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Etude comparative de méthodes de mesure de l'activité antioxydante : applications aux extractibles de bois : liens avec la stabilité de la couleur du bois

Abstract : We first studied three methods to measure antioxidant activity of phenolic molecules. In order to understand the role of the extracts in the stability of the surface coloured aspect of wood, we have studied, on the one hand, the antioxidant properties of the extractive substances of various wood species, and, on the second hand, the colour stability under solar type irradiation of these species. We measure total phenols in the various extracts. We selected some species taking into account the results obtained as for the stability of colour aspect and the extracts of which were used to impregnate unstable wood from the colour aspect point of view. The principal results are as follows. Content of extracts is not the main cause of colour stability. If correlation between the quantity of phenols in the extracts and antioxidant activity is good, correlation between antioxidant activity of the extracts of a species and the wood colour stability of the same species is weak.
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Theses
File URL :
http://docnum.univ-lorraine.fr/prive/SCD_T_2003_0189_DIOUF.pdf
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https://hal.univ-lorraine.fr/tel-01746805
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Submitted on : Thursday, March 29, 2018 - 10:45:10 AM
Last modification on : Wednesday, September 16, 2020 - 2:33:11 PM

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  • HAL Id : tel-01746805, version 1

Citation

Papa Niokhor Diouf. Etude comparative de méthodes de mesure de l'activité antioxydante : applications aux extractibles de bois : liens avec la stabilité de la couleur du bois. Autre. Université Henri Poincaré - Nancy 1, 2003. Français. ⟨NNT : 2003NAN10189⟩. ⟨tel-01746805⟩

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