• Korean Journal of Human Ecology
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• v.10 no.1
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• pp.81-87
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• 2007

This study was designed to evaluate the balance of fatty acids for the Korean style broiled beef and pork ingredient of the rate of mixture oil with sesame oil, soybean oil and perilla oil, by self-developed computer program. Each 3 kinds of Korean style broiled beef and pork by the rate of mixure oil with sesame oil, soybean oil and perilla oil, were evaluated by using the self-developed computer program. Contents of calories were 415.6kcal in Korean style broiled beef, 656.3 kcal in Korean style broiled pork. The mean of protein were 41.35g, Korean style broiled beef, 32.66g, Korean style broiled pork. The ratio of C/P/F ratio of Korean style broiled beef and pork, 21/ 40/ 39, 10/ 20/ 70. The mean P/ M/ S of fatty acids in Korean style broiled beef and pork ratio was similar $0.4{\sim}0.5/\;1.4{\sim}1.5/\;1$. The ${\omega}6/{\omega}3$ ratio of fatty acids of Korean style broiled beef and pork using sesame oil was 54.3, 56.9 much higher than desirable $level(4{\sim}8)$. But the ${\omega}6/{\omega}3$ ratio of fatty acids of Korean style broiled beef using mixture oil with sesame oil, soybean oil and perilla oil were 4.6, 4.2 desirable $level(4{\sim}8)$, Korean style broiled pork using mixture oil with sesame oil, soybean oil and perilla oil were 3.0, 6.2. It means the ${\omega}6/{\omega}3$ ratio of fatty acids of Korean style broiled beef and pork was improved of desirable level respectively by using the mixture oil with sesame oil, soybean oil and perilla oil, than using sesame oil.

• Tribology and Lubricants
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• v.5 no.1
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• pp.7-11
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• 1989

Turbine oil이라고 하는 것은 각종 turbine에 쓰여지고 있는 윤활유를 총칭하는 것으로 turbine의 종류로부터 증기 turbine oil, 수력 turbine oil, gas turbine oil로, 그리고 용도에 따라서 육상 turbine oil. 선박 turbine oil, 윤활유의 특성에 따라 R & O turbine oil, EP turbine oil로 분류하고 있으며, tribology라고 하는 것은 간략하게 말하면 마찰, 마모, 윤활, 축수, 설계 등에 관한 제반문제들을 물리학, 화학, 역학 및 금속학 등의 관점으로부터 종합적으로 취급하는 기술이다.

• Journal of the Korean Society of Safety
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• v.13 no.2
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• pp.39-44
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• 1998

An experimental study on oil absorbent was conducted to investigate the feasibility of utilizing absorbents in oil separation from water-oil mixture for spilt oil recovery. Experiments included investigations of absorptivity and filtering performance of a commercial oil absorbent for different diesel oil concentrations. The measured average absorptivity of the absorbent was above 92% for oil concentrations, 5, 10, 15vo1%, that shows good absorbing performance. Filtering the oil-water mixture, however, was too slow to be used for oil separation. An absorbent baffle system was suggested for oil separation which collects oil panicles by increasing contact between the absorbent and oil particles.

• Journal of Environmental Science International
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• v.14 no.10
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• pp.973-978
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• 2005

Biodegradable oil gelling agent was prepared, and their oil absorption capacities using light oil, lubricant oil and corn oil were investigated. The result showed that the oil absorption capacity was depended on the amount of surfactant and starch added, and was increased in the order of light oil, lubricant oil and corn oil. Also, the oil-absorption capacity was saturated within 30 min at $18^{\circ}C$. The biodegradability of the prepared biodegradable oil gelling agent was also studied by determination of reduced sugar produced after enzymatic hydrolysis. Their surface morphologies and thermal properties of the prepared biodegradable oil gelling agent were observed by scanning electron microscopy (SEM) and thermogravimetric analysis (TGA), respectively.

• Journal of Nutrition and Health
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• v.22 no.6
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• pp.447-456
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• 1989

This study was performed to investigate nutritional effect and the utilization possibility of rapeseed oil which could replace the imported edible oils and oil crops. The proximate compositions of a recommendable cultivar(Mokpo Dangyo 19) and a native kind(Asahi) and the characteristics of these rapeseed oils were analyzed. The animal experiment of these rapeseed oils was carried out during 8 weeks of growing periods after weanling. Forty male weanling Sprague-Dawley rats were randomly assigned to 3 diet groups of Dangyo 19 oil, Asahi oil and commercial Soybean oil. Mokpo Dangyo 19 variety contained more lipids than Asahi variety by 8% and there was no difference in physiochemical characteristics between Dangyo 19 oil and Asahi oil except that erucic acid was contained little in Dangyo 19 oil but 50% in Asahi oil. Body weight gain, FER(Feed efficiency ratio) and PER(Protein efficiency ratio) of rats fed Dangyo 19 oil were higher than those of rats fed Asahi oil and organ weights such as liver, kidney and epididymal fat pads weights of rats fed Dangyo 19 oil were significantly higher(P<0.05) thanthose of rats fed Asahi oil. the apparent digistibility of total diet and total lipid were higher in rats fed the diets containing Dangyo 19 oil than Asahi oil. The content of total lipid in heart in heart were not significantly different with dietary oil kinds. The content of total lipid in liver increased with age in all rapeseed oil groups.

• Tribology and Lubricants
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• v.31 no.6
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• pp.245-250
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• 2015

This study investigates the lubrication characteristics of fuel injection pumps with reference to different fuel oils. Medium-speed diesel engines use fuel oils with various viscosities, such as heavy fuel oil (HFO, which is a high-viscosity fuel oil) and light diesel oil (LDO, which is a low-viscosity fuel oil). When fuel oil with a low viscosity is used, both fuel oil and lubricating oil lubricate the system. Thus, the lubrication of the fuel injection pump is in a multi-viscosity condition when the fuel oil in use changes. We suggest three cases of multi-viscosity models, and divide the fuel injection pump into three lubrication sections: a, the new oil section; b, the mixed oil section; and c, the used oil section. This study compares the lubrication characteristics with variation of the multi-viscosity model, clearance. The volume of Section b does not affect the lubrication characteristics. The lubrication characteristics of the fuel injection pump are poor when high-viscosity fuel oil transfers to low-viscosity fuel oil. This occurs because the viscosity in the new oil section (i.e., Section a) dominates the lubrication characteristics of the fuel injection pump. However, the lubricant oil supply in the used oil section (i.e., Section c) can improve the lubrication characteristics in this condition. Moreover, the clearances of the stem and head significantly influence the lubrication characteristics when the fuel oil changes.

• Tribology and Lubricants
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• v.25 no.1
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• pp.1-6
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• 2009

In this paper, the minimum oil film thickness and the maximum oil film pressure of engine bearings have been analyzed by using the elastohydrodynamic theory and Taguchi's design method as functions of the oil groove width, oil hole diameter, oil hole position, and oil supply pressure. The optimized design of the engine bearing f3r an automotive Diesel engine is very important for supporting a load-carrying capacity due to gas pres-sures from the engine combustion chamber and inertia forces of the piston. The optimized design data of engine bearings indicated that the optimized oil groove width and an oil diameter of a engine bearing are 8mm at the speed of 2,000 rpm for a given 4-cylinder Diesel engine. Thus, the oil groove oil groove and an oil hole for high performances of an engine bearing may be considered as major design parameters compared to other design factors, which are strongly related to the minimum oil film thickness and the maximum oil pressure distribution of the engine oil.

• Korean journal of food and cookery science
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• v.28 no.4
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• pp.443-450
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• 2012

This study was investigated the effect of an oil-water fryer on quality properties of deep frying oil used for chicken. The acid and conjugated dienoic acid values of frying oil using an oil-water fryer were lower than those using a deep fat fryer, whereas the iodine value of frying oil using an oil-water fryer was higher than that using a deep fat fryer. The peroxide values of frying oil did not increase with frying number. Frying oil with an oil-water fryer had lower palmitic acid, stearic acid and oleic acid, and higher linoleic and linolenic acid contents than those with a deep fat fryer. The contents of trans-fatty acids in frying oil using a deep fat fryer and oil-water fryer after frying 110 chickens were 0.75% and 0.47%, respectively. The benzopyrene contents of frying oil using a deep fat fryer and an oil-water fryer after frying 110 chickens were 2.20 and $1.61{\mu}g/kg$, respectively.

• Journal of architectural history
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• v.32 no.5
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• pp.107-117
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• 2023

There are records and claims that tung oil was applied to Korean traditional buildings and furniture as finishing paint. Records of the use of tung oil(桐油) exist in the Annals of the Joseon Dynasty(朝鮮王朝實錄) and The Royal Protocols of the Joseon Dynasty(朝鮮王朝儀軌). However, there is also a claim that tung oil was not produced in Korea on its own, and that tung oil was not applied to important buildings such as palaces. Silhak scholar(實學者) Seo Yu-gu says that in Korea, people do not know how to grow tung trees, and boiled perilla oil is called tung oil. If tung oil was used in the Joseon Dynasty, it would be necessary to use tung oil for waterproof coating to preserve current architectural heritage, otherwise, tung oil coating would not be desirable. Analyzing the Yeonggeon Uigwe(營建儀軌) among the Joseon Dynasty's Uigwes shows that tung oil is neither mentioned nor used. In addition, as a result of analyzing the Uigwes mentioned in tung oil, it was found that perilla oil or Myeongyu(明油), not tung oil, was recorded in the actual material used. Therefore, the records of the use of tung oil during the Joseon Dynasty can be seen as records using Myeongyu(明油) or Beopryeon perilla oil(法煉荏油).

• Journal of Korean Society of Coastal and Ocean Engineers
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• v.23 no.3
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• pp.193-204
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• 2011

To develop more robust oil boom which is vulnerable to various failure mode under severe weather condition, highly accurate wave model is developed using Spatially filtered Navier-Stokes Eq., LDS (Lagrangian Dynamic Smagorinsky model) for residual stresses, SPH (Smoothed Particle Hydrodynamics). To clarify the hydraulic characteristics of floating type oil boom, we numerically simulate the behavior of oil spill around oil boom under very energetic progressive waves. At the first stage, we firmly anchored the oil boom, and then, allowed the excursion of the oil boom. It turns out that oil boom with skirt of enough length (longer than 30% of depth) effectively confines the oil spill even against very energetic waves. We can also observe obliquely descending vertical eddies between y = 1~2 m as horizontal vortices shedding at the interface of oil spill and water are diffused toward the bottom, which is believed to be the birth, growing and break-down of Kelvin-Helmholz wave.