“ethanol precipitation”簡單造句，ethanol precipitation造句子

1、The crude polysaccharides from Enteromorpha linea were extracted by hot water and refined by ethanol precipitation method.

3、After ethanol precipitation, OPC was separated by ethyl acetate-ligroin system. Content of OPC was determined by normal butyl alcohol-hydrochloric acid method at 546 nm to be over 90%.

2、The extracting conditions of pectin from akebia trifoliate koiaz peels with the ways of ethanol precipitation or FeCl3 solutions were studied.