Sterilization characteristics of narrow tubing by nitrogen oxides generated in atmospheric pressure air plasma

IR (HANDLE) Open Access
  • Muto, Reona
    Interdisciplinary Graduate School of Engineering Sciences, Department of Advanced Energy Engineering Science, Kyushu University
  • Hayashi, Nobuya
    Interdisciplinary Graduate School of Engineering Sciences, Department of Advanced Energy Engineering Science, Kyushu University International Research Center for Space and Planetary Environmental Science, Kyushu University

Description

The sterilization characteristics of active species generated by an atmospheric dielectric barrier discharge plasma using air and oxygen at the inner surface of silicone tubing were investigated. A dielectric barrier discharge torch plasma device was installed at one end of the tube and generated long-lived active species that flowed into the tube. A strip-type biological indicator with a 10^v5-cell bacterial spore was placed at the opposite end of the 60 cm tube. Sterilization was completed within 30 min by active particles generated from the air plasma. The main factors contributing to the sterilization by air plasma were HNO_3 and N2O5. When organic materials (keratin, aspartic acid, and dipicolinic acid) reflecting components of the bacterial spore, were treated by the sterilization procedure there was little effect on dipicolinic acid. Keratin was oxidized by ozone and N_Ox generated from the oxygen and air plasmas, respectively. Aspartic acid underwent little change in composition from ozone generated from the oxygen plasma, whereas nitro (NO_2), nitroso (NO), and aldehyde (CHO) groups were formed from ozone and NOx generated from the air plasma.

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Details 詳細情報について

  • CRID
    1050299981545209472
  • ISSN
    20452322
  • HANDLE
    2324/7174438
  • Text Lang
    en
  • Article Type
    journal article
  • Data Source
    • IRDB

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