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Changes of isoflavones and fatty acids in Eoyukjang, a traditional Korean fermented soysauce prepared under the ground in a pot or an incubator

Title
Changes of isoflavones and fatty acids in Eoyukjang, a traditional Korean fermented soysauce prepared under the ground in a pot or an incubator
Authors
Park Y.Lee S.Chang P.-S.Lee J.-M.Kim Y.S.Lee J.
Ewha Authors
이종미김영석
SCOPUS Author ID
이종미scopus; 김영석scopus
Issue Date
2009
Journal Title
Food Science and Biotechnology
ISSN
1226-7708JCR Link
Citation
vol. 18, no. 1, pp. 48 - 52
Indexed
SCIE; SCOPUS; KCI WOS scopus
Abstract
Eoyukjang is a traditional Korean sauce made of cooked soypaste or meju supplemented with fish and meats at least 1 year of fermentation period. Eoyukjang was recovered according to the traditional method and stored under the ground in a pot without plastic packaging (13G: 13 month fermentation under the ground) or in an incubator wrapped with plastic packaging (6I, 12I, and 18I: 6, 12, and 18 month fermentation, respectively). Distribution of isoflavones and fatty acids were monitored by high performance liquid chromatography (HPLC) and gas chromatography (GC), respectively. Total isoflavones in 13G, 6I, 12I, and 18I were 3.792, 0.387, 0.460, and 0.510 μmol/g, respectively. Samples of 13G had at least 8.24 times higher isoflavone contents than samples from 12I. Aglycones were the major isoflavones in eoyukjang and were found more than 92% in 13G and 39-63% in incubated samples. In fatty acid analysis, the ratios of unsaturated to saturated fatty acids from 13G were higher than those from 6I, 12I, and 18I. Traditional fermentation methods using a pot may allow more migration of air and moisture than samples wrapped with plastic packaging, which caused the difference in the distribution of isoflavones and fatty acids. © The Korean Society of Food Science and Technology.
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신산업융합대학 > 식품영양학과 > Journal papers
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