Major water-soluble polyphenols, proanthocyanidins, in leaves of persimmon (Diospyros kaki) and their alpha-amylase inhibitory activity.

@article{Kawakami2010MajorWP,
  title={Major water-soluble polyphenols, proanthocyanidins, in leaves of persimmon (Diospyros kaki) and their alpha-amylase inhibitory activity.},
  author={Kayoko Kawakami and Saiko Aketa and Mitsuhiro Nakanami and Shinzo Iizuka and Masao Hirayama},
  journal={Bioscience, biotechnology, and biochemistry},
  year={2010},
  volume={74 7},
  pages={
          1380-5
        }
}
The amounts and compositions of polyphenol in persimmon leaves and persimmon leaf tea were investigated. The predominant polyphenols in fresh leaves were water-soluble, and the contents reached a maximum (2.40% w/w) in June, and then gradually decreased. Separation of them followed by thiolytic degradation revealed that the major components were unique proanthocyanidin oligomers consisting of four heterogeneous extension units, including epigallocatechin-3-O-gallate. Persimmon leaf tea also… CONTINUE READING
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