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Plasma sterilization of Geobacillus Stearothermophilus by O2:N2 RF inductively coupled plasma

Published online by Cambridge University Press:  04 May 2006

O. Kylián ,
T. Sasaki  and
F. Rossi
O. Kylián
Affiliation:
European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Via E. Fermi 1, 21020 Ispra, Italy
T. Sasaki
Affiliation:
European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Via E. Fermi 1, 21020 Ispra, Italy
F. Rossi*
Affiliation:
European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Via E. Fermi 1, 21020 Ispra, Italy
*
[email protected]
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Abstract

The aim of this work is to identify the main process responsible for sterilization of Geobacillus Stearothermophilus spores in O2:N2 RF inductively coupled plasma. In order to meet this objective the sterilization efficiencies of discharges in mixtures differing in the initial O2/N2 ratios are compared with plasma properties and with scanning electron microscopy images of treated spores. According to the obtained results it can be concluded that under our experimental conditions the time needed to reach complete sterilization is more related to O atom density than UV radiation intensity, i.e. complete sterilization is not related only to DNA damage as in UV sterilization but more likely to the etching of the spore.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 34 , Issue 2: 15th International Colloquium on Plasma processes (CIP 2005) , May 2006 , pp. 139 - 142
Copyright
© EDP Sciences, 2006

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