Study of the permeability of tomato pericarp etched by low-energy ion beams based on alpha-particles Irradiation

文献类型： 外文期刊

第一作者： Zhang, Lili

作者： Zhang, Lili;Chen, Lianyun;Huang, Qing;Wu, Yuejin;Xu, Xue

作者机构：

关键词： low-energy ion beams;tomato pericarp;alpha particles;transmission spectrum

期刊名称：BIOTECHNOLOGY AND BIOPROCESS ENGINEERING （ 影响因子：2.836； 五年影响因子：2.281 ）

ISSN： 1226-8372

年卷期： 2013 年 18 卷 3 期

页码：

收录情况： SCI

摘要： Low-energy ion beam bio-technology has been applied in the biological field and has gained remarkable success in crop and microbe breeding. However, to understand how low-energy ion beams interact with biological materials remains a challenge for researchers who work for the development of ion-beam bio-technology. In this work, tomato pericarp was used as the target sample to study the effect of ion beams on the permeability of biological objects. A series of experiments were conducted via irradiating tomato pericarp samples with low-energy (10 keV similar to 25 keV) ion beams followed by measuring the pericarp's permeability using transmissive alpha particles. The transmissive spectra of alpha particles and the measurement of the tip number in CR39 gave a quantitative evaluation of the sputtering effect caused by low-energy ions. Meanwhile, natural red dye was used to examine the permeability of irradiated tomato pericarp samples. It was found that the sputtering effect is not only proportional to the ion energy and dose, but dependent on the ion type as well. The damage caused by Ar ions due to sputtering was much more severe than that caused by N ions sputtering with the same dose. Therefore, this study not only demonstrates the permeability difference of biological membranes before and after ion irradiation, but also provides the information on how to optimize the experimental conditions for application of the low-energy ion beam in biology.

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