α-微管蛋白与玉米细胞质雄性不育的相关性研究

采用两个核背景（Mo17,77)的同核异质、同质异核细胞质雄性不育系及正常品系为材料，以合成的α-微管蛋白基因片段为探针，对玉米细胞质雄性不系转育前后的mRNA进行Northern杂交分析，首次直接从转录水平上了玉米细胞质雄性不育系在败育前后α－微管蛋白基因转录量的差异。结果表明，玉米细胞质雄性不育系α－微管蛋白基因在败育前后的转录量存在着明显的差异，败育前的相对转录量大于败育后的相对转录量，证明了α－微管蛋白基因在花粉发育中起着重要作用，与玉米细胞质雄性不育性密切相关。     

RFLP analysis of nov gene in tumor and normal cells

Using human nov (nephroblastoma-overexpressed, nov) DNA as probe, hybridization to total cellular DNAs of tumor and normal cells digested by restriction enzymes BamHI or EcoRI respectively was carried out through Southern blot. It was observed that nov gene in these cells is not only highly conserved, but also certains RFLP characteristic. The correlation between RFLP characteristic of nov gene and its function was analyzed. Supported by the Natural Science Fundation of China and Doctor Station Foundation Zeng Xianchun: born in June, 1966, Ph. D. graduate student     

残余奥氏体定量分析的特殊方法

在一般情况下 ,残余奥氏体的定量分析选用奥氏体的 311线条作为测量的依据 ,但在特殊情况下 ,奥氏体的 311线条极不明显 ,难以测定 .本文介绍在特殊情况下进行残余奥氏体定量分析的方法     

危机管理中的质量分析和数量分析

21世纪,危机管理成为热门并引起人们的广泛注意和应用.质量分析和数量分析是危机管理中两个重要的分析方法.在海上安全方面,通过研究,指出质量分析和数量分析的区别和应用的不同,并给出实例.     

Endothelial cells and VEGF in vascular development

The intricate patterning processes that establish the complex vascular system during development depend on a combination of intrinsic pre-patterning and extrinsic responses to environmental parameters. Mutational studies in mice and fish have shown that the vascular system is highly sensitive to genetic disruption and have identified potential targets for therapeutic interventions. New insights into non-vascular roles of vascular endothelial growth factor and the requirement for endothelial cells in adult organs and stem-cell niches highlight possible side effects of anti-angiogenic therapy and the need for new targets.     

国内数字参考咨询研究论文定量分析

运用文献计量学方法，从论文的年代分布、期刊分布、作者情况及被引等方面，2001～2004年间国内数字参考咨询研究论文进行定量分析，揭示其研究现状、进展及发展趋势。     

国内数字参考咨询研究论文定量分析

运用文献计量学方法,从论文的年代分布、期刊分布、作者情况及被引等方面,对2001～2004年间国内数字参考咨询研究论文进行定量分析,揭示其研究现状、进展及发展趋势.