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Effect of Tea Polyphenols on Rheological Properties of High-Gluten Wheat Dough

ZHANG Haihua, ZHU Yuejin, ZHANG Shikang, XU Zhong, SHI Peng, HUANG Yunyun, LI Dawei   

  1. 1. Hangzhou Tea Research Institute, All China Federation of Supply and Marketing Cooperatives, Hangzhou 310016, China;
    2. School of Food Engineering, Harbin University of Commerce, Harbin 150076, China
  • Online:2016-07-15 Published:2016-07-26
  • Contact: ZHU Yuejin

Abstract:

The rheological properties of high-gluten wheat dough with addition of tea polyphenols (TPs) were explored
with farinograph, extensograph, glutograph and AR-G2 rheometer. Wheat dough rheological properties showed TPs content
dependence. The addition of 0.5% TPs resulted in an increase in dough formation time, stability time, stretch resistance,
stretch ratio, shear relaxation angle and viscoelastic moduli. Nevertheless, dough formation time, relaxation angle and
viscoelastic moduli declined upon the addition of 1.0% TPs. By further increasing the amount of TPs added to 2.0% and 3.0%,
almost all indexes were reduced to levels lower than those observed with the addition of 0.5% TPs. This phenomenon may
be hypothetically due to the reducibility of TPs and the formation of TP-gluten protein complex.

Key words: wheat dough, tea, tea polyphenols, rheological properties, farinograph, extensograph

CLC Number: