• Tribology and Lubricants
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• v.4 no.1
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• pp.30-35
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• 1988

Liquid crystals have some tribologically favorable lameliar structure. The Performance of ther mottopic liquid crystal was investigated under elastohydrodynamic condition in terms of traction and film thickness. It exhibited low traction and very thin film thickness, which were almost constant over the entire speed range measured. It was also found to have sealing effect like grease. This work has shown that there exists "potential" for using liquid crystals as lubricants.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.8 no.12
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• pp.1-6
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• 1985

The purpose of this study is to consider the criteria for decision-making of facility location in view of Minimax. As an illustration of the location of storerooms in a manufacturing plant that minimizes the maximum distance workers must travel to reach a storeroom, the number and variety of location problems that can be formulated appropriately as minimax problems are sizable. A minimax solution can be interpreted as a grease the squeaky wheel solution In solving a minimax location problem, costs other than the maximum cost are not considered.

• Applied Chemistry for Engineering
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• v.30 no.5
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• pp.523-529
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• 2019

In this study, we investigated the pretreatment technologies of volatile organic compounds (VOCs) which is a problem as the semiconductor and display industry develops recently. The conventional concentrator used in the direct combustion system, is easily contaminated by the exhaust gas in the manufacturing process of the display, resulting in the low treatment efficiency of generated VOCs. Physical/Chemical analyses of the exhaust gas showed high boiling point and viscosity in addition to a large amount of molecular weight alcohols and oil components. In this study, we tried to treat degrading materials by using the heat exchanger in a pretreatment facility and some materials degrading the concentrator were condensed more than 90%. In addition, it was also confirmed that an auxiliary device of the grease filter could remove the redispersion polymer oil from the heat exchanger.

• Analytical Science and Technology
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• v.15 no.1
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• pp.54-66
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• 2002

In order to study systematic survey of Kumho river pollution, water analysis for 24 items was conducted at 16 sites surrounding the Kumho river system for 3 times from May 2000 to February 2001. Analytical items for the study of water quality are as follows; water temperature, pH, BOD, COD, DO, SS, electrical conductivity, oil & grease, ABS, phenol, T-P, ${PO_4}^{3-}-P$, T-N, $NH_3-N$, ${NO_2}^--N$, ${NO_3}^--N$, Cu, Zn, Cr, Cd, Mn, Fe, Pb and As. The mean values obtained for water temperature, pH, BOD, COD, DO, SS, electrical conductivity, oil & grease, ABS, phenol T-P, T-N, Cu, Zn, Fe and Mn showed $17.84^{\circ}C$, 8.04, $2.54{\mu}g/mL$, $5.64{\mu}g/mL$, $7.07{\mu}g/mL$, $8.75{\mu}g/mL$, $600.4{\mu}S/cm$, $0.19{\mu}g/mL$, $0.015{\mu}g/mL$, $0.29{\mu}g/mL$, $0.21{\mu}g/mL$, $5.22{\mu}g/mL$, $0.005{\mu}g/mL$, $0.007{\mu}g/mL$, $0.044{\mu}g/mL$ and $0.001{\mu}g/mL$ respectively. As, Cd, Cr and Pb are not detected. The mean concentration of phenol, $NH_3-N$ and $NO_2-N$ were found to be increased compared to the prior study for 3 years from January 1997 to December 1999, that of BOD, COD, SS, oil & grease and ABS were found to be decreased and the others are nearly constant. The effect of Kumho river to the Nakdong river pollution are as follows. The mean concentration of BOD changed from $1.07{\mu}g/mL$ to $1.42{\mu}g/mL$ before and after of introducing of Kumho river water respectively. The mean concentration of COD, electrical conductivity, oil & grease, ABS, phenol, T-N and T-P changed from $1.99{\mu}g/mL$, $221{\mu}S/cm$, $0.15{\mu}g/mL$, $0.006{\mu}g/mL$, $0.06{\mu}g/mL$, $2.21{\mu}g/mL$ and $0.08{\mu}g/mL$ to $2.44{\mu}g/mL$, $392{\mu}S/cm$, $0.16{\mu}g/mL$, $0.015{\mu}g/mL$, $0.07{\mu}g/mL$, $2.81{\mu}g/mL$ and $0.19{\mu}g/mL$ respectively.

• Tribology and Lubricants
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• v.22 no.6
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• pp.335-341
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• 2006

This paper reports the wear characteristics of two types of coating materials, which are $Cr_2O_3$ and $ZrO_2$, by coated plasma thermal spray method. The wear test was carried out under air, grease, and bearing fluid conditions. The wear testing machine of a pin-on disk type were used to measure friction forces, friction coefficients and the weight losses of the coating specimens on the various sliding velocity and loading condition. The wear surface of specimens were observed by scanning electron microscope (SEM) photographs.

• 보존과학연구
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• s.7
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• pp.292-303
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• 1986

The purpose of this paper is to select the suitable resin as changed in environmental and ingredients, in the conservation of metallic objects. Disposal way of metallic objects were used to various resin and grease which will must be well selected in the nature of relics. The contents of this report are summed up as follows ; The resins of Incralac, Ruscoat, wash primer, Amerlock-400 wrer coated on the slice of ironware (5% saltspray test on the view of nature & Adherence). After the coating, add increasing speed to a corrosion rate, and then the adherence of resins were tested. In this study corrosion test, 0.10-0.25% Amerlock-400 jis proved to be a rare one of corrosion rate and 1.0-2.5% Wash primer is found to be a plenty one of corrosion area.

• Journal of the Korean Academy of Esthetic Dentistry
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• v.13 no.2
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• pp.7-11
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• 2004

The Schwachman-Diamond syndrome is an autosomal recessive syndrome(1/20,000 births), consisting of pancreatic insufficiency, neutopenia, which may be intermittent, neutrophil chemotaxis defects, metaphyseal dysostosis, failure to thrive and short stature. Patients present in infancy with poor growth and grease, foul-smelling stools that are characteristic of malabsorption. These children can be readily differentiated from those with cystic fibrosis by their normal sweat chloride levels, lack of the cystic fibrosis gene, and characteristic metaphyseal lesions. Pathologically, the pancreatic acini are replaced by fat with little fibrosis. The neutropenia may be cyclic. Recurrent pyogenic infections otitis media, pneumonia, dermatitis(fig 1), sepsis are common and a frequent cause of death. In dental examination, these patients had a poor oral hygine and moderate generalized marginal gingivitis, also show delayed primary tooth exfoliation and oral development. This report illustrates a case that pancreatic agenesis 6 yeas-old boy with various esthetic dental problems has been served the esthetic dental restoration of 6 years.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.11a
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• pp.169-170
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• 2012

It is analyzed that constructability of post-tensioning system applying HDPE greased strand that is greased and coated by high density polyethylene on a bare strand in reactor containment building. The improvement of corrosion resistance by greasing and HDPE coating on a strand makes transportation, handling and installation of tendon to be easier. Therefore, serial and repetitive process of post-tensioning composed of construction preparation, tendon installation, stressing and anchoring, grease injection could be improved parallel and lumping process of installation and grouting, stressing and anchoring.

• Tribology and Lubricants
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• v.22 no.5
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• pp.282-289
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• 2006

This paper is to investigate the wear behaviors of two type ceramics, $Al_{2}O_{3}\;and\;TiO_{2}$, by coated plasma thermal spray method under the lubricative environment. The lubricative environments are grease fluids, a general hydraulic fluids, and bearing fluids. The wear testing machine used a pin on disk type. Wear characteristics, which were friction force, friction coefficient and the specific wear rate, according to the lubricative environments were obtained at the four kinds of load and sliding velocity is 0.2 m/sec. After the wear experiments, the wear surfaces of the each test specimen were observed by a scanning electronic microscope.

• Korean Journal of Poultry Science
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• v.26 no.2
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• pp.97-108
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• 1999

The consumer demands for quality of meats has become diverse in recent years. The present paper describes mainly the technology to improve the broiler meat quality with special reference to reducing fat contents in edible meats which is the heart of the quality constraints. Abdominal fat deposition in broilers was reduced by feeding of medium-chain triglycerides(MCT), suggesting MCT feeding is useful to produce broiler meat with low fat content. A phase feeding system to aim at improving meat quality that is mainly comprised with partial replacement of dietary protein into phase during 4∼6 weeks increased edible meat yields and reduced abdominal fat deposition and fat contents in breast and thigh meats. Whiteness of fat tissue was intensified by feeding beef tallow or lard in place of yellow grease. Feeding Phaffia yeast containing astaxanthin increased redness of breast and thigh meats and improved visual appearance of meats which may be preferential for consumers. Feeding fish oil reduced abdominal fat deposition and increased EPA and DHA contents of fat tissues. These procedures could be used for manipulation of meat quality to meet consumer demands.