微波辐射条件下米糠中解脂酶活性的研究

Activity of lipase in rice bran in microwave radiation

以新鲜米糠为原料,研究了微波辐射对米糠中解脂酶活性的影响。实验结果表明,微波辐射具有很好的降低米糠中解脂酶活性的作用,并随着微波功率的增大,辐射时间的延长,解脂酶活性变得更低。实验条件下,微波处理250g米糠的最佳条件为:高火处理,辐射时间为8min,物料含水12%～14%。经过处理,米糠可安全贮藏一个月,米糠油酸值增加值小于25mgKOH/g。

The oil of the rice bran can be hydrolyzed into serious of acids by lipase.According to the change of the index of free fatty acids, the effect of microwave radiating on the lipase of rice bran was studied. The results show that using the high power of microwave stove,250 g rice bran with moisture 12%～14% is radiated by microwave for 8 min,the treated rice bran can be safely stored for a month,and the change of index of free fatty acids is less than 25 mgKOH/g.