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...
All patients were treated with anterior interbody fusion and internal fixation.所有患者为前路植骨融合加内固定术.Objective To evaluate the effects of allograft fusion cage ( AFC ) on anterior cervical interbody fusion.目的了解同种异体骨圈 ( allogr...
I let the horse drop his head to crop the spring grass.我让马低下头啃吃春天的青草。If unused, winter radishes run to seed in spring.如果不去动的话，冬萝卜会在春天开花结籽。In the spring, the meadow is a mass of daffodils.春天，草地上开满了黄水仙。...