Study on Inactivation Mechanism of an Atmospheric DBD Plasma Jet using Escherichia coli Mutants

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2013/04/01

タイトル(英語): Study on Inactivation Mechanism of an Atmospheric DBD Plasma Jet using Escherichia coli Mutants

著者名: Jia Li (Department of Energy Sciences, Tokyo Institute of Technology), Natsuko Sakai (Department of Energy Sciences, Tokyo Institute of Technology), Masato Watanabe (Department of Energy Sciences, Tokyo Institute of Technology), Eiki Hotta (Department of

著者名(英語): Jia Li (Department of Energy Sciences, Tokyo Institute of Technology), Natsuko Sakai (Department of Energy Sciences, Tokyo Institute of Technology), Masato Watanabe (Department of Energy Sciences, Tokyo Institute of Technology), Eiki Hotta (Department of Energy Sciences, Tokyo Institute of Technology), Masaaki Wachi (Department of Bioengineering, Tokyo Institute of Technology)

キーワード: DBD plasma jet，inactivation，Escherichia coli mutant

要約(英語): Inactivation mechanism was investigated using biological method in an atmospheric pressure plasma jet with a plane-to-plane DBD structure. This plasma jet, fed by helium/oxygen gas, was operated by a sub-microsecond pulsed voltage with a repetition rate of 1-10kHz range. The electrical property of the discharge was studied by means of a classical DBD model. The optical property was analyzed by spectroscopy. Escherichia coli K-12 strains, MG1655, BW25113 and CSH26 with their mutants, totally 8 kinds of bacteria, were employed to separate various bactericidal plasma agents. Results showed that oxidative stress and charged species are playing the most significant roles in inactivation process, which was also verified by the indirect inactivation experiments with mesh insertion. Rather than the superoxide O2-, neutral reactive oxygen species like O3 and metastable state O2* were identified as dominant sources for oxidative stress.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.133 No.4 （2013） 特集：平成24 年基礎・材料・共通部門大会

本誌掲載ページ: 192-197 p

原稿種別: 論文／英語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/133/4/133_192/_article/-char/ja/