结晶型磷一多磷钼酸铵的制及其离子交换性能的研究

本文叙述了弗晶型磷－多磷钼酸铵的制备方法，研究了磷－多磷钼酸铵的化学组成，测定了该经合物的离子交换性能，说明多磷酸根部分取代磷酸根所生成的结晶型磷－多磷钼酸铵对铯离子具有良好的离子交换选择性和较高的离子交换容量，是一类新的结晶型无机离子交换剂。     

关于顺式聚乙炔共振喇曼谱的理论解释

本文建议以双极化子微观模型,根据多声子晶格弛豫理论解释顺式聚乙炔的喇曼谱。在准一维哈密顿量中考虑了电子与不同声子模的耦合,其耦合常数由红外及喇曼实验数据确定。理论计算结果与实验数据进行了比较和讨论。文中采用的方法可以推广到类似的系统 关键词：     

高效液相色谱柱稀匀浆填充方法

本文叙述一种新的高效液相色谱柱填充方法,此法采用粘度分布范围窄的细颗粒填充物(≤10±2μ)及低粘度溶剂制备稀的匀浆(≤4％)。在填充物颗粒没有沉降分级以前,用气动放大泵快速把匀浆压入色谱柱中,制备高效液相色谱柱。     

基桩完整性量化分析

本文针对国内广泛研究基桩低应变检测法的现状,基于阻尼振动和波动理论,结合波形拟合的分析思路,推导出模拟加速度实测信号的拟合方程,编制了MATLAB波形拟合分析程序,并做了试验桩检测验证。分析结果证明,推导的加速度信号方程能够正确模拟实测加速度信号。正确分析出缺陷桩的桩长、缺陷位置和缺陷程度。对实际检测工程有一定的指导意义。     

中职数学课教学局面堪忧

中等职业学校的数学课教学近些年出现了一些令人堪忧的局面,主要是: 一、学生厌学情绪严重.理科班(或全男班)的大部分同学,甚至整个班放弃学习数学(英语等基础课),文科班受其影响学习气氛也大不如前.     

Isolation and Identification of Phosphate-accumulating Strain PAO3-1 and Its Phosphorus Removal Characteristics

A phosphate-accumulating bacteria strain PAO3-1 was isolated from biological phosphorus removal sludge supplied with sodium acetate as carbon source under stable performance. This strain has good enhanced biological phosphorus removal effect on normal activated sludge system. Phosphorus removal ratio was raised form 44%with no added strain to more than 82% with strain strengthening biological phosphorus removal. It is identified to be AlcaUgenes sp. according to its morphology,biochemical characteristics and 16S rDNA sequence analysis. The cell of strain PAO3-1 is straight bacilli form, 0.4×1.1 μm, no flagellum, gram negative and special aerobiotic. The optimal temperature and pH for growth are 32℃-37℃ and 5.5-9.5, respectively. The shape of slant clone is feathery. The phosphate situation, which was 76. 5% higher than that in non-starving situation. Its phosphate release rate of log course in anaerobic phase and in culture without phosphorus was lower than that in log course.     

间规立构聚丙烯的结晶度研究

Ｎａｔａ等用Ｚｉｅｇｌｅｒ－Ｎａｔａ催化剂首次合成了间规度为～５０％间规聚丙烯，并对其进行了表征，指出其具有（ＴＴＧＧ）２螺旋构象，正交晶系，Ｃ２２２１空间群［１，２］．近年来用茂金属催化剂合成的间规立构聚丙烯（ｓＰＰ）的间规度可达９３％以上，高间规...