米曲霉乳糖酶的研究

研究了米曲霉乳糖酶的菌种选育、影响产酶的因素和最适水解反应条件等 ,结果表明 :“米曲霉 42 0 3”采用固体培养时所产乳糖酶的活力较高 ,在 3 0℃作用于 1 0 %的乳糖水溶液中 ,反应 72h后 ,乳糖的水解率可达70 %以上。

The selection and cultivation of strain of Aspergillus oryzae, the factors influencing the production of lactase and the most fitting hydrolytic reaction condition, and so on are investigated in this paper. The results prove that: when we adopt solid culture of Aspergillus oryzae 4203,lactase that it produces is more active, when it reacts in the 10 percent solution of lactose, the hydrolytic effective of lactose is more 70 percent after 72 hours at 30 ℃.