食品科学 ›› 2012, Vol. 33 ›› Issue (7): 96-100.doi: 10.7506/spkx1002-6630-201207021

• 基础研究 • 上一篇    下一篇

α-淀粉酶酶解小麦面粉动力学模型研究

钟昔阳,杨积东,汤玉清,张淑芬,徐玉红,姜绍通   

  1. 合肥工业大学生物与食品工程学院
  • 出版日期:2012-04-15 发布日期:2012-04-20
  • 基金资助:
    合肥工业大学博士专项基金项目(210HGBZ0570);国家大学生创新性实验计划项目(101035938)

Kinetic Modeling of Enzymatic Hydrolysis of Wheat Flour with α-Amylase

ZHONG Xi-yang,YANG Ji-dong,TANG Yu-qing,ZHANG Shu-fen,XU Yu-hong,JIANG Shao-tong   

  1. (School of Biotechnology and Food Engineering, Hefei University of Technology, Hefei 230009, China)
  • Online:2012-04-15 Published:2012-04-20

摘要: 在研究底物质量浓度、酶用量、酶解pH值及酶解温度对α-淀粉酶酶解小麦面粉反应速率影响的基础上,采用Lineweaver-Burk作图法和Wilkinson统计法求解酶解过程的动力学常数Km和Vm,并建立酶解动力学方程。结果表明:在pH值为6.0,温度为60℃条件下,动力学常数Km为2.940mg/mL,Vm为0.348mg/(mL ·min),米氏方程为v=----,且验证实验表明,方程的预测值与实测值基本吻合。在30~60℃的条件下,酶解动力学方程为v=--------[E]总[S]。

关键词: α-淀粉酶, 小麦面粉, 酶解动力学

Abstract: The effects of substrate concentration, enzyme concentration, pH and temperature on the hydrolysis rate of wheat flour by α-amylase were analyzed. Based on this, the Michealis constant (Km) and maximum rate (Vm) were deduced by Lineweaver-Burk plotting and Wilkinson statistical method. Results showed that, under the optimal conditions of pH 6.0 and temperature 60 ℃, the Km and Vm were.2.940 mg/mL and 0.348 mg/(mL ·min), respectively. The Michaelis-Menten equation was v =----. The model-predicted values were consistent with the actually measured values from confirmation tests. At temperatures ranging from 30 to 60 ℃, an enzymatic kinetic equation was obtained as v=---------[E]total[S].

Key words: α-amylase, wheat flour, enzymatic kinetics

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