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http://dx.doi.org/10.3746/jkfn.2011.40.8.1157

Growth Inhibition against Contaminants in Aseptic Chocolate Milk Using Physicochemical Methods  

Choi, Moon-Kyoung (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Yoon, So-Young (CJ Food Research Center)
Lee, So-Young (Traditional Food Research Group, Korea Food Research Institute)
Kim, Koth-Bong-Woo-Ri (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Lee, Chung-Jo (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Jung, Ji-Yeon (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Kwak, Ji-Hee (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Kim, Min-Ji (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Kim, Dong-Hyun (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
SunWoo, Chan (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Lee, Ju-Woon (Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute)
Byun, Myung-Woo (Dept. of Culinary Nutrition, Woosong University)
Ahn, Dong-Hyun (Dept. of Food Science & Technology/ Institute of Food Science, Pukyong National University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.40, no.8, 2011 , pp. 1157-1163 More about this Journal
Abstract
This study was conducted to investigate the cause of microbiological contaminants in aseptic chocolate milk and evaluate the effect of a physicochemical treatment on the growth inhibition of isolated bacterial strains. The bacterium isolated from aseptic chocolate milk was identified as Bacillus lentus and was named B. lentus M1. In the heat and pH treatment, the growth of B. lentus was inhibited at 110$^{\circ}C$ for >15 min and at pH's <5 and >10. An electrolyzed water treatment against B. lentus M1, revealed 5 mm growth past the inhibition zone. The effect of ozone gas on B. lentus M1 growth was evaluated using viable cell counts. When the initial number of B. lentus M1 was $10^2$ and $10^3$ CFU, the bacteria were completely suppressed by ozone gas treatment for 10 and 30 min, respectively. In a microwave treatment, B. lentus M1 was sterilized following microwave treatment for 1 min. As the result of ${\gamma}$-irradiation against B. lentus M1, numbers decreased as the ${\gamma}$-irradiation dosage increased. These results show the growth inhibition effects against contaminants in aseptic chocolate milk using physicochemical treatments.
Keywords
aseptic chocolate milk; Bacillus lentus M1; physicochemical treatment;
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Times Cited By KSCI : 15  (Citation Analysis)
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