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Sterilization of dental bacteria in a N2-O2 microwaves post-discharge, at low pressure: influence of temperature

Published online by Cambridge University Press:  11 May 2004

S. Villeger ,
A. Ricard  and
M. Sixou
S. Villeger*
Affiliation:
CPAT, University Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France
A. Ricard
Affiliation:
CPAT, University Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France
M. Sixou
Affiliation:
GREMI, University Paul Sabatier, 118 route de Narbonne, 31062 Toulouse, France
*
[email protected]
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Abstract

Recently, plasmas have been largely studied to develop a new cold and safe sterilization process. The plasma efficiency on bacteria destruction has been proved at low or near atmospheric pressure. In our investigation we used a N2-O2 post discharge at low pressure, where the experimental conditions allowing the optimal production of active species have been determined: 100 Watt, 1 Ln.min−1, 5 Torr. By exposing E. coli to these plasma conditions, it is demonstrated a synergy of N and O active atoms on substrate temperature: a reduction of 6 log was achieved after a treatment time of 20 minutes at 80 °C and of 12 log after 5 minutes at 120 °C.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 26 , Issue 3: 14th International Colloquium on Plasma Processes (CIP 2003) , June 2004 , pp. 203 - 208
Copyright
© EDP Sciences, 2004

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