Durability of Japanese cedar wood impregnated with extractives from Ipe wood

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  • イペ材の抽出成分を注入したスギ材の耐朽性
  • イペザイ ノ チュウシュツ セイブン オ チュウニュウシタ スギザイ ノ タイキュウセイ

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Abstract

The antifungal effects of secondary metabolites extracted from Ipe wood (Tabebuia sp.) were evaluated. The results were as follows.<BR>1) The extractive was obtained in high yield with acetone and ethanol-benzene mixture, and showed a strong antifungal effect in comparison to the extracts obtained with cold water and hot water.<BR>2) After impregnation with the extract, specimens of Japanese cedar sapwood were not decayed by wood rotting fungi according to the method outlined in JIS K1571-2004.<BR>3) However, impregnation of the extractive into beech sapwood was not effective in preventing wood rot. The difference in the effect on Japanese cedar and beech woods was most likely attributable to differences in the extent of adsorption amount of the extractives and the durability of the two woods.<BR>4) After beech wood was soaked in the extractive, analyses performed according to the method described in JIS Z2911-2006 indicated a high degree of resistance against mold growth.

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