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http://dx.doi.org/10.4014/mbl.1411.11001

Effect of Electrolyzed Water and Hot-Air-Drying with UV for the Reduction of Microbial Populations of Undaria pinnatifida  

Bark, Si-Woo (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Kim, Koth-Bong-Woo-Ri (Institute of Fisheries Sciences, Pukyong National University)
Kim, Min-Ji (Institute of Fisheries Sciences, Pukyong National University)
Kang, Bo-Kyeong (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Pak, Won-Min (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Kim, Bo-Ram (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Ahn, Na-Kyung (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Choi, Yeon-Uk (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Cho, Young-Je (School of Food Science of Biotechnology, Kyungpook National University)
Ahn, Dong-Hyun (Department of Food Science & Technology/Institute of Food Science, Pukyong National University)
Publication Information
Microbiology and Biotechnology Letters / v.43, no.1, 2015 , pp. 38-44 More about this Journal
Abstract
This study was conducted to investigate the effects of electrolyzed water (EW) and hot-air-drying with ultraviolet light (UV) to reduce coliform bacteria of Undaria pinnatifida (UP). The UP was washed in the order of 15% EW, tap water (TW), and distilled water (DW) under following conditions: 15% EW for 10 min (washing: 1 time), TW for 1 min, and DW for 10 min (washing: 5 times). Viable cells, coliform, and mold counts were at 102-103 CFU/g in untreated samples. After EW treatment, viable cells, coliform, and molds were not detected in whole samples or on the surface of UP. But, after hot-air-drying at 48°C for 48 h, the number of viable cells, coliform, and molds were 101-105 CFU/g. After hot-air-drying at 48°C for 48 h with UV (12-48 h), viable cells, coliform, and molds were not detected in whole samples or on the surface of UP. In respect of color value, there were no significant changes. In sensory evaluation, the UP with hot-air-drying with UV (12 h) had the highest score in overall preference among UV treatment groups. These results suggest that the treatments at 15% EW for 10 min and hot-air-drying at 48°C for 48 h with UV (12 h) were effective to reduce coliform bacteria of the dried Undaria pinnatifida.
Keywords
Undaria pinnatifida; quality; ultraviolet; electrolyzed water; coliform bacteria;
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Times Cited By KSCI : 4  (Citation Analysis)
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