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  • Title: Proanthocyanidins from Chinese berry leaves modified the physicochemical properties and digestive characteristic of rice starch.
    Author: Zheng Y, Tian J, Kong X, Wu D, Chen S, Liu D, Ye X.
    Journal: Food Chem; 2021 Jan 15; 335():127666. PubMed ID: 32739821.
    Abstract:
    Proanthocyanidins extracted from Chinese berry leaves (CBLPs) were heated with rice starch in aqueous solution to prepare polyphenols-starch complexes. The physicochemical properties of the complexes were characterized with XRD, DSC, RVA and FT-IR and starch constituents were also analyzed with an enzyme method. Results indicated that the addition of CBLPs destroyed the long ordered structure of rice starch rather than the short ordered structure, since the crystallinity decreased from 21.96% to 18.90% and the ratio of 1047 cm-1/1022 cm-1 showed little difference, consistent with the lower ΔH of complexes with higher CBLPs content. Additionally, the CBLPs-rice starch complexes showed a significantly lower content of rapidly digested starch (RDS, 45.64 ± 3.25%) than that of the native rice starch (67.76 ± 2.15%). These results indicated that CBLPs complexes with rice starch might be a novel way to prepare functional starch with slower digestion.
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