| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
In the sterilization using discharge plasma including plasma medicine and water treatment, reactive species such as OH radicals are considered to cause the sterilization. However, the bactericidal effects by those short-lived reactive species including OH radicals have not been directly measured. In this study, we quantitatively measured the bactericidal effects by OH radicals, ozone, and H2O2 on Bacillus subtilis and Escherichia coli using the method we have developed, which selectively produces specific types of reactive species using photolysis by vacuum ultraviolet light. Then, we compared the bactericidal effects by OH, ozone, and H2O2, and the bactericidal effects on the two types of bacteria. In addition, we measured the densities of reactive species produced by this method to verify the reliability of the simulation which calculates the densities of reactive species of this method.
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