the dependence of the catalytic activities of alpha-chymotrypsin and laccase on the concentration of organic cosolvents ( alcohols , glycols and formamides ) in mixed aqueous media has a pronounced threshold character : it does not change up to a critical concentration of the non-aqueous cosolvents added , yet further increase of the latter ( by only a small percentage , by vol . ) leads to an abrupt decrease in enzyme activity .
C0001975
alcohols
C0017951
glycols