Influence of Intraperitoneal Injection of Rare Earth Compounds on the Activities of Antioxidant Enzymes and the Level of Lipid Peroxidation in Mice Livers

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新疆博乐市空间发展战略、博河新区控制性详细规划及城市设计

作为我国及新疆面向中亚的重要开放城市,新疆博乐市的发展应统筹区域资源、结合口岸特色,走出一条新型城镇化道路。规划抓住博河新区发展的有力契机,战略先行、规划引领、理念科学、对接实施,创新了规划编制方式、规划组织形式和规划技术手段,提升了规划可行性,谱写了博乐城市发展的新篇章。     

枢纽水厂自动化设备遭雷击损坏的分析及防范措施

分析水厂自动化设备遭雷击的原因,提出整改办法.通过实践证明措施能够起到防范作用.     

一种新型单级PFC拓扑及控制方式研究

提出了一种基于桥式逆变电路的新型单级功率因数校正变换器的电路拓扑。详细分析了其工作原理及控制方式;研究了该电路拓扑的输入、输出性能指标及其与控制参数之间的关系。通过对实验样机的设计和仿真分析表明,运用该电路拓扑的实验装置,其功率因数较高,输入电流的总谐波畸变较低,输出电压纹波小。     

一种基于桥式电路的单级PFC拓扑及控制方式研究

本文提出了一种基于桥式逆变电路的新型单级功率因数校正变换器的电路拓扑，分析了其工作原理及控制方式，研究了该电路拓扑的输入、输出性能指标与控制参数间的关系。通过对一台输出功率为1100W的通讯电源的设计与仿真分析表明：运用该电路拓扑的实验装置的功率因数较高，输入电流的总谐波畸变较低，输出电压纹波小，而且整个装置的效率也比较高。     

国外稀土新书介绍

随着稀土工业的发展以及分离提取工艺的日益完善,如何进一步开拓稀土元素的新应用领域,已成为当前稀土研究中的重要问题。最近美国出版了两本关于稀土应用的书著。一、以F. Villani主編的“稀土工艺及应用”(Rare Earth Technology and application), Che mical Technology Review No 154,主要收集了自1973年以来有关稀土分离工艺及应用的重要专利。     

LABORATORY OF RARE EARTH CHEMISTRY AND PHYSICS,CHANGCHUN INSTITUTE OF APPLIED CHEMISTRY,ACADEMIA SINICA

The Laboratory of Rare Earth Chemistry and Physics,Changchun Institute of Ap-plied Chemistry,Academia Sinica,has been opened to foreign scientists since October,1987.The first plenary session of the Academic Committee was held in March,1988,andthe first batch of research projects granted by the Scientific Funds of the Laboratory wereapproved at this meeting.     

技术数据

工作幅宽 160厘米转数(社原料而定) 400～500转/分(踏盘)开口平纹斜纹2/1,2/2,3/1 缎纹7/1     

伯胺N_(1923)从硫酸溶液中萃取Sc(Ⅲ)的机理

本文研究了伯胺N_(1923)的正辛烷溶液从硫酸介质中萃取Sc(Ⅲ)的平衡规律。通过IR,NMR测定及斜率法、等摩尔系列法研究了N_(1923)萃取Sc(Ⅲ)的机理。测定并计算了萃取反应的浓度平衡常数和热力学函数。     

Mechanism of Thermal Decomposition of Rare Earth Acetate Hydrates

The mechanism of thermal decomposition of rare earth acetate hydrates(Ln(Ac)_3·nH_2O,n=5,forLn=La;n=4,for Ln=Pr→Lu,Y,except Pm)has been studied by TG-DTG,DSC,infrared spectra,X-raydiffraction and chemical analysis.The thermal decomposition reaction consists of two stages,one is dehydrationand the other one is decompostion.The final product is oxide.It has been found that the temperature of pro-ducing anhydrous acetates decreases with increasing atomic number of rare earth elements.The activation ener-gies for dehydration and decomposition reaction of rare earth acetate hydrates have been calculated byFreeman-Carroll and Kissinger method.The dependence of activation energy Jor dehydration reaction on theatomic number of rare earth elements shows“inclined‘W’effect”.The enthalpy changes for dehydration anddecomposition reaction have been determined.