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Growth Inhibition of Yeast Isolated from Processed Rice Cake with Ethanol and Organic Acids  

Kim, Jong-Shin (Department of Food Science and Biotechnology, Kyungwon University)
Lee, Hyun-Jun (Department of Food Science and Biotechnology, Kyungwon University)
Lee, Young-Tack (Department of Food Science and Biotechnology, Kyungwon University)
Chang, Hak-Gil (Department of Food Science and Biotechnology, Kyungwon University)
Park, Jong-Hyun (Department of Food Science and Biotechnology, Kyungwon University)
Publication Information
Journal of Food Hygiene and Safety / v.22, no.2, 2007 , pp. 99-104 More about this Journal
Abstract
To defend putrifaction of the processed rice cake from gas-forming yeast during storage and distribution it needed to reduce and remove them. The sanitizers of ethanol and organic acids were applied on Pichia anomala, Candida tropicalis, and isolated yeasts from the putrified cut rice cake. Although growth inhibition effect by the sanitizer of 20% ethanol, 1% acetic acid, or 1% lactic acid respectively were very low, the combined sanitizer of 20% ethanol and 1% acetic acid, or 1% lactic acid showed very high sterilizing effect toward the yeasts. Six log cfu/ml of the yeast was reduced with this combined sanitizers for 30 minutes. In addition, the combined sanitizer heated from 20 to $50^{\circ}C$ had more the increased sterility. Therefore, the sanitizer of the combined ethanol with the acetic acid or the lactic acid for 30 minutes at $50^{\circ}C$ might reduce or sterilize the putrifying yeast at the processed rice cake. The result might be also applied to the effective pre-treatment of many agricultural food stuffs, against yeast, especially unsterilized stuffs, without any hazards from the special sanitizers and nutritional loss from harsh sterilization.
Keywords
ethanol; acetic acid; lactic acid; sanitizer; yeast; processed rice cake;
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Times Cited By KSCI : 4  (Citation Analysis)
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