2024-03-29T15:51:48Z
https://u-ryukyu.repo.nii.ac.jp/oai
oai:u-ryukyu.repo.nii.ac.jp:02002956
2022-10-31T01:12:27Z
1642837622505:1642837905044:1642837915094
1642838403551:1642838407312
破壊した木材の細胞の変形(林学科)
Deformation of cell wall in failure wood (Department of Forestry)
林, 弘也
遠山, 隆幸
仲田, 真
Hayashi, Hiroya
Tohyama, Takayuki
Nakata, Sin
open access
繊維軸方向に圧縮荷重を受けた木材の仮道管壁のSlip planeを観察し, 次の結果を得た。1.Slip planeは単壁型と両壁型があり, 単壁型は3型式, 両壁型は2型式ある。2.早材部仮道管壁には主に両壁型Slip planeが生じ, 晩材部仮道管壁には主に単壁型Slip planeが生じる。3.放射組織に接する仮道管壁のSlip plane数は放射組織に接しない仮道管壁のSlip plane数とほぼ同数であるが, 晩材部では放射組織に接しない仮道管壁のSlip plane数が多い傾向にあった。4.放射組織の上下にある仮道管壁は多数のSlip planeを生じるが, Slip planeの数は放射組織からの距離とともに指数関数的に減少し, 一般の仮道管壁と同じになる。5.圧縮荷重が小さい場合は, 放射組織に接する仮道管壁のSlip plane数は放射組織に接しない仮道管壁のSlip plane数よりも多く, 放射組織の上下端にある放射柔細胞に接する仮道管壁に最も多くのSlip planeを生じる。6.Slip planeは細胞壁内の構造変化であるが, 仮道管内腔表面に変形を生じる場合もあることが認められた。
The influence of early and late wood and ray on slip planes in tangential tracheid walls of SUGI-wood (Cryptomeria japonica), which was subjected to longitudinal compression, was studied with the polarizing microscope. The number of slip planes was much the same number in one growth ring of failed wood. But the slip planes of tracheid walls in contact with a ray were more nurmerous than the slip planes in other tracheid walls at low levels of load to the failure load. According to the slip plane classification, the slip planes of single wall type were developed mainly in late wood and the slip planes of double wall type were developed mainly in early wood. The ray significantly influenced the occurance of slip planes. Slip planes were preferentially developed at the traheid walls near the ray margin, which were not in contact with a ray. The distance from ray margin, where slip planes developed preferentially, was longer in early wood than in late wood. At low levels of load, slip planes developed preferentially at the tracheid walls in contact with the most upper or the most lower parenchyma cells of a ray. Survey with the electron microscope demonstrated that slip planes of S I and D I were the stage shifting from the dislocation in a cell wall to the deformation of cell wall surface.
紀要論文
琉球大学農学部
1986-12-05
jpn
departmental bulletin paper
VoR
http://hdl.handle.net/20.500.12000/3927
http://hdl.handle.net/20.500.12000/3927
https://u-ryukyu.repo.nii.ac.jp/records/2002956
0370-4246
AN00250548
琉球大学農学部学術報告
The Science Bulletin of the Faculty of Agriculture. University of the Ryukyus
33
221
227
https://u-ryukyu.repo.nii.ac.jp/record/2002956/files/KJ00000162269.pdf