Data/hora: 16/06/2024 01:10:25

Provedor de dados: | 190
País: | Brazil

Título:

Wood hygroscopicity of three forestry species deteriorated by Nasutitermes termites

Higroscopicidade da madeira de três espécies florestais deterioradas por térmitas Nasutitermes

Autores: | Gallio, Ezequiel; Zanatta, Paula; Ribes, Débora Duarte; Beltrame, Rafael; Gatto, Darci Alberto.
Data: | 2018-07-11
Ano: | 2018
Palavras-chave: | Eucalyptus; Shrinkage; Wood quality Recursos Florestais; Engenharia Florestal Eucalipto; Retratibilidade; Qualidade da madeira.
Resumo: | The objective of this work was to evaluate hygroscopicity modification of Eucalyptus dunnii, E. saligna and Corymbia maculata wood due to termites attack. Using samples measuring 20 x 20 x 150 mm³ (tangential x radial x longitudinal) the equilibrium moisture content (MCE), linear contractions of the tangential and radial planes (βT e βR), contraction anisotropy (CAβ), water absorption (AA) and water absorption rate (TAA) of healthy and deteriorated wood by Nasutitermes termites were evaluated. It was verified that the termite attack caused increase in TUE and reduction in βT. However, βR and CAβ presented different behaviors, varying among the different species. AA and TAA presented higher water absorption intensity in the first hours of immersion, being higher in the control group in comparison with the deteriorated samples. Possibly the variations in the parameters related to the wood hygroscopicity of the studied species are correlated to the increase of porosity and deterioration mainly of cellulose and hemicelluloses, directly affecting the wood’s ability to absorb and lose moisture, compromising the material quality.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Português

Identificador:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1528

10.4336/2018.pfb.38e201701528

Editor: | Embrapa Florestas

Relação:

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1528/666

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1528/1259

http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/downloadSuppFile/1528/1260

Formato: | application/pdf

Fonte:

Brazilian Journal of Forestry Research; v. 38 (2018)

Pesquisa Florestal Brasileira; v. 38 (2018)

1983-2605

1809-3647

Fonte: | http://creativecommons.org/licenses/by-nc-nd/4.0