用x射线衍射法对棉纤维细胞壁的微原纤螺旋角和纤维素微晶相对取向指数在植株中的分布规律进行了研究。
The distribution of microfibril spiral angle and relative orientational index of cellulose crystallites in cotton fibre cell walls had been studied by X-ray diffraction analysis.
植原体是引起众多植物病害的一类重要的无细胞壁的原核致病菌，其寄主种类多、危害面积广，对经济、环境等影响严重。
Phytoplasmas are cell wall-less prokaryotic pathogens causing many plant diseases with various host plants, widely geographical distribution and adverse impacts on economics and environments.
原发后结核表现为肺上叶尖段、后段的，不均质的含空洞的实变影，呈厚的、结节样、不规则的壁；
Postprimary tuberculosis appears as upper lobe apical/posterior segment heterogenous consolidation with cavitation, with thick, nodular, and irregular walls.
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