纳米聚合物复合材料开发与技术

简述了聚合物 /纳米无机物复合材料的概况、性能及制造方法     

Energetic landscape of alpha-lytic protease optimizes longevity through kinetic stability.

During the evolution of proteins the pressure to optimize biological activity is moderated by a need for efficient folding. For most proteins, this is accomplished through spontaneous folding to a thermodynamically stable and active native state. However, in the extracellular bacterial alpha-lytic protease (alphaLP) these two processes have become decoupled. The native state of alphaLP is thermodynamically unstable, and when denatured, requires millennia (t1/2 approximately 1,800 years) to refold. Folding is made possible by an attached folding catalyst, the pro-region, which is degraded on completion of folding, leaving alphaLP trapped in its native state by a large kinetic unfolding barrier (t1/2 approximately 1.2 years). alphaLP faces two very different folding landscapes: one in the presence of the pro-region controlling folding, and one in its absence restricting unfolding. Here we demonstrate that this separation of folding and unfolding pathways has removed constraints placed on the folding of thermodynamically stable proteins, and allowed the evolution of a native state having markedly reduced dynamic fluctuations. This, in turn, has led to a significant extension of the functional lifetime of alphaLP by the optimal suppression of proteolytic sensitivity.     

在胎儿发育过程中人MK基因的组织差异性表达

MK是肝素结合因子家族中的一个成员，用RT－PCR研究了第11－16周胎儿龄的胎儿的神经组织与非神经组织中MK基因的组织差异性表达，随着胎儿龄的增加，在神经组织中，MK呈现出规律性的从无互有和从低表达到高表达的趋势，提示它可能在胎儿脑的发育中起着重要的作用，在其他非神经组织中，尽管各组织中MK的表达呈现不同的规律，但看起来总的趋势是趋向活跃。     

Comparative study of the karyotypes of two Egyptian species of bats,Taphozous perforatus andTaphozous nudiventris (Chiroptera: Mammalia)

A detailed karyotypic analysis of two Egyptian species of bats,Taphozous perforatus andTaphozous nudiventris, was made on the basis of conventional data and G-band patterns. No detectable karyotypic difference was found between the two species (2n=42, F.N. 64). By comparison of G-band patterns, some differences between the two species were seen in the corresponding autosomal pairs. These results are reported for the first time in Egypt.     

浅谈普通话的可感性特点

作为审美对象,普通话和其它美的形象一样,是具有特殊规定性的形式和内容的统一体,从形式上看,普通话的可感形象体现在它的语音美及节奏美。     

SIMULTANEOUS REACTION AND LIQUID-LIQUID EXTRACTION IN THE HYDROGEN PEROXIDE PRODUCTION

The gas-liquid-liquid reactive extraction system for preparing hydrogen peroxide via anthraquinone was investigated. The oxidation reaction of hydrogenated working solution was combined with the extraction of hydrogen peroxide from working solution in a sieve plate column. The reaction of 2-ethylanthrahydroquionone with oxygen and the liquid-liquid extraction of hydrogen peroxide take place simultaneously. The oxygen was introduced with hydrogenated working solution through a nozzle in the bottom of the column, which worked as agitated air as well as oxidation reagent. The results showed the oxidation and extraction do not hamper each other, on the contrary, the presence of oxidation gas in the column can promote the transfer of hydrogen peroxide from organic phase to aqueous phase, thus the reaction efficiency and extraction efficiency increased with increasing gas superficial velocity. Furthermore, the oxidation efficiency is almost 100% and the extraction efficiency is higher than 90% in this process.     

双馈电机运行速度对稳态性能的影响

研究双馈电机运行速度对双馈电机稳态性能的影响．首先对比了双馈电机运行于超同步转速及次同步转速时的稳态波形，然后对谐波及稳态参数的变化进行了分析．研究表明双馈电机稳态运行速度对其稳态运行性能有较大影响．     

四元数矩阵的伴随性质

利用代数的方法，研究了四元数矩阵的伴随性质，得出了一系列有意义的新结果．     

论我国利率市场化改革

针对我国现行利率管理体制现状，论述了实现利率的市场化，发挥市场化利率的作用。对建立和完善市场经济体制的重要作用。在我国实现利率市场化需具备条件的前提下。提出了我国利率市场化改革的设想。     

网络环境对高校图书馆采购工作的新要求

阐述了网络环境下图书馆采购信息源的变化，提出了网络环境下对图书馆采购人员综合素质的要求，以及网络时代图书馆的采购原则。