• 대한화장품학회:학술대회논문집
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• 대한화장품학회 2003년도 IFSCC Conference Proceeding Book I
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• pp.258-267
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• 2003

Recently inside nano liposome particles or nano-emulsions which contain tough-melting physiology activity materials or the coefficient of low organism utilization promote the coefficient of organism utilization, so this part has been studied a lot because they can absorb selectly cosmetics, specially physiology activity materials, into the skin. Also, in particle size, cells interstitial lipid interval are 30~50nm, so nano-emulsions that the size is similar to 30~50 nm are made to study for absorbing quickly into the skin. And transparent skin which contains oils in common skin lotion dosage form has become the center of public interest. The used nano-emulsions in this study were unsaturated lecithin/co-surfactant! ethanol/ oil / water. And polysorbate 20/ polysorbate 80/ Dicetyl phosphate/hydrogenated .caster oil/ isoceteth-20/SLS were used in co-surfactant. The used oils were cyclomethicone and caprylic/capric triglyceride. The manufacturing process was that microfluidizer was fixed in 1000bar and transit times were changed from 1 to 10 times. From transparency and particle size, the transparency sequence was SLS> polysorbate 20= polysorbate 80> isoceteth-20> dicetyl phosphate >hydrogenated caster oil and the particle size was small. Specially cyclomethicone nano-emulsions, when we made unsaturated lecithin /SLS /ethanol/water/cyclomethicone, cyclomethicone 5％ was good for transparency. And 20％ of this was used for making transparent skin toner in common skin dosage form.

• 해양환경안전학회지
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• 제17권1호
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• pp.29-37
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• 2011

유속의 변화에 따른 오일펜스 만곡부 후면의 속도장과 압력장, 와도 및 난류 강도를 계측한 PIV 실험의 결과 유속이 증가함에 따라 유동 경계역의 후면부에서의 흐름 방향이 전면부의 흐름 방향에 가까워지는 현상이 나타났고, 압력 분포의 양상이 달라졌으며 난류도 더욱 불규칙적인 형태로 나타났다. PIV 실험과 동일 조건으로 수행한 CFD 해석 결과, 후류의 유동 패턴이 0.3m/s이하의 저속인 경우는 PIV 실험 결과와 유사하게 나타났으나, 유속이 0.4m/s일 때는 오일펜스 자체의 유연성으로 인해 다소 차이가 나타났고, 오일펜스 하단의 압력차로 인한 불규칙한 난류가 수면까지 영향을 주었다.

• 융합신호처리학회논문지
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• 제24권3호
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• pp.153-159
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• 2023

오존화 올리브 오일은 피부 질환에 우수한 치료 효과가 있어, 오존을 활용한 화장품 제조 기술의 개발이 시도되고 있다. 오존은 인체에 유해한 요소가 있어 오존화 올리브 오일을 화장품 원료용으로 제조하기 위해서는 별도의 시설이 준비되어야 한다. 본 연구에서 개발된 제조 장치는 생산에 투입된 작업자의 안전이 확보된 상태에서 화장품 제조에 최적화된 공정으로 설계 되었다. 구현된 장치로부터 제조된 오존화 올리브유의 검증을 위해 동물실험을 대상을 한 독성시험을 진행하였고 Rabbit에 대한 오존화 오일(고농도)을 Rabbit의 등 부위에 24시간 동안 도포한 후 사망률, 일반증상 및 피부 자극평가를 수행하였다. 실험 결과 일정 시간 후 시험 물질 처치부위를 평가한 결과, 모든 동물에서 피부자극이 관찰되지 않음이 확인되어 오존화 오일의 생산공정의 안전성과 생성물의 안전성을 확인 할 수 있었다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 추계학술대회 논문집 학회본부 C
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• pp.897-899
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• 1999

In this paper, the interfacial dielectric breakdown phenomenon of interface between Epoxy/EPDM (ethylene propylene diene terpolymer) was discussed, which affects stability of insulation system of power delivery devices. Specimen structure was designed by using MAGSOFT's FLUX2D based on the finite elements method. Design concepts is to reduce the effect of charge transport from electrode in the process of breakdown and to have the tangential electrical potential with the Epoxy/EPDM interface. AC interfacial breakdown phenomenon of was investigated by variation of interfacial conditions oil and temperature which are supposed to have influence on the interfacial breakdown strength. Interfacial breakdown strength was improved by spreading oil over interfacial surface. The decreasing ratio of the AC interfacial breakdown strength in non-oiled specimens was increased by the temperature rising and its of oiled specimens was not affected by temperature.

• 한국약용작물학회지
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• 제11권5호
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• pp.364-370
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• 2003

서양측백나무의 잎으로부터 정유를 steam distillation법으로 추출하고, GC-MS로 정유 조성성분을 분석하였으며, 28종의 미생물종을 대상으로 항균활성을, DPPH법으로 항산화 활성을, 집모기에 대한 살충효과를 검정하였다. 서양측백나무 정유 주성분은 monoterpene류였으며, d-isothujone, l-fenchone, ${\alpha}-thujone$, camphor, terpin-4-ol 순으로 나타났다. 정유의 박테리아에 대한 항균력은 박테리아 중 Streptococcus pyogenes에서, 그리고 효모 및 곰팡이 중 Candida albicans에서 가장 높게 나타났다. 특히 서양측백나무 정유는 그램 양성균의 박테리아에 대해 가장 장한 항균력을 보였다. 정유는 DPPH radical 소거능을 보유하고 있었으며, $EC_{50}$ 값은 $36\;{\mu}{\ell}/m{\ell}$이었다. 집모기에 대한 살충 효과는 분무, 훈증, 자연증발 등 처리방법에 따라 다르게 나타났으며, 그 중 분무처리가 가장 효과적인 것으로 나타났다. 이상의 결과는 환경 친화적인 항균 및 살충소재로 이용될 수 있을 것이다.

• 한국식품과학회지
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• 제45권6호
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• pp.763-769
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• 2013

본 연구는 전자코를 이용하여 시판 콩기름의 휘발성분이 파장에 영향을 받는지 알아보고자 암실과 형광등 및 파장이 다른 LED 광원을 PE 용기에 조사하면서 12주 동안 변화되는 휘발성분의 패턴 변화를 분석하였다. 콩기름의 휘발성분의 변화는 저장기간동안 암실 처리구에서 가장 적고 천천히 일어났으며, 형광등 처리구에서 가장 크고 급격한 변화가 일어나는 것을 보여주었다. 저장 초기인 4주에는 형광등 처리구를 제외한 모든 처리구에서 미세한 변화가 일어났으며, 저장 12주에는 형광등 처리구 다음으로 파란색과 백색 LED 처리구에서 큰 변화를 보여준 반면 초록색 LED 처리구에서는 변화가 적었다. 파란색과 흰색 LED 처리구는 저장 12주째에서 급격한 휘발성분의 변화가 나타났다. 하지만 빨간색과 초록색 LED 조사 시에는 8주째에 급격한 휘발성분이 생성된 것에 비하여, 저장 12주째에는 휘발성분의 변화가 매우 감소하는 것을 보여주었다. 또한 초록색 LED 처리구에서 가장 적은 변화를 보였다. 이러한 결과를 토대로 볼 때 초록색 LED 광원에서 콩기름을 전시 판매하는 것이 바람직하며, 형광등과 파란색, 백색 LED 광원은 바람직하지 못한 것으로 판단된다. 또한, 전시 판매가 아니라면 암실에서 저장하는 것이 가장 바람직할 것으로 예상되는 바이다.

• 한국식생활문화학회지
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• 제5권1호
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• pp.43-58
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• 1990

To analyze wedding feast dishes of royal prince (1651, 1696) of Choson Dynasty, studied Gare Dogam Euigwae. Historic book 'Gare Dogam Euigwae' discribed wedding feast dishes of king‘s Choson Dynasty. The results obtained from this study are as follows. Dishes were arranged in four kinds of table, the first one called the main table, the second the right side table, the third the left side table, the fourth the confronting side table. Dishes of main table were oil and honey pastry, and fruits (pine nuts, orange, dried persimmon, torreya nuts, dried chestnut, jujube). Dishes of the second table and the third table were oil and honey pastry, and small cake made of honey and rice with patterns pressed in it. Dishes of the fourth table were cooked vegetable (wild ginseng, platy-codon, radish, white gourd melon, ginger), dried slices of meat seasoned with spices (abalone, octopus, shark, pheasant), cooked meat (wild goose, fowl, egg, pheasant, abalone), and fried fish (roe deer, fish, duck, pigeon, sparrow). The main table (同牢大宴床) and the second table (右挾床) stand as a symbol for integrity. The third table (左挾床) symbolize longerity. The fourth table (面挾床) symbolize bearing many young and connubial felicity.

• 한국식품조리과학회지
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• 제6권2호
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• pp.37-50
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• 1990

The cause and the degree of the cis to trans isomerization were investigated about soybean oil (SBO), corngerm oil (CGO), cottonseed oil (CSO), margarine (MG) and shortening (ST). All samples treated with various conditions were analyzed to determine physicochemical characteristics (AV, POV, IV, RI), fatty acid composition, total trans fatty acid content and change of trans fatty acid composition by GLC, IR and HPLC. The results were obtained as follows; 1. Physicochemical constants were changed with a gentle slope according to incubating period at 40${\pm}$2$^{\circ}C$ and physicochemical constants of margarine and shortening were changed, significiantly. 2. The saturation degree in the unsaturated fatty acid composition determined by GLC gradually were increased during incubation and heating periodically. For palmitic-and stearic acid content at the samples stored in the incubator, the saturation degrees were gradually increased. But for the case of heat treatment, they were increased more rapidly than other fatty acids. 3. Total trans fatty acid contents in each samples were determined by GLC, IR and HPLC, the amount of trans fatty acids were measured with discrepancy. It was caused by deviation of analytical instruments, methods and the kinds of samples. Trans fatty acids were measured more definitly in IR more than GLC and HPLC. On the other hand, total trans fatty acid contents in average levels for SBO, CGO, CSO, MG and ST stored for 35 days and heated for 24 hours were 1.3%, 1.1%, 0.9%, 22.6% and 13.8%, and 3.6%, 3.0%, 2.8%, 41.2% and 20.8%, respectively.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 정기총회 및 추계학술대회 논문집
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• pp.1327-1334
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• 2011

subway has became citizen's feet which can transport over 24 million people since the era of high oil price started. Because the request of passengers for more comfortable thermal comfort is drastically increasing, the importance of comfortable environment in the passenger car is more stressed. This paper suggests an indicator whether railroad car is fitted with suitable cooling and heating equipment by applying the international climatic testing method, UIC 553, 553-1. Specified ambient temperature, humidity, solar irradiation condition, as well as extreme outside condition, can be achieved by using an environmental chamber. The change temperature and humidity in the passenger space can be monitored to judge if the passenger room is nicely air-conditioned.

• 한국응용과학기술학회지
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• 제28권1호
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• pp.1-5
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• 2011

In this study, We investigated the properites of nano-emulsions containing hydrogenated lecithin prepared by high pressure homogenizer. The size of droplet of emulsions prepared by homogenizer at various rpm (rotation per minute) was not measured due to the unstability of emulsions, however, the size of droplet of nano-emulsions prepared by high pressure homogenizer was around 300 nm and the appearance of emulsions was bluish. The stability of emulsions with various lecithin concentration was tested against time. POV (Peroxide value) of emulsions were plotted against time. POVs of emulsions prepared with an egg lecithin and a soy lecithin were increased with time, however, POV of emulsion with Lecinol S-$10^{(R)}$ was kept constant within 60 hours and at $60^{\circ}C$. In consumer test, the nano-emulsion showed higher affinity regardless of skin type. Both of irritation scores of emulsions were similar.