低能离子对番茄果皮刻蚀与穿透作用的研究  

STUDY ON ETCHING AND PENETRATING OF LOW ENERGY IONS INTO TOMATO PEEL

作　　者：韩建伟[1] 余增亮[1] 

机构地区：[1]中国科学院等离子体物理研究所

出　　处：《生物物理学报》1998年第4期757-761,共5页Acta Biophysica Sinica

基　　金：国家自然科学基金

摘　　要：测量了５０μｍ厚的干燥番茄果皮的α粒子透射能谱，表明其具有疏松的结构，仅等效于约１６μｍ厚的致密物质（如Ｍｙｌａｒ膜）。经１×１０１７离子／ｃｍ２的３０ｋｅＶＮ＋离子辐照后，番茄果皮的透射能谱中出现了完全自由通过的α粒子。研究了低能离子辐照等效生物材料丙氨酸的质量损失和Ｍｙｌａｒ膜的α粒子透射能谱，并结合理论分析揭示了低能离子能够通过多种作用方式刻蚀生物样品。也就是说低能离子辐照使得疏松的作物组织出现渐深的完全畅通的孔道，使后续的部分离子能够达到更深的组织中去，造成独特的低能离子辐照生物效应。The α particle transmission spectra of dry tomato peel of 50 μm thickness have been measured. It showed that the tomato peel has non-uniform and loose structure, and is only equivalent to about 16 μm thickness of compact material such as Mylar foil. After 1×1017 ions/cm2 30 keV N+ions implantation, some completely free α particles emerged in the spectrum. The mass loss of alanine and α particle transmission spectra for Mylar foils have been studied. Based on the experimental results and theoretical analysis, the etching process of biological materials by low energy ions was disclosed. It demonstrated that after high dose of low energy ions etching some latter ions could pass through the free pathway formed previously to deeper tissue to produce unique biological effects.

关 键 词：低能离子辐照 番茄 果皮 丙氨酸 Mylar膜 

分 类 号：Q947[生物学—植物学] S641.201[农业科学—蔬菜学]