您要查找的是不是：
- PMMA＝polymethyl methacrylate聚甲基丙烯酸甲酯
- 用CU膜（cuprophane membrane，铜仿膜）透析，透析过程中血浆SC5b－9浓度变化最大； 其次是用PMMA膜（polymethyl methacrylate，聚甲基丙烯酸甲酯膜）、HE膜（hemophane membrane，血仿膜）。The plasma concentrations of SC5b-9 complex were significantly different between membranes in the rank order: CU> PMMA> HE> PSN.
