木材の收縮膨脹に関する異方性の原因に就て : (第IV報) 射出線と異方性收縮

概要

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In this report, the following correlations are investigated by the method of small samples ; ray-volume (V_R) and shrinkage (α_t, α_r) in the transverse section of wood, ray-volume (V_R) and anisotropic grade (α_t/α_r) of shrinkage in the section, and area (S) of attached surface of ray knd tracheid each other and radial shrinkage (α_r) of wood. The results are obtained about the normal sap-wood of single Sugi (Cryptomeria japonica DON.)-bole (statistically the population) are as follows (cf. Table 5);(a) Correlation of V_R for α_t/α_r is as small as negligible, but it is not said that correlation is no existence at all (0.13≦ρ≦0.75 D.C. 95%).(b) The checking activity of ray for α_r is negligible.(c) The correlation-coefficient of V_R forα_r is positive (0.06≦ρ≦0.73 D.C. 95%).It seems to be the result of numbers of cell walls in tangential direction increased by the presence of wood rays.
一般社団法人日本森林学会の論文
1953-02-25