Show simple item record

dc.contributor.authorLongo E
dc.contributor.authorMerkyte V
dc.contributor.authorRossetti F
dc.contributor.authorTeissedre PL
dc.contributor.authorJourdes M
dc.contributor.authorBoselli E
dc.date.accessioned2019-01-04T15:46:26Z
dc.date.available2019-01-04T15:46:26Z
dc.date.issued2018
dc.identifier.issn1076-5174
dc.identifier.urihttp://dx.doi.org/10.1002/jms.4280
dc.identifier.urihttp://hdl.handle.net/10863/7784
dc.description.abstractThe identification of cyclic B-type procyanidins in grape and wine was recently disclosed. Some of these were also found in berries of totally different vegetal species (eg, Vaccinium sp.). However, presence of a wider class of these cyclic condensed tannin compounds with variably substituted monomers has never been addressed so far. Here, an extended list of oligomeric cyclic proanthocyanidins (PAC) bearing variable substitution patterns on the main flavan-3-ol unit has been searched in wines. Nearly 7600 theoretical structures were calculated and searched in red and white wine samples made from different grape varieties. Moreover, a hydrogen/deuterium exchange approach (already applied to a cyclic tetrameric procyanidin) coupled to high-resolution mass spectrometry was applied to confirm their cyclic B-type structure rather than a non cyclic A-type structure, otherwise isomeric and undistinguishable by LC-MS alone. The main group of novel cyclic PAC observed is shown to contain (epi)gallocatechin beside (epi)catechin as the constituent monomers.
dc.description.abstractThe identification of cyclic B-type procyanidins in grape and wine was recently disclosed. Some of these were also found in berries of totally different vegetal species (eg, Vaccinium sp.). However, presence of a wider class of these cyclic condensed tannin compounds with variably substituted monomers has never been addressed so far. Here, an extended list of oligomeric cyclic proanthocyanidins (PAC) bearing variable substitution patterns on the main flavan-3-ol unit has been searched in wines. Nearly 7600 theoretical structures were calculated and searched in red and white wine samples made from different grape varieties. Moreover, a hydrogen/deuterium exchange approach (already applied to a cyclic tetrameric procyanidin) coupled to high-resolution mass spectrometry was applied to confirm their cyclic B-type structure rather than a non cyclic A-type structure, otherwise isomeric and undistinguishable by LC-MS alone. The main group of novel cyclic PAC observed is shown to contain (epi)gallocatechin beside (epi)catechin as the constituent monomers.
dc.languageEnglish
dc.language.isoenen_US
dc.rights
dc.titleRelative abundances of novel cyclic prodelphinidins in wine depending on the grape varietyen_US
dc.typeArticleen_US
dc.date.updated2018-10-31T11:50:43Z
dc.language.isiEN-GB
dc.journal.titleJournal of Mass Spectrometry
dc.description.fulltextopenen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record