N - hydroxyethylpyrrolidone ( NHP ) was synthesized from � � - butyrolactone and ethanolamine on Y molecular sieve catalyst by two steps.以改性Y分子筛为催化剂,γ-丁内酯和乙醇胺为原料,采用γ - 丁内酯法两步合成N - 羟乙基吡咯烷酮 ( NHP ).Surface active propertie...
The most abundant phospholipid in many cells is phosphatidyl ethanolamine or cephalin.在许多细胞中,含量最高的磷脂是磷脂酰乙醇胺或脑磷脂.OBJECTIVE To study and improve the synthesis of liposome excipient phosphatidyl ethanolamine.目的研究并改进脂质体辅料磷脂酰...
The seagulls swirled in aerial combat over the barges.海鸥盘旋在驳船上方，展开空中的搏斗。a flock of seagulls一群海鸥Seagulls followed in the wake of the huge ship.海鸥尾随于大船之后....
The book is inscribed: To John Arlott from Laurie Lee.书的题赠是：献给约翰·阿洛特——劳丽·李。Did Laurie know something, and hold it over Felicity?劳丽是否知道点什么，并以此要挟费莉西蒂呢？So Laurie played and Jo listened, with her nose luxuriously buried in h...
他能听见她的狗在暗处吠叫、哀嚎。He could hear her dog barking and whining in the background.他从车库的暗处走出来。He emerged from the dark recesses of the garage.我在暗处端详着自己。I was peering about me in the gloom....