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首页> 外文期刊>IAWA Journal >Ultrastructural X-ray scattering studies of tropical and temperate hardwoods used as tonewoods
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Ultrastructural X-ray scattering studies of tropical and temperate hardwoods used as tonewoods

机译：超微结构的X射线散射研究，热带和温带硬木用作基础

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摘要

The structure of hardwoods representing eight tropical and five temperate species was characterized from the atomistic level up to the cellular level using X-ray scattering, X-ray microtomography and light microscopy. The species were chosen for this study based on their popularity as tonewoods. The ultrastructure of wood cell walls, including crystallite size, orientation and close-range order of cellulose microfibrils were determined by small- and wide-angle X-ray scattering (SAXS, WAXS). The SAXS patterns were interpreted by using an analytical model of cylinden packed in a hexagonal close-range order with paracrystalline distortion. The values for the cylinder diameters given by this model were compared to the average crystallite widths obtained by WAXS using the Scherrer equation. In six out of z6 samples, all of these representing tropical species used especially in fretboard parts of electric guitars, large differences between these two sizes were obtained. The WAXS and microscopy results of these samples corresponded to tension wood structures. These comparisons and interpretations of SAXS results have not been previously presented for any tropical hardwoods, especially related to those containing tension wood tissue. The importance of the ultrastructural characterization was highlighted in this study in the case of tropical hardwood samples.
机译：代表八个热带和五种温度物种的硬木结构从使用X射线散射，X射线显微镜图和光学显微镜从原子水平的原子水平表征。根据他们作为科西伍德的普及，为本研究选择了该研究。通过小型和广角X射线散射（棕褐色，蜡）测定木细胞壁的超微结构，包括微晶尺寸，取向和纤维素微纤维的近距离阶数。通过使用用旁边的近距离变形的六边形近距离顺序填充填充的圆柱甘柱的分析模型来解释萨克斯模式。将该模型给出的气缸直径的值与使用Scherrer方程通过蜡获得的平均晶形宽度进行比较。在Z6样品中的六个中，所有这些代表了用于电吉他的胎板部​​分的热带物种，获得了这两种尺寸之间的大差异。这些样品的蜡和显微镜结果对应于张力木结构。这些比较和萨克斯结果的解释尚未出现任何热带硬木，特别是与含有张力木组织那些相关的。在本研究中强调了超微结构表征的重要性在热带硬木样本的情况下。

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