方法对比
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| 克拉森木质素× | 木材收缩× | X射线密度测定法× | |
|---|---|---|---|
| 领域 | 林学 | 林学 | 林学 |
| 方法族 | Process / pipeline | Process / pipeline | Process / pipeline |
| 起源年份≠ | 1908 | 1950 | 2005 |
| 提出者≠ | Erik Klason | Carl Skaar | Gabriel Gazo |
| 类型≠ | chemical analysis | moisture response test | measurement method |
| 开创性文献≠ | TAPPI T222 om-15. (2015). Acid-insoluble lignin in wood and pulp. TAPPI Press. link ↗ | ASTM D143-19. (2019). Standard test methods for small clear specimens of timber. ASTM International. link ↗ | Hansmann, C., Wimmer, R., & Gindl, W. (2007). Assessing damage in wood-polymer composites by depth-sensing indentation. Composites Part A, 38(6), 1502–1508. link ↗ |
| 别名 | acid-insoluble lignin, lignin content | dimensional change, anisotropic shrinkage | wood density, radiography |
| 相关≠ | 3 | 2 | 3 |
| 摘要≠ | The Klason lignin method is a standard chemical test for quantifying the acid-insoluble lignin content in wood and plant biomass. Developed by Erik Klason in 1908, the method treats wood with sulfuric acid to dissolve carbohydrates (cellulose and hemicellulose) while leaving the acid-insoluble lignin residue. Klason lignin is widely used in wood science, pulp chemistry, and biomass characterization to assess wood composition and predict properties. | Wood shrinkage is the dimensional change that occurs as wood loses moisture from green (freshly felled) to oven-dry condition. Wood shrinks anisotropically: tangentially (along growth rings) more than radially (from center to edge), and both more than longitudinally (along the grain). Measuring shrinkage percentages is essential for understanding wood drying behavior, predicting checking and warping, and selecting materials for applications sensitive to dimensional change (flooring, cabinetry, musical instruments). | X-ray densitometry is a nondestructive method for measuring wood density, microdensity profiles, and ring-by-ring density variation in wood samples using X-ray image analysis. The method uses attenuation of X-rays passing through wood to quantify mass per unit volume. It enables rapid assessment of wood quality without destroying material, making it valuable for research, timber grading, and genetic selection programs. |
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