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| Format: | Artículo científico |
| Langue: | en |
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Academia Brasileira de Ciências
2017
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| Accès en ligne: | https://www.redalyc.org/articulo.oa?id=32754216043 |
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Table des matières:
- Tannic extract potential as natural wood preservative of Acacia mearnsii AMANDA G. DA SILVEIRA ELIO J. SANTINI STELA M. KULCZYNSKI RÔMULO TREVISAN ARCI D. WASTOWSKI DARCI A. GATTO Multidisciplinaria (Ciencias Naturales y Exactas) White rot Extractives Wood quality Laboratory testing High toxicity of the preservatives most frequently used in wood treatment and the resulting risks of handling pose a threat to small producers and to the environment. In an attempt to mitigate these problems, the present study was conducted with the objective of evaluating the preservative effect of tannic extract on biodeterioration of Acacia mearnsii wood. For this purpose, untreated and preserved specimens, some with tannin extract and some with a preservative mixture based on CCB (Chromated Copper Borate), were submitted to accelerated rotting trials with the fungus that causes white rot ( Pycnoporus sanguineus ) for 16 weeks. The evaluations were made with a basis on weight loss and chemical components analysis, and they showed that the natural resistance of Acacia wood is moderate when exposed to the white rot fungus. The tannin concentrations showed similar effects to those of the CBB mixture in all evaluations, i.e., they significantly increased the biological resistance of the material, which started to be classified as very resistant to the fungus. Overall, the results suggest that tannin can be considered as a potential natural preservative product. 2017 artículo científico 0001-3765 https://www.redalyc.org/articulo.oa?id=32754216043 en http://www.redalyc.org/revista.oa?id=327 Anais da Academia Brasileira de Ciências application/pdf Academia Brasileira de Ciências Anais da Academia Brasileira de Ciências (Brasil) Num.4 Vol.89