Sterilization effect of nitrogen oxide radicals generated by microwave plasma using air

Tomomasa Itarashiki, Nobuya Hayashi, Akira Yonesu

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Plasma sterilization has attracted attention as a safe and low cost sterilization method compared to conventional sterilization methods such as EOG (ethylene oxide gas) sterilization and high-pressure steam sterilization. In this research, a plasma is generated by irradiating air with microwaves. Sterilization is caused by 0-radicals and NO-radicals. In order to carry out sterilization efficiently, optimal setting of equipment conditions is required. The pressure required for optimal conditions of the equipment, the microwave output, and the equipment used have been examined. A biological indicator (BI), Geobacillus stearothermophilus (ATCC7953), was used. It was found that sterilization was successful when the pressure in the vacuum chamber for microwave output of 280 W was 60 Pa.

    Original languageEnglish
    Pages (from-to)213-216
    Number of pages4
    JournalVacuum
    Volume110
    DOIs
    Publication statusPublished - Dec 2014

    All Science Journal Classification (ASJC) codes

    • Instrumentation
    • Condensed Matter Physics
    • Surfaces, Coatings and Films

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