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学科主题: 口腔医学
题名:
Inactivation of Bacteria in an Aqueous Environment by a Direct-Current, Cold-Atmospheric-Pressure Air Plasma Microjet
作者: Liu, Fuxiang1,2; Sun, Peng1; Bai, Na1,2; Tian, Ye1,2; Zhou, Haixia1,2; Wei, Shicheng1,3; Zhou, Yanheng1,3; Zhang, Jue1; Zhu, Weidong; Becker, Kurt4; Fang, Jing1
关键词: bacteria ; cell membranes ; cold plasma ; plasma microjets
刊名: PLASMA PROCESSES AND POLYMERS
发表日期: 2010-03-22
DOI: 10.1002/ppap.200900070
卷: 7, 期:3-4, 页:231-236
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Physics, Applied ; Physics, Fluids & Plasmas ; Physics, Condensed Matter ; Polymer Science
研究领域[WOS]: Physics ; Polymer Science
关键词[WOS]: GLOW
英文摘要:

A direct-current, cold-atmospheric-pressure air plasma microjet (PMJ) sustained in a quasi-steady gas cavity in a liquid medium is used to inactivate Staphylococcus aureus (S. aureus) suspended in the liquid. The temperature and the pH value of the liquid change to steady-state values of about 40 degrees C and 3.0-4.5, respectively, after 10 min of plasma treatment. The decrease in the pH is attributed to the reaction of NO(x) produced in the air plasma with water at the gas-liquid interface. The concentrations of NO(3)(-) and NO(2)(-) are measured to be 37 mg.L(-1) and 21 mg.L(-1), respectively, after a 20 min of plasma treatment. Effective inactivation of S. aureus is found to start after the pH values decreases to about 4.5. This is attributed to the high oxidizing potential of the perhydroxyl radical (HOO(center dot)) on the fatty acid in the cell membranes of the microorganisms in the liquid.

语种: 英语
所属项目编号: 2009DFB30370 ; FA9550-08-1-0332
项目资助者: Bioelectrics Inc. (U.S.A.) ; Peking University Biomed-X Foundation ; China International Science and Technology Cooperation ; U.S. Air Force Office of Scientific Research (AFOSR)
WOS记录号: WOS:000276547700005
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/57535
Appears in Collections:北京大学口腔医学院_期刊论文

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作者单位: 1.Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
2.Sichuan Univ, W China Coll Stomatol, Chengdu 610064, Peoples R China
3.Peking Univ, Sch Stomatol, Beijing 100871, Peoples R China
4.NYU, Dept Phys, Polytech Inst, New York, NY 10003 USA

Recommended Citation:
Liu, Fuxiang,Sun, Peng,Bai, Na,et al. Inactivation of Bacteria in an Aqueous Environment by a Direct-Current, Cold-Atmospheric-Pressure Air Plasma Microjet[J]. PLASMA PROCESSES AND POLYMERS,2010,7(3-4):231-236.
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