An Analysis on the Growth Point of the Skills and Tactics for Present Table Tennis——Comments on the Developing Trend Of Bohr s Skills and Tactics;
现代乒乓球技战术增长点分析——论波尔技战术发展趋势
This paper introduces the invention, principle of sterilization, dispensing method of bordeaux mixture and the matters needing attention in using.
介绍了波尔多液的发明、杀菌原理、配制方法,以及使用时的注意事项。
A new approach is introduced about bromination of the nitroalkane prior to the aldol reaction to synthesize bronopol which is no usage of organic solvents those are either flammable,toxic,or both,but raising the overall yield to 91.
通过对硝基甲烷先进行溴代反应生成溴代硝基甲烷,再与甲醛进行加成反应的新方法合成布罗波尔,不仅避免了使用有毒易燃非极性有机溶剂,而且使产品的总收率达到912%。