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Pulsed electric field treatment of saccharomyces cerevisiae using different waveforms.
- Source :
-
IEEE Transactions on Dielectrics & Electrical Insulation . Aug2015, Vol. 22 Issue 4, p1841-1848. 8p. - Publication Year :
- 2015
-
Abstract
- Pulsed electric field (PEF) treatment can be used for non-thermal inactivation of microorganisms. The aim of this paper is to investigate PEF treatment of yeast, Saccharomyces cerevisiae, using three different field waveforms: square; non-oscillating exponential and oscillating exponential. The PEF system used in this paper consists of a pulsed power supply and a parallel-plane metallic electrodes treatment cell located in an air-pressurised chamber. PEF treatment of the yeast was conducted using electric field impulses with magnitudes of 67 kV/cm and 80 kV/cm. The efficacy of the PEF treatment for inactivation of the yeast cells was assessed by comparison of the PEFtreated and untreated yeast populations. Results showed that ~3-log10 reduction in the yeast population can be achieved with 100 impulses using all tested waveforms. Amongst all three tested waveforms non-oscillating exponential impulses demonstrated improved PEF performance. The effect of duration of treatment and peak magnitude of the field on the PEF process is discussed. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 10709878
- Volume :
- 22
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Dielectrics & Electrical Insulation
- Publication Type :
- Academic Journal
- Accession number :
- 108932813
- Full Text :
- https://doi.org/10.1109/TDEI.2015.005152