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Abstract ▼ AI-Helper

This study was carried out to investigate the effect of potassium sorbate on the growth of yogurt starter and contaminant yeast. Yogurt starter was isolated using 9 company of market yogurt and 10 strains of contaminant yeast was isolated in swollen yogurt after incubated for 7 days at $25^{\ci...

This study was carried out to investigate the effect of potassium sorbate on the growth of yogurt starter and contaminant yeast. Yogurt starter was isolated using 9 company of market yogurt and 10 strains of contaminant yeast was isolated in swollen yogurt after incubated for 7 days at $25^{\circ}C.$ The growth of isolated starter was inhibited by 0.3% of potassium sorbate except starter-H. Most isolated yeast was inhibited by the 0.1% of potassium sorbate. The growth of yeast-9 was the most inhibited among isolated yeast. The growth of selected starter-H was similiar to that of control in MRS broth containing 0.3% of potassium sorbate. 0.3% of potassium sorbate did not affect the growth of selected starter-H incubated with selected yeast-9 in skimmilk at $37^{\circ}C$ for 48hr, whereas, the growth of yeast-9 did not occur during incubation. The viable cell change of starter-H in yogurt contaminated with selected yeast-9 was not observed at $4{\pm}1{\circ}C$ for 7 days and the contaminant inhibited in 0.3% potassium sorbate containing yogurt during storage at $25^{\circ}C.$

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