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首页> 外文期刊>Journal of Applied Physics >Dielectric barrier discharge plasma treatment on E. coli: Influence of CH_4/N_2, O_2, N_2/O_2, N_2, and Ar gases
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Dielectric barrier discharge plasma treatment on E. coli: Influence of CH_4/N_2, O_2, N_2/O_2, N_2, and Ar gases

机译：电介质阻挡放电等离子体处理对大肠杆菌的影响：CH_4 / N_2，O_2，N_2 / O_2，N_2和Ar气体的影响

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摘要

Atmospheric pressure dielectric barrier discharge (DBD) plasma has been employed on Gram-negative bacteria, Escherichia coli BL21. Treatment was carried out using plasma generated with different compositions of gases: CH_4/N_2 (1:2), O_2, N_2/O_2 (1:1), N_2, and Ar, and by varying plasma power and treatment time. E. coli cells were exposed under the DBD plasma in triplicates, and their surviving numbers were observed in terms of colony forming units. It has been observed that the CH_4/N_2 plasma exhibits relatively higher sterilization property toward E. coli compared to plasma generated by using O_2, N_2/O_2, N_2, and Ar gas mixtures. The time to kill up to 90% of the initial population of the E. coli cells was found to be about 2-3 min for CH_4/N_2 and O_2 gas mixture DBD plasma. A prolongation of treatment time and an increase in the dissipated power significantly improved the E. coli killing efficiency of the atmospheric pressure DBD plasma.
机译：大气压介电势垒放电（DBD）等离子体已用于革兰氏阴性细菌大肠杆菌BL21。使用由不同气体组成的等离子体（CH_4 / N_2（1：2），O_2，N_2 / O_2（1：1），N_2和Ar）生成等离子体，并通过改变等离子体功率和处理时间来进行处理。将大肠杆菌细胞一式三份暴露于DBD血浆下，并以菌落形成单位观察其存活数。已经观察到，与通过使用O_2，N_2 / O_2，N_2和Ar气体混合物产生的血浆相比，CH_4 / N_2血浆对大肠杆菌表现出相对较高的灭菌性能。对于CH_4 / N_2和O_2气体混合物DBD血浆，杀死多达90％的大肠杆菌初始种群的时间约为2-3分钟。处理时间的延长和耗散功率的增加显着改善了大气压DBD血浆的大肠杆菌杀灭效率。

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  • 来源
    《Journal of Applied Physics》 |2009年第8期|084701.1-084701.5|共5页
  • 作者

    Abhijit Majumdar; Rajesh Kumar Singh; Gottfried J. Palm; Rainer Hippler;

  • 作者单位

    Institute for Physics, Ernst-Moritz-Arndt-University Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany;

    Institute for Biochemistry, Ernst-Moritz-Arndt-University Greifswald, Felix-Hausdorff-Str. 4, 17489 Greifswald, Germany Biochemical Engineering Group, Chemical Engineering Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, India;

    Institute for Biochemistry, Ernst-Moritz-Arndt-University Greifswald, Felix-Hausdorff-Str. 4, 17489 Greifswald, Germany;

    Institute for Physics, Ernst-Moritz-Arndt-University Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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