食品科学 ›› 2012, Vol. 33 ›› Issue (4): 71-76.doi: 10.7506/spkx1002-6630-201204015

• 工艺技术 • 上一篇    下一篇

响应面法优化玉米黄粉蛋白的酶解工艺

郑明洋,王元秀,张桂香,孙纳新   

  1. 1.山东省医学科学院 2.济南大学-山东省医学科学院医学与生命科学学院
  • 出版日期:2012-02-25 发布日期:2012-02-14
  • 基金资助:
    济南市科技发展计划项目(TNK0908)

Optimization of Hydrolysis Process for Corn Gluten Meal by Response Surface Methodology

ZHENG Ming-yang,WANG Yuan-xiu,ZHANG Gui-xiang,SUN Na-xin   

  1. 1. Shandong Academy of Medical Sciences, Jinan 250062, China; 2. College of Medicine and Life Sciences, Shandong Academy of Medical Sciences-University of Jinan, Jinan 250022, China
  • Online:2012-02-25 Published:2012-02-14

摘要: 利用pH-stat法测定碱性蛋白酶和中性蛋白酶对玉米黄粉蛋白的水解度,通过Box-Benhnken响应曲面法优化水解条件。根据单因素试验结果设计中心组合试验,以水解度为指标,采用响应面分析法确定最优水解工艺参数。结果表明:蛋白酶水解的最适条件为酶解pH11.10、酶解温度55.00℃、底物质量浓度112g/L、碱性蛋白酶与中性蛋白酶酶活单位比值5:1、加酶量48000U/g、酶解时间120min;在此条件下,玉米黄粉蛋白水解度实测值为30.23%,模型的预期值为30.84%。采用复合酶水解可提高玉米黄粉蛋白水解度,且工艺简单。

关键词: 蛋白酶, 玉米黄粉蛋白, 响应面, 酶解工艺

Abstract: Response surface methodology based on Box-Benhnken experimental design was employed to optimize conditions for the dual-enzymatic hydrolysis of corn gluten meal to obtain the maximum degree of hydrolysis. The optimal hydrolysis conditions were found as follows: pH 11.10, hydrolysis temperature 55.00 ℃, substrate concentration 112 g/L, activity ratio of alkaline protease to neutral protease 5:1, total enzyme dose 48000 U/g, and hydrolysis time 120 min. Under these conditions, the actual degree of hydrolysis was 30.23%, and the predicted value 30.84%. The dual-enzymatic hydrolysis process was simple and provided a high degree of hydrolysis.

Key words: protease, corn gluten meal, response surface methodology, hydrolysis

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