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http://dx.doi.org/10.3746/jkfn.2016.45.9.1302

Effects of Amount and Type of Jeotgal, a Traditional Korean Salted and Fermented Seafood, on N-Nitrosodimethylamine Formation during Storage of Kimchi  

Kang, Kyung Hun (Department of Seafood Science and Technology, Institute of Marine Industry)
Kim, Sung Hyun (World Institute of Kimchi)
Kim, Sang-Hyun (College of Veterinary Medicine, Gyeongsang National University)
Kim, Jeong Gyun (Department of Seafood Science and Technology, Institute of Marine Industry)
Sung, Nak-Ju (Department of Food Science and Nutrition, Gyeongsang National University)
Lee, Soo-Jung (Department of Food Science and Nutrition, Gyeongsang National University)
Chung, Mi Ja (Department of Food Science and Nutrition, Gwangju University)
Publication Information
Journal of the Korean Society of Food Science and Nutrition / v.45, no.9, 2016 , pp. 1302-1309 More about this Journal
Abstract
N-Nitrosodimethylamine (NDMA) is formed through reactions between dimethylamine (DMA) and nitrite. Jeotgal, a traditional Korean salted and fermented seafood, contains a large amount of DMA and is an ingredient of kimchi condiment. This study investigated the effects of amount and type of Jeotgal on changes in NDMA and its precursor contents during storage of kimchi. NDMA was found in all 23 Jeotgal samples, and DMA in nine salted and fermented shrimp samples showed levels ranging from 16.5 to 58.9 mg/kg (average of 30.9 mg/kg). The seven salted and fermented anchovy juice samples showed DMA levels ranging from 21.7 to 44.4 mg/kg (average of 34.5 mg/kg). Kimchi was assigned to one of the following five groups: kimchi without salted and fermented anchovy juice and salted and fermented shrimp (control), kimchi with small amount of salted and fermented anchovy juice (AK1), kimchi with large amount of salted and fermented anchovy juice (AK2), kimchi with small amount of salted and fermented shrimp (SK1), and kimchi with large amount of salted and fermented shrimp (SK2). SK2 had higher DMA content than SK1 during storage while AK2 had higher DMA content than AK1 after storage for 10 days. Nitrite contents of AK1 and SK1 were higher than those of AK2 and SK2 after storage for 20 days. NDMA content was significantly higher in SK2 than in SK1 after storage for 0 and 10 days, and NDMA content in AK2 was significantly higher compared to that in AK1 after storage for 0 days. The DMA and NDMA contents decreased in all kimchi samples during storage. The effects of amount and type of Jeotgal on DMA and NDMA contents were reduced after storage for 20 days. The results suggest that the content and type of Jeotgal have significant effects on formation of NDMA in kimchi.
Keywords
N-nitrosodimethylamine; dimethylamine; Jeotgal; kimchi; nitrite;
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Times Cited By KSCI : 7  (Citation Analysis)
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