STUDY ON STERILIZATION AND STORAGE OF ENZYMATIC PREPARATIONS BY IRRADIATION

Effects of irradiation with cobalt-60 gamma-rays on sterilization, sto rage and enzymes activity of four kinds of biological enzymatic prepar ations. namely trypsin, pepsin, amylase and liquid carbohydrase. were investigated.The results showed that these enzymes have different sens itivity to irradiation. amylase being the most sensitive. The enzyme a ctivity and enzyme effect of amylase were lowered with irradiation dos e higher than 7 KGY. With irradiation doses between 7-10 KGY, enzyme a ctivity of trypsin and pepsin were stable. Liquid carbohydrase can be stored more than half a year under a natural temperature with a stable enzyme activity without molding.