锂离子电池正极材料LiMn2O4的合成与晶体结构（英）

Spinel LiMn₂O₄ powders were prepared using two-step synthesis method consisting of solid-state reaction method and citrate modified sol-gel method. The effects of the calcination temperature and the Li/Mn ratio of raw materials were studied on the physicochemical and electrochemical properties of the spinel LiMn₂O₄ powders, such as crystallinity, lattice constant and density. The title compound was characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Polycrystalline LiMn₂O₄ powers calcined at 750 ℃ were found to be composed of very uniformly-sized microcrystal with an average particle size of 300 nm. The improvement in electrochemical properties was mainly attributed to the process of re-grinding by absolute alcohol.     

抗癌药物多烯紫杉醇载体

多烯紫杉醇(docetaxel)是一种具有良好疗效的抗癌药物,由于其低的水溶性和溶媒所带来的严重副作用,使其临床应用受到限制。基于此问题,通过化学合成的方法,构建抗癌药物多烯紫杉醇载体,一直吸引着科学工作者的广泛关注。本文通过检索近十年来国内外相关文献报道,对多烯紫杉醇载体进行分类,综述其研究进展,并对当前面临的问题进行总结探讨,以期对DTX载体的研发和应用提供参考。     

一种新的拓扑指数用于手性化合物的构效关系研究

为了研究羟酸类和氨基酸类手性化合物的构效关系,本实验引进了手性乘积算法:P＝(1-b/a)(1-c/b)(1-a/c)(1-a/d),其中a、b、c和d分别为与分子中手性中心碳原子4个不同连接片断手性eAm指数和分子连接性指数mx的计算值,并考察了所得参数与羟酸类和氨基酸类化合物手性薄层色谱保留指数的相关性.为了评定所得预测模型的稳定性,文中运用了交叉验证法.结果表明,由人工神经网络方法(BP法)所得数学模型比较稳定,且明显优于多元回归分析结果.     

电解质对非离子型微乳液的影响

本文通过测定微乳液的电导率和相图,研究了电解质(硝酸镍)对非离子型微乳液Triton X-100/正己醇/环己烷/水或硝酸镍水溶液系统稳定性的影响.发现分散相为水的微乳液体系中,表面活性剂的含量越大微乳液的电导率越大;分散相为盐溶液的微乳液体系中,微乳液的电导率随着盐溶液浓度的增大而减小;而且盐溶液浓度越大微乳液的含水量越小.