大功率电子加速器的辐射灭菌效果研究

在中国科学院近代物理研究所自行研制的大功率电子加速器上, 研究了不同辐照剂量的电子束对大肠杆菌、 金黄色葡萄球菌和变形杆菌3种微生物的杀灭效果, 同时检测了辐照后菌体超氧化物歧化酶（SOD）活性的变化。 结果显示: 辐照剂量达到2.0 kGy时, 可完全杀灭金黄色葡萄球菌, 2.2 kGy时可完全杀灭大肠杆菌和变形杆菌; 辐照对3种微生物的SOD活性有较显著的影响。 To study the effects of radiation sterilization of the electron beam, the three species of microorganisms, Escherichia. coli, Staphylococcus aureus and Proteus vulgaris were irradiated with the electron beam, delivered by the electron accelerator independently developed by the Institute of Modern Physics, Chinese Academy of Sciences, and the changes of superoxide dismutase (SOD) activity of these irradiated microorganisms were also tested. The results indicated that the Staphylococcus aureus were fully radio sterilized with the radiation dosage of 2.0 kGy, but 2.2 kGy to the Escherichia.coli and Proteus vulgaris. Moreover, the data also demonstrated that the irradiation had noticeable effects on the SOD activity of the three microorganisms.