Evaluation of Black Tea Polyphenol Extract Against the Retrogradation of Starches from Various Plant Sources

Molecules

Huaxi Xiao¹  Qinlu Lin¹  Gao-Qiang Liu¹ 

[1] ¹National Engineering Laboratory for Rice and By-product Further Processing, Central South University of Forestry & Technology, Changsha 410004, China

关键词: black tea polyphenol extract;    rice starch;    maize starch;    potato starch;    retrogradation;   

DOI  :  10.3390/molecules17078147

来源: mdpi

【 摘 要 】

The effects of black tea polyphenol extract (BTPE) on the retrogradation of starches from different plant sources were studied using differential scanning calorimetry (DSC) and X-ray diffraction (XRD). DSC analysis shows that the gelatinization temperature of maize starch and starches from different rice varieties increased with increasing BTPE level. After storage at 4 °C, BTPE at a concentration of 15% markedly retarded the retrogradation of maize starch and starches from different rice varieties. Native maize starch and starches from different rice varieties showed typical A-type X-ray diffraction patterns, while native potato starch showed a typical B-type X-ray diffraction pattern. Adding BTPE significantly affected the crystalline region and intensities of X-ray diffraction peaks of maize and rice starch granules. It is concluded that adding BTPE markedly inhibits the retrogradation of maize starch and starches from different rice varieties, but has no significant influence on the gelatinization and retrogradation characteristics of potato starch.

【 授权许可】

CC BY   
This is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.