淀粉与丙烯腈接枝共聚引发方法研究进展

淀粉与丙烯腈进行的接枝共聚反应是一种自由基反应，可以利用各种引发方法引发淀粉形成自由基，而后和丙烯腈进行反应。本文从引发机理、引发效果、以及引发过程中需要注意的问题等各个方面出发，对淀粉与丙烯腈接枝共聚的引发方法做一详细的介绍。     

镁-镧镨铈混合稀土合金微观组织分析

本文作者用扫描电镜、透射电镜以及X射线面扫描等手段分析了镁 镧镨铈混合稀土合金的微观组织。结果表明,添加的镧镨铈混合稀土,只有少量固熔在镁基体中,绝大部分形成了稀土化合物,沿晶界呈网状分布。     

CuO／CeO2 Catalysts for Selective Oxidation of Carbon Monoxide in Excess Hydrogen

CuO/CeO2 catalysts were prepared by a coprecipitation method and tested for CO removal from reformed fuels via selective oxidation. The influence of the calcination temperature on the chemical compositions and catalytic performance of CuO/CeO2 catalysts were studied. It was found that CuO/CeO2 catalysts exhibit excellent CO oxidation activity and selectivity, and the complete removal of CO is attained when the catalysts are calcined at appropriate temperatures. XRD, TPR and XPS results indicate that CuO/CeO2 catalysts exhibit higher catalytic performance in CO selective oxidation due to the strong interaction between copper oxide and cerium dioxide, which promotes the dispersion and hydrogen reduction activity of copper.     

部分无机盐产品2014年1—6月进出口数据

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美国空间放射性同位素电力系统发展概述

【本刊2012年10月综合报道】放射性同位素电力系统(RPS)是自20世纪50年代后期发展起来的一种新型电力系统。与其他电力系统相比,RPS具有寿命长、体积小、结构紧凑、比功率高、工作可靠性强和不受环境影响等优点,可为在人造卫星、宇宙飞船、极地荒原考查、无人气象站等恶劣条件下工作的设施提供电力。