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Microbiological Quality Enhancement of Minimally-Processed Enoki Mushrooms Using Ozone and Organic Acids  

Park, Shin-Young (Department of Food Science and Technology, Chung-Ang University)
Yoo, Mi-Young (School of Biotechnology and Bioengineering, Kangwon National University)
Choi, Jae-Ho (School of Biotechnology and Bioengineering, Kangwon National University)
Ha, Sang-Do (Department of Food Science and Technology, Chung-Ang University)
Moon, Kwang-Deok (Department of Food Science and Technology, Kyeongbuk National University)
Oh, Deog-Hwan (School of Biotechnology and Bioengineering, Kangwon National University)
Publication Information
Food Science and Biotechnology / v.14, no.6, 2005 , pp. 803-807 More about this Journal
Abstract
This study examined the effects of ozone exposure alone (1, 3, and 5 ppm) as well as in combination with 1% acetic acid, citric acid, or lactic acid on the growth of indigenous microorganisms in enoki mushrooms. Populations of mesophilic bacteria, yeasts and molds in enoki mushrooms appeared to be decreased by stepwise increases in concentration (1 to 5 ppm) or exposure time (0.5 to 5 min) to ozone. Compared to untreated (control) enoki mushrooms, there were reductions of 1.03 to $2.61\;\log_{10}\;CFU/g$ in mesophilic bacteria and of 1.21 to $2.7\;\log_{10}\;CFU/g$ in yeasts and molds in all ozone- treated enoki mushrooms. Combination of 3 ppm ozone and 1% citric acid (p<0.05) synergistically brought about significant reductions in both mesophilic bacteria ($3.52\;\log_{10}\;CFU/g$) and fungi (yeasts and molds) ($2.77\;\log_{10}\;CFU/g$) from enoki mushrooms. The results of this study show that low concentrations of ozone inhibit indigenous microflora populations in enoki mushrooms. Combination treatments of 3 ppm ozone with 1% citric acid showed greater antimicrobial effectiveness than either 3 ppm ozone or 1% citric acid alone.
Keywords
ozone; acetic acid; citric acid; lactic acid; indigenous microflora;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
Times Cited By Web Of Science : 3  (Related Records In Web of Science)
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