TAILIEUCHUNG - Báo cáo lâm nghiệp: "On the durability of Burkea africana heartwood: evidence of biocidal and hydrophobic properties responsible for durability"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: On the durability of Burkea africana heartwood: evidence of biocidal and hydrophobic properties responsible for durability. | Ann. For. Sci. 61 2004 277-282 277 INRA EDP Sciences 2004 DOI forest 2004020 Original article On the durability of Burkea africana heartwood evidence of biocidal and hydrophobic properties responsible for durability Béli Neya Mohamed Hakkou Mathieu PÉTRISSANS Philippe GÉRARDIN Laboratoire d Etudes et de Recherches sur le Matériau Bois UMR INRA 1093 Faculte des Sciences et Techniques. Université Henri Poincare Nancy 1 Bld des Aiguillettes BP 239 54506 Vandreuvre-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. Burkea africana extract durability dimensional stability wettability Résumé - À propos de la durabilité du bois de cieur 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 resistance. L analyse des produits presents dans les extraits éthérés indique la .

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