食品科学 ›› 2007, Vol. 28 ›› Issue (2): 84-87.

• 基础研究 • 上一篇    下一篇

超声辐照马铃薯淀粉糊降解动力学的研究(英文)

 李坚斌, 李琳, 郭祀远, 李冰, 温雪馨   

  1. 华南理工大学轻工与食品工程学院; 华南理工大学轻工与食品工程学院 广东广州510640 广西大学轻工与食品工程学院; 广西南宁530004; 广东广州510640;
  • 出版日期:2007-02-15 发布日期:2011-12-31

Degradation Kinetics of Potato Starch Paste under Ultrasonic Irradiation

 LI  Jian-Bin, LI  Lin, GUO  Si-Yuan, LI  Bing, WEN  Xue-Xin   

  1. 1.College of Light Industry and Food Science, South China University of Technology, Guangzhou 510640,China; 2.College of Light Industry and Food Engineering, Guangxi University, Nanning 530004,China
  • Online:2007-02-15 Published:2011-12-31

摘要: 本文进行了超声辐照时间对超声辐照降解马铃薯淀粉糊的动力学的研究。研究结果表明,淀粉糊重均分子量和特性粘度随辐照时间的延长而降低;而且趋于一个极限值。在处理条件下,超声降解动力学方程式为:Mt=50.97×104+572.77×104e-0.216t,ηt=0.81+6.556×e-0.229t。马铃薯淀粉糊分子链剪切在初始阶段是随机的,然后是非随机剪切。

关键词: 马铃薯淀粉, 超声, 分子量, 特性粘度, 降解动力学

Abstract: The ultrasonic degradation of potato starch paste was undertaken in a reactor. The experimental results showed that the molecular weight and the intrinsic viscosity of potato starch paste decrease with ultrasonic irradiation time, and are approaching two limiting values respectively, below which no further degradation may take place. Ultrasonic degradation kinetics can be explained with the following equations: Mt=50.97×104+572.77×104e-0.216t orηt=0.81+6.556×e-0.229t. The scission of chains in potato starch paste is random in the initial stage, and then non-random.

Key words: potato starch paste, ultrasonic, molecular weight, intrinsic viscosity, degradation kinetics