英语语法分析

The zwitterionic PAN-based membranes can run for a long time and be reused without significant decrease of separation performance.

改性超滤膜能够长期运行，重复利用后分离性质没有显著的降低。

Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed.

通过醛中 间体官能化，还可获得相应的阳离子或两性离子型纤维素酯衍生物。

With the aid of HPLC and silver nitrate titration, the structure of zwitterionic surfactant obtained through the reaction of secondary amide and fatty imidazoline has been analysed.

对仲酰胺和咪唑啉合成的两性表面活性剂的结构，本文分别利用高效液相色谱和硝酸银滴定的方法进行分析。