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http://dx.doi.org/10.3746/jkfn.2011.40.12.1781

Effect of Physicochemical Treatment on Growth Inhibition of Hanseniaspora uvarum Y1 from Yogurt  

SunWoo, Chan (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Lee, So-Young (Traditional Fermented Food Research Group, Korea Food Research Institute)
Yoon, So-Young (Food Research Center, CJ Research Institute)
Jung, Ji-Yeon (Food Research Center, CJ Research Institute)
Kim, Koth-Bong-Woo-Ri (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Lee, Chung-Jo (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Kwak, Ji-Hee (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Kim, Min-Ji (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Kim, Dong-Hyun (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Jung, Seul-A (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Kim, Hyun-Jee (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Ahn, Dong-Hyun (Dept. of Food Science & Technolog/ Institute of Food Science, Pukyong National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.40, no.12, 2011 , pp. 1781-1786 More about this Journal
Abstract
This study was conducted to investigate the cause of microbiological contamination in yogurt and evaluate the effect of physicochemical treatment on the growth inhibition of Hanseniaspora uvarum isolated from yogurt. The yeast strain Hanseniaspora uvarum Y1 was subjected to heat and pH treatments. H. uvarum Y1 was killed at $70^{\circ}C$ and $80^{\circ}C$ after 15 min and survived in a wide pH range from pH 2 to 9. However, it did not survive under pH 1 and over pH 10. In a disk diffusion susceptibility test on H. uvarum Y1, a clear zone (5 mm) of growth inhibition was observed upon treatment with electrolyzed water. The effect of ozone gas on the growth of H. uvarum Y1 was evaluated by viable cell count. Initial cell numbers of $10^2$ and $10^3$ CFU/mL of H. uvarum Y1 were completely killed by treatment for 10 and 30 min, respectively. H. uvarum Y1 was also sterilized by microwave treatment for 1 min. When treated with gamma-irradiation, the rate of killing of H. uvarum Y1 was proportional to the irradiation dose. and complete killing occurred at a dose of 50 kGy.
Keywords
yogurt; Hanseniaspora uvarum Y1; physicochemical treatments;
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Times Cited By KSCI : 16  (Citation Analysis)
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