This study was conducted to develop a model to describe the effect of antimicrobials [potassium sorbate (PS),potassium lactate (PL), and combined PL and sodium diacetate (SDA, PLSDA)] on the growth parameters of Listeriamonocytogenes such as specific growth rate (SGR) and lag phase periods (LT) in air-dried raw sausages as a function ofstorage temperature (4, 10, 16, and 25oC). Results showed that the SGR of L. monocytogenes was dependent on the storagetemperature and level of antimicrobials used. The most effective treatment was the 4% PLSDA, followed by the 2% PLSDAand 4% PL and 0.2% PS exhibited the least antimicrobial effect. Increased growth rates were observed with increasing storagetemperatures from 4 to 25oC. The growth data were fitted with a Gompertz equation to determine the SGR and LT of the L.monocytogenes. Six polynomial models were developed for the SGR and LT to evaluate the effect of PS (0.1, 0.2%) and PL(2, 4%) alone and PLSDA (2, 4%) on the growth kinetics of L. monocytogenes from 4 to 25oC.
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Abstract Introduction Materials and Methods Results and Discussion Acknowledgments References
Woo-Suk Bang [ Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi 456-756, Korea ]
Hyun-Jung Chung [ Department of Food Nutrition, College of Human Ecology, Inha University, Incheon, Gyeonggi 402-751, Korea ]
Sung-Sik Jin [ Departmenet of Food Science and Biotechnology, Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon 200-701, Korea ]
Tian Ding [ Departmenet of Food Science and Biotechnology, Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon 200-701, Korea ]
In-Gyun Hwang [ Department of Food Microbiology, Korea Food & Drug Administration, Seoul 122-704, Korea ]
Gun-Jo Woo [ Division of Food Bioscience and Technology, Korea University, Seoul 136-701, Korea ]
Sang-Do Ha [ Department of Food Science and Technology, Chung-Ang University, Anseong, Gyeonggi 456-756, Korea ]
Gyung-Jin Bahk [ Department of Food Science and Nutrition, Kunsan National University, Gunsan, Jeonbuk 573-701, Korea ]
Deog-Hwan Oh [ Departmenet of Food Science and Biotechnology, Institute of Bioscience and Biotechnology, Kangwon National University, Chuncheon, Gangwon 200-701, Korea ]
Corresponding author