Amphoteric monomer is prepared with acrylic acid , dimethylamine and chloroethanol by Mannich reaction.以丙烯酸、二甲胺、环氧氯丙烷为原料,通过曼尼希反应制得两性离子单体.Biological activities of amphoteric surfactants to higher or lower organisms were i...
Reactions in liquid HF are known that illustrate also amphoteric behavior, solvolysis, or complex formation.已知在液态HF中,也能说明两性行为溶剂分解或络合物形成作用的反应.Biological activities of amphoteric surfactants to higher or lower organisms we...
仍可以由原件复印出无数份副本来。An unlimited number of copies can still be made from the original.我将把原件邮寄给你。I'll send the original to you by post .收信人不在,原件退回.Original mail returned in the absence of the addressee....
Alcohol is a potent drug that anaesthetizes the brain.酒精是一种能麻醉大脑的烈性药物。Their most potent weapon was the Exocet missile.飞鱼导弹是他们最有攻击力的武器。a very potent alcoholic brew烈性酒精饮料...
The spleen tip was palpable at the left costal margin.脾尖可以在左肋缘处触知.a palpable sense of relief如释重负There is an almost palpable feeling of hopelessness.几乎明显有种无望的感觉。The tension between Amy and Jim is palpable...埃米和吉姆之间明显关系紧张。...