• 한국산업융합학회 논문집
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• 제16권3호
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• pp.95-102
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• 2013

It is indispensable to modern society metal processing since the industrialized rapidly, but it is a metalworking cutting fluid immediately. In addition, this means selecting a emulsion on the basis of quality criteria processing method, the material of the material, cutting depth, cutting speed, Djourou fence Liang, and surface roughness, cutting oil, the shape of the device based on the emulsion, I will be the structure of the tank, filtration equipment also changes. In particular, acting bacteria is now breeding in response to the passage of time due to metal ion degradation due to heat generated hydraulic fluid leakage, humidity tung, during processing, seep from processing material at the time of processing the water-soluble cutting oil for generating the malodor by dropping significantly the performance of the cutting oil to corruption from, sometimes by introducing various additives to suppress spoilage in advance. In this study, we expect the effect of the cost reduction in the extension of fluid replacement cycle through the application of the management apparatus and deep understanding in the management of cutting fluid, the working environment through the understanding and interest of workers in the production site more than anything I try to become useful for the improvement.

• 한국식품과학회지
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• 제22권3호
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• pp.300-306
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• 1990

마요네즈 저장 중 미세구조의 변화를 광학현미경과 주사 전자현미경으로 관찰하였다. 신선한 마요네즈는 다양한 크기의 지방구로 이루어져 있었으며 지방구의 크기 분포는 정규분포를 보였다. $60^{\circ}C$와 $-10^{\circ}C$에서 저장하는 동안 지방구의 합일(合一)에 의해 지방구가 커지는 경향을 보였으며, 탁도에 의한 실험결과 또한 이러한 지방구의 합일(合一)현상을 확인시켜 주었다. 전자현미경은 광학현미경에 비해 크기가 작은 지방구를 측정하기가 용이하였으며, 따라서 지방구의 평균 입경이 작았다. 이것은 전자현미경의 높은 해상력과 심도 때문이며, 더욱이 시료를 회석할 필요가 없어 균일한 지방구의 분포를 보여주는 전자현미경 방법은 광학현미경에 비해 유화제품의 지방구 분포를 측정하기에 유리한 방법이라 하겠다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2003년도 학술.기술논문발표회
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• pp.35-38
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• 2003

The purpose of this study is to investigate the manufacture of light weight concrete panel using the artificial light-weight aggregate as a part of the substitution of foamed styrene and polyurethane because of narrow allocable temperature Bone in use. The experimental parameter of this study is 40, 60 and 8$0^{\circ}C$ of curing temperature at 100% relative humidity and the type of admixture such as cement, 6mm glass fiber and St/BA emulsion. Testing item is compressive and flexural strength and strength of specimen cured at standard condition is compared to that of specimen cured at 40, 60 and 8$0^{\circ}C$ of curing temperature at 100% relative humidity. As a result or this, it was revealed that the maximum or strength is developed in 6$0^{\circ}C$ or cure temperature at 100% relative humidity in case of the most of the specimen. Specimens modified by St/BA emulsion show the highest development of strength dependent on the curing tmeperature. So, it seems to be effective that evaporation curing method shoud be considered to curing the specimen as the panel core.

• 한국안전학회지
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• 제7권3호
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• pp.22-29
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• 1992

Emulsion-type cometics contain many kinds of carbon and energy source i.e., vegetable oil, mineral oil and carbohydrate etc., those can be used as nutrients and caused contamination by microbials. Thereby we have to keep cosmetics from the possibility of contamination by microbials. From this viewpoint, the purpose of this study is to get the data necessary not only to prevent dermatopathia occurred by microbials but also to sustain the quality. In this experiment, we observed how many Staphylococcus aureus were grown in the prepared cosmetics with or without antiseptics so as to prevent contamination. When the contamination proceed, the stability of phase was disturbed and creaming phenomina was happened with some discoloration and bad smell. About 40 days after, the pH was changed from 7.6 to 6.5 and the refractive index of cosmetic raw materials were changed from 1.4415 to 1.4490(water : oil=70:30). By adding antiseptics Into prepared cosmetics, the number of Staphylococcus aureus with challenge test method were decreased to 7$\times$103 cell/ml. For the antibacterial effect against Staphylococcus aureus, p-hydroxy benzoic acid propyl ester in phosphoric acid buffer solution was the best.

• Archives of Pharmacal Research
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• 제19권1호
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• pp.30-35
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• 1996

Poly(l-lactic acid)(PLLA) microspheres loaded with ampicillin sodium (AMP-Na_, .betha.-lactam antibiotic, were prepared by a w/o/w multiple emulsion-solvent evaporation method. The amounts of each component in three phases (inner water phase, organic phase, and outer water phase) wre carefully examined in the preparation of PLLA microspheres. The stirring rate, another preparation parameter, was also investigated for study on the effect of mechanical stress on the drug loading and morphology of PLLA microspheres. Most of the preparation parameters had a great influence on the drug loading, surface morphology and size distribution of PLLA microspheres. PLLA microspheres with 15.89 w/w% drug loading were subjected to the in vitro release experimet. The release of ampicillin sodium was constant at a rate of 1.68 $mug/ml/day$ per 1 mg of microspheres for 18 days initial burst effect.

• Preventive Nutrition and Food Science
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• 제15권4호
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• pp.249-254
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• 2010

We examined the effect of extracts of meju prepared with traditional and standardized methods on pancreatic lipase and the absorption of dietary lipid. Aqueous methanolic (80%, v/v) extracts of meju dose-dependently inhibited the activities of porcine pancreatic lipase. The plasma triglyceride levels in Imprinting Control Region mice after a single oral administration of lipid emulsion containing aqueous methanolic extracts from meju made by the standardized methods were lower than that of the group given a lipid emulsion containing the extracts of meju made by traditional methods. The inhibitory activity of the meju extract on dietary lipid digestion appears to be more closely associated with aglycone forms of phenolic compounds such as free isoflavones than with glycosides, since meju samples with higher total phenolic or free isoflavone content showed the stronger inhibition against pancreatic lipase. Furthermore, the data suggest that meju made using the standardized method, which contains higher levels of total isoflavones relative to traditionally prepared meju, could effectively suppress digestion of dietary lipids and therefore have the potential to help ameliorate hyperlipidemia and obesity.

• 한국식품과학회지
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• 제6권1호
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• pp.42-54
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• 1974

국내에서 널리 이용되고 있는 26종(種)의 식품을 물리적(物理的) 성상(性狀)에 따른 Oldfield 등의 방법으로 분류하고 General Foods사(社)의 Texturometer에 의하여 그들의 특성(特性)을 측정하였다. 그 결과 gel 상(狀) 식품(食品), 불균일(不均一) gel 상(狀) 식품(食品), 지방(脂肪) emulsion 상(狀) 식품(食品), 세포조직상식품(細胞組織狀食品), 섬유상식품(纖維狀食品), 공극고체상(空隙固體狀) 식품(食品)에 따라 측정최적조건, texturometer curve 및 특성치가 다름을 확인하였다. 각 식품(食品)의 texture 특성은 동일한 제품사이에서도 다양성을 보여주고 있었으며 특히 공극고체상(空隙固體狀) 식품(食品)에서 가장 심한 차이를 나타내었다.

• Elastomers and Composites
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• 제35권3호
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• pp.188-195
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• 2000

Host Polymer인 Poly(acrylonitrile-co-butadiene) (NBR)과 전도성 고분자인 Polypyrrole (PPY)과의 복합체를 유화 중합법으로 제조하였다. 여러 가지의 유화제 중에서 dodecyl sodium sulfate (DSS)를 사용하여 중합하였을 때 복합체의 전기전도도가 가장 높게 나타났다. 복합체 필름은 압축성형법으로 제조되었으며 복합체의 전기전도도는 전도성고분자의 함량과 온도에 따라 4단자법으로 측정되었다. 제조된 복합체의 전기전도도는 PPY 함량이 25wt%일 때 1.17S/cm까지 증가되었으며 percolation threshold는 PPY의 함량 l5wt% 근처에서 나타났다.

• 공업화학
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• 제22권4호
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• pp.444-446
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• 2011

계면활성제(polyvinylpyrrolidone, PVP)와 개시제(benzoyl peroxide, BPO)를 95% 알코올을 용매 속에 첨가하여 styrene monomer로부터 나노 크기의 균일한 분포 영역을 갖는 polystyrene (PS)을 제조하였다. Emulsion polymerization방법을 사용하였으므로 중합과정에서 PS입도 크기에 많은 변수가 영향을 미칠 수 있다. 본 연구에서는 단량체, 계면활성제 및 개시제 등의 농도 영향은 배제하고 가장 큰 변수들로 고려되는 교반 속도와 초음파 조사시간의 영향을 주로 연구하였다. 초음파 조사시간을 조절한 결과 400 nm의 나노 크기를 갖는 PS 입자를 제조할 수 있었다.

• Journal of Microbiology and Biotechnology
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• 제9권6호
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• pp.773-777
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• 1999

Scale-up experiments for hydrolysis of beef tallow, fat, and palm kernel with lipase derived from Candida cylindracea were carried out in 1-1, 100-1, and 10,000-1 reactors. The optimum agitation speed for the hydrolysis of the 1-1 reactor was investigated and found to be 350rpm, and this was a basis for the scale-up of agitation speed. The hydrolysis system in this work was the oil-water system in which the hydrolysis seems to process a heterogeneous reaction. An emulsion condition was the most important factor for determining the reaction rate of hydrolysis. Therefore, the scale-up of agitation speed was performed by using the power n = 1/3 in an equation of the rules of thumb method. The geometrical similarity for scaling-up turned out to be unsatisfactory in this study. Thus, the working volume per one agitator was used for the scale-up. In the case of scale-up from a 1-1 reactor to a 100-1 reactor, the hydrolysis of palm kernel was very much scaled-up by initiating the rules of thumb method. However, the hydrolysis of fat and beef tallow in a 100-1 reactor was a little higher than that of the 1-1 reactor because of the difference of geometrical similarity. The scale-up of hydrolysis from the 100-1 reactor to the 10,000-1 reactor was improved compared to that of the 1-1 to 100-1 reactor. The present results indicated that the scale-up of hydrolysis in the oil-water system by the rules of thumb method was more satisfactory under the condition of geometrical similarity. Even in the case where geometrical similarity was not satisfactory, the working volume per one agitator could be used for the scale-up of a heterogeneous enzyme reaction.