ORCID Profile
0000-0002-0760-4670
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Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Elsevier BV
Date: 11-2017
DOI: 10.1016/J.ACA.2017.08.049
Abstract: In this study, graphene grown on stainless steel mesh efficiently incorporates the advanced properties of graphene in the form of an ultra-thin coating with the open geometry of the substrate, resulting in a highly sensitive and fast sorptive device capable of extracting target analytes directly from s le matrices. The synthesis of graphene on the stainless steel mesh was confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The advantages of the new microextraction device have been investigated for the determination of polycyclic aromatic hydrocarbons (PAHs) in environmental water s les in combination with gas chromatography-flame ionization detector (GC-FID). The factors affecting the extraction efficiency such as stirring speed, extraction time, ionic strength and desorption conditions, were investigated and the optimal extraction conditions were established. Under the optimal extraction condition, linearity was in the range of 0.003-100 ng mL
Publisher: Springer Science and Business Media LLC
Date: 30-03-2017
Publisher: MDPI AG
Date: 09-11-2016
DOI: 10.3390/POLYM8110381
Publisher: Elsevier BV
Date: 07-2014
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA16330C
Abstract: A one-step process, the chemical vapor deposition method, has been used to fabricate graphene flakes (G) on branched carbon nanofibers (CNF) grown on carbon fibers (CF).
Publisher: Oxford University Press (OUP)
Date: 06-01-2023
DOI: 10.1093/CID/CIAD003
Abstract: Coronavirus disease 2019 (COVID-19) vaccination coverage remains lower in communities with higher social vulnerability. Factors such as severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) exposure risk and access to healthcare are often correlated with social vulnerability and may therefore contribute to a relationship between vulnerability and observed vaccine effectiveness (VE). Understanding whether these factors impact VE could contribute to our understanding of real-world VE. We used electronic health record data from 7 health systems to assess vaccination coverage among patients with medically attended COVID-19-like illness. We then used a test-negative design to assess VE for 2- and 3-dose messenger RNA (mRNA) adult (≥18 years) vaccine recipients across Social Vulnerability Index (SVI) quartiles. SVI rankings were determined by geocoding patient addresses to census tracts rankings were grouped into quartiles for analysis. In July 2021, primary series vaccination coverage was higher in the least vulnerable quartile than in the most vulnerable quartile (56% vs 36%, respectively). In February 2022, booster dose coverage among persons who had completed a primary series was higher in the least vulnerable quartile than in the most vulnerable quartile (43% vs 30%). VE among 2-dose and 3-dose recipients during the Delta and Omicron BA.1 periods of predominance was similar across SVI quartiles. COVID-19 vaccination coverage varied substantially by SVI. Differences in VE estimates by SVI were minimal across groups after adjusting for baseline patient factors. However, lower vaccination coverage among more socially vulnerable groups means that the burden of illness is still disproportionately borne by the most socially vulnerable populations.
Publisher: Trans Tech Publications, Ltd.
Date: 12-2015
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.1134.191
Abstract: Although the wide applications of the fractional order of dierential equations hasbeen reported in the physics, astronomy, and bioengineering elds, little attention has beenpaid to the fractional kinetic models in the literature. In this research, we are conned with theapplication of Jacobi polynomials for solving fractional order of l dierential equation arising inchemical reaction model into the Palm oil in the sense of fuzzy context. The results demonstratethe capability of the method which can be a reliable numerical technique to be utilized in thesimilar reaction models.
Publisher: Springer Science and Business Media LLC
Date: 14-07-2017
Publisher: Elsevier
Date: 2019
Publisher: Elsevier BV
Date: 09-2021
Publisher: Informa UK Limited
Date: 18-05-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA15607F
Abstract: In the current study, we investigated the influences of chemical vapor deposition parameters on the formation of uniform structures of few- and multi-layer graphene (FLG and MLG) as a coating phase on carbon fiber (CF).
Publisher: No publisher found
Date: 2021
Publisher: Springer Science and Business Media LLC
Date: 23-11-2017
Publisher: MDPI AG
Date: 04-10-2019
DOI: 10.3390/MA12193251
Abstract: The aim was to isolate cellulose nanocrystals (CNC) from commercialized oil palm empty fruit bunch cellulose nanofibre (CNF) through sulphuric acid hydrolysis and explore its safeness as a potential nanocarrier. Successful extraction of CNC was confirmed through a field emission scanning electron microscope (FESEM) and attenuated total reflection Fourier transmission infrared (ATR-FTIR) spectrometry analysis. For subsequent cellular uptake study, the spherical CNC was covalently tagged with fluorescein isothiocyanate (FITC), resulting in negative charged FITC-CNC nanospheres with a dispersity (Ð) of 0.371. MTT assay revealed low degree cytotoxicity for both CNC and FITC-CNC against C6 rat glioma and NIH3T3 normal fibroblasts up to 50 µg/mL. FITC conjugation had no contribution to the particle’s toxicity. Through confocal laser scanning microscope (CLSM), synthesized FITC-CNC manifested negligible cellular accumulation, indicating a poor non-selective adsorptive endocytosis into studied cells. Overall, an untargeted CNC-based nanosphere with less cytotoxicity that posed poor selectivity against normal and cancerous cells was successfully synthesized. It can be considered safe and suitable to be developed into targeted nanocarrier.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NJ00859J
Abstract: The proposed method offers advantages such as wide linearity, satisfactory relative recovery, good sensitivity and precision and short analysis time.
Publisher: MDPI AG
Date: 02-01-2016
DOI: 10.3390/NANO6010006
Publisher: Elsevier BV
Date: 09-2016
DOI: 10.1016/J.CHROMA.2016.08.034
Abstract: The application of magnetized graphene (G) layers synthesized on the carbon nanofibers (CNFs) (m-G/CNF) was investigated as novel adsorbent for the magnetic solid-phase extraction (MSPE) of polycyclic aromatic hydrocarbons (PAHs) in water s les followed by gas chromatography-flame ionization detector (GC-FID). Six important parameters, affecting the extraction efficiency of PAHs, including: amount of adsorbent, adsorption and desorption times, type and volume of the eluent solvent and salt content of the s le were evaluated. The optimum extraction conditions were obtained as: 5min for extraction time, 20mg for sorbent amount, dichloromethane as desorption solvent, 1mL for desorption solvent volume, 5min for desorption time and 15% (w/v) for NaCl concentration. Good performance data were obtained at the optimized conditions. The calibration curves were linear over the concentration ranges from 0.012 to 100ngmL(-1) with correlation coefficients (r) between 0.9950 and 0.9967 for all the analytes. The limits of detection (LODs, S/N=3) of the proposed method for the studied PAHs were 0.004-0.03ngmL(-1). The relative standard deviations (RSDs) for five replicates at two concentration levels (0.1 and 50ngmL(-1)) of PAHs were ranged from 3.4 to 5.7%. Appropriate relative recovery values, in the range of 95.5-99.9%, were also obtained for the real water s le analysis.
Publisher: Elsevier BV
Date: 12-2017
Publisher: Springer Science and Business Media LLC
Date: 30-10-2012
Publisher: Elsevier BV
Date: 10-2021
Publisher: Author(s)
Date: 2017
DOI: 10.1063/1.5010456
Publisher: Elsevier
Date: 2019
Publisher: Springer Science and Business Media LLC
Date: 16-11-2016
Publisher: IOP Publishing
Date: 10-2017
Publisher: Elsevier BV
Date: 08-2020
Publisher: Springer Science and Business Media LLC
Date: 10-03-2020
Publisher: Wiley
Date: 06-09-2020
DOI: 10.1111/OIK.07501
Publisher: Springer Science and Business Media LLC
Date: 02-2019
DOI: 10.1007/S00604-019-3246-7
Abstract: Different types of hybrid nanocomposites were prepared from a copper-based metal-organic framework (MOF-199) and graphene (Gr) or fullerene (Fl). The porosity and quality of the nanocomposites were studied by scanning electron microscopy, transmission electron microscopy and BET surface area analysis. The nanocomposites are shown to be viable sorbents for the dispersive micro solid phase extraction of polycyclic aromatic hydrocarbons (PAHs) from environmental water s les. This is due to (a) the presence of MOF-199 which leads to improved adsorption capacity, and (b) the presence of Gr or Fl on the surface of MOF-199 which enhances the interaction with PAHs. Specifically, acenaphthene, anthracene, benz[a]anthracene, fluorene, naphthalene, 2-methylnaphthalene, and pyrene were studied. A comparison of the sorbents shows MOF-199/Gr to possess the highest adsorption affinity and to be most durable, probably a result of the high porosity of graphene. Following desorption with acetonitrile, the PAHs were quantified by GC with FID detection. Under the optimum conditions, limits of detection (at an S/N ratio of 3) range from 3 to 10 pg mL
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2019
Publisher: Trans Tech Publications, Ltd.
Date: 12-2015
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.1134.209
Abstract: In the current work, the synthesis of carbon nanotubes (CNTs) and carbon nanospheres (CNS’s) has been investigated by applying the chemical vapor deposition method in a one-step s le preparation. In this method, iron nitrate non-hydrate (Fe(NO 3 ) 3 .9H 2 O) and acetylene (C 2 H 2 ) have been used as the catalyst source and carbon source, respectively, to grow CNT directly on the CF surface at 700°C and then CNS’s were synthesized on the CNT layers at 900°C under a 250sccm gas flow rate (40%N 2 , 40%H 2 , 20% C 2 H 2 ). According to the SEM and TEM micrographs from the resultant carbon nanoparticles, the diameters of the CNTs and CNS’s have been estimated about 30-50nm and 300-400nm, respectively.
Publisher: Informa UK Limited
Date: 19-11-2015
Publisher: Springer Science and Business Media LLC
Date: 25-05-2018
Publisher: Springer Science and Business Media LLC
Date: 12-10-2018
Publisher: Springer Science and Business Media LLC
Date: 20-04-2018
Publisher: Springer Science and Business Media LLC
Date: 28-11-2018
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Date: 2020
Publisher: Hindawi Limited
Date: 2013
DOI: 10.1155/2013/610314
Abstract: In view of the usefulness and a great importance of the kinetic equation in specific chemical engineering problems, we discuss the numerical solution of a simple fuzzy fractional kinetic equation applied for the hemicelluloses hydrolysis reaction. The fuzzy approximate solution is derived based on the Legendre polynomials to the fuzzy fractional equation calculus. Moreover, the complete error analysis is explained based on the application of fuzzy Caputo fractional derivative. The main advantage of the present method is its superior accuracy which is obtained by using a limited number of Legendre polynomials. The method is computationally interesting, and the numerical results demonstrate the effectiveness and validity of the method for solving fuzzy fractional differential equations.
Publisher: Springer Science and Business Media LLC
Date: 21-03-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA01928A
Abstract: The potential usage of different types of carbon nanomaterials such as carbon nanofiber (CNF), carbon nanotube (CNT) and graphene (G) flake and also CNF–G and CNT–G on the carbon fiber (CF) surface as fillers in composites, is discussed in this paper.
No related grants have been discovered for Ferial Ghaemi.