食品科学 ›› 1999, Vol. 20 ›› Issue (12): 32-35.

• 工艺技术 • 上一篇    下一篇

米曲霉C491果胶酶的固定化研究

 陈峰, 俞吉安, 陈九武, 赵学慧   

  1. 上海交通大学生命科学技术学,华中农业大学食品科技系
  • 出版日期:1999-12-15 发布日期:2011-12-04

Studies on immobilization of pectinase from Aspergillus oryzae C491

 CHEN  Feng, YU  Ji-An, CHEN  Jiu-Wu, ZHAO  Xue-Hui   

  • Online:1999-12-15 Published:2011-12-04

摘要: 比较了不同载体对米曲霉C-491果胶酶固定化的效果,表明聚乙烯醇水凝胶法可较好地固定果胶酶。选择聚乙烯醇浓度12%,固定化时间12h,用酶量38.5U/g载体、可使酶活力回收达到67.3%。固定化果胶酶的催化性质研究表明.其最适反应pH为3.8,最适反应温度为50℃,在pH3.4~5.0范围内固定化酶稳定,其温度稳定性比游离酶有明显的提高。

关键词: 果胶酶, 固定化, 聚乙烯醇水凝胶

Abstract: Pectinase (polygalacturomase,Ec3.2.1.15 ) from Aspergillus oryzae ac-491 was im1Tlobilized by a wide range of supports .the most promising system provde to be immobilization I on polyvinate alcohol (PVA)hydrogel.The optimal condition for enzyme immobilization was studied.The optimal pH and temperature of the immobilized enzyme were 3.8 and 50℃.respectively.The immobilized enzyme was stable at the range of pH304~5.0,not stable at the temperature higher than 50℃,but the temperature endurance of immobilized enzyme was higher than that of the natural pectinase

Key words: Pectinase immobilization Polyvinyl alcohol hydrogel