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http://dx.doi.org/10.9721/KJFST.2013.45.6.735

Microbial Decontamination of Vegetables and Spices Using Cold Plasma Treatments  

Kim, Jung Eun (Department of Food Science and Technology, Seoul Women's University)
Kim, In-Hah (Department of Food Science and Technology, Seoul Women's University)
Min, Sea C. (Department of Food Science and Technology, Seoul Women's University)
Publication Information
Korean Journal of Food Science and Technology / v.45, no.6, 2013 , pp. 735-741 More about this Journal
Abstract
Effects of cold plasma treatment (CPT) against Salmonella Typhimurium inoculated on cabbage and lettuce, naturally occurring bacteria in black pepper powder and red pepper powder, and Bacillus cereus inoculated onto red pepper powder were investigated. The numbers of S. Typhimurium on cabbage and lettuce were reduced by $1.5{\pm}0.2CFU/cm^2$ (900W, 5 min) and $1.1{\pm}0.1$ log $CFU/cm^2$ (900W, 10 min), respectively. The numbers of naturally occurring aerobic bacteria in both black pepper powder and red pepper powder were reduced by $2.3{\pm}0.3$ and $0.6{\pm}0.2$ log CFU/g, respectively. The numbers of B. cereus vegetative cells on red pepper powder were reduced by $1.5{\pm}0.1$ log CFU/g, but the numbers of spores remained unchanged. The inhibition of S. Typhimurium on cabbage was adequately described by Fermi's model and the Weibull model. The predicted optimum treatment power and time for S. Typhimurium inoculated onto cabbage were 746 W and 6.8 min, respectively. Our results indicate that CPT represents a useful method for microbial decontamination of vegetables and spices.
Keywords
nonthermal processing; cold plasma; vegetable; spice; food safety;
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