离子束辐照脱氧核糖核酸(DNA)及其碱基的ESR研究  

ESR study on ion-beam irradiated DNA and its basses

作　　者：邓建国[1] 余增亮[1] 邱励俭[1] 

机构地区：[1]中国科学院等离子体研究所,合肥230031

出　　处：《核技术》1992年第10期601-605,共5页Nuclear Techniques

基　　金：国家自然科学基金

摘　　要：用电子自旋共振波谱法对氮离子束辐照脱氧核糖核酸和碱基产生的自由基进行了研究。结果表明,离子束辐照DNA和碱基产生的自由基为离子自由基;自由基产额随辐照剂量的增加而上升,最终趋于饱和。在室温(10-20℃)和干燥条件下,对产生的自由基进行了一个多月的观测,不见有大幅度衰减,表明在室温条件下辐照产生的自由基具有较长的寿命。The radicals induced by nitrogen ion beam irradiating UNA and its bases have been studied with ESR method. The experimental results show that the induced radicals at room temperature are ionic. Concentrations of the radicals for different samples increase with increasing ion dose. Various samples have been tested with ESR method during the stored time of more than one month under the dry conditions at room temperature (10-20℃), no big change was observed for the radicals, showing a quite long life.

关 键 词：碱基 ESR 离子束 辐照 DNA 

分 类 号：Q523.06[生物学—生物化学]