Influence of blue stain on density and dimensional stability of Pinus radiata timber from northern Galicia (Spain)
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María C. Abuín Rouco
Abstract
The presence of blue-stain fungi considerably decreases the value of Pinus radiata timber, which is commercially important in Galicia (NW Spain). For this study, seven young pine trees growing in four different plantations were felled, and 20 discs were sampled from different heights in the stems. Parts of the discs were discoloured as a result of fungal infection. The discs were cut into small specimens. Defect-free specimens (controls) were selected for determining density and dimensional stability both in the volume and in the axial direction. Physical properties of fully blue-stained specimens and the controls were compared for each disc based on one-factor analysis of variance. As the factor was blue-stain, the other sources of variation were suppressed, such as tree source, height in the stem, ring width, cambial age and presence of heartwood or sapwood. Most of the physical properties analysed on some sample discs differed significantly between discoloured and unstained wood. The variables most affected by blue stain were basic density and volumetric shrinkage: blue-stained wood was 1.1% lighter and volumetric shrinkage was 5% higher in blue-stained wood than in the controls.
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Articles in the same Issue
- Frontmatter
- Original Articles
- Influence of spruce xylan characteristics on tensile strength of spruce kraft pulp
- Evidence for a very slow disaggregation of lignosulfonates
- Slow relaxation mode of sodium lignosulfonate in saline solutions
- Influence of carboxylic group content on the solution behavior of carboxymethylated lignin (CML) in water
- Chemithermomechanical and kraft pulping of Pinus radiata wood chips after the hydrothermal extraction of hemicelluloses
- In-plane shear strength of paper measured by asymmetric four-point bending test
- Strain distribution and load transfer in the polymer-wood particle bond in wood plastic composites
- Structural changes in spruce wood during different steps of steam explosion pretreatment
- A critical review of the multilayer sorption models and comparison with the sorption site occupancy (SSO) model for wood moisture sorption isotherm analysis
- Hygric properties of Norway spruce and sycamore after incubation with two white rot fungi
- On-line monitoring of hygroscopicity and dimensional changes of wood during thermal modification by means of neutron imaging methods
- Influence of blue stain on density and dimensional stability of Pinus radiata timber from northern Galicia (Spain)
- Bacterial and abiotic decay in waterlogged archaeological Picea abies (L.) Karst studied by confocal Raman imaging and ATR-FTIR spectroscopy
- Effects of vitamin E combined with antioxidants on wood flour/polypropylene composites during accelerated weathering
- Short Note
- Tensile behaviour and fracture mechanism of moso bamboo (Phyllostachys pubescens)
- Lignin masks the presence of fibrillar network structure in the cell corner middle lamella (CCML)
Articles in the same Issue
- Frontmatter
- Original Articles
- Influence of spruce xylan characteristics on tensile strength of spruce kraft pulp
- Evidence for a very slow disaggregation of lignosulfonates
- Slow relaxation mode of sodium lignosulfonate in saline solutions
- Influence of carboxylic group content on the solution behavior of carboxymethylated lignin (CML) in water
- Chemithermomechanical and kraft pulping of Pinus radiata wood chips after the hydrothermal extraction of hemicelluloses
- In-plane shear strength of paper measured by asymmetric four-point bending test
- Strain distribution and load transfer in the polymer-wood particle bond in wood plastic composites
- Structural changes in spruce wood during different steps of steam explosion pretreatment
- A critical review of the multilayer sorption models and comparison with the sorption site occupancy (SSO) model for wood moisture sorption isotherm analysis
- Hygric properties of Norway spruce and sycamore after incubation with two white rot fungi
- On-line monitoring of hygroscopicity and dimensional changes of wood during thermal modification by means of neutron imaging methods
- Influence of blue stain on density and dimensional stability of Pinus radiata timber from northern Galicia (Spain)
- Bacterial and abiotic decay in waterlogged archaeological Picea abies (L.) Karst studied by confocal Raman imaging and ATR-FTIR spectroscopy
- Effects of vitamin E combined with antioxidants on wood flour/polypropylene composites during accelerated weathering
- Short Note
- Tensile behaviour and fracture mechanism of moso bamboo (Phyllostachys pubescens)
- Lignin masks the presence of fibrillar network structure in the cell corner middle lamella (CCML)
