人工控制水化学条件下培养的鲤鱼耳石微观形貌的SEM观察  

SEM observation of carp otolith raised under controlled water conditions

作　　者：高永华[1] 冯庆玲[1] 李卓[1] 金哲辉[1] 

机构地区：[1]清华大学材料科学与工程系,先进材料教育部重点实验室,北京100084

出　　处：《复合材料学报》2008年第6期118-122,共5页Acta Materiae Compositae Sinica

基　　金：国家重点基础研究发展计划(973计划)基金(2007CB815604);国家自然科学基金(50672052)

摘　　要：鱼耳石是一种典型的由碳酸钙和有机质构成的天然生物材料。为了查明其微观形貌特征,作者对实验室不同水介质条件下养殖鲤鱼的未经处理、经过碱洗和Na2EDTA处理及经过打磨后再经碱洗和Na2EDTA处理的耳石样品分别进行了SEM观察。结果表明,组成微耳石的文石呈六边形或假六边形有规则排布成板片状或者柱状;星耳石则由球状或豆状的球文石晶体组成。对耳石进行打磨抛光再利用NaOH和Na2EDTA处理表面后,不仅可以更加清晰地观察到耳石的晶体形态,还能够较清楚地分辩其日轮,日轮宽度约为2μm^3μm。不同水化学条件下耳石的晶体微形貌特征差异并不大,初步推断,水体中的元素含量差异对耳石晶体形态的影响并不显著。Otolith is a typical biomaterial which is composed of calcium carbonate and organic matrix. In order to study the micro-morphology of otolith, SEM observation was taken under different water conditions and of several treatment method otoliths. The otolith samples included fresh otoliths, alkali treated otoliths, Na2 EDTA treated otolith, and sliced otoliths under alkali and Na2 EDTA treatment. The result shows the lapillus is composed of hexagon or sham-hexagon aragonite which formed sheet or cylindrical structure, while asteriscus is composed of ball or bean- shaped vaterite crystal. The polished otolith which was dealt with NaOH and Na2 EDTA can be distinguished as the crystal structure. The width of the daily increment is 2 μm- 3μm. The crystal structure of otoliths in different conditions show little difference, and as could be preliminarily inferred, the element content in water makes little effects on the crystal structure of otolith.

关 键 词：鱼耳石 微观形貌 日轮 SEM 水化学 

分 类 号：O741[理学—晶体学]