Title :
Decontamination of Surfaces From Extremophile Organisms Using Nonthermal Atmospheric-Pressure Plasmas
Author :
Cooper, Moogega ; Fridman, Gregory ; Staack, David ; Gutsol, Alexander F. ; Vasilets, Victor N. ; Anandan, Shivanthi ; Cho, Young I. ; Fridman, Alexander ; Tsapin, Alexander
Author_Institution :
Dept. of Mech. Eng. & Mech., Drexel Univ., Philadelphia, PA
fDate :
6/1/2009 12:00:00 AM
Abstract :
We showed that nonthermal dielectric barrier discharge (DBD) plasma compromises the integrity of the cell membrane of Deinococcus radiodurans, an extremophile organism. In samples of D. radiodurans, which were dried in a laminar flow hood, we observe that DBD plasma exposure resulted in a six-log reduction in CFU (colony-forming unit) count after 30 min of treatment. When the Deinococcus radiodurans cells were suspended in distilled water and treated, it took only 15 s to achieve a four-log reduction of CFU count.
Keywords :
biological fluid dynamics; biomembranes; cellular biophysics; discharges (electric); laminar flow; plasma applications; suspensions; Deinococcus radiodurans; cell membrane; colony-forming unit; distilled water; extremophile organisms; four-log reduction; laminar flow hood; nonthermal atmospheric-pressure plasmas; nonthermal dielectric barrier discharge plasma; six-log reduction; surface decontamination; suspension; time 15 s; time 30 min; Atmospheric-pressure discharges; cold plasma; dielectric barrier discharges (DBDs); plasma decontamination; sterilization;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2008.2010618
