Oligomerization mechanism of tea catechins during tea roasting

Volume: 285, Pages: 252 - 259
Published: Jul 1, 2019
Abstract
Roasting of green tea causes oligomerization of tea catechins, which decreases the astringency. The aim of this study was to elucidate the oligomerization mechanism. The 13C NMR spectrum of the oligomer fraction showed signals arising from catechin and sugar residues. Heating of epigallocatechin-3-O-gallate with 13C-labeled glucose (150 °C for 2 h) suggested that condensation of sugars with catechin A-rings caused the oligomerization. The...
Paper Details
Title
Oligomerization mechanism of tea catechins during tea roasting
Published Date
Jul 1, 2019
Volume
285
Pages
252 - 259
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