from both experiments and theoretical calculations.
Application of a cellulose phosphate ion exchange membrane as a binding phase in the diffusive gradients in thin films technique for measurement of trace metals
Publisher: Elsevier BV
Date: 08-2002
Carbothermal Methods: Highly Dispersed Copper Nanoparticles Supported on Activated Carbon as an Efficient Catalyst for Selective Reduction of Vanillin (Small 36/2018)
Publisher: Wiley
Date: 09-2018
Genetic studies of the role of fatty acid and coenzyme A in photocatalytic inactivation of Escherichia coli
Publisher: Elsevier BV
Date: 09-2012
DOI: 10.1016/J.WATRES.2012.05.033
Abstract: The roles of bacterial cellular components, namely, fatty acid profile and coenzyme A, in photocatalytic inactivation of bacteria were investigated. Escherichia coli BW25113, as a "parental strain", and its isogenic single-gene deletion mutants E. coli JW1081 (fabF(-) mutant) and E. coli JW3942 (coaA(-) mutant) showed different susceptibilities towards photocatalytic inactivation by titanium dioxide (TiO(2), irradiated by UVA l s (λ = 365 nm)). Regulating the fatty acid composition through pre-incubation temperature adjustment demonstrated the crucial role of cell membrane fatty acid profile in bacterial susceptibility towards photocatalytic inactivation, while the lower coenzyme A level in coaA(-) mutant correlated well with its lower susceptibility towards photocatalytic inactivation. Furthermore, transmission electron microscopic study demonstrated the photocatalytic destruction process of bacterial cells. This is the first study using single-gene deletion mutants to explore better understanding of the photocatalytic inactivation mechanism of E. coli.
Structural and photocatalytic degradation characteristics of hydrothermally treated mesoporous TiO2
Publisher: Elsevier BV
Date: 30-11-2008
Dehydrogenation of Ammonia Borane Confined by Low-Density Porous Aromatic Framework
Publisher: American Chemical Society (ACS)
Date: 03-12-2012
DOI: 10.1021/JP308066E
Synthesis of Carbon Nanotube–Anatase TiO2 Sub-micrometer-sized Sphere Composite Photocatalyst for Synergistic Degradation of Gaseous Styrene
Publisher: American Chemical Society (ACS)
Date: 12-11-2012
DOI: 10.1021/AM3016476
Abstract: The carbon nanotube (CNT)-sub-micrometer-sized anatase TiO₂ sphere composite photocatalysts were synthesized by a facile one-step hydrothermal method using titanium tetrafluoride as titanium source and CNTs as structure regulator. Various technologies including X-ray diffraction, UV-visible absorption spectra, N₂ adsorption-desorption, scanning electron microscopy, and transmission electron microscopy were employed to characterize the structure properties of the prepared composite photocatalysts. The results indicated that the composite photocatalysts consisted of CNTs wrapping around the sub-micrometer-sized anatase TiO₂ spheres with controllable crystal facets and that the aggregated particles with average diameter ranged from 200 to 600 nm. The fabricated composite photocatalysts were used to degrade gaseous styrene in this work. As expected, a synergistic effect that remarkably enhancing the photocatalytic degradation efficiency of gaseous styrene by the prepared composite photocatalysts was observed in comparison with that the degradation efficiency using pure anatase TiO₂ and the adsorption of CNTs. Similar results were also confirmed in the decolorization of liquid methyl orange. Further investigation demonstrated that the synergistic effect in the photocatalytic activity was related to the structure of the sub-micrometer-sized anatase TiO₂ spheres and the significant roles of CNTs in the composite photocatalysts. By controlling the content of CNTs, the content of TiO₂ or the temperature during the hydrothermal synthesis process, anatase TiO₂ spheres with controllable crystallite size and dominant crystal facets such as {001}, {101}, or polycrystalline could be obtained, which was beneficial for the increase in the synergistic effect and further enhancement of the photocatalytic efficiencies.
iSyTE:IntegratedSystemsTool forEye Gene Discovery
Publisher: Association for Research in Vision and Ophthalmology (ARVO)
Date: 21-03-2012
DOI: 10.1167/IOVS.11-8839
Nano-confined ammonia borane for chemical hydrogen storage
Publisher: Springer Science and Business Media LLC
Date: 09-02-2012
White Matter Microstructure and Information Processing at the Completion of Chemotherapy-Only Treatment for Pediatric Acute Lymphoblastic Leukemia
Publisher: Informa UK Limited
Date: 21-05-2018
DOI: 10.1080/87565641.2018.1473401
Abstract: Little is known about white matter microstructure and its role in information processing abilities of children treated for acute lymphoblastic leukemia (ALL) early posttreatment. Twenty-one survivors of ALL and 18 controls (7-16 years) underwent neurocognitive assessment. A subs le underwent diffusion-weighted magnetic resonance imaging. The ALL group performed poorer on measures of processing capacity, and had widespread areas of decreased fractional anisotropy and increased radial diffusivity. Significant group by white matter microstructure interactions was found when predicting processing speed. Findings provide evidence for an atypical brain-behavior relationship early posttreatment for childhood ALL. Replication in a larger s le is required.
Improved conductivity of NdFeO3 through partial substitution of Nd by Ca: a theoretical study
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP03941J
Abstract: First-principles theoretical analysis of the electronic structure of Nd x Ca 1−x FeO 3−σ ( x = 0.00, 0.25, 0.50, 0.75 or 1.00, δ = 0.00 or 0.25) was conducted to understand the origin of resistance switching by doping.
Photocatalytic Properties of Graphdiyne and Graphene Modified TiO2: From Theory to Experiment
Publisher: American Chemical Society (ACS)
Date: 30-01-2013
DOI: 10.1021/NN305288Z
Abstract: The chemical structure and electronic properties of two-dimensional (2D) carbon-supported TiO₂, TiO₂-graphdiyne, and TiO₂-graphene composites have been studied by first-principles density functional theory. Calculation results show that TiO₂(001)-graphdiyne composites possess superior charge separation and oxidation properties, having the longest lifetimes of photoexcited carriers among all of the 2D composites containing TiO₂ of different facets. Our experimental results further proved that TiO₂(001)-graphdiyne composites could be a promising photocatalyst. For photocatalytic degradation of methylene blue, the rate constant of the TiO₂(001)-graphdiyne composite is 1.63 ± 0.15 times that of the pure TiO₂(001) and 1.27 ± 0.12 times that of the TiO₂(001)-graphene composite.
Theoretical study of single transition metal atom modified MoP as a nitrogen reduction electrocatalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CP00621D
Abstract: The feasibility of N 2 electroreduction to NH 3 on different single metal atom modified MoP surfaces has been investigated systematically.
Nitrogen-Doped Carbon Nanodots@Nanospheres as An Efficient Electrocatalyst for Oxygen Reduction Reaction
Publisher: Elsevier BV
Date: 05-2015
Carbonized Nanoscale Metal-Organic Frameworks as High Performance Electrocatalyst for Oxygen Reduction Reaction
Publisher: American Chemical Society (ACS)
Date: 03-12-2014
DOI: 10.1021/NN505582E
Photoelectrocatalytic decontamination of oilfield produced wastewater containing refractory organic pollutants in the presence of high concentration of chloride ions
Publisher: Elsevier BV
Date: 16-11-2006
DOI: 10.1016/J.JHAZMAT.2006.05.083
Abstract: The feasibility study of the application of the photoelectrocatalytic decontamination of high saline produced water containing refractory organic pollutants was investigated in the slurry photoelectrocatalytic reactor with nanometer TiO2 particle prepared with sol-gel method using the acetic acid as hydrolytic catalyst. The efficiency of the photoelectrocatalytic decontamination of produced water was determined with both COD removal from the tested wastewater and the decrease of mutagenic activity evaluated by Ames tests. The experimental results showed that the photoelectrocatalysis is a quite efficient process for decontaminating the produced water, although there are high concentration of salt existed in oilfield wastewater. We found that the COD removal efficiencies by photoelectrocatalytic process are much higher than that of by photocatalytic or electrochemical oxidation in idually in the photoelectrocatalytic reactor. The COD removal can be substantially improved by the added H2O2 and the generation of active chlorine from high concentration chlorides in the wastewater. The effects of various operating conditions, such as initial COD concentration, applied cell voltage, catalyst amount and initial pH value of solution, on the photoelectrocatalytic efficiencies, is also investigated in detail. The results showed that when the raw produced wastewater was diluted in a 1:1 (v/v) ratio, there is a highest COD removal efficiency. And the photoelectrocatalytic degradation of organic pollutants in saline water is much favored in acidic solution than that in neutral and/or alkaline solution.
Synergistic catalysis of cluster and atomic copper induced by copper-silica interface in transfer-hydrogenation
Publisher: Springer Science and Business Media LLC
Date: 09-03-2021
Anatase TiO2 microspheres with exposed mirror-like plane {001} facets for high performance dye-sensitized solar cells (DSSCs)
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0CC03196H
Abstract: Anatase TiO(2) microspheres with exposed mirror-like plane {001} facets were successfully synthesized via a facile hydrothermal process. The photoanode composed of TiO(2) microsphere top layer shows an improved DSSCs efficiency owing to the superior light scattering effect of microspheres and excellent light reflecting ability of the mirror-like plane {001} facets.
Vapor-phase hydrothermal synthesis of rutile TiO2 nanostructured film with exposed pyramid-shaped (111) surface and superiorly photoelectrocatalytic performance
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.JCIS.2014.05.012
Abstract: Rutile TiO2 nanostructured film with exposed pyramid-shaped (111) surface was successfully fabricated using metal titanium foil as substrate through a facile vapor-phase hydrothermal method. The fabricated rutile TiO2 film was composed of vertically aligned rod-like structures with diameters ranged from 400 to 700 nm and thickness of ca. 2.0 μm. The obtained rutile TiO2 film as photoanode exhibited excellent photoelectrocatalytic activity toward water oxidation and rhodamine B decolorization under UV illumination, which was more than 3.5 and 1.2 times of that obtained by highly ordered anatase TiO2 nanotube array film photoanode under the same experimental conditions, respectively. The excellent photoelectrocatalytic performance of the rutile TiO2 film photoanode could be due to the superior photoelectron transfer property and the high oxidative capability of {111} crystal facets. The superior photoelectron transfer capability of the photoanodes was manifested by the inherent resistance (R0) of the photoanodes using a simple photoelectrochemical method. The calculated R0 values were 50.5 and 86.2 Ω for the rutile TiO2 nanostructured film and anatase TiO2 nanotube array film, respectively. Lower R0 value of the rutile TiO2 photoanode indicated a superior photoelectron transfer capability owing to good single crystal property of the rod-like rutile nanostructure. Almost identical valence band level (1.94 eV) of the rutile TiO2 nanostructured film and anatase TiO2 nanotube array film (meaning a similar oxidation capability) further confirmed the significant role of photoelectron transfer capability and exposed high-energy {111} crystal facets for improved photoelectrocatalytic performance of the rutile TiO2 nanostructured film photoanode.
Electrode position of polyhedral Cu2O on TiO2 nanotube arrays for enhancing visible light photocatalytic performance
Publisher: Elsevier BV
Date: 08-2011
A Yolk–Shell Structured Silicon Anode with Superior Conductivity and High Tap Density for Full Lithium-Ion Batteries
Publisher: Wiley
Date: 20-05-2019
Abstract: The poor cycling stability resulting from the large volume expansion caused by lithiation is a critical issue for Si-based anodes. Herein, we report for the first time of a new yolk-shell structured high tap density composite made of a carbon-coated rigid SiO
Rational Design of Cobalt‐Platinum Alloy Decorated Cobalt Nanoparticles for One‐Pot Synthesis of Imines from Nitroarenes and Aldehydes
Publisher: Wiley
Date: 22-09-2020
Grey hematite photoanodes decrease the onset potential in photoelectrochemical water oxidation
Publisher: Elsevier BV
Date: 05-2021
Emerging Ru-Co homogeneous-heterogeneous photocatalytic CO2 reduction systems
Publisher: Elsevier BV
Date: 05-2023
Influence of ZnWO4 nanorod aspect ratio on the photocatalytic activity
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CE05256J
Photocatalytic inactivation of Escherichia coli—The roles of genes in β-oxidation of fatty acid degradation
Publisher: Elsevier BV
Date: 05-2016
Polypyrrole poly(2-methoxyaniline-5-sulfonic acid) polymer composite
Publisher: Elsevier BV
Date: 06-1998
A novel technology with precise oxygen-input control: Application of the partial nitritation-anammox process
Publisher: Elsevier BV
Date: 10-2020
Adsorption-regulated precise synthesis of atomically-dispersed bimetallic Fe-Co sites on carbon for electrocatalytic nitrogen reduction reaction
Publisher: Research Square Platform LLC
Date: 28-09-2021
DOI: 10.21203/RS.3.RS-941672/V1
Abstract: The intriguing features of single-atom catalysts (SACs) could bring catalysis into a new paradigm, however, controllably synthesising SACs with desired SA loadings and coordination forms are challenging. Here, we report an adsorption-regulated approach to precisely control the synthesis of bimetallic Fe-Co SAs on carbon. Bacterial cellulose (BC) is utilised as an adsorption regulator to controllably impregnate Fe3+/Co2+ on BC and through carbonisation to anchor Fe-Co SAs on BC-derived carbon via bimetallic [(O-C2)3Fe-Co(O-C2)3] coordination with desired Fe/Co contents and atomic ratios. Under electrocatalytic nitrogen reduction reaction (NRR) conditions, [(O-C2)3Fe-Co(O-C2)3] is operando transformed to [(O-C2)3Fe-Co(O-C)C2] that promotes and sustains NRR performance. A superb ammonia yield of 574.8 ± 35.3 μg h-1 mgcat.-1 with an exceptional faradaic efficiency of 73.2 ± 4.6% are obtained from an electrocatalyst with the highest bimetallic Fe-Co site density. The exemplified synthetic approach would be of generically applicable to controllably anchor SAs on carbon that enables meaningfully investigate and rationally design SACs.
Triphasic 2D Materials by Vertically Stacking Laterally Heterostructured 2H‐/1T′‐MoS2 on Graphene for Enhanced Photoresponse
Publisher: Wiley
Date: 11-05-2017
Core–Shell Palladium Nanoparticle@Metal–Organic Frameworks as Multifunctional Catalysts for Cascade Reactions
Publisher: American Chemical Society (ACS)
Date: 27-01-2014
DOI: 10.1021/JA411468E
Abstract: Uniform core-shell Pd@IRMOF-3 nanostructures, where single Pd nanoparticle core is surrounded by amino-functionalized IRMOF-3 shell, are prepared by a facile mixed solvothermal method. When used as multifunctional catalysts, the Pd@IRMOF-3 nanocomposites exhibit high activity, enhanced selectivity, and excellent stability in the cascade reaction. Both experimental evidence and theoretical calculations reveal that the high catalytic performance of Pd@IRMOF-3 nanocomposites originates from their unique core-shell structures.
Structure, reactivity, photoactivity and stability of Ti-O based materials: a theoretical comparison
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2CP23143C
Abstract: Ti-O based materials have attracted great attention recently for their potential applications in clean energy generation and environment remediation. To screen Ti-O based materials for specific applications, the atomic-level understanding of the subtle discrepancy of their properties is of paramount importance. In this regard, the density functional theory computations have been performed to systematically compare the physicochemical properties of three selected Ti-O based materials: anatase titanium dioxides, sodium trititanates and sodium hexatitanates. Due to their structure discrepancy, sodium trititanates show the highest chemical reactivity. However, titanium dioxides are found to be the most photoactive materials. The reactivity and photoactivity of sodium hexatitanates fall between those of titanium dioxide and sodium trititanates. In the meantime, our energetic analysis also confirms that the thermal stabilities of Ti-O based materials are strongly dependent on the acid-base conditions. Titanium dioxides are preferred under acidic conditions, while titanates are more stable in basic solutions.
Enhanced CO2 electroreduction performance over Cl-modified metal catalysts
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA02223F
Abstract: Cl-modified metal catalysts exhibit excellent CO 2 electroreduction performance, attributed to efficient electron transfer to CO 2 on Cl − sites.
Optimization of performance and emission parameters of direct injection diesel engine fuelled with pongamia methyl esters-response surface methodology approach
Publisher: Elsevier BV
Date: 12-2018
Cross-Linked g-C3N4/rGO Nanocomposites with Tunable Band Structure and Enhanced Visible Light Photocatalytic Activity
Publisher: Wiley
Date: 30-04-2013
Abstract: Cross-linked rather than non-covalently bonded graphitic carbon nitride (g-C3 N4 )/reduced graphene oxide (rGO) nanocomposites with tunable band structures have been successfully fabricated by thermal treatment of a mixture of cyanamide and graphene oxide with different weight ratios. The experimental results indicate that compared to pure g-C3 N4 , the fabricated CN/rGO nanocomposites show narrowed bandgaps with an increased in the rGO ratio. Furthermore, the band structure of the CN/rGO nanocomposites can be readily tuned by simply controlling the weight ratio of the rGO. It is found that an appropriate rGO ratio in nanocomposite leads to a noticeable positively shifted valence band edge potential, meaning an increased oxidation power. The tunable band structure of the CN/rGO nanocomposites can be ascribed to the formation of C-O-C covalent bonding between the rGO and g-C3 N4 layers, which is experimentally confirmed by Fourier transform infrared (FT-IR) and X-ray photoelectron (XPS) data. The resulting nanocomposites are evaluated as photocatalysts by photocatalytic degradation of rhodamine B (RhB) and 4-nitrophenol under visible light irradiation (λ > 400 nm). The results demonstrate that the photocatalytic activities of the CN/rGO nanocomposites are strongly influenced by rGO ratio. With a rGO ratio of 2.5%, the CN/rGO-2.5% nanocomposite exhibits the highest photocatalytic efficiency, which is almost 3.0 and 2.7 times that of pure g-C3 N4 toward photocatalytic degradation of RhB and 4-nitrophenol, respectively. This improved photocatalytic activity could be attributed to the improved visible light utilization, oxidation power, and electron transport property, due to the significantly narrowed bandgap, positively shifted valence band-edge potential, and enhanced electronic conductivity.
Local atomic structure modulations activate metal oxide as electrocatalyst for hydrogen evolution in acidic water
Publisher: Springer Science and Business Media LLC
Date: 19-08-2015
DOI: 10.1038/NCOMMS9064
Abstract: Modifications of local structure at atomic level could precisely and effectively tune the capacity of materials, enabling enhancement in the catalytic activity. Here we modulate the local atomic structure of a classical but inert transition metal oxide, tungsten trioxide, to be an efficient electrocatalyst for hydrogen evolution in acidic water, which has shown promise as an alternative to platinum. Structural analyses and theoretical calculations together indicate that the origin of the enhanced activity could be attributed to the tailored electronic structure by means of the local atomic structure modulations. We anticipate that suitable structure modulations might be applied on other transition metal oxides to meet the optimal thermodynamic and kinetic requirements, which may pave the way to unlock the potential of other promising candidates as cost-effective electrocatalysts for hydrogen evolution in industry.
Facile synthesis of N, P co-doped carbon encapsulated Ni catalyst for green production of cyclopentanone from biomass derivative furfural
Publisher: Elsevier BV
Date: 07-2022
Determination of Iodide via Direct Fluorescence Quenching at Nitrogen-Doped Carbon Quantum Dot Fluorophores
Publisher: American Chemical Society (ACS)
Date: 15-11-2013
DOI: 10.1021/EZ400137J
Different brain networks underlying intelligence in Autism Spectrum Disorders
Publisher: Cold Spring Harbor Laboratory
Date: 30-05-2017
DOI: 10.1101/143891
Abstract: There has been sustained clinical and cognitive neuroscience research interest in how network correlates of brain-behaviour relationships might be altered in Autism Spectrum Disorders (ASD) and other neurodevelopmental disorders. As previous work has mostly focused on adults, the nature of whole-brain connectivity networks underlying intelligence in pediatric cohorts with abnormal neurodevelopment requires further investigation. We used network-based statistics (NBS) to examine the association between resting-state functional Magnetic Resonance Imaging (fMRI) connectivity and fluid intelligence ability in male children ( n =50) with Autism Spectrum Disorders (ASD M =10.45, SD =1.58 years and in controls ( M =10.38, SD =0.96 years) matched on fluid intelligence performance, age and sex. Repeat analyses were performed in independent sites for validation and replication. Despite being equivalent on fluid intelligence ability to strictly matched neurotypical controls, boys with ASD displayed a subnetwork of significantly increased associations between functional connectivity and fluid intelligence. Between-group differences remained significant at higher edge thresholding, and results were validated in independent-site replication analyses in an equivalent age and sex-matched cohort with ASD. Regions consistently implicated in atypical connectivity correlates of fluid intelligence in ASD were the angular gyrus, posterior middle temporal gyrus, occipital and temporo-occipital regions. Development of fluid intelligence neural correlates in young ASD males is aberrant, with an increased strength in intrinsic connectivity association during childhood. Alterations in whole-brain network correlates of fluid intelligence in ASD may be a compensatory mechanism that allows equal task performance to neurotypical peers.
Associations between early adrenarche, affective brain function and mental health in children
Publisher: Oxford University Press (OUP)
Date: 11-02-2014
DOI: 10.1093/SCAN/NSV014
A Hierarchical Z‑Scheme α‐Fe2O3/g‐C3N4 Hybrid for Enhanced Photocatalytic CO2 Reduction
Publisher: Wiley
Date: 19-01-2018
Abstract: The challenge in the artificial photosynthesis of fossil resources from CO
Neuroimaging in cannabis use: a systematic review of the literature
Publisher: Cambridge University Press (CUP)
Date: 23-07-2009
DOI: 10.1017/S0033291709990729
Abstract: We conducted a systematic review to assess the evidence for specific effects of cannabis on brain structure and function. The review focuses on the cognitive changes associated with acute and chronic use of the drug. We reviewed literature reporting neuroimaging studies of chronic or acute cannabis use published up until January 2009. The search was conducted using Medline, EMBASE, LILACS and PsycLIT indexing services using the following key words: cannabis, marijuana, delta-9-tetrahydrocannabinol, THC, cannabidiol, CBD, neuroimaging, brain imaging, computerized tomography, CT, magnetic resonance, MRI, single photon emission tomography, SPECT, functional magnetic resonance, fMRI, positron emission tomography, PET, diffusion tensor MRI, DTI-MRI, MRS and spectroscopy. Sixty-six studies were identified, of which 41 met the inclusion criteria. Thirty-three were functional (SPECT/PET/fMRI) and eight structural (volumetric/DTI) imaging studies. The high degree of heterogeneity across studies precluded a meta-analysis. The functional studies suggest that resting global and prefrontal blood flow are lower in cannabis users than in controls. The results from the activation studies using a cognitive task are inconsistent because of the heterogeneity of the methods used. Studies of acute administration of THC or marijuana report increased resting activity and activation of the frontal and anterior cingulate cortex during cognitive tasks. Only three of the structural imaging studies found differences between users and controls. Functional neuroimaging studies suggest a modulation of global and prefrontal metabolism both during the resting state and after the administration of THC/marijuana cigarettes. Minimal evidence of major effects of cannabis on brain structure has been reported.
Microwave-Assisted Fabrication of Nanoparticulate TiO2 Microspheres for Synergistic Photocatalytic Removal of Cr(VI) and Methyl Orange
Publisher: American Chemical Society (ACS)
Date: 23-01-2014
DOI: 10.1021/AM405607H
Abstract: High yield production of micro/nanostructured nanoparticulate TiO2 microspheres (NTMs) via a facile microwave-assisted hydrothermal approach was investigated. The rapid and uniform microwave heating could reduce the reaction time to 30 min, an order of magnitude shorter than that of conventional hydrothermal methods. The characterization data confirmed that the resultant NTMs were highly uniform in size, having an average diameter of ∼0.5 μm. The obtained NTMs were found to be constructed by well-crystallized anatase phase nanoparticles ranging from 5 to 10 nm that can be readily controlled by the microwave radiation temperature. Nitrogen sorption isotherm analysis revealed that the obtained NTMs possessed abundant mesoporous structures with a high specific surface area of 124 m(2) g(-1). An in situ self-aggregation formation process under controllable pH in presence of urea was proposed. The results obtained from the application of NTMs for simultaneous photocatalytic decontamination of Cr(VI) and methyl orange (MO) demonstrated a strong synergistic effect that dramatically enhanced both Cr(VI) reduction and MO oxidation removal efficiencies. This work not only enriched the synthesis methods of the micro/nanostructured TiO2, but also provided a new means to improve the photocatalytic efficiency via structural-induced synergistic effect, applicable to the other catalysis systems.
Dually Ordered Porous TiO2‐rGO Composites with Controllable Light Absorption Properties for Efficient Solar Energy Conversion
Publisher: Wiley
Date: 22-11-2016
Abstract: Quadruple-layered TiO
Ultrafine nickel-cobalt alloy nanoparticles incorporated into three-dimensional porous graphitic carbon as an electrode material for supercapacitors
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA06022F
Abstract: A facile method was developed to synthesize ultrafine Ni–Co alloy nanoparticles embedded into 3D porous graphitic carbon, an excellent electrode material for supercapacitors.
β-Arsenene Monolayer: A Promising Electrocatalyst for Anodic Chlorine Evolution Reaction
Publisher: MDPI AG
Date: 05-03-2022
Abstract: Materials innovation plays an essential role to address the increasing demands of gaseous chlorine from anodic chlorine evolution reaction (CER) in chlor-alkali electrolysis. In this study, two-dimensional (2D) semiconducting group-VA monolayers were theoretically screened for the electrochemical CER by means of the density functional theory (DFT) method. Our results reveal the monolayered β-arsenene has the ultralow thermodynamic overpotential of 0.068 V for CER, which is close to that of the commercial Ru/Ir-based dimensionally stable anode (DSA) of 0.08 V @ 10 mA cm−2 and 0.13 V from experiments and theory, respectively. The change of CER pathways via Cl* intermediate on 2D β-arsenene also efficiently suppresses the parasitical oxygen gas production because of a high theoretical oxygen evolution reaction (OER) overpotential of 1.95 V. Our findings may therefore expand the scope of the electrocatalysts design for CER by using emerging 2D materials.
Dense TiO2 thin film: Photoelectrochemical and photocatalytic properties
Publisher: Inderscience Publishers
Date: 2007
Comparative Analysis of Wind Power Energy Potential at Two Coastal Locations in Bangladesh
Publisher: Springer Science and Business Media LLC
Date: 30-12-2015
Bioinspired Synthesis of ZnS Supraparticles toward Photoinduced Dechlorination of 2,2′,4,4′,5,5′‐Hexachlorobiphenyl
Publisher: Wiley
Date: 31-05-2013
Cu doping in CeO2 to form multiple oxygen vacancies for dramatically enhanced ambient N2 reduction performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CC00123A
Abstract: Cu doping in CeO 2 nanorods can effectively induce formation of multiple oxygen vacancies around the Cu doping sites, dramatically facilitating the N 2 reduction performance under ambient conditions.
White matter abnormalities in pediatric obsessive-compulsive disorder
Publisher: Elsevier BV
Date: 08-2013
DOI: 10.1016/J.PSCYCHRESNS.2013.04.003
Abstract: Diffusion tensor imaging (DTI) has been useful in allowing us to examine the nature and extent of neuronal disruption associated with obsessive-compulsive disorder (OCD). However, little is known about the underlying brain structure in OCD. Diffusion-weighted magnetic resonance imaging was performed in 16 children with OCD and 22 typically developing children. Tract-based spatial statistics (TBSS) was used to compare the microstructure of white-matter tracts of OCD children with those of typically developing children. Correlation/regression analyses were also performed on each diffusion measure in order to detect any correlation of white-matter microstructure with scales of symptom severity. Analysis revealed significantly greater axial diffusivity in both the genu and the splenium of the corpus callosum in the control compared to the OCD group these regions consecutively connect bilateral medial frontal regions and bilateral parietal regions. Secondly, correlation and voxel-based regression analysis revealed that lower axial diffusion correlated with greater severity of symptoms within the OCD group, as measured by the Child Behaviour Checklist-Obsessive Compulsive Scale (CBCL-OCS). The findings demonstrated a correlation of axial diffusivity with severity of symptoms in children with OCD. DTI may provide novel ways to help reveal the relationships between clinical symptoms and altered brain regions.
A Uniquely Configured Acetylcholinesterase-Lecithin Biomimetic Sensing Structure at Cyclohexane/Water Interface for Electrochemical Determination of Fenthion in Organic Solvent
Publisher: Wiley
Date: 08-04-2010
Enhanced Desalination Performance by a Novel Archimedes Spiral Flow Channel for Flow-Electrode Capacitive Deionization
Publisher: American Chemical Society (ACS)
Date: 03-2022
Lignosulfonate functionalized g-C3N4/carbonized wood sponge for highly efficient heavy metal ion scavenging
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0TA00382D
Abstract: A 3D hierarchical LS-C 3 N 4 /CWS monolith has been successfully fabricated for highly efficient heavy metal ion scavenging in both static and continuous-flow modes.
Roadmap on structured waves
Publisher: IOP Publishing
Date: 30-08-2023
Abstract: Structured waves are ubiquitous for all areas of wave physics, both classical and quantum, where the wavefields are inhomogeneous and cannot be approximated by a single plane wave. Even the interference of two plane waves, or of a single inhomogeneous (evanescent) wave, provides a number of nontrivial phenomena and additional functionalities as compared to a single plane wave. Complex wavefields with inhomogeneities in the litude, phase, and polarization, including topological––––– structures and singularities, underpin modern nanooptics and photonics, yet they are equally important, e.g. for quantum matter waves, acoustics, water waves, etc. Structured waves are crucial in optical and electron microscopy, wave propagation and scattering, imaging, communications, quantum optics, topological and non-Hermitian wave systems, quantum condensed-matter systems, optomechanics, plasmonics and metamaterials, optical and acoustic manipulation, and so forth. This Roadmap is written collectively by prominent researchers and aims to survey the role of structured waves in various areas of wave physics. Providing background, current research, and anticipating future developments, it will be of interest to a wide cross-disciplinary audience.
Integrating Sugar and Dopamine into One Polymer: Controlled Synthesis and Robust Surface Modification
Publisher: Wiley
Date: 12-2016
Abstract: Glycopolymers attached to a surface possess the ability to bind to certain carbohydrate binding proteins in a highly specific manner, and because of this, the fabrication of glycopolymer-modified surfaces has evolved as an effective route toward bioresponsive systems. Poly(N-3,4-dihydroxybenzenethyl methacrylamide-co-2-(methacrylamido) glucopyranose) copolymers, containing sugar and catechol functionalities, are for the first time successfully prepared in a well-controlled manner via room temperature single-electron transfer initiation and propagation through radical addition fragmentation chain transfer technique. The polymerization behavior is investigated and it presents controlled features with first-order kinetics and linear relationships between molecular weights and monomer conversions. Moreover, the copolymers are used to modify different types of surfaces (silicon, steel, and plastic), the properties of the surfaces and the specific lectin-binding abilities are investigated by a combination of water contact angle, Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectra, scanning electron microscopy with energy dispersive X-ray (SEM/EDX), atomic force microscopy, and confocal microscope measurements.
Photocatalysis at Nanostructured Titania for Sensing Applications
Publisher: Wiley
Date: 13-02-2013
Correlation between Mechanical Strength of Amorphous TiO2 Nanotubes and Their Solid State Crystallization Pathways
Publisher: Wiley
Date: 16-10-2018
Studies on the performance of Ti2Ni1-xAlx hydrogen storage alloy electrodes
Publisher: Elsevier BV
Date: 1996
Efficient Synthesis of Furfuryl Alcohol from H2-Hydrogenation/Transfer Hydrogenation of Furfural Using Sulfonate Group Modified Cu Catalyst
Publisher: American Chemical Society (ACS)
Date: 08-02-2017
Room temperature production of graphene oxide with thermally labile oxygen functional groups for improved lithium ion battery fabrication and performance
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA02244A
Abstract: We report a room-temperature synthesis method to produce graphene oxide with thermally-labile oxygen functional groups.
New Insight into the Role of Gold Nanoparticles in Au@CdS Core–Shell Nanostructures for Hydrogen Evolution
Publisher: Wiley
Date: 11-08-2014
A novel low density metal–organic framework with pcu topology by dendritic ligand
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1CC12891D
Abstract: A novel low density two-fold interpenetrated MOF-5 analogue with pcu topology, JUC-100, was designed and prepared successfully. It can be regarded as MOF-5 in which half of the Zn(4)O(CO(2))(6) units are replaced by organic 1,3,5-triphenylbenzene segments. JUC-100 exhibits H(2) uptake ability comparable to interpenetrated MOF-5, but relatively low initial isosteric heat of adsorption.
Soil nitrogen pools and turnover in native woodland and managed pasture soils
Publisher: Elsevier BV
Date: 06-2015
Water-soluble inorganic photocatalyst for overall water splitting
Publisher: Elsevier BV
Date: 07-2017
Fast and cost-effective room temperature synthesis of high quality graphene oxide with excellent structural intactness
Publisher: Elsevier BV
Date: 09-2020
Target synthesis of a novel porous aromatic framework and its highly selective separation of CO2 /CH4
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CC38474H
Abstract: A novel porous aromatic framework based on tetra-(4-anilyl)-methane and cyanuric chloride has been designed and synthesized successfully, which possesses permanent porosity and high selectivity of CO2 towards CH4.
White matter alterations at pubertal onset
Publisher: Elsevier BV
Date: 08-2017
In Situ Synthesis of Highly Dispersed Cu–Co Bimetallic Nanoparticles for Tandem Hydrogenation/Rearrangement of Bioderived Furfural in Aqueous-Phase
Publisher: American Chemical Society (ACS)
Date: 09-10-2018
Synergistic photocatalytic inactivation mechanisms of bacteria by graphene sheets grafted plasmonic Ag-AgX (X = Cl, Br, I) composite photocatalyst under visible light irradiation
Publisher: Elsevier BV
Date: 08-2016
DOI: 10.1016/J.WATRES.2016.04.055
Abstract: By coupling graphene sheet and plasmonic photocatalysis technologies, a series of AgAgX/RGOs (X = Cl, Br, I RGO = reduced graphene oxide) composites were prepared and found to be efficient antimicrobial agents for water disinfection upon visible light. Attributed to the efficient charge transfer by RGO sheets, the optimum AgAgBr/0.5% RGO could completely inactivate 2 × 10(7) cfu mL(-1) of Escherichia coli within 8 min, much faster than bare AgAgBr within 35 min. The synergistic antimicrobial mechanism of AgAgBr/0.5% RGO was studied by Ag(+) ions release evaluation, radical scavengers study, and radical determination. The enhanced photocatalytic activity of irradiated AgAgBr/0.5% RGO originated from the synergistic activities of its three components including Ag, AgBr and RGO, and the proposed mechanisms contained enhanced attraction by RGO followed by two pathways: primary oxidative stress caused by plasma induced reactive species like H2O2 and bactericidal effect of released Ag(+) ions. Furthermore, characterization of E. coli cells using SEM, fluorescent microscopy, and cytoplasmic substance leakage illustrated that VL irradiated AgAgBr/0.5% RGO could not only cause metabolic dysfunction but also destroy the cell envelope and biomolecular, while irradiated Ag(+) ions play a differential bactericidal action with a limited metabolic injury and no cell-membrane damage. The present work provides an efficient water disinfection technology and also opens a new idea in studying the antimicrobial mechanism of plasmonic photocatalyst.
A functional MRI study of working memory task in euthymic bipolar disorder: evidence for task‐specific dysfunction
Publisher: Wiley
Date: 12-11-2004
DOI: 10.1111/J.1399-5618.2004.00147.X
Abstract: Even when euthymic bipolar disorder patients can have persistent deficits in working memory, but the neural basis of this deficit remains unclear. We undertook an functional magnetic resonance imaging investigation of euthymic bipolar disorder patients performing two working memory paradigms the two-back and Sternberg tasks, selected to examine the central executive and the phonological loop respectively. We hypothesized that neuronal dysfunction would be specific to the network underlying the executive rather than the phonological loop component of working memory. Twelve right-handed euthymic bipolar I males receiving lithium carbonate monotherapy were matched with 12 controls. The two-back task comprised a single working memory load contrasted with baseline vigilance condition. The Sternberg paradigm used a parametric design incorporating variable working memory load with fixed delay between presentation of an array of items to be remembered and a target item. Functional activation data were acquired during performance of the tasks and were analysed to produce brain activation maps representing significant group differences in activation (ANOVA). Load-response curves were derived from the Sternberg task data set. There were no significant between-group differences (t-test) in performance of the two-back task, or in 2 x 5 group by memory load ANOVA for the performance data from Sternberg task. In the two-back task, compared with controls bipolar disorder patients showed reductions in bilateral frontal, temporal and parietal activation, and increased activations with the left precentral, right medial frontal and left supramarginal gyri. No between-group differences were observed in the Sternberg task at any working memory load. Our findings support the notion that, in euthymic bipolar disorder, failure to engage fronto-executive function underpins the core neuropsychological deficits.
A reliable sewage quality abnormal event monitoring system
Publisher: Elsevier BV
Date: 09-2017
DOI: 10.1016/J.WATRES.2017.05.040
Abstract: With closing water loop through purified recycled water, wastewater becomes a part of source water, requiring reliable wastewater quality monitoring system (WQMS) to manage wastewater source and mitigate potential health risks. However, the development of reliable WQMS is fatally constrained by severe contamination and biofouling of sensors due to the hostile analytical environment of wastewaters, especially raw sewages, that challenges the limit of existing sensing technologies. In this work, we report a technological solution to enable the development of WQMS for real-time abnormal event detection with high reliability and practicality. A vectored high flow hydrodynamic self-cleaning approach and a dual-sensor self-diagnostic concept are adopted for WQMS to effectively encounter vital sensor failing issues caused by contamination and biofouling and ensure the integrity of sensing data. The performance of the WQMS has been evaluated over a 3-year trial period at different sewage catchment sites across three Australian states. It has demonstrated that the developed WQMS is capable of continuously operating in raw sewage for a prolonged period up to 24 months without maintenance and failure, signifying the high reliability and practicality. The demonstrated WQMS capability to reliably acquire real-time wastewater quality information leaps forward the development of effective wastewater source management system. The reported self-cleaning and self-diagnostic concepts should be applicable to other online water quality monitoring systems, opening a new way to encounter the common reliability and stability issues caused by sensor contamination and biofouling.
The morphology and optical properties of ZnO crystals fabricated by hydrothermal method under pulsed magnetic field
Publisher: Wiley
Date: 12-08-2013
Introduction [Advances in Photocatalytic Disinfection]
Publisher: Springer Berlin Heidelberg
Date: 22-11-2017
The electrochemical corrosion of an air thermally-treated carbon fiber cloth electrocatalyst with outstanding oxygen evolution activity under alkaline conditions
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9CC00398C
Abstract: An air thermally-treated carbon fiber cloth CFC-450 with a low CO content exhibits excellent OER activity. In addition, an electrochemical corrosion phenomenon was observed.
Corrigendum to “Microbial community structure mediates response of soil C decomposition to litter addition and warming” [Soil Biol. Biochem. 80 175–188]
Publisher: Elsevier BV
Date: 04-2015
Direct growth of hierarchically structured titanate nanotube filtration membrane for removal of waterborne pathogens
Publisher: Elsevier BV
Date: 11-2009
Turning Indium Oxide into a Superior Electrocatalyst: Deterministic Heteroatoms
Publisher: Springer Science and Business Media LLC
Date: 31-10-2013
DOI: 10.1038/SREP03109
Multi-shelled hollow micro-/nanostructures
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CS00344J
Abstract: Recent advances in multi-shelled hollow micro-/nanostructures were reviewed, and the correlation between their geometric properties and specific performance was highlighted.
Low-temperature processed In2S3 electron transport layer for efficient hybrid perovskite solar cells
Publisher: Elsevier BV
Date: 06-2017
Enhanced Thermochemical H2 Production on Ca-Doped Lanthanum Manganite Perovskites Through Optimizing the Dopant Level and Re-oxidation Temperature
Publisher: Springer Science and Business Media LLC
Date: 12-02-2018
Low-Dimensional Metal-Organic Frameworks with High Activity and Selectivity toward Electrocatalytic Chlorine Evolution Reactions
Publisher: American Chemical Society (ACS)
Date: 13-04-2022
Photoelectrocatalytic Materials for Water Disinfection
Publisher: Springer Berlin Heidelberg
Date: 22-11-2016
Degradation of toluene gas at the surface of ZnO/SnO2 photocatalysts in a baffled bed reactor
Publisher: Springer Science and Business Media LLC
Date: 09-2009
Comparison of Hydrocarbon-Degrading Consortia from Surface and Deep Waters of the Eastern Mediterranean Sea: Characterization and Degradation Potential
Publisher: MDPI AG
Date: 16-04-2021
DOI: 10.3390/EN14082246
Abstract: The ersity and degradation capacity of hydrocarbon-degrading consortia from surface and deep waters of the Eastern Mediterranean Sea were studied in time-series experiments. Microcosms were set up in ONR7a medium at in situ temperatures of 25 °C and 14 °C for the Surface and Deep consortia, respectively, and crude oil as the sole source of carbon. The Deep consortium was additionally investigated at 25 °C to allow the direct comparison of the degradation rates to the Surface consortium. In total, ~50% of the alkanes and ~15% of the polycyclic aromatic hydrocarbons were degraded in all treatments by Day 24. Approximately ~95% of the total biodegradation by the Deep consortium took place within 6 days regardless of temperature, whereas comparable levels of degradation were reached on Day 12 by the Surface consortium. Both consortia were dominated by well-known hydrocarbon-degrading taxa. Temperature played a significant role in shaping the Deep consortia communities with Pseudomonas and Pseudoalteromonas dominating at 25 °C and Alcanivorax at 14 °C. Overall, the Deep consortium showed a higher efficiency for hydrocarbon degradation within the first week following contamination, which is critical in the case of oil spills, and thus merits further investigation for its exploitation in bioremediation technologies tailored to the Eastern Mediterranean Sea.
A photochromic naphthopyran dye activated by the intramolecular hydrogen bond and its photodynamics in the ormosil matrix coating
Publisher: Springer Science and Business Media LLC
Date: 05-10-2015
Facile Formation of Branched Titanate Nanotubes to Grow a Three-Dimensional Nanotubular Network Directly on a Solid Substrate
Publisher: American Chemical Society (ACS)
Date: 29-12-2010
DOI: 10.1021/LA9041869
Abstract: The hydrothermal formation of branched titanate nanotubes that grow a 3D nanotubular network directly onto a titanium substrate is reported. The resultant 3D nanotubular network exhibits a unique all-dimensional uniform porous structure. The inner and outer tubular diameters of branched titanate nanotubes were found to be approximately 6 and 12 nm, respectively. For the majority of the nanotubes, the wall is formed from three layers of titanate with an approximate 7.7 A interlayer space. In terms of in idual nanotubes, these characteristics are quantitatively similar to those of previously reported nonbranched nanotubes. However, in terms of how nanotubes are arranged in the film, the all-dimensional uniform nanotubular network structure obtained here is distinctively different from those of previously reported structures. The 3D nanotubular network structure was formed by the jointing of branched nanotubes. In contrast, the previously reported nanotubes tend to grow vertically on the substrate, and the resultant tubular films are formed by interwoven nonbranched nanotubes. The branched titanate nanotubes can be readily formed on titanium substrates but not in solution suspension forms. A continuous seed formation-oriented crystal growth mechanism was proposed for the branched titanate nanotubular network formation. Such a network structure could be useful for applications such as photocatalysis, membrane separation, field emission, and photovoltaic devices.
The search for efficient electrocatalysts as counter electrode materials for dye-sensitized solar cells: mechanistic study, material screening and experimental validation
Publisher: Springer Science and Business Media LLC
Date: 11-2015
DOI: 10.1038/AM.2015.121
Chemoselective Transfer Hydrogenation of Cinnamaldehyde over Activated Charcoal Supported Pt/Fe3O4 Catalyst
Publisher: AIP Publishing
Date: 08-2017
DOI: 10.1063/1674-0068/30/CJCP1703059
Abstract: A variety of spherical and structured activated charcoal supported Pt/Fe3O4 composites with an average particle size of ∼100 nm have been synthesized by a self-assembly method using the difference of reduction potential between Pt (IV) and Fe (II) precursors as driving force. The formed Fe3O4 nanoparticles (NPs) effectively prevent the aggregation of Pt nanocrystallites and promote the dispersion of Pt NPs on the surface of catalyst, which will be favorable for the exposure of Pt active sites for high-efficient adsorption and contact of substrate and hydrogen donor. The electron-enrichment state of Pt NPs donated by Fe3O4 nanocrystallites is corroborated by XPS measurement, which is responsible for promoting and activating the terminal C=O bond of adsorbed substrate via a vertical configuration. The experimental results show that the activated charcoal supported Pt/Fe3O4 catalyst exhibits 94.8% selectivity towards cinnamyl alcohol by the transfer hydrogenation of cinnamaldehyde with Pt loading of 2.46% under the optimum conditions of 120 °C for 6 h, and 2-propanol as a hydrogen donor. Additionally, the present study demonstrates that a high-efficient and recyclable catalyst can be rapidly separated from the mixture due to its natural magnetism upon the application of magnetic field.
Comparison of photocatalytic degradation kinetic characteristics of different organic compounds at anatase TiO2 nanoporous film electrodes
Publisher: Elsevier BV
Date: 2006
Vapor-phase hydrothermal growth of single crystalline NiS2 nanostructure film on carbon fiber cloth for electrocatalytic oxidation of alcohols to ketones and simultaneous H2 evolution
Publisher: Springer Science and Business Media LLC
Date: 04-08-2018
Ruthenium Oxide Clusters Immobilized in Cationic Vacancies of 2D Titanium Oxide for Chlorine Evolution Reaction
Publisher: Wiley
Date: 12-10-2023
Co3O4 Hexagonal Platelets with Controllable Facets Enabling Highly Efficient Visible‐Light Photocatalytic Reduction of CO2
Publisher: Wiley
Date: 12-05-2016
Preparation and characterisation of a poly(acrylamidoglycolic acid-co-acrylamide) hydrogel for selective binding of Cu2+ and application to diffusive gradients in thin films measurements
Publisher: Elsevier BV
Date: 08-2002
Photoelectrochemical determination of chemical oxygen demand based on an exhaustive degradation model in a thin-layer cell
Publisher: Elsevier BV
Date: 06-2004
Quintuple-Shelled SnO2 Hollow Microspheres with Superior Light Scattering for High-Performance Dye-Sensitized Solar Cells
Publisher: Wiley
Date: 22-10-2014
Abstract: Quintuple-shelled SnO2 hollow microspheres are prepared by a hard-template method. DSSCs constructed with SnO2 multi-shell photoanodes show a record photoconversion efficiency of 7.18% due to enhanced light scattering. SnO2 hollow microspheres that are utilized as a scattering layer on top of P25 films increase the DSSC photoconversion efficiency from 7.29% to 9.53%.
Edge‐hosted Atomic Co−N4 Sites on Hierarchical Porous Carbon for Highly Selective Two‐electron Oxygen Reduction Reaction
Publisher: Wiley
Date: 17-11-2022
Abstract: Not only high efficiency but also high selectivity of the electrocatalysts is crucial for high‐performance, low‐cost, and sustainable energy storage applications. Herein, we systematically investigate the edge effect of carbon‐supported single‐atom catalysts (SACs) on oxygen reduction reaction (ORR) pathways (two‐electron (2 e − ) or four‐electron (4 e − )) and conclude that the 2 e − ‐ORR proceeding over the edge‐hosted atomic Co−N 4 sites is more favorable than the basal‐plane‐hosted ones. As such, we have successfully synthesized and tuned Co‐SACs with different edge‐to‐bulk ratios. The as‐prepared edge‐rich Co−N/HPC catalyst exhibits excellent 2 e − ‐ORR performance with a remarkable selectivity of ≈95 % in a wide potential range. Furthermore, we also find that oxygen functional groups could saturate the graphitic carbon edges under the ORR operation and further promote electrocatalytic performance. These findings on the structure–property relationship in SACs offer a promising direction for large‐scale and low‐cost electrochemical H 2 O 2 production via the 2 e − ‐ORR.
Ball Milling-Induced Plate-like Sub-microstructured Iron for Enhancing Degradation of DDT in a Real Soil Environment
Publisher: American Chemical Society (ACS)
Date: 27-06-2018
Gas-Permeable Membrane-Based Conductivity Probe Capable of In Situ Real-Time Monitoring of Ammonia in Aquatic Environments
Publisher: American Chemical Society (ACS)
Date: 08-11-2017
Abstract: Aquatic ammonia has toxic effects on aquatic life. This work reports a gas-permeable membrane-based conductivity probe (GPMCP) developed for real-time monitoring of ammonia in aquatic environments. The GPMCP innovatively combines a gas-permeable membrane with a boric acid receiving phase to selectively extract ammonia from s les and form ammonium at the inner membrane interface. The rate of the receiving phase conductivity increase is directly proportional to the instantaneous ammonia concentration in the s le, which can be rapidly and sensitively determined by the embedded conductivity detector. A precalibration strategy was developed to eliminate the need for an ongoing calibration. The analytical principle and GPMCP performance were systematically validated. The laboratory results showed that ammonia concentrations ranging from 2 to 50 000 μg L
In situ growth of MOFs on Ni(OH)2 for efficient electrocatalytic oxidation of 5-hydroxymethylfurfural
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1CC04680B
Abstract: A MOF modification approach is proposed to effectively suppress the oxygen evolution reaction for the electrocatalytic oxidation of 5-hydroxymethylfurfural to 2,5-furandicarboxylic acid with 100% yield and faradaic efficiency.
NiFe-Layered Double Hydroxide Nanosheet Arrays Supported on Carbon Cloth for Highly Sensitive Detection of Nitrite
Publisher: American Chemical Society (ACS)
Date: 09-02-2018
Abstract: Excessive uptake of nitrite has been proven to be detrimental to the ecological system and human health. Hence, there is a rising requirement for constructing effective electrochemical sensors to precisely monitor the level of nitrite. In this work, NiFe-layered double hydroxide nanosheet arrays (NiFe-LDH NSAs) have been successfully fabricated on a carbon cloth (CC) substrate via a facile one-pot hydrothermal route. By integrating the collective merits of macroporous CC and NiFe-LDH NSAs such as superior electrical conductivity, striking synergistic effect between the dual active components, enlarged electrochemically active surface area, unique three-dimensional hierarchical porous network characteristics, and fast charge transport and ion diffusion, the proposed NiFe-LDH NSAs/CC architecture can be served as a self-supporting sensor toward nitrite detection. As a consequence, the resulting NiFe-LDH NSAs/CC electrode demonstrates superior nitrite sensing characteristics, accompanied by broad linear range (5-1000 μM), quick response rate (ca. 3 s), ultralow detection limit (0.02 μM), and high sensitivity (803.6 μA·mM
Facile fabrication of composition-tunable Fe/Mg bimetal-organic frameworks for exceptional arsenate removal
Publisher: Elsevier BV
Date: 02-2019
Iron Vacancies Induced Bifunctionality in Ultrathin Feroxyhyte Nanosheets for Overall Water Splitting
Publisher: Wiley
Date: 18-07-2018
Abstract: Exploring of new catalyst activation principle holds a key to unlock catalytic powers of cheap and earth-abundant materials for large-scale applications. In this regard, the vacancy defects have been proven to be effective to initiate catalytic active sites and endow high electrocatalytic activities. However, such electrocatalytically active defects reported to date have been mostly formed by anion vacancies. Herein, it is demonstrated for the first time that iron cation vacancies induce superb water splitting bifunctionality in alkaline media. A simple wet-chemistry method is developed to grow ultrathin feroxyhyte (δ-FeOOH) nanosheets with rich Fe vacancies on Ni foam substrate. The theoretical and experimental results confirm that, in contrast to anion vacancies, the formation of rich second neighboring Fe to Fe vacancies in δ-FeOOH nanosheets can create catalytic active centers for both hydrogen and oxygen evolution reactions. The atomic level insight into the new catalyst activation principle based on metal vacancies is adaptable for developing other transition metal electrocatalysts, including Fe-based ones.
Highly dispersed Co and Ni nanoparticles encapsulated in N-doped carbon nanotubes as efficient catalysts for the reduction of unsaturated oxygen compounds in aqueous phase
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CY01488D
Abstract: N-Doped carbon nanotube-encapsulated Co and Ni nanoparticles exhibit excellent catalytic performance for the selective reduction of unsaturated oxygen compounds in aqueous phase.
Ca2+ and Ga3+ doped LaMnO3 perovskite as a highly efficient and stable catalyst for two-step thermochemical water splitting
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6SE00097E
Abstract: High performance and stable catalysts for two-step thermochemical water splitting are key to synthesising direct fuels in the form of H 2 or liquid hydrocarbon fuels by the Fischer–Tropsch process.
Development of a genetic microelectrode array biosensing system
Publisher: Elsevier BV
Date: 09-2000
Development of a Direct Photoelectrochemical Method for Determination of Chemical Oxygen Demand
Publisher: American Chemical Society (ACS)
Date: 20-11-2003
DOI: 10.1021/AC0302298
Activation of persulfates by natural magnetic pyrrhotite for water disinfection: Efficiency, mechanisms, and stability
Publisher: Elsevier BV
Date: 04-2017
DOI: 10.1016/J.WATRES.2017.01.052
Abstract: This study introduces natural occurring magnetic pyrrhotite (NP) as an environmentally friendly, easy available, and cost-effective alternative catalyst to activate persulfate (PS) of controlling microbial water contaminants. The E. coli K-12 inactivation kinetics observed in batch experiments was well described with first-order reaction. The optimum inactivation rate (k = 0.47 log/min) attained at a NP dose of 1 g/L and a PS dose of 1 mM, corresponding to total inactivation of 7 log
Highly efficient electrocatalytic oxidation of urea on a Mn-incorporated Ni(OH)2/carbon fiber cloth for energy-saving rechargeable Zn–air batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC04368F
Abstract: The introduction of Mn can effectively regulate the electronic structure of Ni hydroxides on CFC, exhibiting superior electrocatalytic oxidation activity toward urea and potential applications in energy-saving rechargeable Zn–air batteries.
Precisely controlled heterogeneous nucleation sites for TiO2 crystal growth
Publisher: Royal Society of Chemistry (RSC)
Date: 30-06-2014
DOI: 10.1039/C4CE00537F
Kinetic study of photocatalytic oxidation of adsorbed carboxylic acids at TiO2 porous films by photoelectrolysis
Publisher: Elsevier BV
Date: 04-2004
The role of catalase and H2O2 in photocatalytic inactivation of Escherichia coli: Genetic and biochemical approaches
Publisher: Elsevier BV
Date: 05-2016
Fabrication of hierarchical iron-containing MnO2 hollow microspheres assembled by thickness-tunable nanosheets for efficient phosphate removal
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA05386F
Abstract: Hierarchical flower-like iron containing γ-MnO 2 hollow microspheres assembled by thickness-tunable nanosheets have been successfully fabricated, demonstrating the morphology-dependent phosphate removal performance.
Transfer-hydrogenation of furfural and levulinic acid over supported copper catalyst
Publisher: Elsevier BV
Date: 11-2018
Ambient Electrosynthesis of Ammonia on a Biomass-Derived Nitrogen-Doped Porous Carbon Electrocatalyst: Contribution of Pyridinic Nitrogen
Publisher: American Chemical Society (ACS)
Date: 02-01-2019
Flexible and stretchable inorganic electronics: Conductive materials, fabrication strategy, and applicable devices
Publisher: Elsevier
Date: 2020
In situ photoelectrocatalytic generation of bactericide for instant inactivation and rapid decomposition of Gram-negative bacteria
Publisher: Elsevier BV
Date: 03-01-2011
Longitudinal Trajectories of Depression Symptoms in Adolescence: Psychosocial Risk Factors and Outcomes
Publisher: Springer Science and Business Media LLC
Date: 12-09-2017
DOI: 10.1007/S10578-016-0682-Z
Abstract: Variations in symptom trajectories within a population may represent distinct groups with different etiologies and outcomes. This study aimed to identify subgroups of depression symptom trajectories in a s le of adolescents, and to describe psychosocial attributes of the different groups. In a longitudinal study, 243 adolescents (121 males and 122 females), were assessed using a battery of measures of temperament, psychopathology, and psychological and behavioral functioning. Four phases of data collection over 7 years spanned average ages of the participants from 12 to 18 years old. Depressive symptoms from each phase were used to model latent class growth trajectories. A 4-group solution was selected as the best-fitting model: (1) ongoing stable low levels of depression (2) very high depressive symptoms initially, but a steep decrease in symptoms over time (3) moderately high depressive symptoms initially, but symptoms decreased over time and (4) initially low levels of symptoms that increased over time. Trajectory group membership was associated with a range of psychosocial variables including temperament, childhood maltreatment, and young adult quality of life. Characterising these subgroups allows for a better understanding of how the interaction of risk factors increases the likelihood of depression and other poor outcomes, and highlights the importance of early interventions to prevent and treat adolescent depression.
Targeted synthesis of a porous aromatic framework with a high adsorption capacity for organic molecules
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1JM11998B
β-FeOOH Nanorods/Carbon Foam-Based Hierarchically Porous Monolith for Highly Effective Arsenic Removal
Publisher: American Chemical Society (ACS)
Date: 06-04-2017
Abstract: Arsenic pollution in waters has become a worldwide issue, constituting a severe hazard to whole ecosystems and public health worldwide. Accordingly, it is highly desirable to design high-performance adsorbents for arsenic decontamination. Herein, a feasible strategy is developed for in situ growth of β-FeOOH nanorods (NRs) on a three-dimensional (3D) carbon foam (CF) skeleton via a simple calcination process and subsequent hydrothermal treatment. The as-fabricated 3D β-FeOOH NRs/CF monolith can be innovatively utilized for arsenic remediation from contaminated aqueous systems, accompanied by remarkably high uptake capacity of 103.4 mg/g for arsenite and 172.9 mg/g for arsenate. The superior arsenic uptake performance can be ascribed to abundant active sites and hydroxyl functional groups available as well as efficient mass transfer associated with interconnected hierarchical porous networks. In addition, the as-obtained material exhibits exceptional sorption selectivity toward arsenic over other coexisting anions at high levels, which can be ascribed to strong affinity between active sites and arsenic. More importantly, the free-standing 3D porous monolith not only makes it easy for separation and collection after treatment but also efficiently prevents the undesirable potential release of nanoparticles into aquatic environments while maintaining the outstanding properties of nanometer-scale building blocks. Furthermore, the monolith absorbent is able to be effectively regenerated and reused for five cycles with negligible decrease in arsenic removal. In view of extremely high adsorption capacities, preferable sorption selectivity, satisfactory recyclability, as well as facile separation nature, the obtained 3D β-FeOOH NRs/CF monolith holds a great potential for arsenic decontamination in practical applications.
Vertically aligned nanorod-like rutile TiO2 single crystal nanowire bundles with superior electron transport and photoelectrocatalytic properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM15546J
Path Planning for Multiple Targets Interception by the Swarm of UAVs based on Swarm Intelligence Algorithms: A Review
Publisher: Informa UK Limited
Date: 11-03-2021
A new insight into regulating high energy facets of rutile TiO2
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA00188A
Widespread white matter microstructural differences in schizophrenia across 4322 individuals: results from the ENIGMA Schizophrenia DTI Working Group
Publisher: Springer Science and Business Media LLC
Date: 17-10-2017
DOI: 10.1038/MP.2017.170
Highly dispersed nickel anchored on a N-doped carbon molecular sieve derived from metal–organic frameworks for efficient hydrodeoxygenation in the aqueous phase
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0CC02620D
Abstract: A HD-Ni/N-CMS catalyst exhibited excellent catalytic performance in aqueous-phase hydrodeoxygenation of lignin-derived vanillin through a synergistic effect of zeolite-type N-CMS and the unsaturated Ni–N coordination site.
Synthesis and Characterization of Novel Plasmonic Ag/AgX-CNTs (X = Cl, Br, I) Nanocomposite Photocatalysts and Synergetic Degradation of Organic Pollutant under Visible Light
Publisher: American Chemical Society (ACS)
Date: 22-07-2013
DOI: 10.1021/AM401459C
Abstract: A series of novel well-defined Ag/AgX (X = Cl, Br, I) loaded carbon nanotubes (CNTs) composite photocatalysts (Ag/AgX-CNTs) were fabricated for the first time via a facile ultrasonic assistant deposition-precipitation method at the room temperature (25 ± 1 °C). X-ray diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption analysis, scanning electron microscopy, and ultraviolet-visible light absorption spectra analysis were used to characterize the structure, morphology, and optical properties of the as-prepared photocatalysts. Results confirmed the existence of the direct interfacial contact between Ag/AgX nanoparticles and CNTs, and Ag/AgX-CNTs nanocomposites exhibit superior absorbance in the visible light (VL) region owing to the surface plasmon resonance (SPR) of Ag nanoparticles. The fabricated composite photocatalysts were employed to remove 2,4,6-tribromophenol (TBP) in aqueous phase. A remarkably enhanced VL photocatalytic degradation efficiency of Ag/AgX-CNTs nanocomposites was observed when compared to that of pure AgX or CNTs. The photocatalytic activity enhancement of Ag/AgX-CNTs was due to the effective electron transfer from photoexcited AgX and plasmon-excited Ag(0) nanoparticles to CNTs. This can effectively decrease the recombination of electron-hole pairs, lead to a prolonged lifetime of the photoholes that promotes the degradation efficiency.
High-Flux Ceramic Membranes with a Nanomesh of Metal Oxide Nanofibers
Publisher: American Chemical Society (ACS)
Date: 04-2008
DOI: 10.1021/JP709837R
Abstract: Traditional ceramic separation membranes, which are fabricated by applying colloidal suspensions of metal hydroxides to porous supports, tend to suffer from pinholes and cracks that seriously affect their quality. Other intrinsic problems for these membranes include dramatic losses of flux when the pore sizes are reduced to enhance selectivity and dead-end pores that make no contribution to filtration. In this work, we propose a new strategy for addressing these problems by constructing a hierarchically structured separation layer on a porous substrate using large titanate nanofibers and smaller boehmite nanofibers. The nanofibers are able to ide large voids into smaller ones without forming dead-end pores and with the minimum reduction of the total void volume. The separation layer of nanofibers has a porosity of over 70% of its volume, whereas the separation layer in conventional ceramic membranes has a porosity below 36% and inevitably includes dead-end pores that make no contribution to the flux. This radical change in membrane texture greatly enhances membrane performance. The resulting membranes were able to filter out 95.3% of 60-nm particles from a 0.01 wt % latex while maintaining a relatively high flux of between 800 and 1000 L/m2.h, under a low driving pressure (20 kPa). Such flow rates are orders of magnitude greater than those of conventional membranes with equal selectivity. Moreover, the flux was stable at approximately 800 L/m2.h with a selectivity of more than 95%, even after six repeated runs of filtration and calcination. Use of different supports, either porous glass or porous alumina, had no substantial effect on the performance of the membranes thus, it is possible to construct the membranes from a variety of supports without compromising functionality. The Darcy equation satisfactorily describes the correlation between the filtration flux and the structural parameters of the new membranes. The assembly of nanofiber meshes to combine high flux with excellent selectivity is an exciting new direction in membrane fabrication.
Potassium Ion Assisted Regeneration of Active Cyano Groups in Carbon Nitride Nanoribbons: Visible Light Driven Photocatalytic Nitrogen Reduction
Publisher: Wiley
Date: 10-2019
Abstract: As a metal‐free nitrogen reduction reaction (NRR) photocatalyst, g‐C 3 N 4 is available from a scalable synthesis at low cost. Importantly, it can be readily functionalized to enhance photocatalytic activities. However, the use of g‐C 3 N 4 ‐based photocatalysts for the NRR has been questioned because of the elusive mechanism and the involvement of N defects. This work reports the synthesis of a g‐C 3 N 4 photocatalyst modified with cyano groups and intercalated K + ( m CNN), possessing extended visible‐light harvesting capacity and superior photocatalytic NRR activity (NH 3 yield: 3.42 mmol g −1 h −1 ). Experimental and theoretical studies suggest that the ‐C≡N in m CNN can be regenerated through a pathway analogous to Mars van Krevelen process with the aid of the intercalated K + . The results confirm that the regeneration of the cyano group not only enhances photocatalytic activity and sustains the catalytic cycle, but also stabilizes the photocatalyst.
Estimation of chemical oxygen demand by ultraviolet spectroscopic profiling and artificial neural networks
Publisher: Springer Science and Business Media LLC
Date: 30-11-2005
Rutile TiO2. Microspheres with Exposed Nano-Acicular Single Crystals for Dye-Sensitized Solar Cells
Publisher: Springer Science and Business Media LLC
Date: 23-05-2011
Manipulating solar absorption and electron transport properties of rutile TiO2 photocatalysts via highly n-type F-doping
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3TA13917D
Chiral quantum optics
Publisher: Springer Science and Business Media LLC
Date: 2017
DOI: 10.1038/NATURE21037
Abstract: Advanced photonic nanostructures are currently revolutionizing the optics and photonics that underpin applications ranging from light technology to quantum-information processing. The strong light confinement in these structures can lock the local polarization of the light to its propagation direction, leading to propagation-direction-dependent emission, scattering and absorption of photons by quantum emitters. The possibility of such a propagation-direction-dependent, or chiral, light-matter interaction is not accounted for in standard quantum optics and its recent discovery brought about the research field of chiral quantum optics. The latter offers fundamentally new functionalities and applications: it enables the assembly of non-reciprocal single-photon devices that can be operated in a quantum superposition of two or more of their operational states and the realization of deterministic spin-photon interfaces. Moreover, engineered directional photonic reservoirs could lead to the development of complex quantum networks that, for ex le, could simulate novel classes of quantum many-body systems.
Scalable Production of Graphene Oxide Using a 3D-Printed Packed-Bed Electrochemical Reactor with a Boron-Doped Diamond Electrode
Publisher: American Chemical Society (ACS)
Date: 23-01-2019
Altered structural connectivity in ADHD: a network based analysis
Publisher: Springer Science and Business Media LLC
Date: 11-06-2017
The relationship of developmental changes in white matter to the onset of psychosis
Publisher: Bentham Science Publishers Ltd.
Date: 02-2012
Accurately identifying nucleic-acid-binding sites through geometric graph learning on language model predicted structures
Publisher: Oxford University Press (OUP)
Date: 22-09-2023
DOI: 10.1093/BIB/BBAD360
Tunable synthesis of imines and secondary-amines from tandem hydrogenation-coupling of aromatic nitro and aldehyde over NiCo5 bi-metallic catalyst
Publisher: Elsevier BV
Date: 2021
Renewable energy conversion and storage
Publisher: Wiley
Date: 12-2017
A New Vapor-Phase Hydrothermal Method to Concurrently Grow ZnO Nanotube and Nanorod Array Films on Different Sides of a Zinc Foil Substrate
Publisher: Wiley
Date: 19-03-2012
Abnormal white matter microstructure in schizophrenia: a voxelwise analysis of axial and radial diffusivity.
Publisher: Elsevier BV
Date: 04-2008
DOI: 10.1016/J.SCHRES.2007.12.489
Abstract: Diffusion Tensor Imaging (DTI) investigations in schizophrenia have provided evidence of impairment in white matter as indicated by reduced fractional anisotropy (FA). However, the neuropathological implications of these findings remain unclear. In the current study, we conducted a voxelwise analysis of the constituent parameters of FA, Axial (lambda(||)) and Radial Diffusivity (lambda( upper left and right quadrants)), in 14 male participants with schizophrenia and 14 age, gender, education, and premorbid intelligence matched healthy controls. Significantly reduced FA and higher Radial Diffusivity were concurrently observed in several major white matter tracts in the schizophrenia group. This finding suggests that the loss of white matter integrity in schizophrenia is the result of demyelination and/or changes to the axonal cytoskeleton rather than gross axonal damage.
Atomically-dispersed Mn-(N-C2)2(O-C2)2 sites on carbon for efficient oxygen reduction reaction
Publisher: Elsevier BV
Date: 08-2022
Interaction between bacterial cell membranes and nano-TiO2 revealed by two-dimensional FTIR correlation spectroscopy using bacterial ghost as a model cell envelope
Publisher: Elsevier BV
Date: 07-2017
DOI: 10.1016/J.WATRES.2017.04.023
Abstract: The interaction between microorganisms and nanoparticles is a crucial step towards understanding the subsequent biological effect. In this study, the interaction between TiO
Fluorescence Determination of Nitrite in Water Using Prawn-Shell Derived Nitrogen-Doped Carbon Nanodots as Fluorophores
Publisher: American Chemical Society (ACS)
Date: 02-06-2016
In situ photoelectrochemical measurement of phthalic acid on titania
Publisher: Elsevier BV
Date: 12-2009
Cobalt-doped Mn3O4 nanocrystals embedded in graphene nanosheets as a high-performance bifunctional oxygen electrocatalyst for rechargeable Zn–Air batteries
Publisher: Elsevier BV
Date: 10-2020
Dual Roles of Capsular Extracellular Polymeric Substances in Photocatalytic Inactivation of Escherichia coli: Comparison of E. coli BW25113 and Isogenic Mutants
Publisher: American Society for Microbiology
Date: 08-2015
DOI: 10.1128/AEM.00775-15
Abstract: The dual roles of capsular extracellular polymeric substances (EPS) in the photocatalytic inactivation of bacteria were demonstrated in a TiO 2 -UVA system, by comparing wild-type Escherichia coli strain BW25113 and isogenic mutants with upregulated and downregulated production of capsular EPS. In a partition system in which direct contact between bacterial cells and TiO 2 particles was inhibited, an increase in the amount of EPS was associated with increased bacterial resistance to photocatalytic inactivation. In contrast, when bacterial cells were in direct contact with TiO 2 particles, an increase in the amount of capsular EPS decreased cell viability during photocatalytic treatment. Taken together, these results suggest that although capsular EPS can protect bacterial cells by consuming photogenerated reactive species, it also facilitates photocatalytic inactivation of bacteria by promoting the adhesion of TiO 2 particles to the cell surface. Fluorescence microscopy and scanning electron microscopy analyses further confirmed that high capsular EPS density led to more TiO 2 particles attaching to cells and forming bacterium-TiO 2 aggregates. Calculations of interaction energy, represented by extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) potential, suggested that the presence of capsular EPS enhances the attachment of TiO 2 particles to bacterial cells via acid-base interactions. Consideration of these mechanisms is critical for understanding bacterium-nanoparticle interactions and the photocatalytic inactivation of bacteria.
Photoelectrocatalytic activity of mesoporous TiO2 thin film electrodes
Publisher: Elsevier BV
Date: 02-2009
A novel 3D porous cadmium(II) MOF based on conjugated ligand with potential application for sensing small linear conjugated molecule
Publisher: Elsevier BV
Date: 11-2012
Study on the formation of the Prussian blue films on the polypyrrole surface as a potential mediator system for biosensing applications
Publisher: Elsevier BV
Date: 11-2002
A comparative study between photocatalytic and photoelectrocatalytic properties of Pt deposited TiO2 thin films for glucose degradation
Publisher: Elsevier BV
Date: 04-2010
Principal component analysis and response surface methodology: optimization for H-2 evolution from water catalyzed adopting VeBi under visible light
Publisher: Elsevier BV
Date: 09-2022
One dimensional CuInS2-ZnS heterostructured nanomaterials as low-cost and high-performance counter electrodes of dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3EE24176A
Integration of Fe2O3-based photoanode and atomically dispersed cobalt cathode for efficient photoelectrochemical NH3 synthesis
Publisher: Elsevier BV
Date: 02-2020
Thermal Effects Control the Structure of the Cu(100)-C(2 × 2)N Surface
Publisher: American Scientific Publishers
Date: 03-2012
Identifying Individuals at High Risk of Psychosis: Predictive Utility of Support Vector Machine using Structural and Functional MRI Data
Publisher: Frontiers Media SA
Date: 08-04-2016
Nanocrystal Cu2O-loaded TiO2 nanotube array films as high-performance visible-light bactericidal photocatalyst
Publisher: Springer Science and Business Media LLC
Date: 28-06-2012
DOI: 10.1007/S00253-012-4233-7
Abstract: In this work, we report the use of a non-toxic nanocrystal Cu(2)O-loaded TiO(2) nanotube array (Cu(2)O/TNTs) film as high-performance visible-light bactericidal photocatalyst. The s les were characterized by field-emission scanning electron microscopy, X-ray photoelectron spectroscopy, and ultraviolet-visible diffusion reflection spectroscopy. This Cu(2)O/TNTs film photocatalyst is capable of complete inactivation of Escherichia coli in 5 × 10(7) colony-forming units/mL within a record short disinfection time of 20 min under visible-light irradiation. The average bactericidal percentage of the Cu(2)O/TNTs for E. coli under visible-light irradiation are 20 times and 6.6 times higher than those of TNTs under the same conditions and Cu(2)O/TNTs without light, respectively. This superior bactericidal performance is mainly attributed to the high ability to produce OH radicals by both photogenerated electron and hole of the prepared photocatalyst under visible light. The Cu(2)O/TNTs film photocatalyst makes it applicable to broad fields including drinking water disinfection.
Software Pipeline for Midsagittal Corpus Callosum Thickness Profile Processing: Automated Segmentation, Manual Editor, Thickness Profile Generator, Group-Wise Statistical Comparison and Results Display
Publisher: Springer Science and Business Media LLC
Date: 27-06-2014
DOI: 10.1007/S12021-014-9236-3
Abstract: This paper presents a fully automated pipeline for thickness profile evaluation and analysis of the human corpus callosum (CC) in 3D structural T 1-weighted magnetic resonance images. The pipeline performs the following sequence of steps: midsagittal plane extraction, CC segmentation algorithm, quality control tool, thickness profile generation, statistical analysis and results figure generator. The CC segmentation algorithm is a novel technique that is based on a template-based initialisation with refinement using mathematical morphology operations. The algorithm is demonstrated to have high segmentation accuracy when compared to manual segmentations on two large, publicly available datasets. Additionally, the resultant thickness profiles generated from the automated segmentations are shown to be highly correlated to those generated from the ground truth segmentations. The manual editing tool provides a user-friendly environment for correction of errors and quality control. Statistical analysis and a novel figure generator are provided to facilitate group-wise morphological analysis of the CC.
Visible-light-driven photocatalytic inactivation of E. coli by Ag/AgX-CNTs (X=Cl, Br, I) plasmonic photocatalysts: Bacterial performance and deactivation mechanism
Publisher: Elsevier BV
Date: 10-2014
Different brain networks underlying intelligence in autism spectrum disorders
Publisher: Wiley
Date: 17-04-2018
DOI: 10.1002/HBM.24074
Active sites on hydrogen evolution photocatalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA13167J
Effects of principal stress rotation on wave-induced soil response in a poro-elastoplastic sandy seabed
Publisher: Springer Science and Business Media LLC
Date: 27-04-2019
A dual-phase biosensing system for the determination of phenols in both aqueous and organic media
Publisher: Elsevier BV
Date: 08-2001
Dynamics and stability of an optically levitated mirror
Publisher: American Physical Society (APS)
Date: 27-05-2020
Ceria Foam with Atomically Thin Single‐Crystal Walls
Publisher: Wiley
Date: 28-02-2012
A Vapor Phase Hydrothermal Modification Method Converting a Honeycomb Structured Hybrid Film into Photoactive TiO2 Film
Publisher: American Chemical Society (ACS)
Date: 04-06-2009
DOI: 10.1021/LA901338J
Abstract: Transforming an organic/inorganic hybrid material into a pure inorganic material without losing its original structure is of interest for a range of applications. In this work, a simple and effective vapor phase hydrothermal method was developed to transform a 3D honeycomb structured PS/TTIP hybrid film into a photoactive TiO2 film without dismantling the originally templated 3D structure. The method utilizes the vapor phase hydrothermal process to create titania network/clusters with sufficient mechanical strength via the formation of Ti-oxo bridges. The organic components of the s le can be removed by means of pyrolysis while perfectly maintaining the original 3D honeycomb structure. The resultant film can be directly used for photocatalysis applications and could be further modified for other applications. In principle, this method can be used to preserve 3D structures of other organic/inorganic hybrid films during their conversion to pure inorganic films via a pyrolysis process, if mechanically strong networks can be formed as a result of hydrolysis reactions. The ability to preserve the preferred 3D structure during the subsequent conversion processes enables realization of the full benefit of unique architectures created by a templating method.
Porous carbon nanosheets functionalized with Fe3O4 nanoparticles for capacitive removal of heavy metal ions from water
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EW00472F
Abstract: Porous graphitic carbon nanosheets functionalized by ultrafine Fe 3 O 4 NPs and amino-functionalized activated carbon were developed to construct a hybrids capacitive deionization for efficient removal of multiple heavy metal ions in water.
Induction of Psychosis byΔ9-Tetrahydrocannabinol Reflects Modulation of Prefrontal and Striatal Function During Attentional Salience Processing
Publisher: American Medical Association (AMA)
Date: 2012
DOI: 10.1001/ARCHGENPSYCHIATRY.2011.161
Abstract: The aberrant processing of salience is thought to be a fundamental factor underlying psychosis. Cannabis can induce acute psychotic symptoms, and its chronic use may increase the risk of schizophrenia. We investigated whether its psychotic effects are mediated through an influence on attentional salience processing. To examine the effects of Δ9-tetrahydrocannabinol (Δ9-THC) and cannabidiol (CBD) on regional brain function during salience processing. Volunteers were studied using event-related functional magnetic resonance imaging on 3 occasions after administration of Δ9-THC, CBD, or placebo while performing a visual oddball detection paradigm that involved allocation of attention to infrequent (oddball) stimuli within a string of frequent (standard) stimuli. University center. Fifteen healthy men with minimal previous cannabis use. Symptom ratings, task performance, and regional brain activation. During the processing of oddball stimuli, relative to placebo, Δ9-THC attenuated activation in the right caudate but augmented it in the right prefrontal cortex. Δ9-Tetrahydrocannabinol also reduced the response latency to standard relative to oddball stimuli. The effect of Δ9-THC in the right caudate was negatively correlated with the severity of the psychotic symptoms it induced and its effect on response latency. The effects of CBD on task-related activation were in the opposite direction of those of Δ9-THC relative to placebo, CBD augmented left caudate and hippoc al activation but attenuated right prefrontal activation. Δ9-Tetrahydrocannabinol and CBD differentially modulate prefrontal, striatal, and hippoc al function during attentional salience processing. These effects may contribute to the effects of cannabis on psychotic symptoms and on the risk of psychotic disorders.
Synthesis, Characterisation and Transport Properties of Layered Conducting Electroactive Polypyrrole Membranes
Publisher: Elsevier BV
Date: 09-1998
Rutile TiO2 films with 100% exposed pyramid-shaped (111) surface: photoelectron transport properties under UV and visible light irradiation
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C2TA00819J
Fabrication of highly ordered TiO2 nanorod/nanotube adjacent arrays for photoelectrochemical applications
Publisher: American Chemical Society (ACS)
Date: 12-04-2010
DOI: 10.1021/LA1005314
Abstract: This work reports a facile approach to fabricate a perpendicularly aligned and highly ordered TiO(2) nanorod/nanotube (NR/NT) adjacent film by directly anodizing a modified titanium foil. The titanium foil substrate was modified with a layer of crystalline TiO(2) film via a hydrothermal process in 0.05 M (NH(4))(2)S(2)O(8). The resultant NR/NT architecture consists of a highly ordered nanorod top layer that directly adjoins to a highly ordered nanotube array bottom layer. The thickness of the top nanorod layer was approximately 90 nm with average nanorod diameter of 22 nm after 20 min of anodization. The thickness of the bottom nanotube array layer was found to be ca. 250 nm after 20 min of anodization, having an average outer and inner tubular diameters of 120 and 80 nm, respectively. A broad implication of the method is that a simple modification to the substrate surface can lead to new forms of nanostructures. For as-anodized NR/NT s les, XRD analysis reveals that the nanorods are of anatase TiO(2) crystalline form while the nanotubes are amorphous. Anatase TiO(2) crystalline form of NR/NT film with high crystallinity can be obtained by thermally treating the as-anodized s le at 450 degrees C for 2 h in air. The resultant NR/NT film was used as a photoanode for photoactivity evaluation. Comparing with a nanotube array photoanode prepared by direct anodization of unmodified titanium foil, the NR/NT photoanode exhibits a unique feature of selective photocatalytic oxidation toward organics, which makes it very attractive to photocatalytic degradation of organic pollutants, sensing, and other applications.
Preface to Special Issue on Nanoscience and Catalysis
Publisher: Elsevier BV
Date: 06-2017
Unidirectional suppression of hydrogen oxidation on oxidized platinum clusters
Publisher: Springer Science and Business Media LLC
Date: 17-09-2013
DOI: 10.1038/NCOMMS3500
Abstract: Solar-driven water splitting to produce hydrogen may be an ideal solution for global energy and environment issues. Among the various photocatalytic systems, platinum has been widely used to co-catalyse the reduction of protons in water for hydrogen evolution. However, the undesirable hydrogen oxidation reaction can also be readily catalysed by metallic platinum, which limits the solar energy conversion efficiency in artificial photosynthesis. Here we report that the unidirectional suppression of hydrogen oxidation in photocatalytic water splitting can be fulfilled by controlling the valence state of platinum this platinum-based cocatalyst in a higher oxidation state can act as an efficient hydrogen evolution site while suppressing the undesirable hydrogen back-oxidation. The findings in this work may pave the way for developing other high-efficientcy platinum-based catalysts for photocatalysis, photoelectrochemistry, fuel cells and water-gas shift reactions.
Recent applications of TiO2 nanomaterials in chemical sensing in aqueous media
Publisher: Elsevier BV
Date: 12-2011
Comparative Studies of Photocatalytic and Photoelectrocatalytic Inactivation of E. coli in Presence of Halides
Publisher: Elsevier BV
Date: 08-2013
Rational Design of N‐Doped Carbon‐Coated Cobalt Nanoparticles for Highly Efficient and Durable Photothermal CO2 Conversion
Publisher: Wiley
Date: 19-09-2023
Abstract: The photothermal CO 2 hydrogenation to high value‐added chemicals and fuels is an appealing approach to alleviate the energy and environmental concerns. However, it still relies on the development of earth‐abundant, efficient and durable catalysts. Here, we report the design of N‐doped carbon coated Co nanoparticles (NPs) as a photothermal catalyst, synthesized through a two‐step pyrolysis of Co‐based ZIF‐67 precursor. Consequently, the catalyst exhibits remarkable activity and stability for photothermal CO 2 hydrogenation to CO with a 0.75 mol g cat −1 h −1 CO production rate under the full spectrum of light illumination. The high activity and durability of this Co NPs are mainly attributed to the synergy of the attuned size of Co NPs, the thickness of carbon layers and the N doping species. Impressively, the experimental characterizations and theoretical simulations show that such a simple N‐doped carbon coating strategy can effectively facilitate the desorption of generated CO and activation of reactants due to the strong photothermal effect. This work provides a simple and efficient route for the preparation of highly active and durable nonprecious metal catalysts for promising photothermal catalytic reactions. This article is protected by copyright. All rights reserved
Low cost and environmentally benign crack-blocking structures for long life and high power Si electrodes in lithium ion batteries
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4TA05817H
Abstract: A graphical illustration of the gum arabic (GA) and polyacrylic acid (PAA) composite binder.
Photoelectrochemical quantification of electron transport resistance of TiO2 photoanodes for dye-sensitized solar cells
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/B924596K
Abstract: A simple photoelectrochemical method is developed to measure the intrinsic electron transport resistance (R(0)) of TiO(2) photoanodes. R(0) is considered as the sum of electron transport resistance at the TiO(2)/FTO interface and among TiO(2) nanoparticulates during electron transport process, which is independent of the manner of electron injection, its physical and chemical environments. Because TiO(2) photoanodes are the common electron transport pathways for dye-sensitized solar cells (DSSCs) process and the photoelectrocatalytic oxidation process, R(0) can be also considered as a quantitative measure of the electron transport resistance of the photoanodes in the DSSC process. The proposed method will provide a simple and rapid alternative to quantitatively evaluate the quality of the TiO(2) photoanodes for DSSCs using R(0) values. A series of TiO(2)/FTO photoanodes with different electron transport resistance were fabricated using conventional screen-printing technique, surface modifications using titanium organic sol and TiCl(4) aqueous solution. R(0) values of the photoanodes were characterized and subsequently used to correlate with the important performance parameters of the corresponding DSSCs. The preliminary results suggest that these surface modifications do not significantly affect the surface area, film thickness, dye loading and optical properties of the TiO(2) film, but significantly decrease the R(0) values. Furthermore, the DSSCs photoanodes with lower R(0) values due to the organic sol or TiCl(4) modification bestow better photovoltaic performance than the corresponding non-modified photoanodes. Therefore, it can be concluded that the performance improvements were mainly attributed to the decrease of the R(0) values, which validates the proposed electrochemical evaluation method.
Online Conductimetric Flow-Through Analyzer Based on Membrane Diffusion for Ammonia Control in Wastewater Treatment Process
Publisher: American Chemical Society (ACS)
Date: 07-06-2019
DOI: 10.1021/ACSSENSORS.9B00768
Abstract: Ammonia is a necessary monitoring parameter that should be controlled within an optimum range in the whole process of wastewater treatment and recycling, but few reliable real-time monitoring technologies are available currently under such harsh water conditions. This study proposes a continuous conductometric flow-through analyzer for ammonia monitoring (CFAA) in the wastewater treatment process. It is developed based on the gas diffusion mechanisms, and the proposed analytical principle has been validated in which the real-time conductivity increment rate is linearly proportional to the real-time ammonia concentration in the s le. This method could be generally applicable in monitoring a wide ammonia concentration range (10.2 μg L
Intrinsic Pseudocapacitive Affinity in Manganese Spinel Ferrite Nanospheres for High-Performance Selective Capacitive Removal of Ca2+ and Mg2+
Publisher: American Chemical Society (ACS)
Date: 10-08-2021
SCRATCHING THE SURFACE OF INTELLIGENT MATERIALS - CHARACTERIZATION METHODS FOR CONDUCTING POLYMER-FILMS
Publisher: SAGE Publications
Date: 09-1994
DOI: 10.1177/1045389X9400500502
Abstract: One essential aspect of an intelligent material is that it has some properties which are dynamic which can be utilised and controlled. It is well known that a number of polymeric materials are inherently dynamic. In order to utilise the full potential of polymers for use as intelligent materials it is imperative that processes occurring at the polymer interface are well understood. A large range of surface and other techniques are available to characterise this. At IPRL we has devel oped over a number of years intelligent material systems based on conducting polymers such as polypyrrole. This range of materials has been used as coated films, particles or stand-alone mem branes in systems designed either to sense/monitor the environment or to effect a separation. Poly pyrrole based systems are able to perform sophisticated functions because the polymer is a dynamic material which can change its chemical and physical properties by application of an electrical poten tial (thereby altering the oxidation state of the polymer). This change is accompanied by movement of ions in and out of the material. The paper presents results for a number of characterisation tech niques which elucidate what is happening at the polymer-solution interface such as cyclic voltametry and quartz crystal microbalance, together with other surface techniques such as scanning electron microscopy and the atomic force microscope which provide a microscopic picture of the polymer surface. It is shown that only by using a wide range of techniques is it possible to gain a full understanding of the unique properties of intelligent material such as polypyrrole. Only then can it be said that one is truly more than just scratching the surface.
How Cobalt and Iron Doping Determine the Oxygen Evolution Electrocatalytic Activity of NiOOH
Publisher: Elsevier BV
Date: 06-2020
3D Fe3O4@Au@Ag nanoflowers assembled magnetoplasmonic chains for in situ SERS monitoring of plasmon-assisted catalytic reactions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA02264B
Abstract: A 3D Fe 3 O 4 @Au@Ag nanoflower assembled magnetoplasmonic chains used for in situ SERS monitoring of catalytic reactions and was constructed with 3D nanoflower shaped silver nanoplates coated on the magnetoplasmonic nanochains via a magnetic field induced assembly.
Tropane alkaloids from the Australian plant Triunia montana (Proteaceae)
Publisher: Elsevier BV
Date: 02-2017
Few‐Layer Graphdiyne Nanosheets Applied for Multiplexed Real‐Time DNA Detection
Publisher: Wiley
Date: 10-03-2017
Abstract: Despite recent progress in 2D nanomaterials-based biosensing, it remains challenging to achieve sensitive and high selective detection. This study develops few-layer graphdiyne (GD) nanosheets (NSs) that are used as novel sensing platforms for a variety of fluorophores real-time detection of DNA with low background and high signal-to-noise ratio, which show a distinguished fluorescence quenching ability and different affinities toward single-stranded DNA and double-stranded DNA. Importantly, for the first time, a few-layer GD NSs-based multiplexed DNA sensor is developed.
Free-standing and bendable carbon nanotubes/TiO2 nanofibres composite electrodes for flexible lithium ion batteries
Publisher: Elsevier BV
Date: 08-2013
Altered Prefrontal and Hippocampal Function During Verbal Encoding and Recognition in People With Prodromal Symptoms of Psychosis
Publisher: Oxford University Press (OUP)
Date: 23-11-2009
Cobalt-based composite films on electrochemically activated carbon cloth as high performance overall water splitting electrodes
Publisher: Elsevier BV
Date: 2019
Biomass-derived N-doped porous carbon as electrode materials for Zn-air battery powered capacitive deionization
Publisher: Elsevier BV
Date: 02-2018
A holistic green system coupling hydrogen production with wastewater valorisation
Publisher: Wiley
Date: 28-06-2022
DOI: 10.1002/EOM2.12254
Abstract: Green hydrogen represents a critical underpinning technology for achieving carbon neutrality. Although researchers often fixate on its energy inputs, a truly ‘green’ hydrogen production process would also be sustainable in terms of water and materials inputs. To address this holistic challenge, we demonstrate a new green hydrogen production system which can utilize secondary wastewater as the input (preserving scarce fresh water supplies for drinking and sanitation). The enabling feature of the proposed system is a self‐grown bifunctional CoNi electrode which consists of ultrathin, spontaneously deposited CoNi nanosheets on a three‐dimensional nickel foam. As such, a green synthesis process was developed using an immersion procedure at room‐temperature with zero net energy input. Testing revealed that the synthesized CoNi electrodes can reach a current density of 10 mA cm −2 at a small overpotential of 197 mV for the hydrogen evolution reaction and 315 mV for the oxygen evolution reaction in alkalified wastewater. The values are ~16.5% and ~6.5% smaller than that from precious catalysts (20 wt% Pt/C and RuO 2 , respectively). Importantly, this CoNi catalyst offers outstanding durability for overall wastewater splitting. A prototype solar‐energy‐powered rooftop wastewater splitting system was constructed and can produce more than 100 L hydrogen on a sunny day in Sydney, Australia. Taken together, these results indicate that it is promising to unlock holistically green routes for hydrogen production by wastewater uplifting with regards to water, energy, and materials synthesis. image
Comparing dissolved reactive phosphorus measured by DGT with ferrihydrite and titanium dioxide adsorbents: Anionic interferences, adsorbent capacity and deployment time
Publisher: Elsevier BV
Date: 07-2011
DOI: 10.1016/J.ACA.2011.04.049
Abstract: Two adsorbents (Metsorb and ferrihydrite) used in binding layers with the diffusive gradients in a thin film technique were evaluated for the measurement of dissolved reactive phosphorous (DRP) in synthetic and natural waters. Possible interferences were investigated with Cl(-) (up to 1.35 mol L(-1)) and SO(4)(2-) (up to 0.056 mol L(-1)) having no affect on either DGT binding layer, and HCO(3)(-) (up to 5.7 mmol L(-1)) having no effect on Metsorb-DGT, over 4 days. However, HCO(3)(-) interfered with the ferrihydrite-DGT measurement at concentrations typical of many natural waters (≥0.7 mmol L(-1)) after a deployment period of 1-2 days. The capacity of the Metsorb binding phase for DGT response was ∼37,000 ng P, whereas the capacities of a low-mass (17.8 mg of adsorbent per DGT s ler) and high-mass (29.2mg of adsorbent per DGT s ler) ferrihydrite binding phase were substantially lower (∼15,000 ng P and ∼25,000 ng P, low-mass and high-mass, respectively). Increasing the capacity of the ferrihydrite adsorbent allowed the ferrihydrite-DGT to be utilized for up to 3 days before interference by HCO(3)(-) was observed. Seawater deployments demonstrated that even high-capacity ferrihydrite-DGT devices underestimated the DRP concentration by 37%, whereas Metsorb-DGT measurements were accurate. The Metsorb-DGT is superior to the ferrihydrite-DGT for determining DRP over deployment times greater than 1 day and in waters with ≥0.7 mmol L(-1) HCO(3)(-). Based on the experience obtained from this detailed validation process, the authors propose a number of key requirements that need to be considered when developing new DGT binding layers, with testing the performance over longer deployment times being critical.
Preparation and characterization of hydrophobic TiO2 pillared clay: The effect of acid hydrolysis catalyst and doped Pt amount on photocatalytic activity
Publisher: Elsevier BV
Date: 04-2008
DOI: 10.1016/J.JCIS.2007.12.042
Abstract: Titanium hydrate sols were prepared using different acid hydrolysis catalysts, i.e., acetic acid and hydrochloric acid. The platinum-doped TiO(2) sol-gels were also synthesized by adding K(2)PtCl(6) into the titanium hydrate sols. The hydrophobic montmorillonite clay, treated with organic cationic surfactant, i.e., hexadecyltrimethylammonium bromide, was used as a template to prepare TiO(2) pillared photocatalyst with the above sols. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray analysis (EDX) were employed to characterize the resulting photocatalysts. The adsorption performance and photoactivity of prepared pillared clays were studied by using methyl orange as a model organic pollutant. The preliminary results indicated that the hydrophobic TiO(2) pillared clay prepared with acetic acid as the acid hydrolysis catalysts possessed higher photocatalytic activity than that with hydrochloric acid. Due to the excellent sedimentation property of the clay, the resulting pillared photocatalyst is easily recovered and reused in the postrun treatment. Also the doping of platinum into the hydrophobic photocatalyst can increase the photocatalytic activity significantly.
Structure disorder of graphitic carbon nitride induced by liquid-assisted grinding for enhanced photocatalytic conversion
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3RA47824F
Abstract: Graphitic-C 3 N 4 with disordered structure was processed for the first time by a liquid-assisted planetary ball milling approach.
Two-Step Activated Carbon Cloth with Oxygen-Rich Functional Groups as a High-Performance Additive-Free Air Electrode for Flexible Zinc-Air Batteries
Publisher: Wiley
Date: 03-12-2019
Numerical Modelling of Pore Pressure Accumulations in Marine Sediments around Submerged Breakwaters under Combined Wave and Current Loadings
Publisher: Coastal Education and Research Foundation
Date: 09-2016
Hydrothermal Transformation of Dried Grass into Graphitic Carbon-Based High Performance Electrocatalyst for Oxygen Reduction Reaction
Publisher: Wiley
Date: 14-04-2014
Abstract: In this work, we present a low cost and environmentally benign hydrothermal method using dried grass as the sole starting material without any synthetic chemicals to directly produce high quality nitrogen-doped carbon nanodot/nanosheet aggregates (N-CNAs), achieving a high yield of 25.2%. The fabricated N-CNAs possess an N/C atomic ratio of 3.41%, consist of three typed of doped N at a ratio of 2.6 (pyridinic):1.7 (pyrrolic):1 (graphitic). The experimental results reveal that for oxygen reduction reaction (ORR), the performance of N-CNAs, in terms of electrocatalytic activity, stability and resistance to crossover effects, is better or comparable to the commercial Pt/C electrocatalyst. The theoretical studies further indicate that the doped pyridinic-N plays a key role for N-CNAs' excellent four-electron ORR electrocatalytic activity.
Origin of reactivity diversity of lattice oxygen in titanates
Publisher: Elsevier BV
Date: 07-2011
Brain connectivity networks and longitudinal trajectories of depression symptoms in adolescence
Publisher: Elsevier BV
Date: 02-2017
DOI: 10.1016/J.PSCYCHRESNS.2016.12.010
Abstract: High levels of depression during adolescence may contribute to the risk for future depression later in life. This study examined the relationship between the developmental timing of depressive symptoms, and brain structural outcomes in late adolescence. In a prior work, we examined longitudinal trajectories of depressive symptoms in 243 adolescents (121 males and 122 females), and identified four subgroups: a normative group with stable low levels of depression, two groups with declining symptoms, and one group with increasing symptoms. For the current paper, diffusion-weighted MRI images were acquired at the final wave of the study, and used to perform white matter tractography and brain network analysis. The four depression trajectory groups were tested for differences in brain connectivity variables. This revealed differences in several frontal and temporal regions. The groups that had experienced elevated depression symptoms in early adolescence differed from the normative group in a greater number of areas than the group who had experienced depression later. Affected tracts corresponded to areas of white matter that are still maturing during this period, particularly frontolimbic regions. These findings support the proposition that the timing and duration of depression symptoms during adolescence are associated with brain structural outcomes.
Density functional theory analysis of structural and electronic properties of orthorhombic perovskite CH3NH3PbI3
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C3CP54479F
Abstract: The organic-inorganic hybrid perovskite CH3NH3PbI3 is a novel light harvester, which can greatly improve the solar-conversion efficiency of dye-sensitized solar cells. In this article, a first-principle theoretical study is performed using local, semi-local and non-local exchange-correlation approximations to find a suitable method for this material. Our results, using the non-local optB86b + vdWDF functional, excellently agree with the experimental data. Thus, consideration of weak van der Waals interactions is demonstrated to be important for the accurate description of the properties of this type of organic-inorganic hybrid materials. Further analysis of the electronic properties reveals that I 5p electrons can be photo-excited to Pb 6p empty states. The main interaction between the organic cations and the inorganic framework is through the ionic bonding between CH3 and I ions. Furthermore, I atoms in the Pb-I framework are found to be chemically inequivalent because of their different chemical environments.
X‐Shaped α‐FeOOH with Enhanced Charge Separation for Visible‐Light‐Driven Photocatalytic Overall Water Splitting
Publisher: Wiley
Date: 23-03-2018
Abstract: Photocatalytic overall water splitting (POWS) is a promising route for converting solar energy into green and sustainable energy. Herein, we report a facile hydrothermal approach for the fabrication of x-shaped α-FeOOH photocatalysts containing high-index facets for POWS. The x-shaped α-FeOOH photocatalysts exhibited enhanced visible-light-driven POWS activities in comparison with that of FeOOH without x-structures, with a maximum H
deGraphCS
: Embedding Variable-based Flow Graph for Neural Code Search
Publisher: Association for Computing Machinery (ACM)
Date: 30-03-2023
DOI: 10.1145/3546066
Abstract: With the rapid increase of public code repositories, developers maintain a great desire to retrieve precise code snippets by using natural language. Despite existing deep learning-based approaches that provide end-to-end solutions (i.e., accept natural language as queries and show related code fragments), the performance of code search in the large-scale repositories is still low in accuracy because of the code representation (e.g., AST) and modeling (e.g., directly fusing features in the attention stage). In this paper, we propose a novel learnable de ep G raph for C ode S earch (called deGraphCS ) to transfer source code into variable-based flow graphs based on an intermediate representation technique, which can model code semantics more precisely than directly processing the code as text or using the syntax tree representation. Furthermore, we propose a graph optimization mechanism to refine the code representation and apply an improved gated graph neural network to model variable-based flow graphs. To evaluate the effectiveness of deGraphCS , we collect a large-scale dataset from GitHub containing 41,152 code snippets written in the C language and reproduce several typical deep code search methods for comparison. The experimental results show that deGraphCS can achieve state-of-the-art performance and accurately retrieve code snippets satisfying the needs of the users.
Three-Dimensional Graphene/Metal Oxide Nanoparticle Hybrids for High-Performance Capacitive Deionization of Saline Water
Publisher: Wiley
Date: 20-08-2013
Notable hydrogen production on LaxCa1−xCoO3 perovskites via two-step thermochemical water splitting
Publisher: Springer Science and Business Media LLC
Date: 16-01-2018
A reagent-free tubular biofilm reactor for on-line determination of biochemical oxygen demand
Publisher: Elsevier BV
Date: 07-2013
DOI: 10.1016/J.BIOS.2013.01.041
Abstract: We reported a reagent-free tubular biofilm reactor (BFR) based analytical system for rapid online biochemical oxygen demand (BOD) determination. The BFR was cultivated using microbial seeds from activated sludge. It only needs tap water to operate and does not require any chemical reagent. The analytical performance of this reagent-free BFR system was found to be equal to or better than the BFR system operated using phosphate buffer saline (PBS) and high purity deionized water. The system can readily achieve a limit of detection of 0.25 mg O2 L(-1), possessing superior reproducibility, and long-term operational and storage stability. More importantly, we confirmed for the first time that the BFR system is capable of tolerating common toxicants found in wastewaters, such as 3,5-dichlorophenol and Zn(II), Cr(VI), Cd(II), Cu(II), Pb(II), Mn(II) and Ni(II), enabling the method to be applied to a wide range of wastewaters. The sloughing and clogging are the important attributes affecting the operational stability, hence, the reliability of most online wastewater monitoring systems, which can be effectively avoided, benefiting from the tubular geometry of the reactor and high flow rate conditions. These advantages, coupled with simplicity in device, convenience in operation and minimal maintenance, make such a reagent-free BFR analytical system promising for practical BOD online determination.
Edges of FeO/Pt(111) Interface: A First-Principle Theoretical Study
Publisher: American Chemical Society (ACS)
Date: 15-01-2013
DOI: 10.1021/JP310950E
Influence of Sugarcane Variety on Rhizosphere Microbiota Under Irrigated and Water-Limiting Conditions
Publisher: Springer Science and Business Media LLC
Date: 14-07-2022
DOI: 10.1007/S00284-022-02946-X
Abstract: Drought is one of the main problems linked to climate change that is faced by agriculture, affecting various globally important crops, including sugarcane. Environmentally sustainable strategies have been sought to mitigate the effects of climate change on crops. Among them, the use of beneficial microorganisms offers a promising approach. However, it is still necessary to understand the mechanisms that regulate plant-microorganism interactions, in normal situations and under stress. In this work, the rhizosphere metagenomes of two sugarcane varieties, one resistant and the other susceptible to drought, were compared under normal conditions and under water-limiting conditions. The results showed that for the drought-resistant sugarcane variety, bacteria belonging to the order Sphingomonadales and the family Xanthomonadaceae presented increased activities in terms of mobility, colonization, and cell growth. In contrast, the rhizosphere associated with the drought-sensitive variety exhibited increases of bacteria belonging to the family Polyangiaceae, and the genus Streptomyces, with modifications in DNA metabolism and ribosome binding proteins. The results pointed to variation in the rhizosphere microbiota that was modulated by the host plant genotype, revealing potential bacterial candidates that could be recruited to assist plants during water-limiting conditions.
Emerging electrocatalysts for electrochemical advanced oxidation processes (EAOPs): recent progress and perspectives
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2QM01294D
Abstract: The global water crisis is among the most pressing challenges facing humankind.
Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb3O7(OH) and Nb2O5 Superstructures for Energy Storage and Conversion Applicati
Publisher: American Chemical Society (ACS)
Date: 23-11-2015
Abstract: Three-dimensional (3D) metal oxide superstructures have demonstrated great potentials for structure-dependent energy storage and conversion applications. Here, we reported a facile hydrothermal method for direct growth of highly ordered single crystalline nanowire array assembled 3D orthorhombic Nb3O7(OH) superstructures and their subsequent thermal transformation into monoclinic Nb2O5 with well preserved 3D nanowire superstructures. The performance of resultant 3D Nb3O7(OH) and Nb2O5 superstructures differed remarkably when used for energy conversion and storage applications. The thermally converted Nb2O5 superstructures as anode material of lithium-ion batteries (LiBs) showed higher capacity and excellent cycling stability compared to the Nb3O7(OH) superstructures, while directly hydrothermal grown Nb3O7(OH) nanowire superstructure film on FTO substrate as photoanode of dye-sensitized solar cells (DSSCs) without the need for further calcination exhibited an overall light conversion efficiency of 6.38%, higher than that (5.87%) of DSSCs made from the thermally converted Nb2O5 film. The high energy application performance of the niobium-based nanowire superstructures with different chemical compositions can be attributed to their large surface area, superior electron transport property, and high light utilization efficiency resulting from a 3D superstructure, high crystallinity, and large sizes. The formation process of 3D nanowire superstructures before and after thermal treatment was investigated and discussed based on our theoretical and experimental results.
Co9S8@N,P-doped porous carbon electrocatalyst using biomass-derived carbon nanodots as a precursor for overall water splitting in alkaline media
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA01798G
Abstract: Using biomass-derived carbon nanodots as a precursor, Co 9 S 8 @N,P-doped porous carbon was fabricated by a molten-salt calcination and post-phosphorization method, and exhibits HER and OER bifunctional catalytic activity.
Natural magnetic pyrrhotite as a high-Efficient persulfate activator for micropollutants degradation: Radicals identification and toxicity evaluation
Publisher: Elsevier BV
Date: 10-2017
DOI: 10.1016/J.JHAZMAT.2017.07.029
Abstract: This study discusses the SO
Widespread decreased grey and white matter in paediatric obsessive-compulsive disorder (OCD): A voxel-based morphometric MRI study
Publisher: Elsevier BV
Date: 07-2013
DOI: 10.1016/J.PSCYCHRESNS.2013.02.003
Abstract: Obsessive-compulsive disorder (OCD) is a chronic, relapsing anxiety disorder. To date, neuroimaging investigations of OCD have been variable and few studies have examined paediatric populations. Eight children with OCD and 12 typically developing children matched for age, gender, handedness and performance IQ underwent a high resolution T1-weighted structural magnetic resonance imaging (MRI) scan. A voxel-based morphometry (VBM) protocol (using DARTEL) compared the brains of the paediatric OCD children with those of typically developing children. Overall, children with OCD demonstrated significantly lower intra-cranial volume (ICV) and grey- and white-matter volumes. ICV was significantly reduced (∼9%) in the OCD group compared with the typically developing group. The VBM analysis demonstrated lower volumes in widespread grey matter in bilateral frontal, cingulate, temporal-parietal, occipital-frontal and right precuneus regions for OCD. Lower white matter volume was found bilaterally in the cingulate and occipital cortex, right frontal and parietal and left temporal regions, and the corpus callosum. In summary, this study provides further evidence of brain dysmorphology in paediatric OCD patients. In addition to fronto-striatal-thalamic neural networks, abnormalities in other brain regions, such as the parietal lobe and corpus callosum, were demonstrated. These brain regions may play an additional role in the pathophysiology of OCD.
A novel method developed for estimating mineralization efficiencies and its application in PC and PEC degradations of large molecule biological compounds with unknown chemical formula
Publisher: Elsevier BV
Date: 05-2016
DOI: 10.1016/J.WATRES.2016.02.066
Abstract: A new method to estimate the photocatalytic (PC) and photoelectrocatalytic (PEC) mineralization efficiencies of large molecule biological compounds with unknown chemical formula in water was firstly developed and experimentally validated. The method employed chemical oxidation under the standard dichromate chemical oxygen demand (COD) conditions to obtain QCOD values of model compounds with unknown chemical formula. The measured QCOD values were used as the reference to replace QCOD values of model compounds for calculation of the mineralization efficiencies (in %) by assuming the obtained QCOD values are the measure of the theoretical charge required for the complete mineralization of organic pollutants. Total organic carbon (TOC) was also employed as a reference to confirm the mineralization capacity of dichromate chemical oxidation. The developed method was applied to determine the degradation extent of model compounds, such as bovine serum albumin (BSA), lecithin and bacterial DNA, by PC and PEC. Incomplete PC mineralization of all large molecule biological compounds was observed, especially for BSA. But the introduction of electrochemical technique into a PC oxidation process could profoundly improve the mineralization efficiencies of model compounds. PEC mineralization efficiencies of bacterial DNA was the highest, while that of lecithin was the lowest. Overall, PEC degradation method was found to be much effective than PC method for all large molecule biological compounds investigated, with PEC/PC mineralization ratios followed an order of BSA > lecithin > DNA.
Fabrication of hierarchically porous NH2-MIL-53/wood-carbon hybrid membrane for highly effective and selective sequestration of Pb2+
Publisher: Elsevier BV
Date: 05-2020
Controlled synthesis of octahedral Cu2O on TiO2 nanotube arrays by electrochemical deposition
Publisher: Elsevier BV
Date: 10-2011
Six-year follow-up of patients receiving imatinib for the first-line treatment of chronic myeloid leukemia
Publisher: Springer Science and Business Media LLC
Date: 12-03-2009
DOI: 10.1038/LEU.2009.38
Abstract: Imatinib mesylate is considered standard of care for first-line treatment of chronic phase chronic myeloid leukemia (CML-CP). In the phase III, randomized, open-label International Randomized Study of Interferon vs STI571 (IRIS) trial, previously untreated CML-CP patients were randomized to imatinib (n=553) or interferon-alpha (IFN) plus cytarabine (n=553). This 6-year update focuses on patients randomized to receive imatinib as first-line therapy for newly diagnosed CML-CP. During the sixth year of study treatment, there were no reports of disease progression to accelerated phase (AP) or blast crisis (BC). The toxicity profile was unchanged. The cumulative best complete cytogenetic response (CCyR) rate was 82% 63% of all patients randomized to receive imatinib and still on study treatment showed CCyR at last assessment. The estimated event-free survival at 6 years was 83%, and the estimated rate of freedom from progression to AP and BC was 93%. The estimated overall survival was 88% -- or 95% when only CML-related deaths were considered. This 6-year update of IRIS underscores the efficacy and safety of imatinib as first-line therapy for patients with CML.
Liberating N‐CNTs Confined Highly Dispersed CoNx Sites for Selective Hydrogenation of Quinolines
Publisher: Wiley
Date: 17-10-2019
Abstract: Selective hydrogenation of quinoline and its derivatives is an important means to produce corresponding 1,2,3,4-tetrahydroquinolines for a wide spectrum of applications. A facile and efficient "laser irradiation in liquid" technique to liberate the inaccessible highly dispersed CoN
Opposite Effects of Δ-9-Tetrahydrocannabinol and Cannabidiol on Human Brain Function and Psychopathology
Publisher: Springer Science and Business Media LLC
Date: 18-11-2009
DOI: 10.1038/NPP.2009.184
Protocol for a prospective, longitudinal, cohort study of postconcussive symptoms in children: the Take C.A.Re (Concussion Assessment and Recovery Research) study
Publisher: BMJ
Date: 2016
Effects of yttrium additions on the electrode performance of magnesium-based hydrogen storage alloys
Publisher: Elsevier BV
Date: 1996
Manganese oxides transformed from orthorhombic phase to birnessite with enhanced electrochemical performance as supercapacitor electrodes
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA12297D
Abstract: Birnessite δ-MnO 2 has been successfully synthesized from orthorhombic γ-MnO 2 via a facile phase transformation strategy, exhibiting significantly enhanced electrochemical energy storage capacity as supercapacitor electrodes.
Soft-template assisted synthesis of mesoporous CuO/Cu2O composite hollow microspheres as efficient visible-light photocatalyst
Publisher: Elsevier BV
Date: 11-2016
Deficits in source monitoring in subjects with auditory hallucinations may be due to differences in verbal intelligence and verbal memory
Publisher: Informa UK Limited
Date: 11-1997
A Theoretical Model for Immobilized Enzyme Inhibition Biosensors
Publisher: Wiley
Date: 12-2001
DOI: 10.1002/1521-4109(200112)13:18<1528::AID-ELAN1528>3.0.CO;2-1
EcoMat: Join us in the pursuit of functional materials for green energy and environment
Publisher: Wiley
Date: 12-2019
DOI: 10.1002/EOM2.12009
One-Step Fabrication of High Performance Micro/Nanostructured Fe3S4-C magnetic adsorbent with easy recovery and regeneration properties
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3CE26856J
One-pot redox synthesis of Pt/Fe3O4 catalyst for efficiently chemoselective hydrogenation of cinnamaldehyde
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7RA02898A
Abstract: The Pt/Fe 3 O 4 catalyst is prepared by a redox method. Benefiting from the electronic effect between Pt and Fe 3 O 4 , the adsorption of CO bond upon cinnamaldehyde is superior than that of CC bond, resulting in high catalytic activity and selectivity.
Effect of image analysis software on neurofunctional activation during processing of emotional human faces
Publisher: Elsevier BV
Date: 03-2010
DOI: 10.1016/J.JOCN.2009.06.027
Abstract: Functional brain imaging techniques such as functional MRI (fMRI) that allow the in vivo investigation of the human brain have been exponentially employed to address the neurophysiological substrates of emotional processing. Despite the growing number of fMRI studies in the field, when taken separately these in idual imaging studies demonstrate contrasting findings and variable pictures, and are unable to definitively characterize the neural networks underlying each specific emotional condition. Different imaging packages, as well as the statistical approaches for image processing and analysis, probably have a detrimental role by increasing the heterogeneity of findings. In particular, it is unclear to what extent the observed neurofunctional response of the brain cortex during emotional processing depends on the fMRI package used in the analysis. In this pilot study, we performed a double analysis of an fMRI dataset using emotional faces. The Statistical Parametric Mapping (SPM) version 2.6 (Wellcome Department of Cognitive Neurology, London, UK) and the XBAM 3.4 (Brain Imaging Analysis Unit, Institute of Psychiatry, Kings College London, UK) programs, which use parametric and non-parametric analysis, respectively, were used to assess our results. Both packages revealed that processing of emotional faces was associated with an increased activation in the brain's visual areas (occipital, fusiform and lingual gyri), in the cerebellum, in the parietal cortex, in the cingulate cortex (anterior and posterior cingulate), and in the dorsolateral and ventrolateral prefrontal cortex. However, blood oxygenation level-dependent (BOLD) response in the temporal regions, insula and putamen was evident in the XBAM analysis but not in the SPM analysis. Overall, SPM and XBAM analyses revealed comparable whole-group brain responses. Further studies are needed to explore the between-group compatibility of the different imaging packages in other cognitive and emotional processing domains.
UV-cured natural polymer-based membrane for biosensor application
Publisher: Wiley
Date: 2000
DOI: 10.1002/1097-4628(20010118)79:3<466::AID-APP90>3.0.CO;2-F
Hyper-Branched Cu@Cu2O Coaxial Nanowires Mesh Electrode for Ultra-Sensitive Glucose Detection.
Publisher: American Chemical Society (ACS)
Date: 27-07-2015
Abstract: Electrode design in nanoscale is expected to contribute significantly in constructing an enhanced electrochemical platform for a superb sensor. In this work, we present a facile synthesis of new fashioned heteronanostructure that is composed of one-dimensional Cu nanowires (NWs) and epitaxially grown two-dimensional Cu2O nanosheets (NSs). This hierarchical architecture is quite attractive in molecules detection for three unique characteristics: (1) the three-dimensional hierarchical architecture provides large specific surface areas for more active catalytic sites and easy accessibility for the target molecules (2) the high-quality heterojunction with minimal lattice mismatch between the built-in current collector (Cu core) and active medium (Cu2O shell) considerably promotes the electron transport (3) the adequate free space between branches and anisotropic NWs can accommodate a large volume change to avoid collapse or distortion during the reduplicative operation processes under applied potentials. The above three proposed advantages have been addressed in the fabricated Cu@Cu2O NS-NW-based superb glucose sensors, where a successful integration of ultrahigh sensitivity (1420 μA mM(-1) cm(-2)), low limit of detection (40 nM), and fast response (within 0.1 s) has been realized. Furthermore, the durability and reproducibility of such devices made by branched core-shell nanowires were investigated to prove viability of the proposed structures. This achievement in current work demonstrates an innovative strategy for nanoscale electrode design and application in molecular detection.
Controllable chaos in hybrid electro-optomechanical systems
Publisher: Springer Science and Business Media LLC
Date: 07-03-2016
DOI: 10.1038/SREP22705
Abstract: We investigate the nonlinear dynamics of a hybrid electro-optomechanical system (EOMS) that allows us to realize the controllable opto-mechanical nonlinearity by driving the microwave LC resonator with a tunable electric field. A controllable optical chaos is realized even without changing the optical pumping. The threshold and lifetime of the chaos could be optimized by adjusting the strength, frequency, or phase of the electric field. This study provides a method of manipulating optical chaos with an electric field. It may offer the prospect of exploring the controllable chaos in on-chip optoelectronic devices and its applications in secret communication.
The influence of biochar type on long-term stabilization for Cd and Cu in contaminated paddy soils
Publisher: Elsevier BV
Date: 03-2016
DOI: 10.1016/J.JHAZMAT.2015.10.048
Abstract: Long-term effect of biochar on PTEs (potential toxic elements) immobilization depends upon biochar own property and its aging process in soil. To understand the role of biachar type on PTEs stabilization, two types of biochar, corn-straw-derived biochar (CB) and hardwood-derived biochar (HB), were compared for their efficacy in achieving a stable decrease in the bio-availability of Cd and Cu in soils. The 3-year pot-culture experiment showed that HB reduced the concentration of CaCl2-extractable Cd and Cu by 57.9 and 63.8% in soil, and Cd and Cu uptake by 63.6 and 56.3% in rice tissue respectively, in the first year, whereas these values increased in the next two years. On the other hand, CB decreased these values steadily year by year. At the end of the 3 years, CB at 5% level had lowered the levels of CaCl2-extractable Cd and Cu by 53.6 and 66.8%, respectively. These variations between CB and HB were due to the differences in the way the two types of biochar age in the soil. The aging process was simulated in the laboratory, and the XPS results showed that the oxidization of the biochars introduced more oxygen-containing groups (especially carboxyl) on the surface of CB than HB, leading to a correspondingly greater number of oxygenated binding sites for Cd and Cu in the case of CB. The content of lignin was the major factor resulting in the variation of oxidation degree in two biochars. These results suggest that it is important to select the right kind of biochar to stably decrease the bio-availability of potential toxic elements (Cd and Cu) in contaminated soils.
Vapor-phase hydrothermal transformation of a nanosheet array structure Ni(OH)2 into ultrathin Ni3S2 nanosheets on nickel foam for high-efficiency overall water splitti
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA07162D
Abstract: Ultrathin Ni 3 S 2 nanosheets grown on nickel foam are thermodynamically favourable for hydrazine adsorption and oxidation, exhibiting superior H 2 generation performance.
Electrodeposition preparation of octahedral-Cu2O-loaded TiO2 nanotube arrays for visible light-driven photocatalysis
Publisher: Elsevier BV
Date: 07-2010
Characterization of Photoelectrocatalytic Processes at Nanoporous TiO2 Film Electrodes: Photocatalytic Oxidation of Glucose
Publisher: American Chemical Society (ACS)
Date: 23-10-2003
DOI: 10.1021/JP0307349
A Gradient Heterostructure Based on Tolerance Factor in High-Performance Perovskite Solar Cells with 0.84 Fill Factor.
Publisher: Wiley
Date: 28-11-2018
Abstract: A gradient heterosturcture is one of the basic methods to control the charge flow in perovskite solar cells (PSCs). However, a classical route for gradient heterosturctures is based on the diffusion technique, in which the guest ions gradually diffuse into the films from a concentrated source of dopants. The gradient heterosturcture is only accessible to the top side, and may be time consuming and costly. Here, the "intolerant" n-type heteroatoms (Sb
Pseudocapacitance of Cl-Terminated MXene Nanosheets for Efficient Chloride-Ion Hybrid Capacitors
Publisher: American Chemical Society (ACS)
Date: 09-03-2023
Development of a quantitative relationship between inhibition percentage and both incubation time and inhibitor concentration for inhibition biosensors—theoretical and practical considerations
Publisher: Elsevier BV
Date: 12-2001
DOI: 10.1016/S0956-5663(01)00240-8
Abstract: Theoretical and practical insights into the design and development of immobilised enzyme inhibition biosensors are reported. A general mathematical expression relating the percent of enzyme inhibition (i.e. the analytical signal) to both the inhibitor concentration and the incubation time is presented. The relevant physical, chemical and biochemical parameters required by the model are developed and discussed in terms of the inhibition of acetylcholinesterase by the organophosphorous pesticide, paraoxon. A second enzyme, choline oxidase and an erometric transducer are used to facilitate the determination acetylcholinesterase inhibitor.
Formation and manipulation of optomechanical chaos via a bichromatic driving
Publisher: American Physical Society (APS)
Date: 20-10-2014
A Band‐Edge Potential Gradient Heterostructure to Enhance Electron Extraction Efficiency of the Electron Transport Layer in High‐Performance Perovskite Solar Cells
Publisher: Wiley
Date: 15-05-2017
Correction: Electrocatalytic oxidation of benzyl alcohol for simultaneously promoting H2 evolution by a Co0.83Ni0.17/activated carbon electrocatalyst
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9NJ90061F
Abstract: Correction for ‘Electrocatalytic oxidation of benzyl alcohol for simultaneously promoting H 2 evolution by a Co 0.83 Ni 0.17 /activated carbon electrocatalyst’ by Guoqiang Liu et al. , New J. Chem. , 2018, 42 , 6381–6388.
Fe‐Co Alloyed Nanoparticles Catalyzing Efficient Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in Water
Publisher: Wiley
Date: 23-10-2020
Modulation of Mediotemporal and Ventrostriatal Function in Humans by Δ9-Tetrahydrocannabinol
Publisher: American Medical Association (AMA)
Date: 04-2009
DOI: 10.1001/ARCHGENPSYCHIATRY.2009.17
Abstract: Cannabis sativa use can impair verbal learning, provoke acute psychosis, and increase the risk of schizophrenia. It is unclear where C. sativa acts in the human brain to modulate verbal learning and to induce psychotic symptoms. To investigate the effects of 2 main psychoactive constituents of C. sativa, Delta9-tetrahydrocannabinol (Delta9-THC) and cannabidiol, on regional brain function during verbal paired associate learning. Subjects were studied on 3 separate occasions using a block design functional magnetic resonance imaging paradigm while performing a verbal paired associate learning task. Each imaging session was preceded by the ingestion of Delta9-THC (10 mg), cannabidiol (600 mg), or placebo in a double-blind, randomized, placebo-controlled, repeated-measures, within-subject design. University research center. Fifteen healthy, native English-speaking, right-handed men of white race/ethnicity who had used C. sativa 15 times or less and had minimal exposure to other illicit drugs in their lifetime. Regional brain activation (blood oxygen level-dependent response), performance in a verbal learning task, and objective and subjective ratings of psychotic symptoms, anxiety, intoxication, and sedation. Delta9-Tetrahydrocannabinol increased psychotic symptoms and levels of anxiety, intoxication, and sedation, whereas no significant effect was noted on these parameters following administration of cannabidiol. Performance in the verbal learning task was not significantly modulated by either drug. Administration of Delta9-THC augmented activation in the parahippoc al gyrus during blocks 2 and 3 such that the normal linear decrement in activation across repeated encoding blocks was no longer evident. Delta9-Tetrahydrocannabinol also attenuated the normal time-dependent change in ventrostriatal activation during retrieval of word pairs, which was directly correlated with concurrently induced psychotic symptoms. In contrast, administration of cannabidiol had no such effect. The modulation of mediotemporal and ventrostriatal function by Delta9-THC may underlie the effects of C. sativa on verbal learning and psychotic symptoms, respectively.
Carbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions
Publisher: Springer Science and Business Media LLC
Date: 08-06-2017
Zirconium metal organic frameworks-based DGT technique for in situ measurement of dissolved reactive phosphorus in waters
Publisher: Elsevier BV
Date: 12-2018
DOI: 10.1016/J.WATRES.2018.10.003
Abstract: In an effort to provide early warnings for the occurrence of eutrophication, it is highly desirable to develop an accurate and efficient technique to ensure continuous monitoring of dissolved reactive phosphorus (DRP) in the aquatic environment from the viewpoint of environmental management. Herein, a new diffusive gradient in thin film (DGT) technique was developed and evaluated for in situ measurement of DRP in waters, in which Zr-based metal organic frameworks (MOFs, UiO-66) were utilized as aqueous binding agent (abbreviated as UiO-66 DGT). As expected, the UiO-66 DGT demonstrated high uptake capacity towards phosphorus (20.8 μg P cm
Nature of visible-light responsive fluorinated titanium dioxides
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3TA12506H
Photoelectrochemical measurement of phthalic acid adsorption on porous TiO2 film electrodes
Publisher: Elsevier BV
Date: 03-2003
Ruthenium single-atom modulated Ti3C2Tx MXene for efficient alkaline electrocatalytic hydrogen production
Publisher: Wiley
Date: 31-08-2023
DOI: 10.1002/EOM2.12274
Abstract: Single‐atoms (SAs) supported on various substrates have emerged as a new form of electrocatalysts for hydrogen evolution reaction (HER). The exfoliated MXenes possess rich defects/vacancies and surface oxygen groups, can be favorably utilized to anchor SAs. Here, we take advantage of the exfoliated Ti 3 C 2 T x to anchor Ru‐SAs on Ti 3 C 2 T x through a wet‐chemistry impregnation process. The obtained Ru SA @Ti 3 C 2 T x possesses excellent HER activity, especially under high current densities. Remarkably, Ru SA @Ti 3 C 2 T x can readily attain high current densities of 1 and 1.5 A cm −2 at low over potentials of 425.7 and 464.6 mV, respectively, demonstrating its potential for practical applications. The A 1g vibration frequency shift of the Raman spectrum is innovatively used to probe the surface OH coverage on Ti 3 C 2 T x , providing critical information for mechanistic studies. The experimental and theoretical studies reveal that the superior HER electrocatalytic activity of Ru SA @Ti 3 C 2 T x results from the Ru‐SAs enhanced H 2 O adsorption and dissociation, and promoted H 2 formation. image
Revisiting the Electrified Pt(111)/Water Interfaces through an Affordable Double-Reference Ab Initio Approach
Publisher: American Chemical Society (ACS)
Date: 22-09-2023
Meaningful comparison of photocatalytic properties of {001} and {101} faceted anatase TiO2 nanocrystals
Publisher: Elsevier BV
Date: 07-2016
Adaptive Membrane Systems Based on Conductive Electroactive Polymers
Publisher: SAGE Publications
Date: 1993
DOI: 10.1177/1045389X9300400105
Abstract: The development of membrane systems that are adaptive-whose physical and/or chemical properties can be manipulated after synthesis—expands the applicability of membrane technology. In this work, we have employed both polyaniline and polypyrrole based membranes to demonstrate how transport of ionic species can be regulated using external electrical stimuli. In the case of polyaniline membranes, the transport of various acids has been studied and with polypyrrole, transport of simple cations such as potassium and sodium with chloride as counterions has been in vestigated.
Determination of chemical oxygen demand of nitrogenous organic compounds in wastewater using synergetic photoelectrocatalytic oxidation effect at TiO2 nanostructured electrode
Publisher: Elsevier BV
Date: 11-2012
DOI: 10.1016/J.ACA.2012.10.008
Abstract: Chemical oxygen demand (COD) is one of the most important parameters in water quality assessment and monitoring. The natural degradation of nitrogenous organic compounds (NOCs) in water requires significant amounts of oxygen. In the determination of standard COD however, NOCs are persistent compounds that cannot be completely oxidized even in the most oxidative chemical environments, i.e. the reaction media that contain high concentrations of dichromate in strong acid at high temperature. Consequently, the measured COD values of wastewater s les containing NOCs are commonly lower than theoretical COD values and do not reflect the actual oxygen demand of the water body. This problem is partially alleviated when the photoelectrochemical method for COD determination (PeCOD) based on nanostructured TiO(2) photoanode is utilized. To completely overcome this problem, a synergetic photoelectrochemical oxidation effect in thin layer cells is used to achieve complete oxidation of NOCs. This is done by the simple addition of a hydroxyl organic compound (i.e. glucose) into the test s le before the PeCOD measurement. Preliminary experimental results demonstrate that the synergetic PeCOD method provides an effective and reliable means to measure COD values of NOC-containing pollutants without the need for toxic or expensive reagents.
Switching the photocatalytic activity of g-C3N4 by homogenous surface chemical modification with nitrogen residues and vacancies
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA00150A
Abstract: A facile two-step homogenous approach is established to produce and control the nitrogen vacancies on the g-C 3 N 4 photocatalysts.
Pulsed electrochemical detection of proteins using conducting polymer based sensors
Publisher: Elsevier BV
Date: 10-1995
A co-immobilized mediator and microorganism mediated method combined pretreatment by TiO2 nanotubes used for BOD measurement
Publisher: Elsevier BV
Date: 05-2012
DOI: 10.1016/J.TALANTA.2012.02.039
Abstract: In this paper, we proposed a method by using co-immobilized Escherichia coli (E. coli) as a biocatalyst and neutral red (NR) as an artificial electronic acceptor to modify glassy carbon electrode (GCE) for biochemical oxygen demand (BOD) measurement. Two different modification approaches of GCE were utilized and compared. In one approach, NR was electropolymerized on the surface of GCE, and E. coli cells were mixed with grafting copolymer PVA-g-PVP (briefly gPVP) and covered on NR polymer film to obtain a (gPVP/E. coli)/PNR/GCE. In the second approach, both NR and E. coli cells were mixed with the copolymer gPVP and modified GCE, after drying, which was electrochemically treated similar as above for obtaining a (gPVP/E. coli/NR)p/GCE. Based on the electrochemical evaluation, the performance of the latter was better, which may be caused by that the NR deposited on the surface of E. coli resulting in a good electron transport and permeability of cells membrane. To develop the results obtained at (gPVP/E. coli/NR)p/GCE further, the pretreatment by TiO(2) nanotubes arrays (TNTs) was employed, and different effects on s les of GGA, OECD, urea and real wastewater were evaluated. These results suggest that the present method holds a potential application for rapid BOD biosensor.
Ultrathin metal–organic framework nanosheets for electrocatalytic oxygen evolution
Publisher: Springer Science and Business Media LLC
Date: 28-11-2016
Housing Sulfur in Polymer Composite Frameworks for Li–S Batteries
Publisher: Springer Science and Business Media LLC
Date: 27-02-2019
DOI: 10.1007/S40820-019-0249-1
Abstract: Extensive efforts have been devoted to the design of micro-, nano-, and/or molecular structures of sulfur hosts to address the challenges of lithium–sulfur (Li–S) batteries, yet comparatively little research has been carried out on the binders in Li–S batteries. Herein, we systematically review the polymer composite frameworks that confine the sulfur within the sulfur electrode, taking the roles of sulfur hosts and functions of binders into consideration. In particular, we investigate the binding mechanism between the binder and sulfur host (such as mechanical interlocking and interfacial interactions), the chemical interactions between the polymer binder and sulfur (such as covalent bonding, electrostatic bonding, etc.), as well as the beneficial functions that polymer binders can impart on Li–S cathodes, such as conductive binders, electrolyte intake, adhesion strength etc. This work could provide a more comprehensive strategy in designing sulfur electrodes for long-life, large-capacity and high-rate Li–S battery.
All-optical control of optical frequency combs via quantum interference effects in a single-emitter-microcavity system
Publisher: American Physical Society (APS)
Date: 26-06-2015
Formation of Septuple‐Shelled (Co2/3Mn1/3)(Co5/6Mn1/6)2O4 Hollow Spheres as Electrode Material for Alkaline Rechargeable Battery
Publisher: Wiley
Date: 06-07-2017
Abstract: The multishelled (Co 2/3 Mn 1/3 )(Co 5/6 Mn 1/6 )2O 4 hollow microspheres with controllable shell numbers up to septuple shells are synthesized using developed sequential templating method. Exhilaratingly, the septuple‐shelled complex metal oxide hollow microsphere is synthesized for the first time by doping Mn into Co 3 O 4 , leading to the change of crystalline rate of precursor. Used as electrode materials for alkaline rechargeable battery, it shows a remarkable reversible capacity (236.39 mAh g −1 at a current density of 1 A g −1 by three‐electrode system and 106.85 mAh g −1 at 0.5 A g −1 in alkaline battery) and excellent cycling performance due to its unique structure.
Real-time on-site monitoring of soil ammonia emissions using membrane permeation-based sensing probe
Publisher: Elsevier BV
Date: 11-2021
Age, sex, and puberty related development of the corpus callosum: a multi-technique diffusion MRI study
Publisher: Cold Spring Harbor Laboratory
Date: 12-09-2017
DOI: 10.1101/187724
Abstract: The corpus callosum is integral to the central nervous system, and continually develops with age by virtue of increasing axon diameter and ongoing myelination. Magnetic resonance imaging (MRI) techniques offer a means to disentangle these two aspects of white matter development. We investigate the profile of microstructural metrics across the corpus callosum, and assess the impact of age, sex and pubertal development on these processes. This study made use of two independent paediatric populations. Multi-shell diffusion MRI data were analysed to produce a suite of diffusion tensor imaging (DTI), neurite orientation density and dispersion imaging (NODDI), and apparent fibre density (AFD) metrics. A multivariate profile analysis was performed for each diffusion metric across 10 sub isions of the corpus callosum. All diffusion metrics significantly varied across the length of the corpus callosum. AFD exhibited a strong relationship with age across the corpus callosum (partial η 2 = .65), particularly in the posterior body of the corpus callosum (partial η 2 = .72). In addition, females had significantly higher AFD compared with males, most markedly in the anterior splenium (partial η 2 = .14) and posterior genu (partial η 2 = .13). Age-matched pubertal group differences were localised to the splenium. We present evidence of a strong relationship between apparent fibre density and age, sex, and puberty during development. These results are consistent with ex vivo studies of fibre morphology, providing insights into the dynamics of axonal development in childhood and adolescence using diffusion MRI. Brain Structure & Function HBM NeuroImage Developmental Cognitive Neuroscience
Cross-linked ZnIn 2 S 4 /rGO composite photocatalyst for sunlight-driven photocatalytic degradation of 4-nitrophenol
Publisher: Elsevier BV
Date: 06-2015
Controlled growth of CuO/Cu2O hollow microsphere composites as efficient visible-light-active photocatalysts
Publisher: Elsevier BV
Date: 07-2016
Highly selective liquid-phase hydrogenation of furfural over N-doped carbon supported metallic nickel catalyst under mild conditions
Publisher: Elsevier BV
Date: 03-2017
NiCo alloy‐anchored self‐supporting carbon foam as a bifunctional oxygen electrode for rechargeable and flexible Zn–air batteries
Publisher: Wiley
Date: 22-05-2023
Abstract: The design and fabrication of flexible, porous, conductive electrodes with customizable functions become the prime challenge in the development of new‐generation wearable electronics, especially for rechargeable batteries. Here, the NiCo bialloy particulate catalyst‐loaded self‐supporting carbon foam framework (NiCo@SCF) as a flexible electrode has been fabricated through one facile adsorption‐pyrolysis method using a commercial melamine foam. Compared with the electrode with Pt/C and Ir/C benchmark catalysts, the NiCo@SCF electrode exhibited superior bifunctional electrocatalytic performance in alkaline media with a half‐wave potential of 0.906 V for oxygen reduction reaction, an overpotential of 286 mV at j = 10 mA cm −2 for oxygen evolution reaction, and stable bifunctional performance with a small degradation after 20,000 voltammetric cycles. The as‐assembled aqueous zinc–air battery (ZAB) with NiCo@SCF as a self‐supporting air cathode demonstrated a high peak power density of 178.6 mW cm −2 at a current density of 10 mA cm −2 and a stable voltage gap of 0.94 V over a 540 h charge−discharge operation. Remarkably, the as‐assembled flexible solid‐state ZAB with self‐supporting NiCo@SCF as the air cathode presented an engaging peak power density of 80.1 mW cm −2 and excellent durability of 95 h undisrupted operation, showing promise for the design of wearable ZAB. The demonstrated electrode fabrication approach exemplifies a facile, large‐scale avenue toward functional electrodes, potentially extendable to other wearable electronics for broader applications.
Correlating photons using the collective nonlinear response of atoms weakly coupled to an optical mode
Publisher: Springer Science and Business Media LLC
Date: 21-09-2020
3D graphene/δ-MnO2 aerogels for highly efficient and reversible removal of heavy metal ions
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5TA08106H
Abstract: 3D graphene/δ-MnO 2 aerogels demonstrated high removal efficiency, fast adsorption kinetics, excellent regeneration towards heavy metal ions based on the perfect integration of surface adsorption and in-depth bulk uptake.
TRANSPORT OF COPPER(II) ACROSS STAND-ALONE CONDUCTING POLYPYRROLE MEMBRANES - THE EFFECT OF APPLIED POTENTIAL WAVE-FORMS
Publisher: Elsevier BV
Date: 1993
Composite Yttrium-Carbonaceous Spheres Templated Multi-Shell YVO4 Hollow Spheres with Superior Upconversion Photoluminescence
Publisher: Wiley
Date: 23-12-2017
Abstract: Complex oxide YVO
Air-processed depleted bulk heterojunction solar cells based on PbS/CdS core–shell quantum dots and TiO2 nanorod arrays
Publisher: Elsevier BV
Date: 05-2014
Ultrathin Transition Metal Dichalcogenide/3d Metal Hydroxide Hybridized Nanosheets to Enhance Hydrogen Evolution Activity
Publisher: Wiley
Date: 21-05-2018
Epitaxial growth of hyperbranched Cu/Cu2O/CuO core-shell nanowire heterostructures for lithium-ion batteries
Publisher: Springer Science and Business Media LLC
Date: 08-2015
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