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Changes in Total Glucosinolates Levels and Physico-Chemical Properties of Kimchi using Korean Chinese Cabbage of Harvest Time according to Various Storage Conditions  

Jung, Ji-In (Department of Food and Nutrition, Duksung Women's University)
Hong, Eun-Young (Department of Food and Nutrition, Duksung Women's University)
Kim, Mee-Kyung (Department of Food and Nutrition, Duksung Women's University)
Jung, Ji-Won (Food R&D, CJ CheilJedang Corporation)
Oh, Ji-Young (Food R&D, CJ CheilJedang Corporation)
Kwon, Min-Soo (Food R&D, CJ CheilJedang Corporation)
Lee, Kang-Pyo (Food R&D, CJ CheilJedang Corporation)
Kim, Gun-Hee (Department of Food and Nutrition, Duksung Women's University)
Publication Information
Food Science and Preservation / v.16, no.5, 2009 , pp. 612-617 More about this Journal
Abstract
Kimchi is a traditional pickled food using Korean Chinese cabbage(Brassica campestris var. pekinensis) and also containing phytochemicals, glucosinolates. This study was carried out to investigate the changes in the total glucosinolates levels of Kimchi using Korean Chinese cabbage of harvest time(June-July, August-September, October-November, December-April, May) according to storage temperature(4, 10, $15^{\circ}C$) and storage duration(0, 1, 3, 5, 7, 10, 14, 21 and 28 day). For determination of glucosinolates, 50g of Baechu kimchi was used for analytical sample preparation provided with an anion exchanges column and measured by UV-visible Spectrophotometer. The highest contents of water occurred at August-September during fermentation. At 15, 10, $4^{\circ}C$, the pH in all of seasonal variation of Baechu kimchi declined, especially from 0 to 3 days at $15^{\circ}C$, from 0 to 7 days at $10^{\circ}C$ and from 0 to 14 days at $4^{\circ}C$. At that storage, the total glucosinolates levels in all of seasonal variation of Kimchi declined in storage temperature. Baechu kimchi at August-September showed the highest total glucosinolates levels. Also total glucosinolates levels decreased as storage period increased. Baechu kimchi fermented at $15^{\circ}C$ for 7days decreased rapidly and reached to the lowest at the 1day(ranged from $10.3{\pm}0.70$ to $23.4{\pm}0.37{\mu}mol/g$ dry weight). At $10^{\circ}C$ for 14days were ranged from $12.9{\pm}0.29$ to $33.7{\pm}1.81{\mu}mol/g$ dry weight before fermentation and decreased rapidly at the 3day(ranged from $9.5{\pm}0.54$ to $20.5{\pm}0.61{\mu}mol/g$ dry weight). Total glucosinolates levels of Baechu kimchi fermented at $4^{\circ}C$ for 28days decreased rapidly during 7day(ranged from $9.9{\pm}0.78$ to $21.1{\pm}0.96{\mu}mol/g$ dry weight) and then slowly decreased. Therefore the total glucosinolates levels decreased during storage time and depended on harvest time and storage conditions of Kimchi.
Keywords
Korean Chinese cabbage; Kimchi; total glucosinolates; harvest time; storage conditions;
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