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12종 어류의 일반성분조성과 콜레스테롤 및 $\alpha$-토코페롤 함량의 계절변화
정보영,최병대,이종수,JEONG Bo-Young,CHOI Byeong-Dae,LEE Jong-Soo 한국수산과학회 1998 한국수산과학회지 Vol.31 No.5
Seasonal variation in the proximate composition, cholesterol (CHOL) and $\alpha$-tocopherol ($\alpha$-Toc) content of 12 spices of fish muscle, which caught off Tongyeong coast of the Southern Sea (Nam-Hae) from Mar. 1995 to Feb. 1996, was studied. Lipid and moisture content showed remarkable seasonal variation and there were a negative correlation between the both (r= -0,85, p<0.001), while protein and ash content unchanged almost through the sampling period. The lipid content of anchovy, hickoryshad, black sea bream, finespotted flounder sea eel, bastard, and file fish was high in Dec. Oct. Nov. Jan. Jan. Nov, respectively, and low in the season corresponding to their spawning period. However, in case of striped mullet, yellow tail, mackerel, rock fish and red sea bream, there was no correlation between their lipid content and spawning period, and thus these fishes fore considered to be affected more by water temperature and the content of their diet. CHOL content increased In :he season containing a high level of lipid, whereas $\alpha$-Toc content unchanged almost through the sampling period.
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정보영,문수경,정우건,하해성,JEONG Bo-Young,MOON Soo-Kyung,JEONG Woo-Geon,HA Hae-Seong 한국수산과학회 1999 한국수산과학회지 Vol.32 No.6
Proximate compositions of muscles and eggs between wild sweet smelt which were caught in Seomjin river and Miryang river, and cultured sweet smelt which were purchased from certain cultured farms in Hadong and Miryang, were compared. Proximate compositions of wild sweet smelt muscles were $76.7\~77.5\%$ for moisture, $18.4\~19.9\%$ for protein, $2.41\~3.47\%$ for lipid, and $1.04\~1.33\%$ for ash content and there were almost no differences between the fishes from Seomjin and Miryang river. Protein and ash content in the cultured fish muscles were similar to those of the wild fish muscles, while the former contained much more lipid and carbohydrate, and less moisture than the latter, especially lipid content differed greatly according to their cultured farms. This might be the result of their different diet compositions. Lipid, protein and carbohydrate content in eggs of the wild and cultured fishes were much higher than those in their muscles. There was a negative correlation between moisture and lipid content in all samples; y= -0.2715x+24.903 (r= -0.7253, p<0.001).
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한국산 및 일본산 참굴 종패의 양식과정 중 일반성분의 변화
정보영,문수경,정우건,이종수,JEONG Bo-Young,MOON Soo-Kyung,JEONG Woo-Geon,LEE Jong-Soo 한국수산과학회 1999 한국수산과학회지 Vol.32 No.5
Changes in proximate composition and meat weight of oysters cultured in shallow-water at Bukman bay of Tongyeong in Korea with Korean and Japanese spats were investigated. Protein content (dry basis) was rich in August and September, accounting for $70\~72\%$ in the oyster (Korean oyster) cultured with Korean spat and $75\~76\%$ in the oyster (Japanese oyster) cultured with Japanese spat. On the contrary to protein content, carbohydrate contents (dry basis) in the both oysters were poor in the both months, There was a negative correlation (r=-0.94, p<0.01) between protein and carbohydrate content during growing of the bath spats. Total lipid (TL) content was the poorest in August, which is known as spawning season, accounting for $1.4\~1.5\%$ in the both oysters. In addition, the korean oyster also showed the lowest level or TL content in october. Meat weights or the Korean and japanese oysterswere 4.2$\~$4.8 g/specimen and 7.5$\~$8.3 g/specimen, respectively, in the harvest season from November to December. Meat weight increased exponentially with TL content, $y=0,2081e^{1.5696x}$ (r=0.8856, p<0.001). These nutritional components per specimen were contained about two times more in the Japanese oyster than in the Korean one in the harvest period.
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정보영,문수경,최병대,이종수,JEONG Bo-Young,MOON Soo-Kyung,CHOI Byeong-Dae,LEE Jong-Soo 한국수산과학회 1999 한국수산과학회지 Vol.32 No.1
Seasonal variation in lipid classes and fatty acid compositions of total lipid (TL) of 12 species of Korean fish muscle, which caught off Tongyeong coast of the Southern Sea (Nam-Hae) from Mar, 1995 to Feb. 1996, was studied. Triglyceride (TG) and free sterol (ST) were prominent lipid classes of neutral lipid in all fish species. The percent of TG rose with increasing TL content by season, but that of ST fell. The prominent lipid classes of phospholipid were phosphatidylcholine (PC) and phosphatidylethanolamine (PE), percents of PC and PE were higher in the fish containing lower lipid. The prominent fatty acids in all fish species were 16:0 ($19.5\pm1.99\%$) 22:6 (n-3) ($16.6\pm7.46\%$), 18:1 (n-9) ($15.8\pm8.39\%$), 20:5 (n-3) ($8.46\pm3.70\%$), 16:1 (n-7) ($7.06\pm3.08\%$) and 14:0 ($3.80\pm2.15\%$). With increasing TL content by season, the percent of monounsaturated fatty acids (MUFA) such as 18:1 (n-9) and 16:1 (n-7) rose, but those of polyunsaturated fatty acids (PUFA) such as 22:6 (n-3) and 20:5 (n-3) fell. There was a negative correlation between the percent of the MUFA and the PUFA of total fatty acids. However, the PUFA content increased as the TL content increased by season. On the other hand, the percent of 16:0 almost unchanged by seasonal variation of lipid content.
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Isolation and Purification of DHA from Skipjack Orbital Tissue Oil
정보영,JEONG Bo-Young The Korean Society of Fisheries and Aquatic Scienc 1993 한국수산과학회지 Vol.26 No.6
Several methods were examined for purification of docosahexaenoic acid (DHA, 22:6n-3) from skipjack Euthynnus pelamis orbital tissue oil, a marine by-product, and a modified method for isolation of a high purity DHA was proposed. Skipjack orbital tissue contained $55.4\%$ of total lipid(TL), and DHA accounted for $23.7\%$ of the TL. Application of low-temperature crystallization and urea inclusion compound methods to the orbital fatty acid mixture resulted in increases of DHA concentrations to approximately $46\%\;and\;61\%$, respectively. These methods were suitable for large production of DHA with relative low purity because of the simple purification procedure. DHA of approximately $74\%$ in purity was obtained by silver nitrate aqueous solution method, but the method gave a very low recovery($<10\%$). Silver nitrate-impregnated silica column chromatography was suitable for purification of a high purity DHA(purity, $>98\%$ and recovery, $>90\%$) A modified method, silver nitrate-impregnated silica column chromatography combined with low-temperature crystallization(two step purication method) was proposed as the most effective method to obtain DHA with high purity($99.9\%$) from the skipjack orbital oil.
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