Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Stability and Gastric Acid Resistance of Lactobacilli and Bifidobacteria in Commercial Yogurts

시판 요구르트 중 Lactobacilli 및 Bifidobacteria의 안정성 및 내산성 연구

  • Published : 1999.03.01
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Abstract

Stability and gastric acid resistance of Lactobacilli and Bifidobacteria in commercial yogurts were invcstigated. It was noted that there was significant differences of stability and gastric acid resistance among yo-wts. The sutvival of Lactobacilli and B#idohacleria in commercial yogurts decreased as a function of time during storage and showed in the range of $10^7$-$10^8$ cfulml. The lower the pH was, the lower survival of Lactobacillus and B~dobaclerium was observed. The survival of Lactobacillz and Bifidobacteria in three yogurts appeared to be $10^3$-10$^4$ cfuIml. In the case of yogurt containing Bifidobncterza- loaded capsules, the gastric acid resistance of the Rifidobncteria was greatly enhanced and the survival after treatment in a gastric juice for 120 min was over 10' cfulml.

시판 요구르트 제품중 Lactobacilli 및 Bifidobacteria 의 안정성과 내산성을 비교 고찰하였다. 요구르트 제품중 Lactobacilli 및 Bifidobacteria 의 안정성 및 내산성은 제품들간에 큰 차이가 있음을 고찰하였다. 요구르트 제품중 Lactobacilli 및 Bifidobacteria 의 생존률은 저장중 시간이 지남에 따라 점차 감소하였으나 $10^7$-$10^8$ cfu/ml로의 생존률을 나타내었다. 요구르트 제품중 Lactobacilli 및 Bifidobacteria의 생존률은 pH가 낮아짐에 따라 점차로 감소하였다. 인공위액에서 2시간 노출시킨 후 Lactobacilli 및 Bifidobacteria의 생존률은 3개의 제품에서 $10^3$-$10^4$ cfu/ml 이상이었으나 캡슐제품에 함유된 Bifidobacteria 의 생존률은 $10^8$cfu/ml 이상으로 크게 향상되었다.

Keywords

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