Abstract
The aim of this study was to evaluate the effect of argon plasma jet, generated at atmospheric pressure, on Aspergillus sp. The molds were isolated from commercial white bread and inoculated on potato dextrose agar (PDA) containing 10% tartaric acid. The atmospheric pressure plasma jet (APPJ) was generated at a high frequency (43 kHz) power of 10, 20, or 30W and applied to the inoculated molds on PDA for 5, 10, or 20 minutes. The PDA plates were incubated for 3 and 6 days and the fungal inactivation was investigated directly under light microscope and indirectly by comparing the fungal dry weights. The results indicated that higher power supply and longer plasma exposure time led to more reduction in the fungal dry weight. The APPJ appears to be effective in destroying Aspergillus sp., yet the optimal plasma treatment condition remains to be optimized.
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