摘要
低能离子注入和UV辐射经真空处理的白色链霉菌均表现出了复杂的生物学效应。探讨了低能离子注入白色链霉菌产生的“马鞍型”注量效应曲线的形成原因。实验结果表明真空因素不是“马鞍型”注量效应曲线形成的原因,推测“马鞍型”注量效应曲线是低剂量辐射产生的HRS/IRR效应。低剂量UV辐照经真空处理的白色链霉菌仅能表现出IRR效应,同时也表现出兴奋效应(存活率>100%)。以抗链霉素突变为指标研究低能离子注入和UV辐射白色链霉菌的诱变效果的结果表明,UV是致白色链霉菌产生抗链霉素突变的有效手段。
The results of bothplicate biological effects. The30 keV N^＋ ion implantation and UV irradiation of Streptomyces albus showed complicate biological effects. The “saddle shape” pattern of the dose -dependent curve formed by N^＋ ion implantation with low energy was studied, and it proved that vacuum was not the reason, and in fact, the “saddle shape”curve may be regarded as a HRS/IRR （hyper-radiosensitivity / increased radiaoresistance） effect caused by low dose irradiation.But Streptomyces albus UV irradiated after vacuum treatment only showed IRR effect or hormesis （survival rate 〉100%）. The streptomycin resistance mutation of Streptomyces albus caused by low energy N^＋ ion implantation and UV irradiation was also studied. The results showed that UV radiation is one effective means for streptomyces albus breeding.
出处
《核技术》
EI
CAS
CSCD
北大核心
2005年第8期598-602,共5页
Nuclear Techniques
