食品科学 ›› 2011, Vol. 32 ›› Issue (11): 123-128.doi: 10.7506/spkx1002-6630-201111028

• 生物工程 • 上一篇    下一篇

玉米芯固定化单宁酶的工艺条件优化

范 超,黎继烈*,王 挥,郝聚喜,丁丽霞,李忠海   

  1. 中南林业科技大学生命科学与技术学院
  • 出版日期:2011-06-15 发布日期:2011-05-13
  • 基金资助:
    国家林业局“948”项目(2010-4-22);“十一五”国家科技支撑计划项目(2009BADB1B10)

Optimization of Process Conditions for Immobilizing Tannase by Corncob

FAN Chao,LI Ji-lie*,WANG Hui,HAO Ju-xi,DING Li-xia,LI Zhong-hai   

  1. School of Life Science and Technology, Central South University of Forestry and Technology, Changsha 410004, China
  • Online:2011-06-15 Published:2011-05-13

摘要: 探讨改性玉米芯固定化单宁酶的工艺条件。采用Box-Behnkens试验设计和响应面分析方法,对改性玉米芯固定化单宁酶的条件进行优化,得出其最佳工艺条件为:单宁酶酶液与玉米芯载体比26:1(V/m)、pH 6.8、时间8.0h、温度36℃,在此条件下固定化酶活力达到(16085±5)U/g,酶活力回收率为44.68%。对最佳条件下制备的固定化单宁酶的酶学特性进行研究,发现该固定化酶的最适反应pH值为4.5~5,最适反应温度为60℃。

关键词: 固定化单宁酶, 改性玉米芯, Box-Behnken实验设计, 响应面法

Abstract: The process conditions for immobilizing tannase by modified corncob were explored. The Box-Behnken design and response surface methodology were used to optimize immobilization conditions of tannase by modified corncob. The results showed the optimal process conditions were enzyme-to-carrier ratio of 26:1, pH 6.8, immobilization time of 8.0 h and immobilization temperature of 36 ℃. Under the optimal conditions, the activity of immobilized enzyme was (16085 ± 5) U/g, the recovery rate of tannase activity was 44.68%. The optimal reaction pH and temperature of immobilized tannase were 4.5-5 and 60 ℃, respectively.

Key words: immobilized tannase, modified corncob, Box-Behnken design, response surface methodology

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