• Korean Journal of Exercise Nutrition
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• v.13 no.3
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• pp.185-192
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• 2009

The aim of this study was to examine the use of such dietary supplementation practices, opinions, taking period for dietary supplement, and among elite Judoists varying in age and gender. Subjects were recruited from Korea National Team Judoists in elite athlete training centers (Taenuing in Seoul, Korea and surrounding area), a total of 223 elite Judoists (2003y n=34, 2005y n=41, 2006y n=101, 2007y n=30, 2008y n=17). Data were collected from personal interviews with Judoists who participated at the Olympic games, Asian game and World Championship game since 2003-2008. Elite Judoists representing mean age of 2003y (men: 23.5±2.7, women: 22.6±2.4), 2005y (men: 23.4±2.6, women: 22.5±2.3), 2006y (men: 20.3±3.2, women: 21.9±2.4), 2007y (men: 25.3±2.6, women: 22.5±2.8) and 2008y (men: 23.9±3.9) completed a validated questionnaire assessing dietary supplementation practices and opinions. Older Judoists were significantly more likely to report greater dietary supplementation usage; to be advised by oneself; health food store and pharmacy retailers; to decrease taking period days per week and past 6 month. Relative to gender, significant differences were observed for the types of dietary supplementation reported; supplementation practice trend; reasons for dietary supplementation use.

• Bulletin of the Korean Chemical Society
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• v.22 no.6
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• pp.593-596
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• 2001

The reaction of [(2-N,N-dimethylaminomethyl) pheny] methylvinychlorosiane with t-BuLi in hexane solvent gave dimers, five isomeric 1,3-disilacyslobutanes which were weparated and charaterized. In trapping experiments with various trapping agents, no corresponding silene-trapping aduct was observed. We suggest that more important species for the formation of five isomeric dimers might be the zwitterionic species generated by virtue of intramolecular donor atom rather than the silene.

• Bulletin of the Korean Chemical Society
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• v.22 no.6
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• pp.597-604
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• 2001

The reaction of [(2-N,N-dimethylaminomethyl) pheny] methylvinychlorosiane with t-BuLi in hexane solvent gave dimers, five isomeric 1,3-disilacyslobutanes which were weparated and charaterized. In trapping experiments with various trapping agents, no corresponding silene-trapping aduct was observed. We suggest that more important species for the formation of five isomeric dimers might be the zwitterionic species generated by virtue of intramolecular donor atom rather than the silene.

• Analytical Science and Technology
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• v.21 no.3
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• pp.212-221
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• 2008

In order to investigate the information for effective detection and developing of latent fingerprints, we identified fatty acids composition of latent fingerprints on non-porous evidence surface and the chemical changes of latent fingerprint residue after print deposition during 7 months. Fingerprints from eight Korean male donors (aged 29-50 years) and one female donor (aged 36 years) were collected. All fingerprints were found to contain lauric acid (C12:0), myristic acid (C14:0), palmitic acid (C16:0), stearic acid (C18:0), elaidic acid (C18:1n9t), oleic acid (C18:1n9c), linoleic acid (C18:2n6c), arachidic acid (C20:0), linolenic acid (C18:3n3), erucic acid (C22:1n9) and docosadienoic acid (C22:2) and primarily palmitic acid (35.45-48.37%), oleic acid (14.84-28.49%), stearic acid (9.71-24.96%) and linoleic acid (7.68-18.8%) occupied 75% of total fatty acids. When the fingerprints were deposited at dark room for 7 months, total fatty acids components decreased about 12-25%. It can be explained that significant degradation of long-chain fatty acids such as elaidic acid (C18:1n9t), arachidic acid (C20:0), linolenic acid (C18:3n3), erucic acid (C22:1n9), and docosadienoic acid (C22:2) resulted in the generation of myristic acid (C14:0), myristoleic acid (C14:1) and pentadecanoic acid (C15:0).

• Journal of the Korean Applied Science and Technology
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• v.35 no.3
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• pp.654-666
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• 2018

This study was determined the effects of dietary omega-6 and 3 fatty acid ratios (n-6/n-3, 0, 4:1, 15:1, 30:1) on lipid metabolism in obese model animal rats. Blood triacylglycerol, total cholesterol, LDL-C, glucose, ALT, AST, insulin, and leptin concentrations in n-6/n-3 group were decreased by 22.21, 20.60, 52.96, 15.71, 11.97, 9.13, 37.57, 45.98%, respectively, while HDL-C and phospholipid concentrations were increased by 28.38, 80.39% respectively, compared with control group, as especially in 4:1 group showed the greatest effect. SREPB-$1{\alpha}$ and SREPB-2 mRNA in liver tissues were down-regulated in n-6/n-3 group, but LPL-mRNA of PPARs in adipose tissue was up-regulated compared with control group. The adipocyte size in liver tissues was decreased in the order of n-6/n-3 ratio of 30:1, control, 15:1 groups, and the adipocyte size in adipose tissues was decreased in the order of n-6/n-3 ratio of control, 30:1, 15:1, 4:1 groups.

• Journal of Life Science
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• v.12 no.3
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• pp.233-241
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• 2002

Seasonal variation of uraenesox cinereus) muscle was investigated. Crude lipid content varied from 3.85 to 12.59 g/100g, comprising the highest content in November. The major fatty acids of total lipid, neutral lipid, and phospholipid were C16:0, C23:0, C16:1, C18:1, C20:5, and C22:6, but in phospholipid, Cl8:3n-6 was also the major fatty acid. The C22:6 content of the neutral lipid was much lower compared to that of the total lipid and phospholipid. The content of polyunsaturated fatty acids (ranged from 73.93 to 66.23%) in phospholipid was higher than that of any other lipid fraction. In glycolipid, C20:1 and C14:1 were higher compared to those of any other lipid fraction, but C20:5 and C22:6 were lower. The annual average ratio of n-3 to n-6 of total lipid, neutral lipid, phospholipid, and glycolipid was 10.82, 12.27, 6.63, and 6.50, respectively. The particular trend of seasonal variation of fatty acid composition was not showed in total and neutral lipid. However, the samples caught in September and November had a high crude lipid content with a significantly lower content of polyunsaturated fatty acids in phospholipid. Also, the content of monounsaturated fatty acids in glycolipid was lower in samples of September, November, and January.

• The Korean Journal of Food And Nutrition
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• v.8 no.2
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• pp.59-69
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• 1995

This study designed to compare the hypolipidemic e(feats of n6 linoleic acid (LA), n3 w-linolenic acid(LL) and n3 eicosapentaenoic acid(EPA) and docosahexaenoic acid(DHA) In rats fed high fat (40% Cal) diet. Male Sprague-Dawley rats fed experimental diets for 6 weeks, which were different only in fatty acid composition. The dietary fats were beef tallow (BT) as a source of saturated fatty acid (SFA), corn oil(CO) for n6 LA, perilla oil (PO) for n3 a-LL and fish oil (FO) for n3 EPA+DHA. Plasma total cholesterol (T-chol) level was increased by n6 LA but decreased by n3 LL and n3 EPA+DHA and most effectively reduced by n3 EPA+DHA. Plasma triglyceride(TG ) level was reduced by n6 LA, but lipogenesis in liver was not affected by n6 LA. However, plasma TG level was lowered by n3 LL and EPA+DHA. Both lipogenic enzyme activity and liver TG level were also decreased by n3 PUFA. PO and FO groups were significantly higher in the relative Proportions of C20:5 and C22:6 of plasma and liver and lower in those of C20:4/C20:5 ratio. Overall, the lipid-lowering effect was in the order of n3 EPA+DHA >n3 LL > n6 LA and fish oil and perilla oil rich in n3 PUFA may have important nutritional applications in the prevention and treatment of hyperlipidemia.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.48 no.6
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• pp.977-981
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• 2015

The proximate, fatty acid and dimethyl acetal (DMA) compositions of domestic and imported melania snails Semisulcospira sp. being sold commercially were studied. The protein content ranged from 8.09% (China) to 11.3% (North Korea). The lipid content ranged from 0.84 (China) to 2.36% (North Korea). Domestic melania snail had protein (10.5%) and lipid (1.02%) contents intermediate between those of the two imported melania snails. The prominent fatty acids were 16:0 and 18:0 saturated fatty acids, 16:1n-7, 20:1n-11, 18:1n-9, 18:1n-7 and 16:1n-9 monounsaturated fatty acids, and 20:4n-6, 20:5n-3 (eicosapentaenoic acid, EPA), 22:2 non-methylene-interrupted diene (NMID), 18:3n-3, 18:2n-6 and 22:5n-3 (docosapentaenoic acid, DPA) polyunsaturated fatty acids (PUFA). The percentage of n-3 PUFA was higher in domestic (19.6%) and North Korean (imported, 19.5%) snails than in that from China (imported, 16.8%), while the n-6 PUFA level was higher in snails from China (21.2%) and domestic snails (14.7%) than in that from North Korea (9.87%). The total DMA, i.e., 18:0 DMA, 16:0 DMA and 18:1 DMA was 7.30, 7.27, and 4.86% domestic snail and those from China and North Korea, respectively. These results suggest that melania snail is a source of n-3 PUFA, and DMA derived from plasmalogen.

• Journal of the Korean Applied Science and Technology
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• v.31 no.2
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• pp.265-276
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• 2014

The purpose of this study was to evaluate the effect on lowering blood LDL-C in an adult human, by taking n-6/n-3 balanced Hanwoo beef and reducing n-6/n-3 in loin of Hanwoo beef. The randomized complete block design was used to conduct an experiment with a total of 20 castrated Hanwoo cattles, which were divided into two groups. Each group had 10 cattles, and the control group consisted of absence of linseed, while n-3 treatment group (n-3 group) had linseed. The results showed that n-6/n-3 in loin and blood was decreased to under 4:1 in n-3 group, while oleic acid as an monounsaturated fatty acid was increased by 52.79% compared to the control group. In above 70% of the clinical subjects who ate the balanced Hanwoo beef, the blood triglyceride, total cholesterol, and LDL-C were decreased by 25.35, 5.22, and 17.59%. However, in the subjects who ate the imported beef, and not the common Hanwoo beef, the same parameters were increased by 9.05, 8.21, and 21.70%, respectively. When the balanced Hanwoo beef were eaten, HDL-C were increased by 6.07% but the imported beef and common Hanwoo beef had those values decreased by 14.46 and 11.46%, respectively. The blood glucose was decreased by 6.42 and 11.82% in the subjects who ate balanced Hanwoo beef and common Hanwoo beef, respectively but the subjects who ate the imported beef had an increase by 15.19%.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.31 no.6
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• pp.895-900
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• 1998

In order to the effective utility of marine by-product, crude lecithin was isolated from skipjack viscera oil and the lecithin was refined by bleaching and deodorization. Crude lecithin was separated from the skipjack viscera oil degummed with 0.4 ml of citric acid per 100 ml of the oil. Bleaching was effected by adding $5\%$ activated clay and treating for $40^{\circ}C$ for 90 min under vacuum, and deodorization was effectively conducted by steam distillation at $130^{\circ}C$ for 60 min under 4 ton of vacuum. The major fatty acids of the skipjack viscera oil. were 16:0. 18:1 (n-9), 22:6 (n-3), 18:0, and 16:1 (n-7). Crude and refined lecithins contained more aproximately $7\~18\%$ of 22:6 (n-3) than raw oil, the skipjack viscera oil.