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发光化学镍复合镀层(英文) 被引量:1
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作者 A.Santhi K. N. Srinivasan S. John 《电镀与涂饰》 CAS CSCD 北大核心 2009年第1期15-20,共6页
在90°C下,采用含有25g/L硫酸镍、20g/L次磷酸钠、35g/L柠檬酸钠、0~6g/L卤磷酸钙和15g/L硫酸铵的镀液(pH5.5),制备了基于卤磷酸钙的发光化学镍复合镀层。研究了镀液pH对复合镀层的沉积速率及卤磷酸钙含量的影响。采用硬度测量、... 在90°C下,采用含有25g/L硫酸镍、20g/L次磷酸钠、35g/L柠檬酸钠、0~6g/L卤磷酸钙和15g/L硫酸铵的镀液(pH5.5),制备了基于卤磷酸钙的发光化学镍复合镀层。研究了镀液pH对复合镀层的沉积速率及卤磷酸钙含量的影响。采用硬度测量、磨损测试、腐蚀试验、紫外光谱、扫描电镜和X射线衍射对复合镀层进行了表征。在最佳卤磷酸钙质量浓度(4g/L)下所得的复合镀层含77.59%(质量分数)镍、7.58%(质量分数)磷和14.83%(质量分数)卤磷酸钙。由于卤磷酸钙是硬质粒子,随着其嵌入量的增多,复合镀层的硬度增大。在存在卤磷酸钙的条件下,化学镍复合镀层的耐磨和耐蚀性能均显著提高。 展开更多
关键词 化学镀镍 卤磷酸钙 复合镀层 发光 耐磨性 耐蚀性
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Antimicrobial and antiproliferative prospective of kosinostatin-a secondary metabolite isolated from Streptomyces sp. 被引量:1
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作者 Vinayagam Rambabu Subramaniyan Suba Suburamaniyan Vijayakumar 《Journal of Pharmaceutical Analysis》 SCIE CAS 2015年第6期378-382,共5页
Cancer is a communal health hazard worldwide. The present investigation attempts to evaluate anti- microbial and anticancer potential of kosinostatin on mammary carcinoma cell line (MCF-7). The anticancer and antipr... Cancer is a communal health hazard worldwide. The present investigation attempts to evaluate anti- microbial and anticancer potential of kosinostatin on mammary carcinoma cell line (MCF-7). The anticancer and antiproliferative activities of kosinostatin were analyzed on MCF cell line by MTT assay and cytotoxicity assays like lactate dehydrogenase (LDH) and glutathione (GSH). The secondary metabolite kosinostatin exhibited its apoptotic nature by expressing p53 protein. Collectively, the results acquired from this study promise that kosinostatin shows the potent anticancer activity. 展开更多
关键词 Kosinostatin Secondary metabolite Streptomyces sp. Cytotoxic activity MCF-7
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Prevalence of various pathological conditions in female buffaloes (Bubalus bubalis)
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作者 Perumal Ponraj Sukkum Chang +2 位作者 Nakulan V Rajesh Muthusamy Veeraselvam Kalpana Devi Rajesh 《Asian pacific Journal of Reproduction》 2017年第2期58-67,共10页
The present review article has described the prevalence of various pathological conditions of reproductive system of female buffaloes starting from ovary to vulva and vagina. Various pathological conditions were analy... The present review article has described the prevalence of various pathological conditions of reproductive system of female buffaloes starting from ovary to vulva and vagina. Various pathological conditions were analyzed and tabulated as the total number of animal examined, number of the animals showed pathological lesions, percentage of animal showed various pathological lesions and percentage of individual pathological lesion in different parts of reproductive system of female buffaloes. The incidence of disorders of female genital organs of buffaloes has been reported by various authors at various percentages in different countries. The incidence of pathological conditions was recorded in clinically infertile cows after slaughtering or from apparently healthy buffaloes slaughtered for human consumption and/or based on postmortem examination. This review is comprehensively covering pathological conditions of female buffalo hitherto which was not previously described at one place. This review will provide a comprehensive knowledge about the prevalence of different pathological condition of different parts of reproductive tract of female buffaloes. The review has six numbers of tables described about the various pathological conditions from ovary to vulva and vagina in female buffaloes. The present review article will be very useful to the buffalo farmers, buffalo breeders and researchers are working in buffalo reproduction & breeding and pathology. 展开更多
关键词 Female BUFFALOES REPRODUCTIVE system PATHOLOGICAL conditions INFERTILITY Incidence/Percentage
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Dielectric and Optical Characterization of Boron Doped Ammonium Dihydrogen Phosphate
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作者 Delci Zion Shyamala Devarajan Thayumanavan Arunachalam 《Journal of Crystallization Process and Technology》 2013年第1期5-11,共7页
Single crystals of pure and boron doped ammonium dihydrogen phosphate were grown from aqueous solution by slow solvent evaporation process. ICP studies were done to confirm the presence of the dopant boron in the pare... Single crystals of pure and boron doped ammonium dihydrogen phosphate were grown from aqueous solution by slow solvent evaporation process. ICP studies were done to confirm the presence of the dopant boron in the parent crystal. The values of the lattice parameters were determined by single crystal X-ray diffraction. The pure and doped ADP crystals were found to have tetragonal structure. Complete optical characterizations of the crystals were done using the FTIR, UV-Vis and NLO studies. The presences of the various functional groups in the crystals were identified by FTIR spectrum. The band gap energies of the pure and doped crystals have been calculated at their cut off frequencies using the UV-Vis spectrum. The second harmonic generation efficiency of the crystals was determined. The electric properties of the grown crystal have been analyzed by studying the variation of dielectric constant and dielectric loss with frequency. 展开更多
关键词 Solution Growth ADP Boric Acid Optical TRANSPARENCY NLO DIELECTRIC CONSTANT
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In silico prediction of monovalent and chimeric tetravalent vaccines for prevention and treatment of dengue fever
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作者 Vijayakumar Subramaniyan Ramesh Venkatachalam +1 位作者 Prabhu Srinivasan Manogar Palani 《The Journal of Biomedical Research》 CAS CSCD 2018年第3期222-236,共15页
Reverse vaccinology method was used to predict the monovalent peptide vaccine candidate to produce antibodies for therapeutic purpose and to predict tetravalent vaccine candidate to act as a common vaccine to cover al... Reverse vaccinology method was used to predict the monovalent peptide vaccine candidate to produce antibodies for therapeutic purpose and to predict tetravalent vaccine candidate to act as a common vaccine to cover all the dengue virus serotypes. Envelope(E)-proteins of DENV-1-4 serotypes were used for vaccine prediction using NCBI,Uniprot/Swissprot, Swiss-prot viewer, VaxiJen V2.0, TMHMM, BCPREDS, Propred-1, Propred and MHC Pred. Eproteins of DENV-1-4 serotypes were identified as antigen from which T cell epitopes, through B cell epitopes, were predicted to act as peptide vaccine candidates. Each selected T cell epitope of E-protein was confirmed to act as vaccine and to induce complementary antibody against particular serotype of dengue virus. Chimeric tetravalent vaccine was formed by the conjugation of four vaccines, each from four dengue serotypes to act as a common vaccine candidate for all the four dengue serotypes. It can be justifiably concluded that the monovalent 9-mer T cell epitope for each DENV serotype can be used to produce specific antibody against dengue virus and a chimeric common tetravalent vaccine candidate to yield a comparative vaccine to cover any of the four dengue virus serotype. This vaccine is expected to be highly immunogenic against dengue fever. 展开更多
关键词 dengue serotypes dengue virus vaccine E-proteins MHC and
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