ORCID Profile
0000-0003-3014-3478
Current Organisations
Sonic Essentials Pty Ltd
,
Micronisers Australasia Pty Ltd
,
Monash 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)
Materials Engineering Not Elsewhere Classified | Nanotechnology | Organic Chemical Synthesis | Condensed Matter Physics | Crop and Pasture Production | Manufacturing Engineering Not Elsewhere Classified | Environmental Engineering | Environmental Technologies | Nanomaterials | Geotechnical Engineering | Nanotechnology | Interdisciplinary Engineering Not Elsewhere Classified | Crop and Pasture Nutrition | Materials Engineering | Physical Sciences Not Elsewhere Classified | Condensed Matter Physics—Other
ANZSRC Socio-Economic Objective (SEO)
Other | Manufactured products not elsewhere classified | Wheat | Chemical Fertilisers | Industrial/degraded areas | Integrated circuits and devices | First stage treatment of ores and minerals | Other | Communication equipment not elsewhere classified | Machinery and equipment not elsewhere classified |
Related Links
Publications
Probing the microporous nature of hierarchically templated mesoporous silica via positron annihilation spectroscopy
Publisher: Elsevier BV
Date: 07-2006
Hydrocracking and isomerization of n-octane and 2,2,4-trimethylpentane over a platinum/alumina-pillared clay
Publisher: Elsevier BV
Date: 1991
Longitudinal assessment of the effects of field-hockey training on repeated sprint ability
Publisher: Elsevier BV
Date: 09-2004
DOI: 10.1016/S1440-2440(04)80027-6
Abstract: Repeated-sprint ability is thought to be an important fitness component of team sports. However, little is known about the effect sport-specific training has on this fitness component. Therefore, the purpose of this study was to investigate the effects of field-hockey specific training on repeated-sprint ability, plasma hypoxanthine (Hx) concentration and other blood parameters in 18 elite female field-hockey players. All subjects performed a repeated-sprint ability test on a cycle ergometer (5 x 6-sec maximal sprints every 30 secs) before and after seven weeks of training, designed to improve repeated-sprint ability. Following training, there was a significant (P< 0.05) increase in absolute total work (20.73+/-2.00 to 21.15+/-2.07 kJ, mean+/-SD). However, there was no significant change in total work when expressed per kg of body mass (341.3+/-16.4 to 345.5+/-18.8 J x kg(-1)). In addition, training resulted in a significant (P< 0.05) decrease in change values (peak-rest values) for Hx (8.2+/-3.8 to 5.5+/-2.7 micromol x L(-1)) and hydrogen ion concentration (22.8+/-5.2 to 19.1+/-5.1 nmol x L(-1)). The significant increase in absolute total work following seven weeks of field-hockey specific training was most likely due to an increase in lean muscle mass. The significant decrease in plasma Hx concentration (post-test minus rest values) following seven weeks of field hockey-specific training provides evidence that Hx production and/or efflux from the muscle are reduced. Therefore, one adaptation of sport-specific repeated-sprint training may be to conserve the purine nucleotide pool.
Heterobimetallic methylenebis(diphenylphosphine) complexes. Synthesis, structure and reactions of a mixed palladium-manganese system
Publisher: Elsevier BV
Date: 1983
Supported ruthenium nanoparticles on polyorganophosphazenes: preparation, structural and catalytic studies
Publisher: Elsevier BV
Date: 08-2003
Zinc monoglycerolate as a catalyst for the conversion of 1,3- and higher diols to diurethanes
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA05032D
Abstract: An efficient approach to the synthesis of diurethanes from 1,3- and higher diols ( n ≥ 3) is described.
Reversible Double Deprotonation of Hexamethylbenzene on Ruthenium: Formation of a Fluxional η3‐Benzyl Compound by Protonation of an o‐Quinodimethane Complex of Ruthenium(0)
Publisher: Wiley
Date: 05-1982
Independent cytotoxic and inflammatory responses to zinc oxide nanoparticles in human monocytes and macrophages
Publisher: Informa UK Limited
Date: 17-11-2012
DOI: 10.3109/17435390.2011.620718
Abstract: Significant public and scientific concerns remain for the use of nanoparticles (NPs) in commercial products, particularly those applied topically for skin care. There are currently a range of metal oxides formulated into many sunscreens that are present at the nanoscale. In this study, we sought to determine the effect of the size and dispersion of one type of these NPs (zinc oxide) on immune cell function and cytotoxicity for human macrophages and monocytes, which are key cells for particle and debris clearance in the skin. We have found that particle size and coating, but surprisingly, not agglomeration, are key determinates of nanoparticle cytotoxicity in an in vitro culture system of human immune cells. Most importantly, we found that this nanoparticle-induced cellular immune signalling, can be decoupled from cytotoxicity and surface coating, so that at an equivalent cytotoxic load, smaller particles induce a greater cellular response.
Potential hydraulic barrier performance of cyclic organic carbonate modified bentonite complexes against hyper-salinity
Publisher: Elsevier BV
Date: 10-2016
Characterizing the inhibitory action of zinc oxide nanoparticles on allergic-type mast cell activation
Publisher: Elsevier BV
Date: 08-2015
DOI: 10.1016/J.MOLIMM.2015.02.021
Abstract: The development of nanoparticles (NPs) for commercial products is undergoing a dramatic expansion. Many sunscreens and cosmetics now use zinc oxide (ZnO) or titania (TiO2) NPs, which are effective ultraviolet (UV) filters. Zinc oxide topical creams are also used in mild anti-inflammatory treatments. In this study we evaluated the effect of size and dispersion state of ZnO and TiO2 NPs, compared to "bulk" ZnO, on mast cell degranulation and viability. ZnO and TiO2 NPs were characterized using dynamic light scattering and disc centrifugation. Rat basophilic leukaemia (RBL-2H3) cells and primary mouse bone marrow-derived mast cells (BMMCs) were exposed to ZnO and TiO2 NPs of different sizes (25-200 nm) and surface coatings at concentrations from 1 to 200 μg/mL. The effect of NPs on immunoglobulin E (IgE)-dependent mast cell degranulation was assessed by measuring release of both β-hexosaminidase and histamine via colorimetric and ELISA assays. The intracellular level of Zn(2+) and Ca(2+) ions were measured using zinquin ethyl ester and Fluo-4 AM fluorescence probes, respectively. Cellular viability was determined using the soluble tetrazolium-based MTS colorimetric assay. Exposure of RBL-2H3 and primary mouse BMMC to ZnO NPs markedly inhibited both histamine and β-hexosaminidase release. This effect was both particle size and dispersion dependent. In contrast, TiO2 NPs did not inhibit the allergic response. These effects were independent of cytotoxicity, which was observed only at high concentrations of ZnO NPs, and was not observed for TiO2 NPs. The inhibitory effects of ZnO NPs on mast cells were inversely proportional to particle size and dispersion status, and thus these NPs may have greater potential than "bulk" zinc in the inhibition of allergic responses.
An XPS and TPR study of the reduction of promoted cobalt-kieselguhr Fischer-Tropsch catalysts
Publisher: Elsevier BV
Date: 02-1986
Surface area control during the synthesis and reduction of high area ceria catalyst supports
Publisher: Elsevier BV
Date: 1996
Double Deprotonation of Ruthenium(II) Cations Containing 1,2-Dimethyl-Substituted η6-Arenes. Protonation of the Resulting Exo-Coordinated (o-Xylylene)ruthenium(0) Complexes and X-ray Crystal Structures of the Agostic (η3-Pentamethylbenzyl)ruthenium(II) Complexes [Ru{η3-(HCH2)(CH2)C6Me4}{(Z)-Ph2PCH=CHPPh2}(PMe2Ph)]PF6 and [Ru{η3-(HCH2)(CH2)C6Me4}(PMe2Ph)3]PF6
Publisher: American Chemical Society (ACS)
Date: 09-1992
DOI: 10.1021/OM00045A022
Dinuclear arene hydrido-complexes of ruthenium(II): Reactions with olefins and catalysis of homogeneous hydrogenation of arenes
Publisher: Royal Society of Chemistry (RSC)
Date: 1979
DOI: 10.1039/C39790000312
Synthesis, molecular structure, and dynamic behaviour in solution of octakis(t-butyl isocyanide)dicobalt
Publisher: Royal Society of Chemistry (RSC)
Date: 1980
DOI: 10.1039/DT9800000080
Complexation of Cu(II) and Ni(II) by nitrilotriacetate intercalated in Zn-Cr layered double hydroxides
Publisher: Royal Society of Chemistry (RSC)
Date: 2000
DOI: 10.1039/A909902F
Reactions of coal liquids with cross-linked smectite catalysts. 1. Effects of pillaring materials and recycling
Publisher: Elsevier BV
Date: 06-1990
Progress towards preparation of high-surface-area rare-earth oxides
Publisher: Royal Society of Chemistry (RSC)
Date: 1991
DOI: 10.1039/JM9910100423
Synthetic opal as two-dimensional and three-dimensional nanotemplates
Publisher: CSIRO Publishing
Date: 2001
DOI: 10.1071/CH01138
Abstract: Manuscript received: 3 October 2001. Final version: 7 January 2002.
Shape selective cracking of n-octane and 2,2,4-trimethylpentane over an alumina-pillared clay
Publisher: Springer Science and Business Media LLC
Date: 03-1994
DOI: 10.1007/BF00812143
A Molecular Composite between Partially Hydrolyzed Aluminum Cations and a Layered Calcium Niobate Perovskite
Publisher: American Chemical Society (ACS)
Date: 09-1991
DOI: 10.1021/CM00017A038
Selective, low-temperature synthesis of niobium carbide and a mixed (niobium/tungsten) carbide from metal oxide-polyacrylonitrile composites by carbothermal reduction
Publisher: Springer Science and Business Media LLC
Date: 12-1993
DOI: 10.1007/BF00356411
Preparation and Fluxional Behavior of New Rhodiacyclopentadiene Complexes Containing Trifluorophosphine
Publisher: American Chemical Society (ACS)
Date: 1976
DOI: 10.1021/IC50155A022
Correlated Intermolecular and Intramolecular Ligand Exchange in μ-Acetylene-bis(ligand)tetrakis(trifluorophosphine)dirhodium Complexes and the Crystal and Molecular Structure of the Diphenylacetylene-Triphenylphosphine Derivative Rh2(PF3)4[P(C6H5)3]2(C6H5C2C6H5)·(C2H5)2O
Publisher: American Chemical Society (ACS)
Date: 1976
DOI: 10.1021/IC50155A021
Morphology and Pore Structure of Rare Earth Oxides
Publisher: CSIRO Publishing
Date: 1991
DOI: 10.1071/CH9910645
Abstract: The morphology observed by transmission electron microscopy of rare earth oxides, prepared by two different routes, has been related to adsorption characteristics for nitrogen at 77 K. The most common morphology was that of thin sheets, then small equiaxed particles, and, more rarely, rod-like particles. The presence of small equiaxed particles was found to be a prerequisite for adsorption hysteresis. Evaluation of linear 't' plots indicated freedom from micropores in all s les, but positive deviations in the presence of sheet morphology at high relative pressures left open the possibility of wedge-like pores in these s les.
Intramolecular and Intermolecular Ligand Exchange in Trifluorophosphinerhodium Complexes of Di-tert-butylacetylene. Rotation of Trifluorophosphine Groups about a Rhodium-Rhodium Double Bond
Publisher: American Chemical Society (ACS)
Date: 1976
DOI: 10.1021/IC50155A023
Reactions of Benzyl Compounds with Synthesis Gas in the Presence of Ruthenium Carbonyl Iodides
Publisher: CSIRO Publishing
Date: 1982
DOI: 10.1071/CH9821599
Abstract: Benzyl compounds, PhCH2X (X = OH, OCH2Ph, OMe, OAc), react with CO/H2 mixtures at 9-10 MPa and 220�C in the presence of aqueous HI and [RU(CO)3I2]2 to afford toluene, HX and polymers of the type H(C7H6)nH(n = 2-6). The mechanism involves the initial dehydration of PhCH2OH to (PhCH2)2O which disproportionates to toluene and benzaldehyde. Ruthenium, present mainly as [Ru(CO)3I3]- and cis-Ru(CO)4I2, catalyses reduction of benzaldehyde back to benzyl alcohol or the production of polymers. The significance of these results to toluene formation in benzyl alcohol homologation reactions is discussed.
Preparation and Fluxional Behavior of μ-Acetylene-Hexakis(trifluorophosphine)Dirhodium Complexes
Publisher: American Chemical Society (ACS)
Date: 1976
DOI: 10.1021/IC50155A020
Reaction of bis(cyclo-octa-1,5-diene)iron with trimethyl phosphite, phosphorus trifluoride, t-butyl isocyanide, carbon monoxide, and bis-1,2-(diphenylphosphino)ethane; the synthesis of [Fe(N2 )(diphos) 2 ]
Publisher: Royal Society of Chemistry (RSC)
Date: 1976
DOI: 10.1039/C3976000270B
Ru-doped phosphazene membrane materials used for catalytic hydrogenation
Publisher: Elsevier BV
Date: 09-2002
Isolation of a co-ordinated ketol intermediate in the hydrolysis of PF 6- initiated by the labile cations [Ru(η6- arene)(acetone)3]2+; X-ray crystal structure of acetone(4-hydroxy-4-methylpentan-2-one)(η6-mesitylene)ruthenium bistetrafluoroborate
Publisher: Royal Society of Chemistry (RSC)
Date: 1979
DOI: 10.1039/C39790000032
Light olefins from synthesis gas using ruthenium on rare earth oxide catalysts
Publisher: Elsevier
Date: 1988
Cobalt-catalysed reactions of methoxysilanes with CO/HSiEt3: a reaction analogous to methanol homologation
Publisher: Elsevier BV
Date: 02-1987
Metal Atom Synthesis of Organometallic Compounds
Publisher: Elsevier
Date: 1977
Formation of glycerol carbonate from glycerol and urea catalysed by metal monoglycerolates
Publisher: Royal Society of Chemistry (RSC)
Date: 2013
DOI: 10.1039/C3GC37028C
Reversible Double Deprotonation of Hexamethylbenzene on Ruthenium
Publisher: Wiley
Date: 1982
Developing design rules for fabricating microdevices with an integrated micro-sorption pump for vacuum generation: A theoretical study
Publisher: IOP Publishing
Date: 14-11-2005
Comparison of UVA-induced ROS and sunscreen nanoparticle-generated ROS in human immune cells
Publisher: Springer Science and Business Media LLC
Date: 05-2014
DOI: 10.1039/C3PP50428J
Abstract: Oxidative damage to cells and tissues from free radicals induced by ultraviolet (UV) irradiation can be attenuated by sunscreen components, such as ZnO and TiO2 nanoparticles (NPs). Although it is known that reactive oxygen species (ROS) are generated by cells upon exposure to ZnO and TiO2 NPs, it is unknown to what extent the amount generated is altered with UV co-exposure. As it is a critical component for determining the relative risk of these NPs when used in sunscreen formulations, we have investigated ROS generation by these NPs in human THP-1 monocyte immune cells following UVA co-exposure. Whilst the applied UVA dose (6.7 J cm(-2)) did not alter cell viability after 24 h, it induced significant ROS production - causing a 7-fold increase in intracellular peroxide and 3.3-fold increase in mitochondrial superoxide levels after 1 h. However, co-exposure to NPs and UVA generated the same or less ROS than with UVA exposure alone, with the exception of anatase TiO2, which showed significantly increased levels. These findings indicate that ROS generation from nanosunscreens is, in most cases, an insignificant contributor to the overall risk associated with oxidative stress from UVA exposure itself.
Hydrothermal synthesis and characterization of cobalt clays.
Publisher: Springer Science and Business Media LLC
Date: 1986
Characterization of Supported Ruthenium Catalysts Derived from Reaction of Ru3(CO)12with Rare Earth Oxides
Publisher: Elsevier BV
Date: 08-1998
Nanostructured ruthenium on γ-Al2O3 catalysts for the efficient hydrogenation of aromatic compounds
Publisher: Elsevier BV
Date: 02-2004
The preparation of palladium-olefin complexes from palladium vapour
Publisher: Royal Society of Chemistry (RSC)
Date: 1975
DOI: 10.1039/C3975000764A
Thermally Stable Aluminas for High Temperature Applications
Publisher: The Chemical Society of Japan
Date: 08-1998
DOI: 10.1246/CL.1998.793
The formation of β′-sialon from a montmorillonite-polyacrylonitrile composite by carbothermal reduction: an NMR, TGA, XRD and EM study
Publisher: Springer Science and Business Media LLC
Date: 1991
DOI: 10.1007/BF00544651
Cyclic carbonate-sodium smectite intercalates
Publisher: Elsevier BV
Date: 05-2016
Degradation studies of polyolefins incorporating transparent nanoparticulate zinc oxide UV stabilizers
Publisher: Springer Science and Business Media LLC
Date: 2002
Synthesis and structure of tochilinite
Publisher: Elsevier BV
Date: 1994
Synthetic opal as a template for nanostructured materials
Publisher: SPIE
Date: 06-04-2001
DOI: 10.1117/12.424412
Fate of Zinc Oxide Nanoparticles during Anaerobic Digestion of Wastewater and Post-Treatment Processing of Sewage Sludge
Publisher: American Chemical Society (ACS)
Date: 30-07-2012
DOI: 10.1021/ES301487S
Abstract: The rapid development and commercialization of nanomaterials will inevitably result in the release of nanoparticles (NPs) to the environment. As NPs often exhibit physical and chemical properties significantly different from those of their molecular or macrosize analogs, concern has been growing regarding their fate and toxicity in environmental compartments. The wastewater-sewage sludge pathway has been identified as a key release pathway leading to environmental exposure to NPs. In this study, we investigated the chemical transformation of two ZnO-NPs and one hydrophobic ZnO-NP commercial formulation (used in personal care products), during anaerobic digestion of wastewater. Changes in Zn speciation as a result of postprocessing of the sewage sludge, mimicking composting/stockpiling, were also assessed. The results indicated that "native" Zn and Zn added either as a soluble salt or as NPs was rapidly converted to sulfides in all treatments. The hydrophobicity of the commercial formulation retarded the conversion of ZnO-NP. However, at the end of the anaerobic digestion process and after postprocessing of the sewage sludge (which caused a significant change in Zn speciation), the speciation of Zn was similar across all treatments. This indicates that, at least for the material tested, the risk assessment of ZnO-NP through this exposure pathway can rely on the significant knowledge already available in regard to other "conventional" forms of Zn present in sewage sludge.
Contaminant effects on the photo-oxidation of greywater over titania film catalysts
Publisher: Elsevier BV
Date: 09-2015
23Na and 27Al NMR study of the products from carbonation of a Bayer liquor
Publisher: Royal Society of Chemistry (RSC)
Date: 1995
DOI: 10.1039/JM9950500521
Reducing ZnO nanoparticle cytotoxicity by surface modification
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4NR00458B
Abstract: ZnO surface properties control cytotoxicity by regulating nanoparticle uptake rather than by altering either intracellular or extracellular Zn dissolution rates.
Formation of Zinc-Containing Nanoparticles from Zn2+ Ions in Cell Culture Media: Implications for the Nanotoxicology of ZnO
Publisher: American Chemical Society (ACS)
Date: 27-09-2012
DOI: 10.1021/TX300241Q
Abstract: Zinc ions generate a range of poorly soluble Zn-containing nanoparticles when added to commonly used mammalian cell culture media. The formation of these nanoparticles confounds the use of soluble Zn salts as positive controls during cytotoxicity testing of other Zn-containing nanoparticles, such as ZnO. These nanoprecipitates can either be crystalline or amorphous and vary in composition depending upon the concentration of Zn(II) within the medium. The cytotoxicity and immune system response of these nanoparticles in situ are similar to those of 30 nm ZnO nanoparticles. The low residual level of truly soluble Zn species (taken as species passing through a 2 kDa membrane) in cell culture media with serum is insufficient to elicit any appreciable cytotoxicity. These observations highlight the importance of employing appropriate controls when studying ZnO nanoparticle toxicity and suggest a re-evaluation of the conclusions drawn in some previous cytotoxicity studies.
Managing Medical Advice Seeking in Calls to Child Health Line
Publisher: Wiley
Date: 23-04-2010
Nucleation of isotactic polypropylene with metal monoglycerolates
Publisher: Elsevier BV
Date: 02-2015
Preparation and crystal structure of fluorophosphinerhodium(I) complexes
Publisher: Royal Society of Chemistry (RSC)
Date: 1971
DOI: 10.1039/C29710000762
Some iron(III) complexes with polydentate Schiff base ligands
Publisher: Elsevier BV
Date: 07-1988
ZnO nanoparticles and organic chemical UV-filters are equally well tolerated by human immune cells
Publisher: Informa UK Limited
Date: 19-07-2016
DOI: 10.1080/17435390.2016.1206148
Abstract: An important part of assessing the toxic potential of nanoparticles for specific applications should be the direct comparison of biological activities with those of alternative materials for the same application. Nanoparticulate inorganic ultraviolet (UV) filters, such as zinc oxide (ZnO), are commonly incorporated into transparent sunscreen and cosmetic formulations. However, concerns have been raised about potential unwanted effects, despite their negligible skin penetration and inherent advantages over organic chemical UV-filters. To provide useful application-relevant assessments of their potential hazard with/without UVA co-exposure, we directly compared cytotoxic and immune response profiles of human THP-1 monocytic cells to ZnO nanoparticles (30 nm) with bulk ZnO particulates (200 nm) and five conventional organic chemical UV-filters - butylmethoxydibenzoylmethane (avobenzone), octylmethoxycinnamate, octylsalicylate, homosalate and 4-methylbenzylidene c hor. High exposure concentrations of both organic and particulate UV-filters were required to cause cytotoxicity in monocyte and macrophage cultures after 24 h. Co-exposure with UVA (6.7 J/cm(2)) did not alter cytotoxicity profiles. Particle surface area-based dose responses showed that ZnO NPs were better tolerated than bulk ZnO. Organic and particulate UV-filters increased apoptosis at similar doses. Only particulates increased the generation of reactive oxygen species. Interleukin-8 (IL-8) release was increased by all particulates, avobenzone, homosalate and octylsalicylate. IL-1β release was only increased in macrophages by exposure to avobenzone and homosalate. In conclusion, direct effects were caused in monocytes and macrophages at similar concentrations of both organic UV-filters and ZnO nanoparticulates - indicating that their intrinsic cytotoxicity is similar. With their lower skin penetration, ZnO nanoparticles are expected to have lower bioactivity when used in sunscreens.
Incorporation of dopants into the lattice of ZnO nanoparticles to control photoactivity
Publisher: Elsevier BV
Date: 2006
Synthesis and reactions of octakis(t-butyl isocyanide)dicobalt and pentakis(t-butyl isocyanide)ruthenium; X-ray crystal and molecular structures of [Co2(ButNC)8] and [Ru(Ph3P)(Bu tNC)4]
Publisher: Royal Society of Chemistry (RSC)
Date: 1977
DOI: 10.1039/C39770000256
Synthesis and reactions of heterobimetallic magnanese-palladium complexes. Crystal and molecular structure of [mnPdBr(CO)3-(μ-Ph2PCH2PPh2) 2]
Publisher: Royal Society of Chemistry (RSC)
Date: 1984
DOI: 10.1039/DT9840001831
2D Nanomaterials Incorporated Poly(vinylidene fluoride) Nanocomposites: Morphology, Crystalline Structure, and Dielectric, Ferroelectric, and Piezoelectric Properties
Publisher: American Chemical Society (ACS)
Date: 28-03-2023
Stabiliser distribution and efficiency examined by depth profiling polypropylene using a positron beam
Publisher: Elsevier BV
Date: 12-2007
Reactions of co-ordinated ligands. Part 15. The cycloaddition of electronegatively substituted unsaturated systems to tricarbonyl(η-N-methoxycarbonyl-1H-azepine)-iron and -ruthenium and tricarbonyl(η-cyclohepta-2,4,6-trien-1-one)iron
Publisher: Royal Society of Chemistry (RSC)
Date: 1977
DOI: 10.1039/DT9770000204
Stereochemically Nonrigid Binuclear Acetylene Complexes of Rhodium
Publisher: American Chemical Society (ACS)
Date: 09-1972
DOI: 10.1021/JA00773A046
Lanthanum cobalt oxide oxidation catalysts derived from mixed hydroxide precursors
Publisher: Elsevier BV
Date: 10-1990
Porous 45S5 Bioglass®-based scaffolds using stereolithography: Effect of partial pre-sintering on structural and mechanical properties of scaffolds
Publisher: Elsevier BV
Date: 06-2017
DOI: 10.1016/J.MSEC.2017.03.001
Abstract: Scaffolds made from 45S5 Bioglass® ceramic (BG) show clinical potential in bone regeneration due to their excellent bioactivity and ability to bond to natural bone tissue. However, porous BG scaffolds are limited by their mechanical integrity and by the substantial volume contractions occurring upon sintering. This study examines stereolithographic (SLA) methods to fabricate mechanically robust and porous Bioglass®-based ceramic scaffolds, with regular and interconnected pore networks and using various computer-aided design architectures. It was found that a diamond-like (DM) architecture gave scaffolds the most controllable results without any observable closed porosity in the fired scaffolds. When the pore dimensions of the DM scaffolds of the same porosity (~60vol%) were decreased from 700 to 400μm, the compressive strength values increased from 3.5 to 6.7MPa. In addition, smaller dimensional shrinkage could be obtained by employing partially pre-sintered bioglass, compared to standard 45S5 Bioglass®. Scaffolds derived from pre-sintered bioglass also showed marginally improved compressive strength.
Reactions of transition-metal vapours with cycloheptatriene and cyclo-octatetraene
Publisher: Royal Society of Chemistry (RSC)
Date: 1976
DOI: 10.1039/DT9760002021
An XPS study of Ru-promotion for Co/CeO2 Fischer-Tropsch catalyst
Publisher: Elsevier BV
Date: 09-1993
Micropore Characterization of Mesocellular Foam and Hybrid Organic Functional Mesocellular Foam Materials
Publisher: American Chemical Society (ACS)
Date: 12-2009
DOI: 10.1021/JP904495E
Hydrogenation of CO over a Ru-promoted Cobalt/Cerium Oxide Catalyst
Publisher: Elsevier
Date: 1994
Ruthenium promotion of fischer-tropsch synthesis over coprecipitated cobalt/ceria catalysts
Publisher: Elsevier BV
Date: 07-1993
Towards sustainable facilities management
Publisher: Spon Press
Date: 09-02-2009
Addition of small molecules to Mn2(CO)5(Ph2PCH2PPh2)2 including the isolation of a diazomethane adduct
Publisher: Elsevier BV
Date: 1982
Relating Cytotoxicity, Zinc Ions, and Reactive Oxygen in ZnO Nanoparticle–Exposed Human Immune Cells
Publisher: Oxford University Press (OUP)
Date: 31-08-2013
Abstract: Although zinc oxide (ZnO) nanoparticles (NPs) have been widely formulated in sunscreens, the relationship between reactive oxygen species (ROS) generation induced by these particles, zinc ions, and cytotoxicity is not clearly understood. This study explores whether these factors can be accurately quantified and related. The study demonstrates a strong correlation between ZnO NP-induced cytotoxicity and free intracellular zinc concentration (R (2) = .945) in human immune cells, indicating a requirement for NP dissolution to precede cytotoxicity. In addition, although direct exposure to ZnO NPs was found to induce cytotoxicity at relatively high concentrations, indirect exposure (via dialysis) was not cytotoxic, even at extremely high concentrations, highlighting a requirement for NP-to-cell contact. Elevated levels of ROS present in NP-exposed cells also correlated to both cytotoxicity and intracellular free zinc. Although the addition of antioxidant was able to reduce ROS, cytotoxicity to ZnO NPs was unaffected, suggesting ROS may be, in part, a result of cytotoxicity rather than a causal factor. This study highlights both the requirement and role of intracellular dissolution of zinc nanomaterials to elicit a cytotoxic response. This response is only partially ROS dependent, and therefore, modification of NP uptake and their intracellular solubility are key components in modulating the bioactivity of ZnO NPs.
Reaction of triruthenium dodecacarbonyl with high-area rare earth oxides
Publisher: Elsevier BV
Date: 1997
Synthesis and structure of valleriite, a layered metal hydroxide/sulfide composite
Publisher: Elsevier BV
Date: 06-1993
Uptake of zinc and phosphorus by plants is affected by zinc fertiliser material and arbuscular mycorrhizas
Publisher: Springer Science and Business Media LLC
Date: 20-11-2014
Dialkylaminofluorophosphine complexes of rhodium(I)
Publisher: CSIRO Publishing
Date: 1973
DOI: 10.1071/CH9732335
Abstract: Diethylaminodifluorophosphine, PF2NEt2, forms dimeric, halogen-bridged rhodium(1) complexes [RhX(PF2NEt2)2]2 (X = C1 or I) which react reversibly with an excess of the ligand to give non-ionic, five-coordinate complexes RhX(PF2NEt2)4. Dimethylaminodifluorophosphine, PF2NMe2, forms analogous complexes but, in contrast with diethylaminodifluorophosphine, the complex RhC1(PF2NMe2), decom- poses thermally to give initially an isolable tris complex RhC1(PF2NMe2),, which has no known counterpart in CO or PF, chemistry. The tris-complex decomposes thermally to give [RhC1(PF2NMe2),l2. Bis(dimethylamino)fluorophosphine, PF(NMe& , forms a tris complex, RhCl{PF(NMe2)2)3, but a dimeric bis-ligand complex could not be isolated. In contrast with tertiary phosphines and phosphites, the fluorophosphines do not form ionic rhodium(1) species. Monomeric derivatives such as R ~ ( ~ C ~ C ) ( P F ~ N E ~ ~ ) ~ , Rh(C5H5)(PF2NEt2)2, RhC1(PF2NEt2)(PPh3), and RhC1(PPh3)(PF2NEt2)2 have been prepared. The complexes [RhCl(CO)2]2 and [RhC1(PF2NEt2)2] undergo ligand redistribution on mixing, the product consisting mainly of [RhC1(CO)(PF2NEt2)]2. 19F n.m.r, data are reported and used inter aha to show that R ~ ( ~ C ~ C ) ( P F ~ N E ~ ~ ) ~ , but not Rh(C5H5)(PF2NEt2)2, exchanges rapidly with free PF2NEt2, and that, in RhC1- (PPh3)(PF2NEt2)2, the fluorophosphine ligands are mutually cis. Bands in the infrared arising from P-F vibrations are reported and discussed. The dialkylaminofluoro- phosphines appear to be poorer n-acceptors and/or better o-donors than PI?, but are better n-acceptors than phosphites.
An arene hydrido-complex of ruthenium(II) as catalyst for the homogeneous hydrogenation of benzene and olefins
Publisher: Royal Society of Chemistry (RSC)
Date: 1978
DOI: 10.1039/C39780000582
Cyclic organic carbonate modification of sodium bentonite for enhanced containment of hyper saline leachates
Publisher: Elsevier BV
Date: 12-2016
Formation and thermal decomposition of rare-earth carbonates
Publisher: Springer Science and Business Media LLC
Date: 1992
DOI: 10.1007/BF02403646
Light olefin production from CO/H2 over silica supported Fe/Mn/K catalysts derived from a bimetallic carbonyl anion, [Fe2Mn(CO)12]-
Publisher: Springer Science and Business Media LLC
Date: 03-1982
DOI: 10.1007/BF02063605
Quantification of ZnO Nanoparticle Uptake, Distribution, and Dissolution within Individual Human Macrophages
Publisher: American Chemical Society (ACS)
Date: 11-11-2013
DOI: 10.1021/NN403118U
Abstract: The usefulness of zinc oxide (ZnO) nanoparticles has led to their wide distribution in consumer products, despite only a limited understanding of how this nanomaterial behaves within biological systems. From a nanotoxicological viewpoint the interaction(s) of ZnO nanoparticles with cells of the immune system is of specific interest, as these nanostructures are readily phagocytosed. In this study, rapid scanning X-ray fluorescence microscopy was used to assay the number ZnO nanoparticles associated with ∼1000 in idual THP-1 monocyte-derived human macrophages. These data showed that nanoparticle-treated cells endured a 400% elevation in total Zn levels, 13-fold greater than the increase observed when incubated in the presence of an equitoxic concentration of ZnCl2. Even after excluding the contribution of internalized nanoparticles, Zn levels in nanoparticle treated cells were raised ∼200% above basal levels. As dissolution of ZnO nanoparticles is critical to their cytotoxic response, we utilized a strategy combining ion beam milling, X-ray fluorescence and scanning electron microscopy to directly probe the distribution and composition of ZnO nanoparticles throughout the cellular interior. This study demonstrated that correlative photon and ion beam imaging techniques can provide both high-resolution and statistically powerful information on the biology of metal oxide nanoparticles at the single-cell level. Our approach promises ready application to broader studies of phenomena at the interface of nanotechnology and biology.
A spectroscopic study of the coordination of dimethyl sulfoxide to a platinum (111) surface
Publisher: Elsevier BV
Date: 1983
Pendant cyclic carbonate‐polymer/Na‐smectite nanocomposites via in situ intercalative polymerization and solution intercalation
Publisher: Wiley
Date: 06-04-2016
DOI: 10.1002/POLA.28117
Effect of substrate on surface morphology and photocatalysis of large-scale TiO 2 films
Publisher: Elsevier BV
Date: 2013
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University Of Bristol
Location: United Kingdom of Great Britain and Northern Ireland
Related Funding Activities
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End Date: 2009
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View Funded ActivityARC Nanotechnology Research Network
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View Funded ActivitySpecial Research Initiatives - Grant ID: SR0354821
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