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New C-Glycosidic Ellagitannins Formed upon Oak Wood Toasting, Identification and Sensory Evaluation

Authors :
Kleopatra Chira
Laura Anguellu
Grégory Da Costa
Eric Pedrot
Michael Jourdes
Tristan Richard
Pierre-Louis Teissedre
Unité de Recherche Oenologie [Villenave d'Ornon]
Université de Bordeaux (UB)-Institut des Sciences de la Vigne et du Vin (ISVV)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Tonnellerie Nadalié
Partenaires INRAE
Source :
Foods, Foods, MDPI, 2020, 9 (10), pp.1-14. ⟨10.3390/foods9101477⟩, Foods, Vol 9, Iss 1477, p 1477 (2020)
Publication Year :
2020
Publisher :
MDPI AG, 2020.

Abstract

In the courses of studies on ellagitannin changes during oak wood toasting, two C-glycosidic ellagitannins were isolated from the french oak wood for the first time. These two compounds exhibited [M−H]− ion peak at m/z 1055.0631 (compound A) and at m/z 1011.0756 (compound B). A compound is named Castacrenin E and is produced by Castacrenin D oxidation. Castacrenin D is a vescalagin with an additional aromating ring to the C-1 through a C-C bond. These compounds are not only found under laboratory conditions but also in commercial oak wood representing different toasting methods and sizes. Their levels are conditioned by oak wood dimensions and toasting degree. The wood pieces with the smallest size present almost two times more compounds A and B. Moreover, the compound B is the only compound to be present in medium toasting temperatures of the smallest wood pieces. Both of them can influence either astringency sensation or bitterness taste.

Details

ISSN :
23048158
Volume :
9
Database :
OpenAIRE
Journal :
Foods
Accession number :
edsair.doi.dedup.....8fc6ccda690ab24eede1402ceb4a2aa5