• 한국식품영양과학회지
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• 제23권2호
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• pp.205-211
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• 1994

This study was carried out to investigate the effect of the feeding mixture of linseed oil, rich in n-6 PUFA on the lipid metabolism in the dietary hyperlipidemic rats. After male Sprague-Dawley rats were induced hyperlipidemia by feeding the diet containing lard, butter and cholesterol for 3 weeks. then they were fed with the diet containing lard 3.0% and butter 12.0% for control, the mixture in different proportion of both linseed oil and sunflower seed oil, and antihyperlipidemic drugs for 2 weeks. Analysis of the fatty acid composition of the brain and heart lipids showed following results. In the fatty acid composition of brain lipids, C20:4 and C22:6 were the major fatty acids but showed little difference among the groups. In the fatty acid of heart lipids,C18:2 was the major fatty acid. The proportion of C20:4 decreased gradually as n-3P/n-6P ratio of the test lipids increased in groups 5 (linseed oil 12.0%) to 9 (sunflower seed oil 12.0%) while the proportion of C22:6 was not affected by the fatty acid composition of the test lipids.

• 한국식품영양과학회지
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• 제23권1호
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• pp.31-37
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• 1994

This study was carried out to investigate the effect of the feeding mixture of linseed oil, rich in n-3 PUFA and the sunflower seed oil, rich in n-6 PUFA on the lipid metabolism in the dietary hyperlipidemic rats. After male Sprague-Dawley rats were induced hyperlipidemia by feeding the diet containing lard, butter and cholesterol for 3 weeks, then they were fed with the diet containing lard 3 .0% and butter 12.0% for control, the mixture in different proportion of both linseed oil and sunflower seed oil and antihyperlipidemic drugs for 2 weeks. Analysis of the fatty acid composition of the serum lipoprotein fractions showed following results. In the fatty acid composition of serum lipoprotein , the proportion of C18:2 was dominant in all fractions, C20:5 in LDL and HDL fraction and C22:6 in chylomicron fraction. The ratio of n-3P/n-6P tended to increase gradually as it of the test lipid increased in groups 5 to 9 group and was affected by the fatty acid composition of the test lipids.

• 한국식품과학회지
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• 제30권4호
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• pp.781-786
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• 1998

가열산화 과정중 대두유 및 돈지의 표면적의 영향을 조사하기 위하여 대두유와 돈지를 공기와 접촉면적이 서로 다른 시료 4가지$(0.04,{\;}0.08,{\;}0.12,{\;}0.16{\;}cm^2/g)$를 $185^{\circ}C$에서 64시간동안 가열하였다. 각 시료의 산패 정도를 비교하기 위하여 요오드가, 공액이중결합함량, 굴절률, 유전상수, 극성지질함량 및 리놀렌산과 팔미트산의 비(L/P ratio)등이 측정되었다. $0.04{\;}cm^2/g$와 $0.08{\;}cm^2/g$의 표면적을 갖고 64시간 동안 가열한 대두유의 요오드가는 각각 126.4와 125.4인 반면에 $0.12{\;}cm^2/g$와 $0.16{\;}cm^2/g$의 표면적을 갖고 64시간 동안 가열한 대두유의 요오드가는 각각 113.1과 116.9로 표면적 증가에 따라 급속한 감소를 보였다. 돈지의 경우에는 대두유와 유사한 경향을 나타냈으나 그 감소 폭은 대두유에 비하여 현저히 낮았다. 대두유와 돈지의 극성지질함량, 유전상수, 굴절률 등은 $0.124{\;}cm^2/g$부터 급속한 증가를 보였다. 한편 대두유의 경우 $0.12{\;}cm^2/g$부터 가열시간에 따라 공액이중결합함량은 급속한 증가를, 리놀렌산과 팔미트산의 비(L/P ratio)는 급속한 감소를 나타냈으나 돈지의 경우에는 표면적에 따라 차이를 나타내지 않았다. 이상의 결과로부터 가열산화 과정 중 표면적에 따른 유지의 산화정도는 $0.12{\;}cm^2/g$부터 산패가 급속히 진행됨을 보여주었다.

• 한국식품과학회지
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• 제25권2호
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• pp.160-164
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• 1993

The antioxidant activity of ethanol extracts from defatted perilla flour was investigated by measuring peroxide value of perilla oil during storage at $45^{\circ}C$. The antioxidant activity of ethanol extracts was also compared with BHA, BHT and tocopherol. Anti-oxidant activity of ethanol extracts was also examined in corn oil and lard. The ethanol extracts contents of defatted perilla flour and the original perilla seed were 7.69 and 4.56% respectively. The antioxidant activity of ethanol extracts was superior to that of 0.02% BHT, BHA and tocopherol in the perilla oil substrate, merely in concentration of one-twentieth as much as that contained in original perilla oil seeds. The fractions of non-polar solvent (hexane and chloroform) obtained from silicic acid column chromatography are less effective than that of polar solvent as an antioxidant. Antioxidant activity of partially purified ethanol fraction is slightly inferior to that of original crude ethanol extracts. Ethanol extracts were also effective in corn oil and lard almost same as in perilla oil. The total phenolic compound contents of crude ethanol extracts and partially purified ethanol fraction were 9.3, 6.4%, respectively.

• Fisheries and Aquatic Sciences
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• 제22권4호
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• pp.8.1-8.9
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• 2019

A 12-week feeding trial was designed to evaluate the effect of total replacement of fish oil (FO) with terrestrial alternative oils on growth, feed utilization, body composition, hematological parameters, and fillet fatty acid profile of mandarin fish juveniles. Four iso-nitrogenous (56% crude protein) and iso-lipidic (13% crude lipid) practical diets were formulated. A control diet contained 6% FO and three other experimental diets were prepared by replacing FO with linseed oil, soybean oil, and lard (designed as FO, LO, SO, and lard, respectively). Each diet was randomly allocated to triplicate groups of 25 fish ($1.8{\pm}0.03g/fish$) in a circular tank. Complete replacement of FO by three tested alternative oils had no remarkable impact on growth performance, feed utilization efficiency, and morphological and hematological parameters of juvenile mandarin fish. However, daily feed intake was found to be significantly higher for fish fed the SO diet compared with those fed the FO and LO diets. Fish fed LO and SO diets exhibited significantly higher levels of the whole body lipid compared to fish fed diet containing FO. Fillet fatty acid composition reflected dietary fatty acid profile. The highest level of ${\alpha}$-linolenic acid, linoleic acid, and oleic acid was observed in fish fillet fed LO, SO, and lard, respectively. Although the eicosapentaenoic acid level of fish fillet fed diet FO was higher than other treatments, no significant difference was found in docosahexaenoic acid content among all dietary groups. The results of the present study clearly demonstrate that the complete replacement of FO in mandarin fish diets is achievable. These findings are useful in dietary formulation to reduce feed costs without compromising mandarin fish growth.

• Journal of Nutrition and Health
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• 제17권4호
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• pp.290-296
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• 1984

어유식이(魚油食餌)가 간장조직내 lipogenic enzyme의 활성도에 미치는 영향을 조사하고자 고등어유를 식이(食餌) 10%(w/w) 되게 먹이를 조제하여 13일동안 사육한 흰쥐의 간장조직의 glucose-6-phosphate dehydrogenase와 malic enzyme의 활성도는 lard를 섭취한 군(群)보다 $3{\sim}6$일의 섭취로 훨씬 저하되었으며 콩기름에 비하여는 같거나 또는 약간 낮은 값을 보였다. 고등어 또는 장어유를 어유(魚油)로 사용하여 먹이의 $0{\sim}10%$로 함량을 변화시키며 총지방량을 10%로 일정히 하고자 콩기름 또는 쇠기름을 배합유로 사용하였을 때 glucose-6-phosphate dehydrogenase의 활성은 어유(魚油)가 2 % 포함하였을 때부터 malic enzyme의 활성은 5% 포함하였을 때, 어유(魚油)를 포함하지 않은 군(群)에 비하여 감소를 보였다.

• 한국영양학회:학술대회논문집
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• 한국영양학회 2001년도 춘계연합학술대회 초록
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• pp.141.1-141
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• 2001

• 한국식품영양학회지
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• 제13권1호
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• pp.13-20
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• 2000

This study was designed the antioxidative effect of the ethanol extract obtained Rooibos tea (Aspalathus linearis) on various kinds of oil, and examined the synergistic effect of Rooibos tea extract by addition of citric acid to the antioxidation activity and also investigate to antioxidation effect of the extract in food production and storage peroids. The antioxidative activity of 0.2mg of Rooibos tea extract was showed similar to same doses of $\alpha$-tocopherol, BHA and BHT in linolieic acid-ethanol system. The antioxidative effect of the mixture with 0.1% Rooibos tea extract on lard was more effective than that of the mixture with same doses of $\alpha$-tocopherol, BHA and BHT. The antioxidative effect of Rooibos tea extract was showed slightly effects on lard or soybean oil. Antioxidative effects of Rooiboe tea extract in addition of citric acid as synergist showed more effective in linoleic acid-ethanol system, but did not showed in the other oils. In the application of Rooibos tea extract to food prodctuction and storage period, the antioxidative effect was more effective in biscult, preparation added lard mixed with 0.1% Rooibos tea extract.

• 한국식품영양과학회지
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• 제26권6호
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• pp.1164-1172
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• 1997

In this study we investigated the effects of dietary fat sources and onion on serum lipid levels in rats. One hundred twenty female Wistar rats two weeks old were randomly divided into five groups of 24 animals assigned to one of the ive modalities : Control group was fed only basal diet containing 6.3% of corn oil, T and L group were administered 6.3% beef tallow and lard substituted for corn oil in basal diet, LOv and LOx group were given same amount of lard as L group together with 4.2ml of onion juice/kg body weight, and 8.2ml of onion juice/kg body weight respectively. Six randomly selected rats from each group were evaluated for hematologic and serum biochemical parameters weekly. Over 4 week experiments it was found that the triglyceride and cholesterol levels were significantly elevated in T and L group compared with the control group. Triglyceride contents were significantly increased in L group compared with T group. But there was no difference in cholesterol levels between L and T group. LOv diet did not decrease significantly the triglyceride and cholesterol levels, but LOx group significantly did compared with L diet. LOx group had nearly normal values of bilirubin, creatinine, uric acid level and hemoglobin contents cut slightly increased levels in the glutamic oxaloacetic transaminase and alkaline phosphatase activities.

• Nutrition Research and Practice
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• 제7권5호
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• pp.352-358
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• 2013

Korean pine nut oil (PNO) has been reported to have favorable effects on lipid metabolism and appetite control. We investigated whether PNO consumption could influence weight gain, and whether the PNO-induced effect would result in an improvement of immune function in high-fat diet (HFD)-induced obese mice. C57BL/6 mice were fed control diets with 10% energy fat from either PNO or soybean oil (SBO), or HFDs with 45% energy fat from 10% PNO or SBO and 35% lard, 20% PNO or SBO and 25% lard, or 30% PNO or SBO and 15% lard for 12 weeks. The proliferative responses of splenocytes upon stimulation with concanavalin A (Con A) or lipopolysaccharide (LPS), Con A-stimulated production of interleukin (IL)-2 and interferon (IFN)-${\gamma}$, and LPS-stimulated production of IL-6, IL-$1{\beta}$, and prostaglandin $E_2$ ($PGE_2$) by splenocytes were determined. Consumption of HFDs containing PNO resulted in significantly less weight gain (17% less, P < 0.001), and lower weight gain was mainly due to less white adipose tissue (18% less, P = 0.001). The reduction in weight gain did not result in the overall enhancement in splenocyte proliferation. Overall, PNO consumption resulted in a higher production of IL-$1{\beta}$ (P = 0.04). Replacement of SBO with PNO had no effect on the production of IL-2, IFN-${\gamma}$, IL-6, or $PGE_2$ in mice fed with either the control diets or HFDs. In conclusion, consumption of PNO reduced weight gain in mice fed with HFD, but this effect did not result in the overall improvement in immune responses.