Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface

© 2017 Elsevier GmbH Bacterial inactivation by discharge plasma is affected by many factors including gas type. No uniform conclusion for the effect of working gas type on the inactivation efficiency has been reached until now. In this work, the gas type and composition (O 2 , N 2 and air) on the in...

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Main Authors: Zhigang Ke, Prutchayawoot Thopan, Greg Fridman, Vandana Miller, Liangdeng Yu, Alexander Fridman, Qing Huang
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/43458
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-434582018-04-25T07:35:30Z Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface Zhigang Ke Prutchayawoot Thopan Greg Fridman Vandana Miller Liangdeng Yu Alexander Fridman Qing Huang Agricultural and Biological Sciences Arts and Humanities © 2017 Elsevier GmbH Bacterial inactivation by discharge plasma is affected by many factors including gas type. No uniform conclusion for the effect of working gas type on the inactivation efficiency has been reached until now. In this work, the gas type and composition (O 2 , N 2 and air) on the inactivation efficiency of Escherichia coli by corona discharge plasma at the gas-solution interface produced using needle high-voltage electrode above the liquid were systemically investigated. It was found that air plasma had strong sterilization capability, followed by N 2 plasma, while O 2 plasma had the lowest sterilization capability. The reason for the gas type and composition to influence the sterilization capability was due to that they influenced the nitrite production in solution which further reacted with plasma-produced H 2 O 2 in acidified medium to form a strong oxidant peroxynitrite. The produced peroxynitrite could damage both the membrane and DNA, especially the former, and consequently inactivate the bacteria lethally. 2018-01-24T03:48:49Z 2018-01-24T03:48:49Z 2017-12-01 Journal 22128166 2-s2.0-85034759677 10.1016/j.cpme.2017.05.001 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85034759677&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/43458
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Agricultural and Biological Sciences
Arts and Humanities
spellingShingle Agricultural and Biological Sciences
Arts and Humanities
Zhigang Ke
Prutchayawoot Thopan
Greg Fridman
Vandana Miller
Liangdeng Yu
Alexander Fridman
Qing Huang
Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
description © 2017 Elsevier GmbH Bacterial inactivation by discharge plasma is affected by many factors including gas type. No uniform conclusion for the effect of working gas type on the inactivation efficiency has been reached until now. In this work, the gas type and composition (O 2 , N 2 and air) on the inactivation efficiency of Escherichia coli by corona discharge plasma at the gas-solution interface produced using needle high-voltage electrode above the liquid were systemically investigated. It was found that air plasma had strong sterilization capability, followed by N 2 plasma, while O 2 plasma had the lowest sterilization capability. The reason for the gas type and composition to influence the sterilization capability was due to that they influenced the nitrite production in solution which further reacted with plasma-produced H 2 O 2 in acidified medium to form a strong oxidant peroxynitrite. The produced peroxynitrite could damage both the membrane and DNA, especially the former, and consequently inactivate the bacteria lethally.
format Journal
author Zhigang Ke
Prutchayawoot Thopan
Greg Fridman
Vandana Miller
Liangdeng Yu
Alexander Fridman
Qing Huang
author_facet Zhigang Ke
Prutchayawoot Thopan
Greg Fridman
Vandana Miller
Liangdeng Yu
Alexander Fridman
Qing Huang
author_sort Zhigang Ke
title Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
title_short Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
title_full Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
title_fullStr Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
title_full_unstemmed Effect of N<inf>2</inf>/O<inf>2</inf>composition on inactivation efficiency of Escherichia coli by discharge plasma at the gas-solution interface
title_sort effect of n<inf>2</inf>/o<inf>2</inf>composition on inactivation efficiency of escherichia coli by discharge plasma at the gas-solution interface
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85034759677&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/43458
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