• 한국식품저장유통학회지
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• 제16권1호
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• pp.75-81
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• 2009

옥수수기름의 제조공정 단계별 공정유 및 이 과정에서 발생되는 부산물에 함유되어 있는 B(a)P 함량을 측정하고 이의 제거방안에 대하여 연구하였다. 옥수수기름에서 높은 수준의 B(a)P가 검출되는 원인은 옥수수에 함유되어 있는 B(a)P의 80% 이상이 옥수수 배아에 집중적으로 분포하는데 따른 현상이었다. 이로부터 얻어진 원유를 일반적인 정제공정을 거칠 경우 최종 탈취유에서는 $2.15{\mu}g$/kg가 검출 되었다. 따라서, 옥수수기름에서 일반적인 정제공정에 의해서는 현행 우리나라의 식용유 중 B(a)P 함유량 $2.0{\mu}g$/kg 이하의 법적 규격을 충족시키기 어려움을 쉽게 알 수 있었다. 이에 탈색공정에서 사용하는 2%(w/w) 내외의 산성백토 대신 산성백토:활성탄소=90:10(w/w)의 혼합분을 처리하여 $0.09{\mu}g$/kg 수준의 탈취유를 얻을 수 있었다. 이 때, 활성탄소의 처리량은 산성백토 대비 10% (w/w) 수준이 적정하였으며, 이의 증가에 따른 B(a)P 제거율 증가는 기대하기 어려웠다. 처리하는 활성탄소의 입도가 B(a)P 제거에 미치는 영향이 컸는데, $50{\sim}100$ mesh 수준의 입도를 갖는 것이 최적의 조건임을 확인하였다.

• Journal of Nutrition and Health
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• 제24권6호
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• pp.485-495
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• 1991

Using isolated perfused livers obtained from rats that have been fed saturated and unsatu-rated fatty acid diets the rates of hepatic microsomal oxidation of 7-ethoxycoumarin(EC) to 7-hydroxycoumarin(HC) and the rates of subsequent conjugation of the produced HC to its glucuronide and sulfate esters have been determined. Prior to preparing the isolated perfused livers. rats were fed either fat free diet 10% beef tallow diet or 10% corn oil diet for 3 weeks. The rates of oxidation from EC to HC and also of the subsequent glucuronidation of HC were higher in the corn oil diet group than those found for the fat free and beef tallow diet groups. When the concentrations of infusing EC were increased stepwise there was a dose-dependnet increase for the release of the glucuronide form of HC metabolites at the expense of the sulfate ester form. This dose dependant shift observed for the corn oil group was more significnat than those found for other groups. These results indicate that corn oil feeding has produced enhancement in the rates of hepatic microsomal drug oxidation and glucuronide conjugation the reactions catalyzed by enzymes embedded in the hepatic microsomal membranes.

• 한국식품영양학회지
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• 제26권4호
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• pp.670-677
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• 2013

In this study, the effects of the intake of Prunus sargentii R. seed oil on the lipid levels of mouse blood were compared to the effects of commercially available corn oils. Mice from the same purchase lot were separated into 3 groups [control (n=5), corn oil-treated group (n=5), and Prunus sargentii R. seed's oil-treated group (n=5)] of equal size. The oil-treated groups of mice were fed their respective supplemented diets for a total of 8 weeks. Prunus sargentii R. seed oil is high in palmitic acid, oleic acid, and linoleic acid. The kidney weights of mice fed Prunus sargentii R. seed oil were higher than those fed corn oil (p<0.05). The HDL-cholesterol (high density lipoprotein cholesterol) levels in mice fed Prunus sargentii R. seed oil ($124.40{\pm}20.19$mg/dl) were higher than those of mice fed corn oil (p<0.05). The total cholesterol level was highest in mice fed Prunus sargentii R. seed oil, but the LDL-cholesterol (low density lipoprotein cholesterol) level was lowest in mice fed Prunus sargentii R. seed oil. Therefore, Prunus sargentii R. seed oil may be a good resource as a natural oil material.

• 한국응용과학기술학회지
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• 제4권2호
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• pp.63-69
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• 1987

This study is carried out to compare the quality of sesamin oil using to 52 restaurants in city with that of pure sesamin oil. The pure sesamin, corn soybean and perilla oils used reference oil commodities of famous corporations. The fatty acid, sesamin and sterols of reference and restaurant oils are analyzed by gas chromatography. The results are as follows; 1. A pure sesamin oil can be identified with the component and content of fatty acid, sterol and sesamin. 2. In 52 restaurant oils, 12 oils (23％) are estimated as pure sesamin oil and the remainders (77％) are mixed with corn oil, soybean oil an perilla oil. 3. The sesamin oil that is mixed with corn oil is 35％, soybean oil is 17％ and perilla oil is 15％.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1521-1521
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• 2001

The objective of the research being presented was to construct and calibrate a spectrometer for the analysis of single kernels of corn. In light of the difficulties associated with capturing the spatial variability in composition of corn kernels by single-beam spectrometry, a hyperspectral imaging spectrometer was constructed with the intention that it would be used to analyze single kernels of corn for the prediction of moisture and oil content. The spectrometer operated in the range of 750- 1090 nanometers. After evaluating four methods of standardizing the output from the spectrometer, calibrations were made to predict whole-kernel moisture and oil content from the hyperspectral image data. A genetic algorithm was employed to reduce the number of wavelengths imaged and to optimize the calibrations. The final standard errors of prediction during cross-validation (SEPCV) were 1.22% and 1.25% for moisture and oil content, respectively. It was determined, by analysis of variance, that the accuracy and precision of single-kernel corn analysis by hyperspectral imaging is superior to the single kernel reference chemistry method (as tested).

• 한국재난정보학회 논문집
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• 제18권3호
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• pp.574-580
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• 2022

연구목적: 옥수수유는 반건성유로서 불건성유보다 이중결합의 수가 많고 산소와 결합하기 쉬우므로 자연발화의 조건이 충족되면 적은 양으로도 가연성 물질에 흡착될 경우에는 자연발화가 쉽게 발생된다. 또한 최근 자연발화의 원인 중 산화열에 의해 기름이 묻은 헝겊 등에 의한 사고가 늘어나고 있다. 그러므로 65℃에서 타올의 매수와 옥수수유의 양에 따른 자연발화의 특성을 파악하고자 한다. 연구방법: 실험온도를 65℃로 설정한 후 타올 한 장당 25ml, 50ml, 75ml에 해당하는 옥수수유를 분사시킨 후 시료의 중심 온도가 설정된 온도보다 상승하고, 타올이 연소로 인해 탈 경우에는 발화로 판정하였으며, 시료의 중심 온도가 설정된 온도와 유사할 경우에는 비발화로 판정하였다. 연구결과: 옥수수유를 타올 한 장 당 25ml씩 골고루 분포시킨 후 실험을 한 결과 타올이 5장 일 때는 비발화되었으며, 타올이 10장, 15장일 때는 발화되었다. 또한 옥수수유를 타올 한 장 당 50ml, 75ml씩 사용하여 실험한 결과 타올이 5장, 10장, 15장일 때 자연발화가 발생되었다. 결론: 옥수수유가 적은 양으로도 자연발화의 조건을 충족하면 화재가 발생할 수 있다.

• 한국식품과학회지
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• 제36권1호
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• pp.19-24
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• 2004

5% corn oil과 17 mM Brij 700으로 제조한 corn oil-in-water emulsion(O/W)의 droplet의 크기는 첨가되는 phenol의 양이 많아질수록 지방구가 다소 커지는 경향을 보였으며, continuous phase의 surfactant 양은 대조구에 비해 다소 낮아졌다. O/W에 녹차로부터 분리한 phenol류를 100-200 ppm의 농도로 첨가하고 30일간 저장하며 hydroperoxide의 생성량을 측정한 결과 대조구에 비해 낮은 hydroperoxide 함량을 보여 유도기간이 길어지는 것으로 나타났으며, phenol 종류별 hydroperoxide 생성억제 효과는 BHT > procyanidin B3-3-O-gallate>(+)-gallocatechin>(+)-catechin의 순서로 나타났다. 지방 산화의 결과 발생하는 aldehyde의 함량을 측정함으로서 산화정도를 측정하기 위하여 headspace hexanal 양을 측정한 결과, 대조구는 15일까지 hexanal이 검출되지 않았으나 phenol 첨가구는 20-30일로 headspace aldehyde의 불검출기간이 길어졌으며, 농도가 증가할수록 낮은 함량을 나타내었다. Phenol 종류별 headspacealdehyde 생성 억제 효과는 BHT > procyanidin B3-3-O-gallate > (+)-gallocatechin >(+)-catechin의 순서로 나타났다.

• 한국응용과학기술학회지
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• 제4권1호
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• pp.91-97
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• 1987

Because of its more complete hydrolysis and rapid absorption, MCT is expected its usefulness in the diets of patients with malabsorption syndrom. Also, several authors reported that serum cholesterol level was lower after MCT feedings. In this study, rate of each experimental group were fed for 4weeks with 20％ MCT, 20％ corn oil, mixed diet of 10％ MCT and 10％ corn oil, mixed diet of 17％ corn oil and 3％ shortening. After experimental diet, it was measured to growth rate and serum cholesterol, triglyceride and phospholipid level. The results were as follows; 1. The body weight gain was the lowest in MCT group and others were lower than control group. 2. Serum total cholesterol level was the lowest in corn oil group and others were significantly lower than control group. Free cholesterol level was lower in all experimental groups than control group too. 3. Serum HDL-cholesterol level was significantly higher in all experimental groups than control group. 4. The ratio of VLDL, LDL-Cholesterol to HDL-Cholesterol was significantly lower in all experimental groups than control group. 5. Serum triglyceride level was higher in all experimental groups than control group. Serum phospholipid level was significantly in only mixed diet group of corn oil and shortening than control group. 6. The ratio of total cholesterol to phospholipid was significantly lower in corn oil diet group than control group.

• Journal of Nutrition and Health
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• 제25권5호
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• pp.339-350
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• 1992

This study was performed to investigate the effect on polyunsaturate fatty acid diets and feeding periods on the antithrombosis. the hematological changes in the blood and fatty acid compositions of platelets in rats. Each group of rats was fed a diet containing 20%(W/W) corn oil beef tallow sardine oil and the general stock diet for 10, 20. 40 and 80 days. Rats fed sardine oil diet showed significantly longer bleeding time than any other diet groups after 20 days feeding The whole blood clotting time of sardine oil group fed for 80 days was increased significantly. The number of platelet and the concentration of hemoglobin showed no significant difference among all groups. The number of white blood cell was decreased continously in sardine oil group after 10 days feeding. The level of malondialdehyde generation during thrombin-induced aggregation of platelets was decreased continously in sardine oil grou after 20 days feeding. With regard to the composition of platelet fatty acid the ratio of eicosapentaenoic acid(EPA 20: 5 $\omega$-3) to arachidonic acid(AA 20:4 $\omega$-6) was increased in sardine oil group but decreased in corn oil groups and beef tallow groups with days. In conclusion the rats fed sardine oil diet for more than 20 days showed the fact that EPA induced the antithrombosis. the changes in number of white blood cell and the fatty acid composition of platelets.

• BMB Reports
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• 제36권3호
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• pp.258-264
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• 2003

This study examined the effect of dietary polyunsaturated fatty acids (PUFA) that were supplemented with vitamin E on lipid peroxidation, glutathione-dependent detoxifying enzyme system activity, and lipogenic fatty acid synthase (FAS) expression in rat liver. Male Sprague-Dawley rats were fed semipurified diets containing either 1% (w/w) corn oil or 10% each of beef tallow, corn oil, perilla oil, and fish oil for 4 wk. Alpha-tocopherol was supplemented in perilla oil (0.015%) and fish oil (0.019%). Hepatic thiobarbituric acid reactive substances, an estimate of lipid peroxidation, were not significantly different among the dietary groups. The glutathione peroxidase, glutathione reductase, and glutathione S-transferase activities were all elevated by the polyunsaturated fats, especially fish oil. The activity of FAS was reduced in the polyunsaturated fat-fed groups in the order of fish oil, perilla oil, and corn oil. The mRNA contents decreased in rats that were fed the 10% fat diets, particularly polyunsaturated fats, compared with the rats that were fed the 1% corn oil diet. Similarly, the inhibitory effect was the greatest in fish oil. These results suggest that lipid peroxidation can be minimized by vitamin E; PUFA in itself has a suppressive effect on lipogenic enzyme.