Extraction of ellagitannins from oak wood of model casks

Eight experimental model casks were constructed using wood from four oak trees and filled with a 12 % ethanol solution for 200 days. The concentration of ellagitannins was subsequently measured in the solutions and in the inner and outer faces of the cask wood. Only a low proportion of the total ellagitannins was extracted from the wood, and this proportion varied significantly between both different casks and between the eight ellagitannins measured. The two most abundant ellagitannins, castalagin and vescalagin, were the least easily extracted. The concentration of ellagitannins was much lower in the solutions than expected from calculations based on the difference between the inner and outer faces of the wood. This degradation of ellagitannins occurs subsequent to their extraction into solution

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National audienc

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81 ref.International audienc

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National audienc

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75 ref.International audienc

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International audienc

The influence on wine flavor of the oak species and natural variation of heartwood components

International audienc

Characterization of French oak cooperage (Quercus robur L., Quercus petraea Liebl.). Research of the study group on Barrel-aging burgundy wines

19 ref.International audienc

Extraction of ellagitannins from oak wood of model casks

International audienc