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Physicochemical Comparison of Two Different Shark Meats Used for Preparation of Dombaeki  

Kim, Eun-Ok (Department of Food Science and Nutrition, Catholic University of Daegu)
Yu, Myeong-Hwa (Department of Food Science and Nutrition, Catholic University of Daegu)
Lee, Ki-Teak (Department of Food Science and Technology, Chungnam National University)
Kim, Seon-Bong (Department of Food Science and Technology, Pukyoung National University)
Choi, Sang-Won (Department of Food Science and Nutrition, Catholic University of Daegu)
Publication Information
Food Science and Preservation / v.15, no.5, 2008 , pp. 711-718 More about this Journal
Abstract
Dombaeki, a traditional salted shark meat, has been widely used as a customary religious food in the Daegu-Gyeongbuk area of Korea. Two different sharks, Sphyrna zygaena (SZ) and Isurus oxyrinchus (IO) are traditionally used to prepare Dombaeki. Chemical components, lipid classes, fatty acid levels, and sterol compositions of meats prepared from the two sharks were investigated. There were no significant differences in chemical composition between the two dried shark meats. Major amino acids in shark meat were leucine, lysine, arginine, proline, isoleucine, valine, phenylalanine, glutamic acid, and asparagine, which together accounted for about 40% of total amino acids. Levels of amino acids in IO meat were higher than in SZ meat. Major fatty acids in the two shark meats were palmitic ($C_{16:0}$), stearic ($C_{18:0}$), oleic ($C_{18:1}$), arachidonic ($C_{20:4}$), and docosahexanoic (DHA, $C_{22:6}$) acids, which accounted for about 80% of total fatty acids. Notably, IO meat showed higher amounts of DHA (31.8%) and eicosapentanoic acid (EPA, 1.8%) than did SZ meat. The two shark meats showed similar dry weight levels of total lipids, with triacylglycerols, free fatty acids, sterols, and phospholipidscomprising on average 5.0, 2.0, 13.0 and 63.0% of total lipids, respectively. The dominant classes of phospholipids were mainly phosphatidylcholine (PC) and phosphatidylethanolamine (PE). PC content in the two shark meats was higher than that of PE, although the differencewas not great. The major fatty acids in phospholipids were myristic, palmitoleic, stearic, and docosanoic acids. Total volatile basic nitrogen content and the pH of SZ meat were lower than those of IO meat, whereas the Hunter's 'a' and 'b' values of SZ meat were higher than those of IO meat. These results suggest that shark meat may be useful as a functional food to prevent several degenerative diseases.
Keywords
Shark(Sphyrna zygaena, Isurus oxyrinchus) meats; proximate composition; fatty acid and lipid compositions; phospholipids; total volatile basic nitrogen;
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Times Cited By KSCI : 5  (Citation Analysis)
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