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Drying in Thin Sections of Wetwood-Infected Hoop Pine

Drying in Thin Sections of Wetwood-Infected Hoop Pine Introduction 'Wetwood' describes a condition, usually of comparatively high moisture content, variously found in the wood of conifers and hardwoods. It occurs within the heartwood, sometimes comprising the innermost core, or in association with the sapwood-heartwood transition zone. It is often darkly discoloured although, at times, appears indistinguishable in appearance from the surrounding wood (Ward and Pong 1980). Wetwood is generally thought to be caused by bacterial infection (Bauch et al. 1975; Ward 1986), although some workers have suggested that it constitutes only pockets of high moisture content occurring normally in the stem (Schroeder and Kozlik 1972; Yazawa et al. 1965). However, it usually has an unpleasant sour or acrid odour, a feature attributed to fatty acids produced by bacterial activity (Ward and Pong 1980). In the utilisation of wood, wetwood poses significant problems in drying. While affected material may collapse and/or show severe internal and surface checking (Kemp 1959; Ward and Pong 1980), the greatest problem appears to be the slow drying rate. This may be due to a lower permeability for wetwood Holzforschung / Vol. 50 / 1996 / No. 1 © Copyright 1996 Walter de Gruyter · Berlin · New York (Kemp 1959; Kozlik et http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood de Gruyter

Drying in Thin Sections of Wetwood-Infected Hoop Pine

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References (15)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0018-3830
eISSN
1437-434X
DOI
10.1515/hfsg.1996.50.1.55
Publisher site
See Article on Publisher Site

Abstract

Introduction 'Wetwood' describes a condition, usually of comparatively high moisture content, variously found in the wood of conifers and hardwoods. It occurs within the heartwood, sometimes comprising the innermost core, or in association with the sapwood-heartwood transition zone. It is often darkly discoloured although, at times, appears indistinguishable in appearance from the surrounding wood (Ward and Pong 1980). Wetwood is generally thought to be caused by bacterial infection (Bauch et al. 1975; Ward 1986), although some workers have suggested that it constitutes only pockets of high moisture content occurring normally in the stem (Schroeder and Kozlik 1972; Yazawa et al. 1965). However, it usually has an unpleasant sour or acrid odour, a feature attributed to fatty acids produced by bacterial activity (Ward and Pong 1980). In the utilisation of wood, wetwood poses significant problems in drying. While affected material may collapse and/or show severe internal and surface checking (Kemp 1959; Ward and Pong 1980), the greatest problem appears to be the slow drying rate. This may be due to a lower permeability for wetwood Holzforschung / Vol. 50 / 1996 / No. 1 © Copyright 1996 Walter de Gruyter · Berlin · New York (Kemp 1959; Kozlik et

Journal

Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood – de Gruyter

Published: Jan 1, 1996

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