SEM-EDXA法测定分析柠檬桉木材中的晶体  

Distribution of crystals in Eucalyptus citriodora using scanning electron microscopy and energy dispersive X-ray analysis (SEM-EDXA)

作　　者：杨燕[1] 邱坚[1] 

机构地区：[1]西南林学院木质科学与装饰工程学院,云南昆明650224

出　　处：《浙江林学院学报》2008年第2期143-147,共5页Journal of Zhejiang Forestry College

基　　金：国家自然科学基金资助项目(30471357);云南省自然科学基金资助项目(2003C0050M);生物质材料科学与技术教育部重点实验室2004年度开放课题基金资助项目;中国博士后基金2006年第39批一等资助项目;云南省中青年学术技术带头人后备人才基金资助项目(2006PY01-19)

摘　　要：采用扫描电子显微镜-X射线能量散射分析（SEM—EDXA）法对柠檬桉Eucalyptus citriodora木材中晶体的轴向分布、径向分布、形态和含量以及硅石的纳米结构进行了分析。结果表明：①柠檬桉木材中晶体主要分布在木射线细胞，形态多为菱形晶体；②柠檬桉木材钙元素含量高的可达所有元素含量的22％以上；③柠檬桉木材中晶体的纳米尺寸在350～400nm，晶体尺寸大小从树基向树梢呈递减趋势。The distribution, morphology, content, and nanostructure of crystals in axial and radial distributions of Eucalyptus citriodora were studied using Scanning Electron Microscopy and Energy Dispersive X-Ray Analysis （SEM-EDXA）. The samples were 30-year-old trees, having 30 annual rings, 20 -23 cm of diameter at breast height. The results were as follows ： （ 1 ） crystals were mainly deposited in the ray cells and had a diamond shape; （2）elemental Ca content was above 22%; and （3）crystals in E. citriodora were between 350 to 400 nm decreasing gradually from the lower part of the tree to the upper part. [ Ch, 4 fig. 1 tab. 9 ref. ]

关 键 词：林业工程 晶体 柠檬桉木材 扫描电镜-X射线能谱法 形态 分布 

分 类 号：S781.1[农业科学—木材科学与技术]