Evaluation of Black Tea Polyphenol Extract Against the Retrogradation of Starches from Various Plant Sources
Huaxi Xiao, Qinlu Lin, Gao‐Qiang Liu, Fengxiang Yu
Molecules
Abstract
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.
Extracted Claims
4 claims extracted from this paper into the knowledge graph
black tea polyphenol extract (BTPE) increases gelatinization temperature
“DSC analysis shows that the gelatinization temperature of maize starch and starches from different rice varieties increased with increasing BTPE level.”
black tea polyphenol extract (BTPE) has no significant influence on gelatinization and retrogradation characteristics
“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 retrogradat...”
black tea polyphenol extract (BTPE) affects crystalline region and intensities of X-ray diffraction peaks
“Adding BTPE significantly affected the crystalline region and intensities of X-ray diffraction peaks of maize and rice starch granules.”