The atmospheric environment—an introduction

The atmosphere is part of the environment with which the human organism is permanently confronted. Epidemiological research investigates the occurrence of effects on morbidity and mortality due to heat, cold, air pollution and changes in the weather. Concentrating on aspects of the environment relevant for medical questions, three major complexes of effects can be discriminated: the complex conditions of heat exchange, the direct biological effects of solar radiation, and air pollution. Biometeorological knowledge can serve to assess the atmospheric environment, and can also be of help in the field of preventive planning, to conserve and develop the climate as a natural resource with regard to man's health, well-being and performance.     

镍络合物在形成碳─碳键交叉偶联反应中的应用

本文就镍结合物在形成碳－碳键交叉偶联反应中的性能及活性做了探索和研究。并对合成产物进行了光谱分析及测试。     

桥联多核铬配合物的研究进展

多核铬配合物既可以作为葡萄糖耐量因子(GTF)的模型配合物,同时在分子磁材料的研究中占有重要地位,得到了广泛的研究.结合55篇参考文献,概述了近年来氧桥联、氰桥联、硫氰根桥联等多核配合物的研究进展状况.     

Sublayer spacing and electronic structure of intercalaration complexes

The total energy of intercalation complexes MTIS₂(M=Cr, Fe, Ni) as a function of sublayer spacingc ₁ has been calculated by the LMTO-ASA method. Thus the optimum values of sublayer spacing of MTiS₁ are found. The corresponding band structure and the density of states of the materials are then calculated. The calculation is in good agreement with the experimental results. Supported by the National Natural Science Foundation of China Feng Xianyi: born in Jan. 1937, Professor     

Mg、Ca、Sr和Ba—PDTA金属络合物分子内过程的DNMR研究

用核磁共振波谱仪测定了Mg、Ca、Sr和Ba-PDTA络合物分子在一定温度时的~1H-NMR谱。通过对这些谱线的定性分析和定量研究得到了一些新的结果,求出了Ca和Mg-PDTA络合物的在不同温度时的分子内交换的速率常数和活化参数,并对这些结果进行了讨论。     

稀土硝酸盐与四溴二苯并-18-冠-6固体配合物的合成与性质

在非水溶剂中合成了三种未见报道的四溴二苯并-18-冠-6(L)与硝酸?、硝酸铈和硝酸铵的M∶L为1∶1型非溶剂合、不含水的固体配合物.对此进行了元素分析、红外光谱、紫外光谱、差热-热重分析和X-射线粉末衍射分析.红外光谱等结果表明-Br未参与配位,而冠醚氧原子与金属离子直接配位,NO_3~-为双齿配位,故可推测配合物中心离子的配位数为12.