초록

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Abstract ▼ AI-Helper

This study was carried out to compare lactic acid bacteria count of liquid type yogurts with various experimental conditions during shelf-life period. The conditions were media(BCP and Elliker agar), incubation conditions(aerobic and anaerobic), dilution waters(saline and phosphate buffer) and dilut...

This study was carried out to compare lactic acid bacteria count of liquid type yogurts with various experimental conditions during shelf-life period. The conditions were media(BCP and Elliker agar), incubation conditions(aerobic and anaerobic), dilution waters(saline and phosphate buffer) and dilution methods(10 and 100 times). All of the samples were incubated at $37^{\circ}C$ for 72 hrs. In the case of counting L. acidophilus as a yogurt starter culture, there were differences on dilution waters and incubation conditions, but were no difference on media and dilution methods. In the case of counting L jugurti and mixed strain with L. acidophilus and L. casei, there were differences on media, incubation conditions and dilution waters, but was no difference on dilution methods. For L. casei in the yogurt, media and dilution methods were shown slightly different viable cell count but incubation conditions were not shown difference. In the case of counting L. bulgaricus, there were differences on media, incubation conditions and dilution methods, but was no difference on dilution waters. Therefore, the measurment of lactic acid bacteria count may be effective if preferred experimental conditions are selected for different types of strain.

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