英语语法分析

The anti-oxidative effect of hawthorn extracts origin from different process were study by using DPPH and pyrogallol autooxidation methods in this manuscript.

采用不同提取方法提取山楂活性成分，分别用DPPH法、邻苯三酚自氧化法测定了不同提取物的抗氧化作用。