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Optimization of Conditions for the Maximum Bacteriocin Production of Enterococcus faecium DB1 Using Response Surface Methodology
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 Title & Authors
Optimization of Conditions for the Maximum Bacteriocin Production of Enterococcus faecium DB1 Using Response Surface Methodology
Choi, Hye-Young; Kim, Joon-Soo; Kim, Wang-June;
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The bacteriocin-producing lactic acid bacteria Enterococcus faecium DB1 was isolated from Korean traditional gajami sikhae. Culture conditions were optimized by response surface methodology (RSM) to maximize bacteriocin DB1 production. E. faecium DB1 displayed the highest bacteriocin activity when grown in modified MRS medium containing sucrose, rather than glucose, as a carbon source. The effects of temperature, initial pH, and sucrose concentration were tested to determine the optimum conditions for maximum bacteriocin production by E. faecium DB1. A central composite design was used to control the three variables in the experiment. RSM revealed that the optimum values for bacteriocin production were 27.66 g/L sucrose, temperature of , and an initial pH of 6.54. A 2.08-fold increase in bacteriocin production was obtained with sucrose-containing MRS medium compared to production in standard MRS medium.
bacteriocin;Enterococcus faecium;gajami sikhae;optimization;response surface methodology;
 Cited by
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