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CATALYTIC DEBROMINATION OF DIPHENYL BROMOMETHANE UNDER HETEROPHASE CONDITIONS USING POLYMERS WITH VIOLOGEN STRUCTURE
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作者 Fu Tian LIU Xian Da Yu Shu Ben LI Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou730000 《Chinese Chemical Letters》 SCIE CAS CSCD 1993年第7期577-580,共4页
The debromination of diphenyl bromomethane (Ph_2CHBr) using polymers with viologen structure as electron--transfer catalyst (ETC) afforded tetraphenylethane in good yields under het- erophase conditions.
关键词 PVA than CATALYTIC DEBROMINATION OF DIPHENYL BROMOMETHANE UNDER HETEROPHASE conditionS using POLYMERS WITH VIOLOGEN STRUCTURE
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SOLITARY WAVES IN STRATIFIED FLUIDS AND THEIR INTERACTION
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作者 易家训 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 1993年第3期193-209,共17页
A systematic procedure is proposed for obtaining solutions for soli- tary waves in stratified fluids. The stratification of the fluid is assumed to be expo- nential or linear. Its comparison with existing results for ... A systematic procedure is proposed for obtaining solutions for soli- tary waves in stratified fluids. The stratification of the fluid is assumed to be expo- nential or linear. Its comparison with existing results for an exponentially stratified fluid shows agreement, and it is found that for the odd series of solutions the direc- tion of displacement of the streamlines from their asymptotic levels is reversed when the stratification is changed from exponential to linear. Finally the interaction of solitary waves is considered, and the Korteweg-de Vries equation and the Boussinesq equation are derived. Thus the known solutions of these equations can be rehed upon to provide the answers to the interaction problem. 展开更多
关键词 internal solitary waves stratified liquids exponential stratification linear stratification systematic use of the solubility condition in successive approximations interaction of internal solitary waves detailed derivation of the KdV equa
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