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Comparison of fracture morphologies of ring shake surface and shear surface in Dahurian larch
Wood Science and Technology ( IF 3.4 ) Pub Date : 2021-08-30 , DOI: 10.1007/s00226-021-01324-3
Seong Hyun Kim 1 , Jong Ho Kim 1 , Intan Fajar Suri 1 , Go Un Yang 1 , Seung Hwan Lee 1 , Nam Hun Kim 1 , Byantara Darsan Purusatama 2 , Fauzi Febrianto 3
Affiliation  

To understand the mechanism of ring shakes in Dahurian larch (Larix gmelinii), the ring shake surface on the tangential section was observed and compared with the shear surface of green and air-dry wood. Macroscopically, the ring shakes occurred in the heartwood between the 20th and 40th growth ring. The ring shake surface exhibited an even and clean structure without the fluff. The shear surface of the green wood showed a larger amount of fluff compared to that of air-dry wood. In microscopy, ring shake failure occurred at the end of the latewood and/or the beginning of earlywood or within the earlywood zone. The ring shake surface was covered with a resinous substance, and the wood cells were observed after removing the resinous substance with ethanol. The tracheid walls in the ring shake and shear surface of green wood primarily exhibited intercell failure and rarely intrawall and transwall failures. In air-dry wood, the tracheid walls in the shear surface mostly exhibited intrawall and transwall failures. In the ring shake surface, there was hardly any failure in the epithelial and ray cells, thereby showing a distinct difference compared to the shear surface of the green and air-dry woods.



中文翻译:

大胡连落叶松环震面与剪切面断裂形态比较

了解落叶松 ( Larix gmelinii)的环震机制),观察切向截面上的环形振动面,并与生坯和风干木材的剪切面进行比较。宏观上,在第 20 和 40 年轮之间的心材发生年轮抖动。环摇表面呈现均匀、干净的结构,没有绒毛。与风干木材相比,生坯的剪切面显示出更多的绒毛。在显微镜下,环摇破坏发生在晚材的末端和/或早材的开始或早材区内。振铃表面覆盖有树脂物质,用乙醇去除树脂物质后观察木细胞。生木环震和剪切面的管胞壁主要表现为胞间破坏,很少出现壁内和跨壁破坏。在风干的木材中,剪切面的管胞壁主要表现为壁内和跨壁破坏。在环摇面上,上皮细胞和射线细胞几乎没有任何失效,因此与生坯和风干木材的剪切面相比显示出明显的差异。

更新日期:2021-08-30
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