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자료유형
학술저널
저자정보
저널정보
한국식품영양과학회 Journal of Food Science and Nutrition Journal of Food Science and Nutrition Vol.10 No.4
발행연도
2005.12
수록면
333 - 339 (7page)

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Three lactobacillus strains, two from infant feces, and one from cow's milk, were selected among 172 isolates, from multiple sources, for further study based on the antimicrobial activities against six strains of pathogenic bacteria and identified as Lactobacillus acidophilus. The strains revealed a wide scope of spectrum against pathogenic bacteria. Viable Lactobacillus acidophilus KH-1 cell counts at pH 2.0 were slightly decreased to 1.42×10^7 CFU/mL from 4.18×10^7 CFU/mL, while remaining at 3.42×10^7 CFU/mL at pH 4.0 with the survival rate of 33.97% and 81.82%, respectively. At the concentration of 0.1% oxgall, L. acidophilus KH-1 kept growing up to 3.12×10^7 CFU/mL with a mean growth rate constant (k) of 0.25, and cell number was slightly decreased to 1.21×10^7 CFU/mL (k=0.19) with 0.3% oxgall, but remained at 7.6×10^6 CFU/mL (k=0.17) with 0.5% oxgall. L. acidophilus KH-1 had a D_(60) value of 7.14, with viable cell numbers 1.4×10^5 CFU/mL after heat treatment at 60℃ for 30 minutes. Stability of L. acidophilus KH-1 at -20℃ was significantly higher, when the strain was cultivated under the optimum growth temperature (54.41% and 54.35%) than at the temperature (13.53%).

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Abstract

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

ACKNOWLEDGEMENTS

REFERENCES

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