Evaluating growth strain of Eucalyptus globulus Labill. from SilviScan measurements
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Jun Li Yang
Abstract
Longitudinal surface strain was measured or estimated using three different methods along the stems of nine trees of 10-year-old Eucalyptus globulus Labill. Wood samples were collected close to the location where the strain was measured or estimated. Microfibril angle (MFA), cellulose crystallite width (Wcryst), microdensity and Young's modulus along the grain (EL) were determined using the SilviScan-2 technology at high spatial resolution. Relationships of measured strain and estimated strain to wood properties were established. The quality of the relationships depends on a particular wood property. Strain was more closely related to mean Wcryst than to any other wood properties. Its relationship with MFA was the next closest. Based on the results of regression analysis, we propose that Wcryst may be suitable for the prediction of surface strain at a moderate level of reliability. Adding measurement of MFA, microdensity and EL does not significantly improve the prediction quality. The strain measurement method also affects the results. The best relationships were obtained with longitudinal displacement measured by the CIRAD method. Strain measured by the strain gauge method gave weak relationships, possibly owing to variation in the cambium age of the specimens.
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©2006 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- A report from the 2005 Japanese-European Workshop on “Cellulose and Functional Polysaccharides”
- Determination of substituent distribution of viscoses by GPC
- Direct investigation of the structural properties of tension wood cellulose microfibrils using microbeam X-ray fibre diffraction
- Influence of amide content on the crystal structure of chitin
- Stepwise synthesis of chitooligosaccharides through a transition-state analogue substrate catalyzed by mutants of chitinase A1 from Bacillus circulans WL-12
- Synthesis of plantamajoside, a bioactive dihydroxyphenylethyl glycoside from Plantago major L.
- Diffusion of sulfide into Southern pine (Pinus taeda L.) and sweetgum (Liquidambar styraciflua L.) particles and chips
- Laccase-catalysed functionalisation of TMP with tyramine
- Wood liquefaction by ionic liquids
- Studies on the dehydrogenative polymerizations of monolignol β-glycosides. Part 2: Horseradish peroxidase-catalyzed dehydrogenative polymerization of isoconiferin
- Phenolic compounds in silver birch (Betula pendula Roth) wood
- Analysis of fragrance compositions of precious coniferous woods grown in Taiwan
- Influences of hot pressing temperature and surface structure on VOC emissions from OSB made of Scots pine
- Dimensional stability and photostability of octanoylated wood
- Measurement of the shear modulus of wood by the square-plate twist method
- Dielectric relaxation of water adsorbed on chemically treated woods
- Influences of drying on internal checking of spruce (Picea abies L.) heat-treated at 212°C
- The role of resol fortifiers in latex wood adhesives
- A simple anisotropy correction procedure for acoustic wood tomography
- Evaluating growth strain of Eucalyptus globulus Labill. from SilviScan measurements
- Density assessment of radiata pine: Sampling strategy revisited
