维普中文期刊产品整合服务
38篇 您的检索式:作者名="A Ashok Kumar"
    题名 作者 年代 出处 被引量
1Fabrication of Bi_2O_3/TiO_2nanocomposites and their applications to the degradation of pollutants in air and water under visible-light显示文摘A nanoheterojunction composite photocatalyst Bi2O3/TiO2working under visible-light(λ 420 nm) was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3.Ashok Kumar Chakraborty Md Emran Hossain Md Masudur Rhaman K M A Sobahan 2014Journal of Environmental Sciences2014,26,2:7
2高粱A1型细胞质雄性不育系与保持系线粒体基因组分析比较显示文摘线粒体基因组易位是导致作物细胞质雄性不育(Cytoplasmic male sterility,CMS)性状产生的重要遗传机制。比较高粱A1型细胞质雄性不育系与保持系线粒体基因组,寻找易位区为克隆高粱A1型细胞质雄性不育相关基因奠定基础。以高粱A1型细胞质雄性不育系Tx623A和其保持系Tx623B为试验材料,采用二代Illumina Hiseq结合三代PacBio测序技术,对2个样品的线粒体基因组进行组装,比较和分析不育系和保持系基因组结构和基因差异。高粱Tx623A和Tx623B线粒体基因组大小分别为449 727 bp和452 772 bp,预测编码开放阅读框(Open reading frame,ORFs)分别为147和145个,且两基因组特有基因分别为8个和6个。两线粒体基因组共线性比较分析,发现存在一个57 kb的基因组片段易位的结构变异(Structural variation,SV)区域,该易位区可能与A1型细胞质雄性不育有关。Tx623A和Tx623B线粒体基因组中易位区为高粱A1型细胞质雄性不育基因克隆提供了基因组信息。王平 丛玲 王春语 朱振兴 A Ashok Kumar 张丽霞 陆晓春 2019生物技术通报2019,35,5:3
3Rao Studieson thermal and morphologyical behavior of silieonized epoxy bismaleimide matrices 显示文摘A Ashok Kumar M Alagar R M V G K 2001J Appl Polym Sci2001,81,:1
4Sythesis and characterization of siliconized epoxy-1,3-bis (maleimido) benzene intercrossIinked matrix materials显示文摘ASHOK KUMAR A ALAGAR M RAO R M V G K 2002Polymer2002,43,:1
5Synthesis and characterization of high performance polymeric hybrid siliconized epoxy composites for aerospace applications显示文摘Alagar M Thanikai Velan T V Ashok Kumar A 1999Materials and Manufacturing Processes1999,14,1:1
6Synthesis and Characterization of High Performance Pol- ymeric Hybrid Siliconized Epoxy Composites for Aero- space Applications 显示文摘Alagar M Thanik ai Velan TV Ashok Kumar A 1999Materials and Manufacturing Processes1999,14,1:1
7Geochemical studies of hybrid granite from Madugulapalli area, Eastern Dharwar Craton, Southern India: Implications for crustal mixing显示文摘Magma produced by melting of continental crust and mantle at the Archean-Proterozoic boundary are compositionally variable and chemical compositions provide evidence for the mixing of two sources. Understanding the composition of hybrid magma is essential for determining the comparative infl uence of crust and mantle sources during orogenesis. The hybrid granites are less documented in Indian cratons, especially less in Dharwar Craton. Here we present petrographic and whole-rock geochemical data of Madgulapalli granitic rocks situated in the NE part of the Eastern Dharwar Craton(EDC), to elucidate their petrogenesis and role in crust formation. The Madugulapalli granites(MPG) are composed chiefl y of plagioclase, quartz, and alkali feldspar with associated biotite showing alteration and inter-granular textures. Geochemically, they are metaluminous to peraluminous in nature with calc-alkaline hybrid granite. The hybrid granites exhibit both negative and positive europium anomalies;the lower Rb/Sr, Rb, Sr, and higher Sr/Y,(Dy/Yb)N ratios suggest that the interaction of older rocks with residual garnet source melted at high pressures. We hypothesize that hybrid granites are formed by interaction(e.g., metasomatism, mingling, or mixing) between parental magmas and pre-existing rocks with the infl uence of sanukitoid melts(heat source) in a subduction environment. The genesis of the hybrid granites demonstrates the mixing coupled with diff erentiation in the petrogeny’s residue system in a syn-collision setting followed by continental crust stability in EDC during the Neoarchean period.Nagamma J Ratnakar J Ajay kumar A Ashok Ch 2023Acta Geochimica2023,42,1:1
8Root canal treatment of mandibular second premolar with three separate roots and canals using spiral computed tomographic 显示文摘HARIHARAVEL VP ASHOK KUMAR A Ganesh C 2014Case Reports in Dentistry2014,36,3:1
9Synthesis and Characterization of Siliconized Epoxy--1,3-bis (maleimide)benzene Intercrosslinked Matrix Materials显示文摘Ashok Kumar A Alagar M Rao R M V G K 2002Polymer2002,43,3:1
10Surface-enhanced Raman scattering studies of human transcriptional coactivator p300显示文摘Pavan Kumar G V Ashok Reddy B A Arif M 0,,33:1
11Synthesis and antiglycation potentials of bergenin derivatives显示文摘T Vijaya Kumar Ashok K Tiwari A Robinson 2011Bioorg Med Chem Let2011,21,:1
12Studies on thermal and morphological behavior of siliconized epoxy bismaleimide matrices 显示文摘A Ashok Kumar M Alagar R M V G K Rao 2001J Appl Polym Sci2001,81,10:1
13Comparison of laser in situ keratomileusis for myopic astigmatism without iris registration,with iris registration, and with iris registration-assisted dynamic rotational eye tracking显示文摘Prakash G Agarwal A Ashok Kumar D 2011J Cataract Refract Surg2011,37,:1
14Chemical mechanical planarization for microelectronics applications显示文摘 Kumar Ashok Sikder A K 2004Materials Scienee and Engineering2004,45,3456:1
15Novel ceria - polymer microcomposites for chemical mechanical polishing显示文摘Cecil A Coutinho Subrahmanya R Mudhivarthi Ashok Kumar 2008Applied Surface Science2008,255,:1
16Studies on thermal and morphological behavior of siliconized epoxy bismaleimide matrices 显示文摘A Ashok Kumar M Alagar R M V G K Rao 2001J Appl Polym Sci2001,81,10:1
17Synthesis and characterization of high performance polymeric hybrid siliconized epoxy composites for aerospace applications显示文摘Alagar M Thanikai Velan T V Ashok Kumar A 1999Materials and Manufacturing Processes1999,14,1:1
18Novel ceria - polymer microcomposites for chemical mechanical polishing显示文摘Cecil A Coutinho Subrahmanya R Mudhivarthi Ashok Kumar 2008Applied Surface Sci- ence2008,255,:1
19COx free hydrogen by methane decomposition over activated carbons显示文摘Ashok J Kumar S N Venugopal A 2008Catalysis Communications2008,9,1:1
20Evalua- tion of bilateral minimum thickness of normal corneas based on Fourier-domain optical coherence tomography 显示文摘Prakash G Ashok Kumar D Agarwal A 2010J Cataract Refract Surg2010,36,8:1
返回顶部 每页显示:
共2页 首页 上一页 第1页 下一页 末页 /2 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费