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vol.15 número1THE EFFECT OF WOOD SPECIES ON THE ANTI-SKID RESISTANCE OF COATINGSBONDING BEHAVIOR OF Eucalyptus benthamii WOOD TO MANUFACTURE EDGE GLUED PANELS índice de autoresíndice de assuntospesquisa de artigos
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Maderas. Ciencia y tecnología

versão On-line ISSN 0718-221X

Resumo

HERNANDEZ, Vicente. RADIATA PINE pH AND BUFFERING CAPACITY: EFFECT OF AGE AND LOCATION IN THE STEM. Maderas, Cienc. tecnol. [online]. 2013, vol.15, n.1, pp.73-78.  Epub 18-Dez-2012. ISSN 0718-221X.  http://dx.doi.org/10.4067/S0718-221X2013005000007.

In this work the effect of age and location within the stem on pH and buffering capacity of radiata pine sapwood was investigated. Mature and juvenile wood samples from three different heights in the trunk were obtained from 20, 25, and 30 year-old trees. Aqueous wood extracts from the samples were used to determine the pH and buffering capacity of wood. Results show a significant effect of age and location in the tree, although a strong interaction among all factors was also detected. In general sapwood tended to be more acidic in the lower part of trees, but juvenile wood showed to be more acidic than mature wood. From both type of wood tested, juvenile wood was more sensitive to change its pH and buffering capacity with the height and age. The effect of wood pH and buffering capacity in the manufacture of wood composites is discussed and further research is recommended to determine whether the variations detected in this study can affect the curing of resins and quality of wood base composite manufactured with radiata pine wood.

Palavras-chave : pH; acidity of wood; buffering capacity; acid; alkali; radiata pine; age; height; juvenile wood; mature wood.

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