Differences in Resin Acid Concentration between Brown-Rot Resistant and Susceptible Scots Pine Heartwood
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A. M. Harju
Summary
The concentration of individual resin acids and the equilibrium moisture content at a relative humidity of 100% were studied in brown-rot resistant and susceptible Scots pine (Pinus sylvestris L.) heartwood. About 90% of the resin acids in the heartwood were of the abietane type, abietic acid being the most abundant. The concentration of resin acids was higher in the decay-resistant heartwood than in the decay-susceptible heartwood. Resin acids are presumably in part responsible for the decay resistance of Scots pine heartwood. However, no clear relationship was found between the concentration of resin acids and the equilibrium moisture content. The role of resin acids may also be ascribed to mechanisms other than their hydrophobic properties alone. The reasons for the slight differences in moisture content between the decay classes require further study.
Copyright © 2002 by Walter de Gruyter GmbH & Co. KG
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Articles in the same Issue
- Effect of Growth Rate on Fibre Characteristics in Norway Spruce (Picea abies (L.) Karst.)
- Techniques for Measuring Growth Stress on the Xylem Surface Using Strain and Dial Gauges
- Use of Soft Rot Cavities to Determine Microfibril Angles in Wood; Advantages, Disadvantages and Possibilities
- Surface Roughness and Color Change of Copper-Amine Treated Red Maple (Acer rubrum) Exposed to Artificial Ultraviolet Light
- Differences in Resin Acid Concentration between Brown-Rot Resistant and Susceptible Scots Pine Heartwood
- Antioxidant Activity of Abietane-Type Diterpenes from Heartwood of Taiwania cryptomerioides Hayata
- Hydrothermolysis of Flavonoids in Relation to Steaming of Japanese Larch Wood
- Impact of Pulping Conditions on FORMACELL Aspen Lignin: Investigation of Methoxyl and Ester Groups, Carbohydrates, Molar Mass and Glass Transition Temperatures
- Ethanol-Enhanced Alkaline Pulping of Arundo donax L. Reed: Influence of Solvent on Pulp Yield and Quality
- Reflectance FTIR Microspectroscopy for Studying Effect of Xylan Removal on Unbleached and Bleached Birch Kraft Pulps
- Structure of Thermally Modified Wood Studied by Liquid State NMR Measurements
- Detection on Incipient Fungal Attack in Wood Using Magnetic Resonance Parameter Mapping Wood Studied by Liquid State NMR Measurements
- Wood Density Determination by X- and Gamma-Ray Tomography
- The Influence of Wood Specimen Surface Coating on Moisture Movement during Drying
- Study of the System Wood – Coating Material. Part 2.Wood – Solid Coating Material
- Flake Drying Temperature Affects Mat Properties during Pressing
