The extraction of tannins using different winemaking techniques (part 1)

Tannins consist of a set of monomers named catechins, epicatechins, epigallocatechins and epicatechin-gallate. These monomers occur in different polymeric lengths in the skin and
seed of the grape berry. There is also a difference in the composition of monomers between skin tannins and seed tannins. Only seed tannins contain epicatechingallate.

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