• 한국식품영양과학회지
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• 제43권12호
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• pp.1865-1870
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• 2014

식품의 기호성과 산화안정성 및 영양학적 특징을 높이기 위해 참기름과 아마인유를 혼합하여 ${\omega}$-3와 ${\omega}$-6 지방산이 균형을 이루고 안정성이 우수한 다가불포화지방산을 갖는 혼합유를 제조하여 산화 및 관능특성을 조사하였다. ${\omega}$-3와 ${\omega}$-6 지방산이 균형 잡힌 안정성이 우수한 다가불포화지방산을 갖는 혼합유의 지방산 분석 결과 아마인유 20%와 참기름 80%를 혼합하여 제조한 혼합유(F20S80)의 ${\omega}$-3와 ${\omega}$-6의 조성 비율은 각각 8.9%와 39.7%로 약 1:5의 비율을 나타내었으며, 아마인유 10%와 참기름 90%를 혼합하여 제조한 혼합유(F10S90)의 ${\omega}$-3와 ${\omega}$-6의 조성 비율은 각각 4.4%와 42.1%로 약 1:10의 비율을 나타내었다. 이들의 비율은 ${\omega}$-3와 ${\omega}$-6에 대한 영양학적 권장 비율이 1:4~10 범위에 포함되므로 건강에 유리한 혼합유임을 알 수 있었다. 혼합유의 안정성을 평가하기 위해 $20^{\circ}C$ 상온, 상대습도 70%와 $45^{\circ}C$ 가온, 70% 상대습도 저장조건에서 16주간 저장하면서 아마 인유(F100), F20S80, F10S90 및 참기름(S100)의 산가와 관능특성을 분석한 결과, F10S90 혼합유는 $20^{\circ}C$ 상온, 70% 상대습도 저장조건과 $45^{\circ}C$ 가온, 70% 상대습도 저장조건에서 16주간 저장하였을 때에 두 조건에서 모두 S100과 통계적으로 유의차가 없는 것으로 나타났다. 결론적으로 F10S90 혼합유는 ${\omega}$-3와 ${\omega}$-6 비율이 1:10으로 건강에 유리한 유지이며, 참기름을 선호하는 우리나라에서는 기호성 및 저장성이 우수한 기능성 혼합유로 사용하여도 좋을 것이다.

• Journal of Nutrition and Health
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• 제32권7호
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• pp.802-811
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• 1999

The purposes of this study were to 1) examine the dietary patterns of fatty acids and the fatty acid composition in serum, 2) determine selenium (Se) concentrations, and 3) investigate how serum fatty acid compositon affects serum levels of Se in Korean elementary school children. The subjects consisted of 168 school children(82 boys & 86 girls) belonging to 1st through 6th grades, and their dietary assessment was evaluated. The serum fatty acid composition was analyzed by GLC, and the ICP/MS method was employed to measure serum Se concentration. Total average intake of PUFA, MUFA and SFA were 10.5g, 12.7g, 11.2g respectively. Total average dietary P/M/S ratio was 1.10/1.18/1.0. The average intake of $\omega$3 fatty acids and $\omega$6 fatty acids were 1.33g, 9.19g, respectively. The $\omega$6/$\omega$3ratio was 14.2 which is higher than the recommended range. In serum fatty acid composition, PUFA, MUFA, SFA were 40.6%, 28.1% and 31.6% respectively. The average $\omega$3 fatty acid composition was 3.80%, and the mean value of $\omega$6 series was 36.8%. The M/S ratio of girls was significantly higher than boy's in fatty acids intake and in serum composition. Mean Se concentration of total subjects was 416.7ug/l and it was significantly higher in the lower grades(1st-3rd)than in the upper grades(4th~6th, p<0.05). Although the mean serum Se concentration was negatively correlated with PUFA composition in total boys and girls, it was not significant. Serum Se concentration was negatively correlated with P/S ratio and C24:1 concentration(p<0.05). In addition, serum composition of $\omega$6 PUFA and C24:1 showed negative correlations with serum Se in only lower grades girl(1st~3rd), and further studies are needed to clarify in these phenomena. In conclusion, the mean serum Se concentration was significantly lower in upper grades (4th~6th)than in lower grades(1st~3rd) of elementary school children and was negatively correlated with P/S ratio of serum fatty acids. More detailed studies on relationship between Se and fatty acids are required.

• Journal of Animal Science and Technology
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• 제61권2호
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• pp.69-76
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• 2019

Maize which has very high omega-6 fatty acid content has been used as a main feed grain for Hanwoo beef production to increase marbling, and thus omega-6 to omega-3 fatty acids ratio in Hanwoo beef is expected to be biased. To elucidate the current status of omega fatty acids ratio in Hanwoo beef, fatty acid profiles of neutral lipid and phospholipid fraction were analyzed separately using 55 Hanwoo steers' longissimus dorsi muscle slaughtered at Pyeongchang, Korea from Oct. to Nov. 2015. In addition, an association study was conducted to evaluate associations between single nucleotide polymorphism (SNP) markers from references and omega fatty acid profiles in phospholipid of Hanwoo beef samples using analysis of variance (ANOVA). In neutral lipid fraction, composition of saturated and monounsaturated fatty acids was higher and polyunsaturated fatty acids was lower compared to those in phospholipid fraction. The mean n-6/n-3 ratios of Hanwoo were $56.059{\pm}16.180$ and $26.811{\pm}6.668$ in phospholipid and neutral lipid, respectively. There were three SNPs showing statistically significant associations with omega fatty acid content. GA type of rs41919985 in fatty acid synthase (FASN) was significantly associated with the highest amount of C20:5 n-3 (p = 0.031). CC type of rs41729173 in fatty acid-binding protein 4 (FABP4) was significantly associated with the lowest amount of C22:2n-6 (p = 0.047). AG type of rs42187261 in FADS1 was significantly linked to the lowest concentration of C20:4 n-6 (p = 0.044). The total n-6/n-3 ratio of the steer which has all four SNP types in above loci (27.905) was much lower than the mean value of the total n-6/n-3 ratio in phospholipid of the 55 Hanwoo steers ($56.059{\pm}16.180$). It was found that phospholipid and neutral lipid of Hanwoo have very high n-6/n-3 ratios compared to the reported data from different cow breeds. Four SNPs in genes related with fatty acid metabolism showed significant associations with the fatty acid profile of phospholipid and may have potential as SNP markers to select Hanwoo steers in terms of n-6/n-3 balance in the future.

• 대한수의사회지
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• 제33권3호
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• pp.149-154
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• 1997

• Journal of Nutrition and Health
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• 제28권7호
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• pp.602-611
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• 1995

This study was designed to find out the effects of $\omega$-3 and $\omega$-6 polyunsaturated and saturated fatty acid from prenatal to growing period on the brain growth and behavioral development of rats. Rats(Sprague-Dawley strain) were fed experimental diets-fish oil, corn oil or beef tallow-with different contents of $\omega$-3 and $\omega$-6 fatty acids throughout the prenatal and lactational period and up to 10 weeks of age. DNA and RNA concentration of rat brain were determined at 0, 3, 6 weeks of age and choline and acetylcholine concentrations were analyzed at 10 weeks of age. When the rats were 7 weeks of age, position reversional test in a Y-shaped water maze for 4 weeks was measured. The experimental results obtained are summarized as follows. Food intakes were significantly lower in fish oil group and body weight gain was low in the group fed beef tallow and the groups fed fish oil and corn oil were somewhat good. Food efficiency ratio was not significantly different among the groups. Brain weight was not affected by the fatty acid composition of experimental diets and DNA and RNA concentration of the rat brain were consistently maintained at the same level. It was not different significantly among the dietary groups in the DNA and RNA concentrations of the rat brain during the experimental period. The acetylcholine concentration in the fish oil group was somewhat higher than the other groups. The position reversional test in a Y-shaped water maze showed a significant difference the score of test among the experimental groups. The score of the rats fed the fish oil diet was significantly higher than the other groups and the concentration of acetylcholine in brain were too. Therefore the correlatin between the Y-shaped water maze test score and the acetylcholine concentratin in the brain was found. Above finding support the content that dietary fatty acid composition does not affect to the brain cell number and cell size but the behavior development is influenced. Therefore, the improvement of behavior development is required the effective usage of finny tribe.

• 한국해양공학회지
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• 제13권2호통권32호
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• pp.108-115
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• 1999

To study measurement of coated steel corrosion in mortar, a transient electro-magnetic(TEM) method was adapted. The sensors were made of enamelled wire with diameter of 0.25mm(transmitter), 0.1mm(receiver) and the secondary electro motive force(EMF) was measured with SIROTEMIII. The sensors configuration was used as in loop configuration. After coated steels were corroded by the salt spray during 3, 7, 15, 25days, they were embedded in mortar which were made from sand : cement : water ratio of 2 : 1 :0.5. To investigate coated steel corrosion in mortar, the sensors were used. ( sensorl - $T_x$ : $4{\Omega}$, $R_x$ : $10{\Omega}$, $3{times}3cm$, sensor2 - $T_x$ : $8{\Omega}$, $R_x$ : $10{\Omega}$, $3{times}3cm$, sensor3 - $T_x$ : $4{\Omega}$, $R_x$ : $10{\Omega}$, $6{times}6cm$, sensor4 - $T_x$ : $8{\Omega}$, $R_x$ : $10{\Omega}$, $6{times}6cm$). The obtained results showed that the secondary EMF was decreased with specimens of 3, 7days corroded coationg steel in mortar and then increased with specccimens of 15, 25days corroded one. And it was confirmed that measurement of coated steel corrosion in mortar by a transient electro-magnetic(TEM) method is possible.

• 한국식생활문화학회지
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• 제15권3호
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• pp.163-174
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• 2000

This research was designed to develop a computer program and evaluate the nutritional balances especially the balance of fatty acids, amino acids and antioxidant vitamins for convenience foods. The Korean convenience food, Kimbab purchased from markets was evaluated by using the self-developed computer program. Contents of calories, protein and calcium were lower$(1/3^{\circ}{\neq}1/2)$ than the recommended levels of Korean adult woman, and the carbohydrate/ protein/ fat(CPF) energy ratio was 70: 13: 17. The mean P/ M/ S ratio was 2.2/ 1.4/ 1 and that of ${\omega}6/\;{\omega}3$ fatty acids was 17.9/ 1, which was higher than the desirable ratio of $4{\sim}8/\;1$. Average essential amino acid balance of market-Kimbab samples was within the desirable range even though the absolute amount of protein was lower than the recommended level. Contents of antioxidant vitamins (A, C &E) were lower than recommended levels. Two kinds of nutritionally adjusted Kimbab menu were established by self-developed computer program. Some of major changes was adding food ingredients such as tuna fish and perilla leaf cooked with sesame oil and soybean oil to increase ${\omega}3$ series fatty acids. Some fruits and milk were also added to the menu. The adjusted CPF ratios was 63: 15: 22 and the new values for P/ M/ S and ${\omega}6/\;{\omega}3$ fatty acids ratios were 1.0/ 1.2/ 1/0 and 6.1/ 1 respectively. In sensory evaluation of two kinds of adjusted Kimbab, the taste and overall estimation scores were higher than unadjusted Kimbab. The computer program developed in this study might be used as a tool for the evaluation of nutritional balance of other convenience foods and menu planning.

• 대한가정학회지
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• 제36권11호
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• pp.183-191
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• 1998

This study aimed at the effect on serum glucose and lipid profiles according to carbohydrate / lipid intake ratio in Korean 191 NIDDM patients. Most of NIDDM patients belong to under 50-64 years. As carbohydrate intake level increased, lipid intake level decreased. The group of higher carbohydrate / lipid intake ratio shows significantly high in fasting glucose level and postprandial glucose in NIDDM patients. The higher carbohydrate / lipid intake ratio the higher dietary linoleic and $\omega$-3 fatty acid level but not in dietary $\omega$3/$\omega$6 ratio. Serum HDL decrease inhigher carbohydrate lipid intake ratio group. Serum total lipid and PUFA level decrease according to ditary total lipid intake decrease in men but not significantly different.

• Journal of Nutrition and Health
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• 제27권6호
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• pp.563-573
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• 1994

This study was conducted to compare the lipid content and fatty acid composition of the Korean breast milk produced at 1, 2 and 3 months postpartum with the infant formula produced in Korea. The content of total lipids of the breast milk was low compared with the other data of Korean as well as foreign breast milk, and the content tended to reduce during the progress of lactation. The composition of fatty acids of the breast milk was characterized by low saturated fatty acids(SFA) and high $\omega$3 series of polyunsaturated fatty acids (PUFA), especially 20:5 and 22:6, so the P/S and $\omega$6/$\omega$3 rations were high. The formulas had more total lipids, triglycerides(TG) and phospholipids and less cholesterol(CHOL) and free fatty acids than the breast milk. The cholesterol content of the formulas was around 50% of that of the breast milk, so the CHOL/TG ratio was low. Although the formulas varied in fatty acid composition, the formulas had more SFA and $\omega$6 series of PUFA, but less monounsaturated fatty acids and $\omega$3 series of PUFA than the breast milk. This study shows that there are some differences in lipid content and fatty acid composition between breast milk and infant formula. Therefore, further studies needed to investigate the physiological effect of this difference on lipid metabolism of infants.

• Preventive Nutrition and Food Science
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• 제6권3호
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• pp.170-175
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• 2001

This study was designed to investigate the effect of different sources of $\omega$3 fatty acid in the diet with a similar polyunsaturated/saturated (P/S) fatty acid ratio and $\omega$6/$\omega$3 fatty acid ratio as well as excess DHA on the plasma fatty acid composition and cholesterol level of rats. Three experimental diets contained 10% (w/w) dietary lipids. The control diet and one treatment diet were corn oil-based diets with different $\omega$-3 fatty acid sources: perilla (CO) or fish oil (CF), respectively. In order to examine the effect of excess DHA, the other treatment diet (FO) was a fish oil-based diet with corn oil to supply essential fatty acids at the level of 1.8% (w/w) of the diet. Female Sprague Dawley rats were fed the experimental diets for 2 weeks prior to mating and throughout gestation and lactation. Pups were weaned to the same diet of dams at 21 days of age. Plasma fatty acid compositions and cholesterol contents were analyzed for pups at 3th, 7th and 10th week after birth. Plasma DHA concentrations increased significantly as the level of fish oil supplementation increased. Three-, seven- and ten-week old rats fed on CO diet which contained only $\alpha$-lino1enic acid as a $\omega$-3 fatty acid Source had Plasma DHA levels of 4.85%, 3.15% ana 2.47%, respectively, suggesting that rats at this period of development can convert $\alpha$-linolenic acid to DHA. But the ability to form DHA might be limited, since dietary DHA showed to be more effective in raising the plasma level of DHA. There was a significant negative correlation between DHA and cholesterol concentration of the rat plasma at 7th week (r=0.34, p<0.05) and l0th week after birth (r=036, p<0.05), proving the hypocholesterolemic effect of DHA.