排序方式: 共有29条查询结果,搜索用时 15 毫秒
21.
Reena R. Patel Rajendran Mohanraj Charles U. Pittman 《Journal of Polymer Science.Polymer Physics》2006,44(1):234-248
Molecular dynamics simulations were carried out on copolymers of both styrene and methyl methacrylate with polyhedral oligomeric silsesquioxane (POSS) derivatives to identify the origin of the property changes imparted upon the chemical incorporation of POSS. Simulations were carried out on these hybrid copolymers and the parent homopolymers to elucidate the effect of the T8, T10, and T12 POSS cages. These POSS comonomers were derivatized with a single polymerizable function and 7, 9, and 11 nonpolymerizable hydrocarbon moieties, respectively. Glass transition temperatures (Tg) were computed from specific volume versus temperature plots. The packing of POSS units around the polymer backbone was analyzed via their radial distribution functions. The effect of POSS on polymer motion was analyzed through the mean square displacement function. The improvements in the elastic moduli upon incorporation of POSS were computed by employing the static deformation method. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 44: 234–248, 2006 相似文献
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Sundaresan Mohanraj Shanmugam Kodhaiyolii Mookan Rengasamy Velan Pugalenthi 《Applied biochemistry and biotechnology》2014,173(1):318-331
A green synthesis of iron oxide nanoparticles (FeNPs) was developed using Murraya koenigii leaf extract as reducing and stabilizing agent. UV–vis spectra show that the absorption band centred at a wavelength of 277 nm which corresponds to the surface plasmon resonances of synthesized FeNPs. Fourier transform infrared spectroscopy spectrum exhibits that the characteristic band at 580 cm?1 is assigned to Fe–O of γ-Fe2O3. Transmission electron microscopy image confirms that the spherical with irregular shaped aggregates and average size of nanoparticles was found to be ~59 nm. The effect of synthesized FeNPs on fermentative hydrogen production was evaluated from glucose by Clostridium acetobutylicum NCIM 2337. The hydrogen yield in control experiment was obtained as 1.74?±?0.08 mol H2/mol glucose whereas the highest hydrogen yield in FeNPs supplemented experiment was achieved as 2.33?±?0.09 mol H2/mol glucose at 175 mg/L of FeNPs. In addition, the hydrogen content and hydrogen production rate were also increased from 34?±?0.8 to 52?±?0.8 % and 23 to 25.3 mL/h, respectively. The effect of FeNPs was compared with supplementation of FeSO4 on fermentative process. The supplementation of FeNPs enhanced the hydrogen production in comparison with control and FeSO4. The supplementation of FeNPs led to the change of the metabolic pathway towards high hydrogen production due to the enhancement of ferredoxin activity. The fermentation type was shifted from butyrate to acetate/butyrate fermentation type at the addition of FeNPs. 相似文献
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Abirami Muthukannan Pasunkili Prema Johnson Henry Kannusamy Mohanraj Ganesan Sivakumar 《中国化学会会志》2016,63(10):841-846
CuBiSe2 (CBSe) thin film was prepared by vacuum evaporation. The deposited film was characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), energy dispersive X‐ray (EDX), UV–visible specroscopy, and I–V analysis. XRD analysis indicates the formation of cubic CBSe thin film, and the corresponding EDX spectrum confirms the stoichiometry composition of CBSe. In the AFM images, the majority of the particles are granular, and the surface roughness is 8.86 nm. The optical absorption coefficient is >104 in the visible region and the bandgap energy is calculated to be 1.84 eV. The photosensitivity of the film is 181%. 相似文献
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G. Karthikeyan K. Mohanraj K. P. Elango K. Girishkumar 《Russian Journal of Coordination Chemistry》2006,32(5):380-385
A series of nonelectrolytic lanthanide(III) complexes, [ML2Cl3]·2H2O, where M is lanthanum(III), praseodymium(III), neodymium(III), samarium(III), gadolinium(III), terbium(III), dysprosium(III),
and yttrium(III), containing sulfamethoxazole ligand (L) are prepared. The structure and bonding of the ligand are studied
by elemental analysis, magnetic susceptibility measurements, IR, 1HNMR, TG/DTA, X-ray diffraction studies, and electronic spectra of the complexes. The stereochemistry around the metal ions is a monocapped
trigonal prism in which four of the coordination sites are occupied by two each from two chelating ligands, sulfonyl oxygen,
and nitrogen of the amide group and the remaining three positions are occupied by three chlorines. The ligand and the new
complexes were tested in vitro to evaluate their activity against the bacteria Escherichia coli and Staphylococcus aureus.
The text was submitted by the authors in English. 相似文献
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Maruthachalam Mohanraj Ganesan Ayyannan Gunasekaran Raja Chinnasamy Jayabalakrishnan 《应用有机金属化学》2016,30(7):550-560
Three ruthenium(II) hydrazone complexes of composition [RuCl(CO)(PPh3)2L] were synthesized from the reactions of [RuHCl(CO)(PPh3)3] with hydrazones derived from 4‐methoxybenzhydrazide and 4‐formylbenzoic acid (HL1), 4‐methylbenzaldehyde (HL2) and 2‐bromobenzaldehyde (HL3). The synthesized hydrazone ligands and their metal complexes were characterized using elemental analysis and infrared, UV–visible, NMR (1H, 13C and 31P) and mass spectral techniques. The hydrazone ligands act as bidentate ones, with O and N as the donor sites, and are predominantly found in the enol form in all the complexes studied. The molecular structures of the ligands HL1, HL2 and HL3 were determined using single‐crystal X‐ray diffraction. The interactions of the ligands and the complexes with calf thymus DNA were studied using absorption spectroscopy and cyclic voltammetry which revealed that the compounds could interact with calf thymus DNA through intercalation. The DNA cleavage activity of the complexes was evaluated using a gel electrophoresis assay which revealed that the complexes act as good DNA cleavage agents. In addition, all the complexes were subjected to antioxidant assay, which showed that they all possess significant scavenging activity against 2,2‐diphenyl‐2‐picrylhydrazyl, OH and NO radicals. The in vitro cytotoxic effect of the complexes examined on cancerous cell lines (HeLa and MCF‐7) showed that the complexes exhibit substantial anticancer activity. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
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Journal of Thermal Analysis and Calorimetry - In this paper, the environment friendly refrigerant options suitable for automobile air conditioners are reviewed. Initially, the thermophysical,... 相似文献
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