Structural and expressional analysis of a cDNA that expresses predominantly in rice stamens

The development of stamen is an important stage during the sexual reproduction in higher plants. Studying the genes that predominantly or even specifically expressed in stamens will aid in undestanding the molecular mechanism of stamen development. The structure of a rice CHS-like gene (D5) which predominantly expressed in anthers has been analysised, showing high structural similarity with two other anther-specific genes (A1 and BA42) fromBrassica napus. Northern analysis also reveals that the three genes share a similar expression pattern and that the expression of D5 may relate to the early development of pollens. It is concluded that D5, A1 and BA42 represent a group of diverged CHS-like genes which are related to stamen development.     

沥青砂浆粘弹性断裂扩延分析及其断裂特性的推求

以沥青砂浆材料为例,通过薄板的蠕变断裂及单轴拉伸蠕变的试验结果和数据分析,推求出沥青砂浆在不同温度下的断裂特性参数Γ和σｍＩ１。     

Search for new antiphytovirucides

The lead compound of substituted 2-(4′-hydroxyphenyl)benzimidazoles were modified by phosphorylation sulfonation and carboxymethylation. The benzimidazoloamidophosphate (6) (7) have better activity against tobacco mosaic virus (TMV). The benzimidazolophenoxyacetic acid, phenoxysulfonic acid containing trifluoromethyl, and nitro group have 77%≈85% efficiency for wheat rust disease. Supported by the National Natural Science Foundation of China and National Laboratory of Elemento Organic Chemistry Nankai University Qu Fanqi: born in 1952, Associate professor     

水合氯化铜和8—羟基喹啉固相配位反应的热化学研究

用自行研制的具有恒定温度环境的新型反应热量计,以３ｍｏｌ．Ｌ＾－１ＨＣｌ溶液为量热溶剂,在２９８．２Ｋ条件下,测定了配合物Ｃｕ（ＨＱ）Ｃｌ２的标准生成焓,其值为：－３４０．３０ｋＪ．ｍｏｌ＾-１。     

二茂铁甲醛缩胺基硫脲西佛碱与铜、钴配合物的合成表征及抑菌活性的研究

合成了二茂铁甲醛缩胺基硫脲西佛碱及其与Ｃｕ２＋、Ｃｏ２＋的配合物．对其进行了组成分析、红外光谱、核磁共振氢谱、热分析、摩尔电导及抑菌活性实验．结果表明：配体Ｌ组成为Ｆｃ＊ＣＨＮＮＨＣＳＮＨ２,配合物组成为〔Ｃｕ２Ｌ３Ｃｌ３〕Ｃｌ,〔ＣｏＬ２Ｃｌ２〕．抑菌活性实验表明：钴配合物对绿脓杆菌、金黄色葡萄球菌、八叠球菌及大肠杆菌均有较强的抑菌性能     

利用真实砂岩微观孔隙模型研究粘性不稳定指进

利用真实砂岩微观孔隙模型进行了不同油水粘度比下的油水两相驱替试验,研究了粘性不稳定指进;提出了控制注入水粘性指进的注入速度及油水粘度比的要求,对指导油田生产有一定的意义。     

一种高效覆盖的节点放置算法

提出了一种新的高效覆盖的节点放置方法．该算法的目的是使传感器的数目最优化，并确定能支持分布式传感器网络的传感器的配置，其基本思路是剔除局部冗余，提升整体性能．最后通过仿真与已有的算法进行比较，展示了其性能的优越性．     

高纯部分稳定二氧化锆微粉的制备工艺

高纯Zr02微粉作为高温高强特种陶瓷和耐火材料等的重要原料，由于晶型转变所引起的体积效应而影响其耐高温性能，限制其应用范围，因此必须进行晶型稳定化处理．本文介绍了以氧化钇为稳定剂的高纯部分稳定二氧化锆微粉的制备技术及产品质量标准．