Generation of Oxygen Plasma using Plasma-based Ion Implantation and its Application to Sterilization of Spore-forming Bacteria

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  • Fujimura Nobuyuki
    Major in Electrical and Electronic Engineering, Graduate School of Science and Technology, Hiroshima Institute of Technology
  • Shimono Kazuhiro
    Major in Electrical and Electronic Engineering, Graduate School of Science and Technology, Hiroshima Institute of Technology
  • Kubo Masatoshi
    Department of Applied Information Science, Faculty of Applied Information Science, Hiroshima Institute of Technology
  • Noguchi Hiromitsu
    Major in Electrical and Electronic Engineering, Graduate School of Science and Technology, Hiroshima Institute of Technology
  • Toyota Hiroshi
    Department of Electronics and Computer Engineering, Faculty of Engineering, Hiroshima Institute of Technology
  • Kakugawa Koji
    Department of Food Science and Biotechnology, Faculty of Life Sciences, Hiroshima Institute of Technology
  • Tanaka Takeshi
    Department of Electronics and Computer Engineering, Faculty of Engineering, Hiroshima Institute of Technology

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Other Title
  • プラズマベースイオン注入法を用いた酸素プラズマの生成と耐熱性芽胞菌の殺菌への応用
  • プラズマベースイオン チュウニュウホウ オ モチイタ サンソ プラズマ ノ セイセイ ト タイネツセイ ガホウキン ノ サッキン エ ノ オウヨウ

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Abstract

As a sterilization technique, the hydrogen peroxide plasma sterilization is generally used. The hydrogen peroxide plasma sterilization can not be used in food sterilization for the use of toxic hydrogen peroxide. Example of other sterilization techniques, the atmospheric pressure plasma sterilization has been attempted. By the way, studies have been attempted for application to sterilization techniques of PBII technology. Application to medical equipment is considered, because it uses harmless nitrogen or oxygen gas to sterilization using PBII. Sterilization using PBII is possible processing a short time at low temperatures.  In this study, using the PBII sterilization technique using a harmless gas, the authors tried the application to the sterilization of food. Therefore, the authors examined the plasma generation technology suitable for the sterilization process by the measurement of the spectrum. Increase in the number of ions in the plasma was observed with the combination of RF burst plasma and self-ignited plasma. The authors evaluated sterilization processing by the number of living bacteria of the spore bearing bacterium about only self-ignition plasma and the combination of RF burst plasma and self-ignited plasma.

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