食品科学 ›› 2008, Vol. 29 ›› Issue (11): 351-355.

• 工艺技术 • 上一篇    下一篇

壳聚糖微球固定碱性蛋白酶的研究

 林松毅, 宋龙凤, 刘静波, 于志鹏   

  1. 吉林大学军需科技学院营养与功能食品研究室;
  • 出版日期:2008-11-15 发布日期:2011-12-08

Study on Immobilization of Alkaline Protease with Chitosan Microspheres

 LIN  Song-Yi, SONG  Long-Feng, LIU  Jing-Bo, YU  Zhi-Peng   

  1. Laboratory of Nutrition and Functional Food,College of Quartermaster Technology,Jilin University,Changchun 130062,China
  • Online:2008-11-15 Published:2011-12-08

摘要: 利用乳化交联法制得壳聚糖微球并用于碱性蛋白酶的固定,借助正交试验设计优化酶固定化条件,结果表明:常温条件下,戊二醛浓度为1%,以给酶量240U/g载体加酶,在pH10缓冲液中,交联20h时,固定化碱性蛋白酶的活力和活力回收率可达到119U/g和49.6%;固定化碱性蛋白酶耐热性较游离碱性蛋白酶较强,4℃的半衰期可达14d。

关键词: 碱性蛋白酶, 壳聚糖, 固定化

Abstract: Chitosan microspheres were prepared by emulsion-crosslinking method for the immobilization of alkaline protease,and then the immobilization conditions were optimized by means of orthogonal test.Results showed that the activity and the recovery rate of the immobilized alkaline protease is up to 119 U/g and 49.6 % respectively under those conditions as follows:glutaral concentration 1%,ratio of alkaline protease to carrier 240 U/g,pH 10,and reaction time 20 h at room temperature.The heat resistance of the immobilized alkaline protease is stronger than that of free one and its half-life is 14 days at 4 ℃.

Key words: alkaline protease, chitosan, immobilization