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School of Studies in Chemistry
187
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School of Studies in Biochemistry
75
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  • [Show abstract] [Hide abstract]
    ABSTRACT: Organophosphates (OPs) pesticides are among the most toxic synthetic chemicals purposefully added in the environment. The common use of OP insecticides in public health and agriculture results in an environmental pollution and a number of acute and chronic poisoning events. Present study was aimed to evaluate the potential of monocrotophos and quinalphos to effect the redox status and glutathione (GSH) homeostasis in rat tissues and find out whether antioxidant vitamins have some protection on the pesticide-induced alterations. The results showed that these pesticides alone or in combination, caused decrease in the levels of GSH and the corresponding increase in the levels of GSSG, decreasing the GSH/GSSG ratio. The results also showed that NADPH/NADP(+) and NADH/NAD(+) ratios were decreased in the liver and brain of rats on exposure with mococrotophos, quinalphos, and their mixture. These pesticides, alone or in combination, caused alterations in the activities of GSH reductase and glucose-6-phosphate dehydrogenase in the rat tissues. However, the expression of the GSH recycling enzymes did not show significant alterations as compared to control. From the results, it can be concluded that these pesticides generate oxidative stress but their effects were not synergistic when given together and prior feeding of antioxidant vitamins tend to reduce the toxicities of these pesticides. © 2013 Wiley Periodicals, Inc. Environ Toxicol, 2013.
    Environmental Toxicology 04/2015; 30(4). DOI:10.1002/tox.21924
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    ABSTRACT: Experimental studies have shown that sulphur-containing antioxidants have beneficial effects against the detrimental properties of Pb. In the present study, we investigated the therapeutic potential of combined administration of N-acetyl cysteine (NAC; 50 mg/kg p.o.) and selenium (Se; 0.5 mg/kg p.o.) against lead acetate intoxication (Pb; 0.2% in water ad libitum) in a male rat model for 12 wk. The exposure of rats to lead acetate produced significant (P < 0.05) alterations in cytochrome P450 (CYP) activity, microsomal lipid peroxidation, reduced glutathione, and proteins. In addition, significant elevation in liver markers transaminases, triglycerides, cholesterol, and bilirubin as well as a decline in albumin were also compared with the experimental control rats. Combined treatment of lead-exposed animals with NAC and Se showed marked improvement of the biochemical, molecular, and histopathological findings. These experimental results strongly indicate the protective effect of NAC alone with Se against toxic effects of lead on liver tissue.
    Journal of Environmental Pathology Toxicology and Oncology 01/2015; 34(1):23-34. DOI:10.1615/JEnvironPatholToxicolOncol.2015012006
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    ABSTRACT: Electronic and magnetic properties of Ru2VGe and Ru2VSb have been calculated using full potential linearized augmented plane wane method. The optimized equilibrium lattice constants in stable Fm-3m configuration were found to be 6.032 Å for Ru2VGe and 6.272 Å for Ru2VSb. Spin-resolved calculations show that V mainly contributes to the magnetic properties in these materials. The materials follow the Slater–Pauling rule and hence have integral magnetic moments which is due to 100% spin polarization at Fermi energy. The calculated total magnetic moments per unit cell were found to be 1.0 µB for Ru2VGe and 2.0 µB for Ru2VSb. Both the materials having ferromagnetic ground state, exhibit half-metallicity with an energy gap in the spin-down channel of 0.095 eV for Ru2VGe and 0.186 eV for Ru2VSb.
    Journal of Magnetism and Magnetic Materials 08/2014; DOI:10.1016/j.jmmm.2014.08.032

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    Gwalior, India
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Current Medicinal Chemistry 08/2010; 17(22):2419-30. DOI:10.2174/092986710791698495
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