Origine Biochimique de la Couleur du Bois de Noyer (Juglans sp.)

Abstract : The principal pigments of the walnut wood were identified as being gallic and ellagic acids derivatives. Condensed tannins (flavonoïds) would play the role of precursors of the wood colour while being degraded in brown red pigments of phlobaphenic nature during the formation and the maturation of heartwood. Hydrojuglone glucoside (glucosylated and reduced form of juglone) can be regarded as a major precursor of the walnut wood colour while being (i) completely degraded during the formation of heartwood, (ii) degraded, in vitro, in brown black compounds comparable with the native oxidation products of the heartwood. Moreover, these compounds could be partly responsible for the colour changes occuring during steaming treatment.
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Theses
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http://docnum.univ-lorraine.fr/prive/SCD_T_1999_0092_GRANDIEU_BURTIN.pdf
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Submitted on : Thursday, March 29, 2018 - 10:50:37 AM
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Patricia Grandieu Burtin. Origine Biochimique de la Couleur du Bois de Noyer (Juglans sp.). Sciences agricoles. Université Henri Poincaré - Nancy 1, 1999. Français. ⟨NNT : 1999NAN10092⟩. ⟨tel-01747077⟩

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