A study of the microstructure of CTAB/1-butanol/octane/ water system by PGSE-NMR and Cryo-TEM

In this work, the effect of octane concentration on the phase behavior of CTAB/water/1-butanol system was studied by using pulsed field gradient spin-echo NMR measurements and freeze fracture electron microscopy (Cryo- TEM and FFEM). When the octane concentration increases, the liquid crystalline phase is destabilized and a continuous single-phase microemulsion region from the water apex to the oil apex is formed. The conductivity behavior has a distinct percolative phenomenon, which indicates that the single-phase microemulsion is changed continuously from oil- in-water (o/w) structure via a bicontinuous structure to water-in-oil (w/o) structure. This result is consistent with those of the PGSE-NMR, Cryo-TEM, and FFEM. In the w/o region, the self-diffusion coefficient of water is relatively high ((1—6)×10^-10 m·s^-1) due to the higher solubility of water in the continuous phase consisting of octane (10% by weight) and 1-butanol. The penetration of a large amount of octane molecules between surfactant chains results in the much lower self-diffusion coefficient of octane.     

Investigating the function of Akt by tet-off inducible expression system

A tet-off inducible cell line named BBT derived from BA/F3b cell line was constructed and the effect of this inducible expression system was significant when detected by tet-off responded luciferase reporter gene assay. Then tet-off responded Akt expression plasmid was transfected into BBT cells, and the stable cell lines were screened. The result of Northern blot showed that the expression of akt was significantly inducible. The clone with the best inducible effect was selected and named BBA for investigating the function of Akt. We found that Akt could significantly inhibit zinc-induced decrease of cell viability when assayed by MTT method. And the flow cytometric analysis showed that Akt could markedly repress zinc-induced apoptosis.     

高层建筑消防超压问题探讨

文中就消防给水产生非正常超压给灭火带来的些不利影响和如何防止以及在工程设计中应注意的问题进行了阐述。     

论精神价值的特性及其在人类生活中的地位和作用

精神价值具有五个方面的基本特性 :满足人的精神需要 ;其价值量不能用货币形态或市场价格来衡量 ,而是根据其对人类生活近期和长期的作用力和影响力来衡量 ;具有无形的特征 ,它作用于使用者但又不被使用者消耗掉 ;具有无限的传播性、放大性和增值性 ;具有长久性和永久性。因而 ,精神价值在人类生活中的地位和作用首先表现在精神价值并不是人类生活的奢侈品 ,而是人类生活的必须品。其次 ,精神价值是人类创造经济价值的动力和源泉。第三 ,精神财富是人类文明的基石和支柱     

飞行体物质的自隐形特征

应用运动体的相对论变换诱导出其自身的介电常数和磁导率变化，开拓出一类新型的运动体自隐形机制首先明确自隐形概念，再介绍隐形原理和自隐形关系最后指出这些结果可供隐形功能材料设计参考．     

新型磺酰胺类除草剂的设计、合成和生物活性

利用已构建的ALS抑制剂的药效团模型，设计并合成了四种新型磺酰胺类化合物，并进行了结构表征，利用平皿法和ALS酶的离体测定法进行了生物活性测定，结果表明它们具有一定的生物活性，为进一步开发具有实用价值的除草剂作了有益的尝试。     

中水道技术在实际工程中的应用

本文主要立足于我国国情，特提出我国近期污水利用，主要先对大型独立建筑物或小区系统中污水较轻的洗涤污水进行简单处理的作为“中水”主要用于冲厕所等用。并着重从可行性研究入手，从国内外污水利用实例和处理工艺及长远的水资源利用上说明此观点在我国近期和远期都是符合我国国情的。     

变压器外部短路时差动保护整定计算的分析

本文通过对变压器外部单相接地短路与三相短路电流分布的分析比较，提出准确选择穿越变压器的最大短路电流的原则，避免了不利条件下差动保护装置的误动作。     

机床传动系统采用公用齿轮的特点及其设计

本文着重从理论上阐述了采用双公用齿轮的特点,提出实际设计多传动比传动系统的关键在于求出双公用齿轮传动比和齿数,并导出所用的公式和提供实际设计计算使用的图表。     

专家数据信息后处理的群排序方法

本文在已知专家个体独立排序的条件下,定义了群体排序时方案隶属于第K位的隶属度,由此给出了两个计算群体排序权值的公式。通过理论分析及实例计算、比较,说明该方法计算简单,并有较强的合理性。特别对于只能获得个体排序的次序而不知其相对权重的情形,此方法更为的效。