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81.
Udai P. Singh Rajender Singh Shiro Hikichi Munetaka Akita Yoshihiko Moro-oka 《Inorganica chimica acta》2000,310(2):11664-278
A dinuclear Mn(II) di(μ-hydroxo) complex having hydrotris(3,5-diisopropyl-1-pyrazolyl)borate (=TpiPr2) reacted with benzoic acid to yield a dinuclear Mn(II) tri(μ-carboxylato) complex, TpiPr2Mn-(μ-OBz)3-Mn(TpiPr2H). X-ray crystallography reveals the unsymmetrical coordination environments for the manganese centers. One of the two TpiPr2 ligands, which bound to the five-coordinated Mn center, is protonated by the action of the third carboxylic acid and the resulting non-Mn-binding N–H moiety forms an intramolecular hydrogen bond with the oxygen donor of a carboxylate ligand. Steric congestion in the bimetallic core results in the large separation of the manganese centers bridged by the syn-anti carboxylate ligand. 相似文献
82.
83.
Rajender Singh Umesh Goutam R. K. Gupta G. C. Pandey Jag Shoran Ratan Tiwari 《Journal of genetics》2009,88(3):325-329
84.
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86.
Narra MR Begum G Rajender K Rao JV 《Zeitschrift für Naturforschung. C, Journal of biosciences》2011,66(9-10):507-514
In vivo toxicity of monocrotophos on key metabolites and enzymes of the protein metabolism was investigated in important tissues of the freshwater fish Clarias batrachus. Fish were exposed to 1/10 and 1/20 of LC50 concentration for 28 days. After 28 days of exposure, some fish were transferred to monocrotophos-free water and kept in the same for 21 days (recovery period) in order to study the recovery response. Total protein, amino acid, and ammonia contents were decreased in gill, kidney, liver, and muscle tissues, and recovery was slight at the end of 21 days of transfer of fish into freshwater. Urea and glutamine levels were elevated, except in kidneys, and recovered at the end of the recovery period. The activities of protease, transaminase, and phosphatase enzymes were elevated in all tissues during 28 days of exposure and at both concentrations. Recovery of the activity of enzymes was more significant at the lower concentration as compared to the higher concentration. 相似文献
87.
Removal of sulphate, COD and Cr(VI) in simulated and real wastewater by sulphate reducing bacteria enrichment in small bioreactor and FTIR study 总被引:2,自引:0,他引:2
Singh R Kumar A Kirrolia A Kumar R Yadav N Bishnoi NR Lohchab RK 《Bioresource technology》2011,102(2):677-682
The present study was conducted to investigate the chromium(VI), COD and sulphate removal efficiency from aqueous solution and treatment of real effluent (CETP) in a small scale bioreactor using sulphate reducing bacteria consortium. Effect of different hydraulic retention times (HRTs), initial metal concentrations, various carbon sources and temperatures were studied on removal of chromium(VI), COD and sulphate. Maximum chromium(VI) and sulphate removal was found to be 96.0% and 82.0%, respectively, at initial concentration of 50 mg l−1 using lactate as carbon source. However, highest COD removal was 36.2% in medium containing fructose as the carbon source and electron donor. NADH dependent chromate reductase activity was not observed which indicated the anaerobic consortium. Initially consortium medium with a strong negative oxidation reduction potential indicated the reducing activity. The FTIR spectrum of the sulphate reducing bacteria consortium clearly shows the existence of the sulphate ions and signifies that sulfate reducing bacteria have used sulfate during the growth phase. 相似文献
88.
Amirtharaj Francis Singh Pooja Singh Rajender Periyasamy Govindaraj Nageswara Rao Tipirisetti Daminani Surekha Digumarthi Raghunatha Rao Lakshmi Rao Lingadakai Ramachandra Satti Vishnupriya K. Ramalingam Kapaettu Satyamoorthy Kumarasamy Thangaraj 《Mitochondrion》2013,13(6):559-565
The m.10398G > A polymorphism in the MT-ND3 gene has been linked to the manifestation of several neurodegenerative disorders and cancers. Several research groups have analyzed the association between m.10398G > A polymorphism and breast cancer; however, the results do not follow a consensus. We have studied this polymorphism in three Dravidian populations from South India. Analysis on 716 cases and 724 controls found no association between m.10398G > A polymorphism and breast cancer [OR = 0.916 (0.743–1.128); P = 0.409]. Menopausal stratification also revealed no significant association in either pre-menopausal or post-menopausal breast cancer groups. In addition, we undertook a meta-analysis on 16 study groups, comprising a total of 7202 cases and 7490 controls. The pooled odds ratio suggested no significant association of m.10398G > A substitution with breast cancer [OR = 1.016 (0.85–1.22); P = 0.86]. In conclusion, there is no evidence of association between m.10398G > A polymorphism and breast cancer risk among South Indian women. Meta-analysis suggested no overall correlation between this polymorphism and breast cancer risk. 相似文献
89.
Nishi Gupta Saumya Sarkar Archana David Pravin Kumar Gangwar Richa Gupta Gita Khanna Satya Narayan Sankhwar Anil Khanna Singh Rajender 《PloS one》2013,8(7)
Background
Methylenetetrahydrofolate reductase (MTHFR) converts 5,10-methylene tetrahydrofolate to 5-methyl tetrahydrofolate and affects the activity of cellular cycles participating in nucleotide synthesis, DNA repair, genome stability, maintenance of methyl pool, and gene regulation. Genetically compromised MTHFR activity has been suggested to affect male fertility. The objective of the present study was to find the impact on infertility risk of c.203G>A, c.1298A>C, and c.1793G>A polymorphisms in the MTHFR gene.Methods
PCR-RFLP and DNA sequencing were used to genotype the common SNPs in the MTHFR gene in 630 infertile and 250 fertile males. Chi-square test was applied for statistical comparison of genotype data. Linkage disequilibrium between the SNPs and the frequency of common haplotypes were assessed using Haploview software. Biochemical levels of total homocysteine (tHcy) and folic acid were measured. Meta-analysis on c.1298A>C polymorphism was performed using data from ten studies, comprising 2734 cases and 2737 controls.Results
c.203G>A and c.1298A>C were found to be unrelated to infertility risk. c.1793G>A was protective against infertility (P = 0.0008). c.677C>T and c.1793G>A were in significant LD (D’ = 0.9). Folic acid and tHcy level did not correlate with male infertility. Pooled estimate on c.1298A>C data from all published studies including our data showed no association of this polymorphism with male infertility (Odds ratio = 1.035, P = 0.56), azoospermia (Odds ratio = 0.97, P = 0.74), or oligoasthenoteratozoospermia (Odds ratio = 0.92, p = 0.29). Eight haplotypes with more than 1% frequency were detected, of which CCGA was protective against infertility (p = 0.02), but the significance of the latter was not seen after applying Bonferroni correction.Conclusion
Among MTHFR polymorphisms, c.203G>A and c.1298A>C do not affect infertility risk and c.1793G>A is protective against infertility. Haplotype analysis suggested that risk factors on the MTHFR locus do not extend too long on the DNA string. 相似文献90.
Singh Pooja Amirtharaj Francis Singh Rajender Rakesh Tamang Raja Rajkumar Karan Singh Saini Kaling Megu Madhu Mati Goel Daminani Surekha Digumarthi Raghunatha Rao Lakshmi Rao Lingadakai Ramachandra Sandeep Kumar Surender Kumar Satti Vishnupriya Kapaettu Satyamoorthy Mahendra Pal Singh Negi Kumarasamy Thangaraj Rituraj Konwar 《PloS one》2013,8(10)