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dc.contributor.authorJerez, María-
dc.contributor.authorTouriño, Sonia-
dc.contributor.authorSineiro, Jorge-
dc.contributor.authorTorres, Josep Lluís-
dc.contributor.authorNúñez, María José-
dc.identifier.citationFood Chemistry 104(2): 518-527 (2007)en_US
dc.description10 pages, 5 figures.-- Printed version published Feb 2007.en_US
dc.description.abstractBarks of Pinus pinaster and Pinus radiata were studied as source of procyanidins; these raw materials, considered a byproduct of forestal industry, were extracted with ethanol. The extract was partially fractionated to obtain an aqueous fraction (FA) containing a great part of the procyanidins from barks and with potential application to both food and medical fields. FAs were rich in polyphenols, 65–87% of which were procyanidins; the mean degree of polymerization (mDP) was 7.9 for radiata (rFA) and 10.6 for pinaster (pFA) varieties.en_US
dc.description.abstractThe aqueous fractions were chromatographed on Sephadex LH-20 to obtain specific fractions differing in DP and composition. These fractions were analysed by thiolysis with cysteamine, followed by RP-HPLC. Results showed that (+)-catechin was the main terminal unit for both barks and also the main extension unit for radiata. In contrast (-)-epicatechin was predominant as extension unit in pinaster and this could have implications for applications in oils, emulsions and biological systems.-
dc.description.abstractIn terms of antiradical activity, expressed as specific antiradical units, the entire rFA gave the best results, together with rF5. For P. pinaster bark, the best results were achieved for fractions F5–F8, with DP 7–22. The whole fraction from radiata represents an economic alternative of great interest because the fractionation costs can be avoided.-
dc.description.sponsorshipWe thank Spanish Ministry MCyT for Project PPQ2003-06602-C04-01 and 02.en_US
dc.format.extent19968 bytes-
dc.subjectPinus pinasteren_US
dc.subjectPinus radiataen_US
dc.subjectAntiradical poweren_US
dc.subjectAqueous fractionen_US
dc.titleProcyanidins from pine bark: Relationships between structure, composition and antiradical activityen_US
dc.description.peerreviewedPeer revieweden_US
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