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Ann. For. Sci.
Volume 61, Number 3, April-May 2004
Page(s) 277 - 282
Ann. For. Sci. 61 (2004) 277-282
DOI: 10.1051/forest:2004020

On the durability of Burkea africana heartwood: evidence of biocidal and hydrophobic properties responsible for durability

Béli Neya, Mohamed Hakkou, Mathieu Pétrissans and Philippe Gérardin

Laboratoire d'Études et de Recherches sur le Matériau Bois, UMR INRA 1093, Faculté des Sciences et Techniques. Université Henri Poincaré, Nancy 1, Bld des Aiguillettes, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France

(Received 19 September 2002; accepted 5 March 2003)

Abstract - Analysis of the extracts contained in Burkea africana heartwood is studied with the aim of better understanding the reasons of the exceptional durability of this type of wood. The results obtained show that in spite of the fungicidal and termiticidal properties of certain products contained in the extracts, these properties do not allow to explain entirely the reasons of the durability. The strongly hydrophobic character of wood as its high dimensional stability would be also significant factors of its resistance. Analysis of the products present in the diethylether extracts indicates the presence of fats, waxes and squalene which could be the reason of the preceding results.

Résumé - À propos de la durabilité du bois de coeur de Burkea africana. L'analyse des matières extractibles contenues dans le Burkea africana est étudiée dans le but de mieux comprendre les raisons de la durabilité exceptionnelle de ce type de bois. Les résultats obtenus montrent que malgré les propriétés fongicides et termiticides de certains produits contenus dans les extraits, ces dernières ne permettent pas d'expliquer entièrement à elles seules les raisons de la durabilité. Le caractère hydrophobe du bois ainsi que sa forte stabilité dimensionnelle seraient également des facteurs importants de sa résistance. L'analyse des produits présents dans les extraits éthérés indique la présence de graisses, de cires et de squalène pouvant être à la base des résultats précédents.

Key words: Burkea africana / extract / durability / dimensional stability / wettability

Mots clés : Burkea africana / extrait / durabilité / stabilité dimensionnelle / mouillabilité

Corresponding author: Philippe Gérardin

© INRA, EDP Sciences 2004

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