含氮杂环季铵盐缓蚀剂在CO2-3%NaCl溶液体系中的电化学行为

为控制CO2腐蚀，合成了含氮杂环季铵盐缓蚀剂9912-1，通过电化学实验，研究了该缓蚀剂在CO2-3％NaCl-H2O体系中对碳钢于25℃和90℃下的缓蚀行为。实验结果与挂片失重法测试的结果基本一致。低温下缓蚀效果优于高温下的缓蚀效果。而且该缓蚀剂与硫脲有很好的协同效应。Tafel曲线表明，该缓蚀过程是以控制阴极腐蚀为主，并对其缓蚀机理进行了初步探讨。     

Numerical Filling Simulation of Injection Molding Using Three-Dimensional Model

1 Introduction During injection moulding, the rheological response of polymer melts is generally non-Newtonian and nonisothermal with the position of the moving flow front. Because of these inherent factors, it is difficult to analyze the filling process. Therefore, simplifications usually are used. For example, in middle-plane technique and dual domain technique [1], because the most injection molded parts have the characteristic of being thin but generally of complex shape, the Hele-Shaw …     

基于eZ publish的网站实现方法

eZ publish系统是一种新型的PHP开发框架，其网页模板TPL机制可用于快速地开发网站。本文说明了笔者对eZ publish系统的改进与扩充，以及如何利用这个改进的系统去构建一个大型的专业网站，以实现美工和程序的分离，降低网站开发与维护的成本。     

调频步进信号处理方法探讨

调频步进信号是一种新的高距离分辨率信号。文章首先简要阐述了线性调频信号的处理过程；其次对比步进频率、线性调频步进信号的处理过程，得到一种新的处理方法-合成处理法，最后通过仿真论证其正确性。     

用Ar气制备C—60的研究

在ｋｒａｔｓｃｈｍｅｒ碳弧法中用Ａｒ代替Ｈｅ制出Ｃ－６０。研究了Ａｒ压力为１．３３－９０．６４ｋＰａ时产的Ｃ－６０碳灰，功率消耗，提取率等的关系，并与用Ｈｅ制Ｃ－６０作了比较。     

排列互比法用于超精测角的研究

作者分析了我互比法现行的两种数据处理方法的缺点，提出了应用最小二乘法原理推导出合理的数据处理方法。本文还首次从理论上阐明了排列互比法测量结果中出现一次谐波系统误差的原因，提出了减少和消除这一些系统误差的方法，并给实验验证。     

Ornithine decarboxylase transformation of NIH/3T3 cells is mediated by altered epidermal growth factor receptor activity

Ornithine decarboxylase (ODC) has been shown to be oncogenic in transfected NIH/3T3 cells overexpressing the enzyme from a heterologous promoter. These cells, designated as NODC-2 cells, acquire proliferative properties associated with tumorigenic transformation such as loss of contact inhibition, decreased population doubling time, anchorage-independent growth, and tumor production in nude mice. At least one of these parameters, loss of contact inhibition, remains dependent on elevated ODC levels. We have used these cells to investigate the molecular mechanisms by which ODC overexpression drives cell transformation and to examine the involvement of other proto-oncogene products in this process. An interaction between ODC overexpression and the epidermal growth factor receptor (EGF-R) was suggested initially by the elevation of both basal (300%) and ligand-induced (457%) EGF-R tyrosine kinase activities in NODC-2 cells compared to similarly treated control NLK cells. Disruption of EGF-R mediated signal transduction in NODC-2 cells both by treatment with tyrphostin-25 or by transfection with a vector expressing a dominant negative EGF-R mutant resulted in reacquisition of contact-inhibited growth and suppression of anchorage-independent, clonogenic growth in soft agar. We conclude that ODC-induced transformation of NIH/3T3 cells is mediated, at least partly, by alterations in EGF-R signal transduction activity.     

Corrosion Behavior of a Sputtered K38G Nanocrystalline Coating with a Solid NaCl Deposit in Wet Oxygen at 600 to 700°C

A nanocrystalline coating of K38G alloy was obtained by means of magnetron sputtering. The corrosion behavior of cast K38G alloy and its sputtered nanocrystalline coating with a solid NaCl deposit in dry air or wet oxygen at 600 and 700°C have been studied and compared. The results indicated that the mass gain of the coating is higher than that of the cast alloy at 600 and 700°C. Therefore, nanocrystallization reduced the corrosion resistance at these temperatures. Furthermore, the mass gains of the coating and the cast alloy with a NaCl deposit in wet oxygen were less than that with a NaCl deposit in dry air. The relevant corrosion mechanisms are discussed.     

分光光度法测定黄磷尾气中总磷

实验研究了溴化硝酸吸收－分光光度法测定黄磷尾气中总磷含量的方法，总磷回收≥97%,方法检测限可达0.2μg/mL.