OLIGOMERIC AND POLYMERIC PROCYANIDINS FROM GRAPE SEEDS

Authors
PRIEUR C RIGAUD J CHEYNIER V MOUTOUNET M
Citation
C. Prieur et al., OLIGOMERIC AND POLYMERIC PROCYANIDINS FROM GRAPE SEEDS, Phytochemistry, 36(3), 1994, pp. 781-784
Citations number
26
Categorie Soggetti
Plant Sciences
Journal title
Phytochemistry → ACNP
ISSN journal
00319422
Volume
36
Issue
3
Year of publication
1994
Pages
781 - 784
Database
ISI
SICI code
0031-9422(1994)36:3<781:OAPPFG>2.0.ZU;2-0
Abstract
Five tannin fractions were isolated from grape (Vitis vinifera) seeds. HPLC analysis of the degradation products released by thioacidolysis showed that all fractions consisted of catechin, epicatechin and epica techin gallate units. Epicatechin was the major component in the exten ded chain. Catechin was more abundant in terminal units than in extens ion units. The proportion of galloyllated units varied from 13% to 29% as the M(r) increased. Mean degrees of polymerization ranging from 2. 3 to 15.1 (by thiolysis) and from 2.4 to 16.7 (by GPC) were determined .