The structures of 200 rare earth carboxylates are summarized systematically. The structural skeletons and the coordination modes of the carboxyl groups are discussed in detail. The structures are classified in to six groups: monomer, dimer, tetramer,polymeric chain, polymeric layer and 32dimensional networks. The most common coordination numbers are 8 or 9.

This paper outlines the discovery, developments and the present situation of organic superconductors, particularly for the recent experimental results. The methods for theoretical study and the concept of exciton model are presented in detail. The aspects of future research are discussed as well.

This review describes the detection methods for AIDS virus and CD⁺₄ target cells, and gives an insight into the interaction between envelope glycoprotein gp 120, its cellular receptor CD₄ and small peptides. The methods for the analysis of anti-AIDS drugs are given.

The research achievements concerning structure activity relation ships(SARs) of polychlorinated biphenyls (PCBs) are systematically reviewed. The researching methods of SARs, classification of PCB congeners, activities, the toxicity equivalence factors and reactivity models are discussed.

In this paper, the current methods for the preparation of capillary gel electrophoresis column is reviewed. Possible factors that cause the in stability of the capillary gel column are mentioned. The trends of capillary gel electrophoresis are discussed. 33references are cited.

The progress in the numerical calculation of the various PMO methods made by Salem , Wolfe, Bernardi, Imamura, Morokumaetal. , is reviewed1

The structures of the main ions Li⁺ 、Na⁺ 、K⁺ 、Mg²⁺ 、Ca²⁺ 、Cl^- 、SO^2-₄ 、NO^-₃ and pure water contained in salt lakes have been described. The main experimental methods were introduced briefly. The state of arts and prospect of the research in aqueous solution structure were analyzed and discussed1

The methods of chemical modification, such as typical reactions of cellulosic materials——esterifications and etherifications, for converting wood in to meltable or soluble materials, and the applications of these new materials are reviewed.