Wood Science and Technology
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Distribution of chemical components in the walls of kraft and bisulphite pulp fibres
Wood Science and Technology - Tập 10 - Trang 39-46 - 1976
Fines removed from the surfaces of Pinus radiata fibres by beating were identified and characterised in terms of microfibril orientations in the surfaces of beaten fibres. Fines fractions subjected to chemical analyses were selected so that chemical component data could be related to specific layers or lamellae in fibre walls. Carbohydrate distributions within the walls of kraft fibres differed fr......
Growth stress patterns in tree stems
Wood Science and Technology - Tập 24 - Trang 131-142 - 1990
Growth stresses originate in maturation strains, induced in cambial layers during the differentiation and the maturation of new cells, impeded by the mass of the whole trunk. To predict stresses in a stem, one must add successive incremental stresses at successively created points of the growing trunk. Usual measurements of released strains at the surface of a stem do not give the evolution of mat......
Is Fick's law valid for the adsorption of water by wood?
Wood Science and Technology - Tập 29 - Trang 227-229 - 1995
A critical discussion of the physics of wood–water interactions
Wood Science and Technology - Tập 47 - Trang 141-161 - 2012
This paper reviews recent findings on wood–water interaction and puts them into context of established knowledge in the field. Several new findings challenge prevalent theories and are critically discussed in an attempt to advance current knowledge and highlight gaps. The focus of this review is put on water in the broadest concept of wood products, that is, the living tree is not considered. More......
Water potential gradient between sapwood and heartwood as a driving force in water accumulation in wetwood in conifers
Wood Science and Technology - Tập 53 - Trang 407-424 - 2019
Wetwood, water accumulation in the heartwood of tree trunks, is a defect of forest trees and needs to be improved for wood utilization. To understand the mechanism of wetwood formation, differences in water potential between sapwood and heartwood and their seasonal changes were investigated. The water potential of specimens sampled from tree trunks using an increment corer was measured by psychrom......
Evaluation of settlement behaviour of loose-fill insulation material using relaxation tests
Wood Science and Technology - Tập 47 - Trang 343-351 - 2013
In the present paper, preliminary tests on the relaxation behaviour of loose-fill cellulose insulation of varying quality are discussed in order to reveal the dependence of the permanent residual stiffness on the settlement behaviour of the material. The objective is to evaluate the potential of relaxation tests to understand the impact of the material structure on the settlement behaviour.
Evaluation of the arrangement of wood strands at the surface of OSB by image analysis
Wood Science and Technology - Tập 36 - Trang 93-99 - 2002
The objective of this paper is to evaluate the arrangement of wood strands at the surface of oriented strand board (OSB) by image analysis. Two-dimensional image analysis enables the number of strands and the area of each strand to be computed. In addition, the fiber direction of each strand may be measured manually by recording the acute angle between the fiber direction and the longitudinal axi......
Characterization of proanthocyanidin in hot water extract isolated from Pinus radiata bark
Wood Science and Technology - Tập 41 - Trang 235-247 - 2006
Proanthocyanidins (PAs) in the hot water extract prepared from Pinus radiata bark were isolated by a Sephadex LH-20 chromatography. The PAs were characterized using UV/Visible, FT-IR and 13C nuclear magnetic resonance (NMR) spectroscopic techniques, matrix-assisted laser desorption/ionization time of flight (MALDI-TOF) mass spectrometry (MS), and gel permeation chromatography (GPC) analysis. Bate-......
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