Images of biological samples undergoing sterilization by a glow discharge at atmospheric pressure

Author

Laroussi, Mounir ; Sayler, Gary S. ; Glascock, Battle B. ; McCurdy, Bruce ; Pearce, Mary E. ; Bright, Nathan G. ; Malott, Chad M.

Author_Institution

Appl. Res. Center, Old Dominion Univ., Newport News, VA, USA

Volume

27

Issue

1

fYear

1999

fDate

2/1/1999 12:00:00 AM

Firstpage

34

Lastpage

35

Abstract

Among the various industrial uses of the glow discharge at atmospheric pressure (GDAP), biological applications such as sterilization are under investigation. In this paper, we present images of a liquid medium (Luria-Bertani broth with tetracycline) contaminated by Escherichia coli bacteria (strain PER 322) undergoing plasma treatment. In most cases, it is found that an exposure time of two to 20 minutes leads to nearly a complete kill of a 10⁸/ml E. coli population. The treatment time necessary to obtain a complete kill depends on the plasma power density, the type of gas used, the type of bacteria, and the type of medium

Keywords

biological techniques; glow discharges; microorganisms; plasma applications; plasma pressure; E. coli population; Escherichia coli bacteria; Luria-Bertani broth; atmospheric pressure; bacteria; biological applications; biological samples; complete kill; exposure time; gas; glow discharge; liquid medium; plasma power density; plasma treatment; sterilization; strain PER 322; tetracycline; treatment time; Atmospheric-pressure plasmas; Dielectrics; Electrodes; Glow discharges; Helium; Microorganisms; Plasma applications; Plasma density; Plasma temperature; Voltage;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.763016

Filename

763016