利用PEG/（NH4）2SO4双水相系统从粗酶液中提取糖化酶。
The glucoamylase was extracted and purified by PEG/(NH4)2SO4 double aqueous phase system.
此时该系统由单相转变为一种液相分散至另一相的分散液，其稳定度取决于分散液的组成距双结点线的距离。
The system became a liquid-liquid dispersion whose stability depended markedly on how far the system was within the binodal.
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