title: Procyanidins from tormentil: fractionation and study of the anti-radical activity towards superoxide anion.
abstract: A standardised water-soluble extract was prepared from rhizomes of Potentilla tormentilla. The procyanidins in the extract were fractionated according to their degree of polymerisation by chromatography on Sephadex LH20. The anti-radical activities of the different fractions towards superoxide anion were compared when pentamers and hexamers were found to be the most active.
authors.affiliation: Laboratoire de Pharmacie Galénique et Pharmacotechnie Industrielle, UFR Pharmacie, Clermont-Ferrand, France.
authors.forename: B
authors.initials: B
authors.lastname: Vennat
authors.forename: M A
authors.initials: MA
authors.lastname: Bos
authors.forename: A
authors.initials: A
authors.lastname: Pourrat
authors.forename: P
authors.initials: P
authors.lastname: Bastide
mesh_terms: D044946:Biflavonoids; D002392:Catechin / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid; D016166:Free Radical Scavengers; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D044945:Proanthocyanidins; D013481:Superoxides / Q000378:metabolism*
chemical_list: D044946:Biflavonoids; D016166:Free Radical Scavengers; D010936:Plant Extracts; D044945:Proanthocyanidins; D013481:Superoxides; C017674:procyanidin; D002392:Catechin