The strong cooperativity of dioxygen binding by dicobalt (II) diporphyrin compounds in nonaqueous solution at room temperature

Thermodynamic data were determined for the reversible binding of O₂ to two compounds of dicobalt(II) di(meso-tetra-phenyl)porphyrin derivatives with different lengths of diamidoaliphatic bridge (abbreviated to Co₂PP₈ and Co₂PP₄) in N,N-dimethylformamide at room temperature. The partial pressure of dioxygen necessary for half-oxygenation (P _1/2) and hill coefficient (n) at 298 K were determined as follows:P _1/2=54.2 kPa,n=2.0 for Co₂PP₈ andP _1/2=6.8 kPa,n=1.8 for Co₂PP₄, respectively. The rate equations of reversible oxygen binding by Co₂PP₈ were determined and the reaction path was proposed. The results of ther-modynamic and kinetic studies indicate that there exists strong cooperative effect during oxygenation of the compounds. The ESR observation reveals that the dioxygen complexes formed in the solutions are of superoxo (Co-O ₂ ⁻ ) type. Supported by the Research Foundation of the State Education Commission of China Zhou Xiaohai: born in 1962, Ph.D. Associate professor     

卤化物与水玻璃复合物的抑尘性能

在恒温箱中测定了粉尘试样添加ＣａＣｌ２或ＭｇＣｌ２和水玻璃后的含水率与环境温度、湿度、有效抑尘时间等因素之间的关系．研究结果表明：（１）当环境温度低于３１℃，相对湿度高于６０％，粉尘试样中ＣａＣｌ２和水玻璃含量的质量分数分别达到２０％和１０％（ＭｇＣｌ２和水玻璃含量的质量分数为２３％和１１．５％）时，试样的含水率就能保持大于５％（质量分数）；（２）当环境温度低于４０℃，相对湿度高于５０％，粉尘试样中ＣａＣｌ２和水玻璃含量的质量分数分别达到２６％和１３％（ＭｇＣｌ２和水玻璃含量的质量分数为３０％和１５％）时，试样的含水率就能保持大于５％（质量分数）；（３）ＣａＣｌ２或ＭｇＣｌ２与水玻璃复合后，其粘尘功能进一步增强，而且其溶液的弱酸性得到进一步降低。     

一种动态载荷的识别方法

提出了一种逆优化系统识别动态载荷的方法。该方法避免了一般载荷识别中频响函数求逆运算中由于矩阵病态而引起的运算及运算失败，从而提高了识别精度，为动态载荷，特别是宽频带、瞬态冲击载荷的识别提供了一种有效途径。     

Binding Sites of La~(3 ) on Camodulin

ＢｉｎｄｉｎｇＳｉｔｅｓｏｆＬａ３＋ｏｎＣａｍｏｄｕｌｉｎ＊ＦｅｎｇＹｕｐｉｎｇ（冯玉萍），ＹｕａｎＨａｏｄａｎ（袁浩丹）＋，ＺｈｏｕＹｕｘｉａｎｇ（周玉祥）＋，ＮｉｎｇＹｏｎｇｃｈｅｎｇ（宁永成），ＺｈａｎｇＲｉｑｉｎｇ（张日清）＋Ｄｅｐａｒｔｍｅ...     

高等院校建立健全质量体系的初步设想

建立健全质量体系是现代高等教育发展的必然趋势，对增强高等院校的管理素质，提高质量能力等方面有着积极作用。本文就高等院校如何建立质量体系进行了初步探讨。     

基于完全OOP技术的交互界面设计

本文介绍了汇编用户集成环境的交互界面设计。结合TVision的使用，建立基础对象，定义方法，着重阐述了完全OOP技术中构造过程和析构过程处理，说明事件驱动中的信息传递，安全编程的原子操作，概括交互界面功能特性及评价。     

健美操对高校学生柔韧素质影响的研究

本文通过健美操教学实践及其量化分析，探讨了健美操对提高高校体育院系学生的柔韧素质的归因和途径。