The glucoamylase was extracted and purified by PEG/(NH4)2SO4 double aqueous phase system.
利用PEG/（NH4）2SO4双水相系统从粗酶液中提取糖化酶。
The results showed each group of Gracilarla tenuistipitata Var. liui has effectively degrade of NH4-N and PO4-P(p<0.05).
结果表明细基江蓠繁枝变种各密度组对NH4-N和PO4-P都有明显的降解效果（p<0.05）。
Salt: Chemical compound formed when the hydrogen of an acid is replaced by a metal or its equivalent, such as ammonium (NH4).
盐：酸中的氢被金属或相当金属的基团如氨（NH4） 取代后所生成的化合物。
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