英语语法分析

Partially purified chlorophyll was used to prepare pheophorbide (ph Eide) by chlorophyllase hydrolysis and selective acidic hydrolysis methods.

以初步纯化的叶绿素为原料，利用叶绿素酶水解、选择性酸降解两种方法制备脱镁叶绿酸。