食品科学 ›› 2012, Vol. 33 ›› Issue (16): 77-83.

• 工艺技术 • 上一篇    下一篇

毛薯粉浆酶法水解的响应面法优化及其动力学研究

何 娇,黄广民*   

  1. 海南大学食品学院
  • 收稿日期:2012-04-09 修回日期:2012-07-14 出版日期:2012-08-25 发布日期:2012-09-07
  • 通讯作者: 黄广民 E-mail:hgmin886699@163.com

Optimization and Kinetics of Enzymatic Hydrolysis of Dioscorea esculenta (Lour) Burkill Tubers

  • Received:2012-04-09 Revised:2012-07-14 Online:2012-08-25 Published:2012-09-07

摘要: 考察毛薯酶法水解液化条件及对酶解动力学进行研究。采用液态高温α-淀粉酶在高温下作用于毛薯粉浆,通过响应面法确定毛薯粉浆最佳水解工艺条件,并对毛薯粉浆酶法水解液化过程进行动力学分析。结果表明:加酶量0.15mL/g、水解温度90℃、pH6.0、毛薯粉浆质量浓度70mg/mL、水解时间50min,毛薯粉浆糖化率可达55.69%。动力学研究表明,米氏常数Km=69.97mg/mL,最大反应速率vm=1.413mg/(mL·min)。

关键词: 毛薯, 响应面, 酶解, 动力学

Abstract: The hydrolysis of Dioscorea esculenta (Lour) Burkill Tubers by thermostable alpha-amylase for starch liquefaction was optimized by response surface methodology. Meanwhile, the hydrolysis process was studied kinetically. The results showed that under the optimized hydrolysis conditions: enzyme dosage of 0.15 mL/g, hydrolysis temperature of 90 ℃, hydrolysis pH of 6.0, substrate concentration of 70 mg/mL and hydrolysis time of 50 min, the DE (dextrose equivalent) was 55.69%. The vm and Km were determined to be 1.413 mg/(mL·min) and 69.97 mg/mL, respectively.

Key words: Dioscorea esculenta (Lour) Burkill, response surface analysis, enzymatic hydrolysis, kinetics