Improved method based on dual-energy X-ray absorptiometry for nondestructive evaluation of solid wood moisture content
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Takashi Tanaka
Abstract
An accurate, rapid, and convenient method is presented for moisture content (MC) determination of solid wood based on dual-energy X-ray absorptiometry (DXA). Poly(methyl methacrylate)-equivalent thicknesses (PMMA-EThs) of sugi (Cryptomeria japonica D. Don) wood blocks and pure water were measured by means of a wide range of X-ray tube voltages (20–100 kV). The ratio of the PMMA-ETh of pure water to that of wood decreased as X-ray tube voltage was increased, suggesting that an appropriate pair of tube voltages for DXA is 20 and 100 kV. According to this result, X-ray images of 30 wood samples were taken at 20- and 100-kV tube voltages, and their average PMMA-Eths from both images was determined. There was a strong negative correlation between the wet-basis MC of the wood sample and the ratio of its PMMA-Eth at 100 kV to that at 20 kV. A regression equation was developed for estimating the dry-basis MC of wood samples from their PMMA-ETh ratios. The standard error of estimate was 2.2%, which is better than those determined for electric moisture meters. This approach may lead to the development of a practical, nondestructive moisture meter for wood.
Acknowledgments
This work was supported by JSPS KAKENHI (grant no. 24780170). I am grateful for the advice and expertise of Dr. Yasuo Kawai at Akita Prefectural University.
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Articles in the same Issue
- Frontmatter
- Original Articles
- Cloning and expression of a sesquiterpene synthase gene from Taiwania cryptomerioides
- Stabilization, degradation, and dissolution behavior of Scots pine polysaccharides during polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) pulping
- Swelling, viscoelastic, and anatomical studies on ionic liquid-swollen Norway spruce as a screening tool toward ionosolv pulping
- Synthesis and antifungal activity of dehydroabietic acid-based thiadiazole-phosphonates
- Nanofibrillation of TEMPO-oxidized bleached hardwood kraft cellulose at high solids content
- Free radical gelling reactions of lignosulfonates
- Preparation of electrode for electric double layer capacitor from electrospun lignin fibers
- Standard and non-standard deformation behaviour of European beech and Norway spruce during compression
- Determination of log moisture content using ground penetrating radar (GPR). Part 1. Partial least squares (PLS) method
- Determination of log moisture content using ground penetrating radar (GPR). Part 2. Propagation velocity (PV) method
- Improved method based on dual-energy X-ray absorptiometry for nondestructive evaluation of solid wood moisture content
- A comparative study of dewatering of Pinus radiata sapwood using supercritical CO2 and conventional forced air-drying via in situ magnetic resonance microimaging (MRI)
- Influence of exposure time, wood species and dimension on the remaining copper and chromium content in CC-treated wood after field and laboratory leaching tests
Articles in the same Issue
- Frontmatter
- Original Articles
- Cloning and expression of a sesquiterpene synthase gene from Taiwania cryptomerioides
- Stabilization, degradation, and dissolution behavior of Scots pine polysaccharides during polysulfide (K-PS) and polysulfide anthraquinone (K-PSAQ) pulping
- Swelling, viscoelastic, and anatomical studies on ionic liquid-swollen Norway spruce as a screening tool toward ionosolv pulping
- Synthesis and antifungal activity of dehydroabietic acid-based thiadiazole-phosphonates
- Nanofibrillation of TEMPO-oxidized bleached hardwood kraft cellulose at high solids content
- Free radical gelling reactions of lignosulfonates
- Preparation of electrode for electric double layer capacitor from electrospun lignin fibers
- Standard and non-standard deformation behaviour of European beech and Norway spruce during compression
- Determination of log moisture content using ground penetrating radar (GPR). Part 1. Partial least squares (PLS) method
- Determination of log moisture content using ground penetrating radar (GPR). Part 2. Propagation velocity (PV) method
- Improved method based on dual-energy X-ray absorptiometry for nondestructive evaluation of solid wood moisture content
- A comparative study of dewatering of Pinus radiata sapwood using supercritical CO2 and conventional forced air-drying via in situ magnetic resonance microimaging (MRI)
- Influence of exposure time, wood species and dimension on the remaining copper and chromium content in CC-treated wood after field and laboratory leaching tests
