• The Journal of the Petrological Society of Korea
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• v.8 no.1
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• pp.1-13
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• 1999

The Latite Ridge Latite in the East Tintic volcanic field, Utah in USA occurs as a welded ash-flow tuff, has 63.7-66 wt% $SiO_2$ on an anhydrous basis, and shows calc-alkaline affinities. The rocks fall in the trachyte field of IUGS classification. It is characterized by unusally high $K_2O$ content (5.9-7.6 wt%), relatively high equilibration temperature (950-973$^{\circ}C$), and biotites with high $TiO_2$ content (7.4-8.2wt%). Various differentiation processes were tested using the XLFRAC program to infer the origin of the Latite Ridge Latite. The results suggests that crystal fractionation from shoshonite is one possible process to generate the Latite Ridge Latite. Shoshonite of the East Tintic volcanic field was possibly formed by crystal fractionation from a subduction-related K-, Mg-rich mafic magma.

• Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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• 1999.11a
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• pp.205-214
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• 1999

In order to investigate the influencing factors of flotation fractionation. flotations were performed at varied conditions. The selectivity of fines fractionation is mainly affected by long fibers flocculating degree and if it were not for sufficient flocculation of long fibers, increase of long fibers loss could not be avoided. The amount of flotation reject totally depends on the stability of forth floated on the stock surface. only the small size fines stabilize the froth as they hinder the drainage of liquid lamella in flotation-froth. Two important factors of flotation conditions are improving the flocculation of long fibers and increasing the amount of flotation reject. Changing a flotation flux or an air-mixing ratio with aims of increasing the flocculation of fibers and reject ratios is in conflict. In order to satisfy the both conditions for reducing long fiber loss and for increasing flotation reject a new fractionation promoter is urgently required.

• YAKHAK HOEJI
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• v.22 no.1
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• pp.42-50
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• 1978

The plasma proteins of fresh water fishes have been fractionated by disc electrophoresis in acrylamide gels utilized as an electrophoretic supporting medium. The species of fishes examined in this experiment were Anguilla japonica, Misgurnus mizolepis, Parasilurus asotus, Siniperca scherzeri, Pelteobagrus fulvidra, Carassius carassius, Cyprinus carpio, and Hemibarbus labeo, obtained in the Han River. Disc electrophoresis was performed as described by Ornstein and Davis. Gels and buffer solution were prepared by the method developed by W.J.Kim. The separation gels were 7% acrylamide gel. The fractionation of plasma proteins showed 13 bands in Anguilla japonica, 10 in Misgurnus mizolepis, 15 in Parasilurus asotus, 12 in Siniperca scherzeri, 11 in Pelteobagrus fulvidra, 13 in Carassius carassius, 9 in Cyprinus carpio, and 13 in Hemibarbus labeo. The patterns of plasma protein on the each species of fishes were different in the number of bands, ratio of contents, relative mobilities, and forms of fractionation.

• Korean journal of food and cookery science
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• v.12 no.1
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• pp.115-121
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• 1996

Ixeris dentata Nakai (Compositae) is a perennial herb and the young shoots when prepared properly are edible as a bitter appetizing vegetable in the early spring. The whole plant has been used as a folk medicine in treating diabetes in Korea. As a part of our studies on bitter substances, we have investigated the bitterness of the plant through a taste-guided fractionation method. Bitter substances were extracted by the solvent fractionation and the bitterness was evaluated by 10 trained panelists consisted with graduate students of Dept. of Foods and Nutrition. It has been revealed that the bitter compounds were distributed throughout the extracting fractions and the higher intensity of the bitterness was seen in the n-BuOH fractions. The bitter compounds were subfractionated by the silica gel column chromatography and the bitterness was evaluated by the trained panelists. The subfractions which were indicated as the bitter compounds will be further studied to isolate the compounds. The H$_2$O fractions were grouped according to the molecular weight through the ultrafiltration and the group with 1,000 < m.w. < 30,000 was evaluated as the most intense bitter subfraction.

• 한국생물공학회:학술대회논문집
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• 2002.04a
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• pp.515-518
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• 2002

The method of foam fractionation can be applied to enrich proteins from a dilute protein solution if the proteins are hydrophobic and foam. If a protein, such as invertase, is hydrophilic, a dilute solution containing this protein may not foam. In that case, a batch foam fractionation process may not be appropriate for recovering a concentrated solution of that protein. In this paper, various concentrations of invertase were added to a dilute solution containing bromelain (a hydrophobic protein), in order to determine how the presence of a hydrophilic protein can affect the recovery of the desired hydrophobic protein. The effect of invertase on bromelain recovery was studied here at an initial bulk solution pH of 5 and an air superficial velocity of 4.6 cm/s.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.6
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• pp.807-813
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• 2004

Wastewater was treated by two different treatment processes; activated sludge process and advanced wastewater treatment process (KNR process) using lab-scale experiment. Two treated wastewater showed good treatment efficiency of organic matter removal, up to 90% removal. Nitrogen and phosphorus were not effectively removed though activated sludge process, while KNR process showed good removal efficiency of nitrogen and phosphorus; 56% nitrogen removal and 95% phosphorus removal. KNR process showed better removal efficiency of organic matter, nitrogen, and phosphorus compared to activated sludge process. Organic matter characterization was tracked though measurement of UV scan, SUVA, and XAD fractionation. Treated wastewater showed higher SUVA value than wastewater influent, indicting less aromatic characteristic of organic matter. XAD fractionation showed hydrophilic fraction decreased though wastewater treatment, suggesting microbes preferentially digest hydrophilic and aliphatic molecules rather than hydrophobic and aromatic molecules of organic matter.

• Journal of Korean Society of Water and Wastewater
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• v.17 no.4
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• pp.503-509
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• 2003

COD fractionation of primary settled municipal wastewater was conducted by respirometry. RBCOD (Readily Biodegradable COD) fraction was analyzed to be 21% of influent TCOD. However, SCOD fraction, analyzed by physical separation using $0.45{\mu}m$ membrane filter, was about 31% of TCOD. Therefore, 10% of soluble inert COD was comprised in TCOD. It means that kinetic analysis of activated sludge system was impossible because serious error would be occurred if SCOD was used as a biodegradable soluble component instead of RBCOD estimated from respirometry. In this study, RBCOD fraction of raw wastewater could be analyzed by respirometry within the error range of 57%. In addition, SBCOD (Slowly Biodegradable COD) content could be determined by kinetic simulation of the experimental results. SBCOD showed about 2-fold higher fraction (38% of TCOD) as compared with RBCOD.

• Culinary science and hospitality research
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• v.10 no.1
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• pp.46-63
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• 2004

The service quality factors which causes an effect in restaurant selections appeared with gain and loss factors of essence and the customers. The restaurant recommendation factor was appeared with shedding of blood characteristics. The research which sees Korean-style food party's decision making is difficult with the plan of the security and loyalty of customers presented. The marketing strategy for the customer loyalty of Korean-style food party will be able to be overcome. The critical point of the research which sees for the security of the loyalty customer selects a target market, and the strategy which invades intensively is necessary. The Korean-style food party decision may cause the customer fractionation anger which follows in market fractionation anger. It does not become accomplished from the research which sees but with the critical point of research to appear, the research of creation of the loyalty customer who applies a market fractionation anger necessity will be becomes feed with hereafter research subject.

• Proceedings of the Korean Powder Metallurgy Institute Conference
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• 2006.09a
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• pp.312-313
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• 2006

The primary aim pursued by the preparation of separation membrane is the preparation of the membrane thin as well as with no defect. The field-flow fractionation deposition is a new molding technology which can overcome the traditional disadvantages such as multi-preparation to the preparation of great area of separation membrane with no defect. Therefor the mainly ingredients which influence the appearance and performance of titanium membrane layer are investigated by scanning electricity mirror (SEM) as well as porous material testing instrument: powder performance prepared and confected; selection of supporting body; sintering system such as temperature and time. It is shown that the membrane thickness can be controlled at $50{\mu}m$ or so; the filtration precision mainly rests with powder performance and selection of supporting body and little sintering system

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.8
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• pp.3774-3778
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• 2012

A dynamic simulation of a fully thermally coupled distillation is conducted for the design of a possible operation scheme, and its performance is examined with an example process of reformate fractionation process. The outcome of the dynamic simulation indicates that the column can be operated by using a $3{\times}3$ control structure. The structure consists of three controlled variables of the compositions of overhead, side products and bottom and three manipulated variables of the flow rate of reflux, liquid split ratio between a main column and a prefractionator and steam.