• Korean Journal of Food Science and Technology
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• v.22 no.7
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• pp.805-811
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• 1990

Hydrolysis of soybean proteins was carried out by immobilized trypsin and/or alpha-chymotrypsin. The partially hydrolyzed products of soybean proteins were evaluated for their molecular weights and molecular charges by using Ferguson's plot. The ratio of average molecular weights to average molecular charges($\bar{M}/log\;\bar{Y}_o$) of modified soybean proteins could be used to predict functional properties such as solubility, water holding capacity, oil holding capacity, and emulsifying ability. The low ratio of modified soybean proteins indicated high solubility. while the high ratio showed high water holding capacity. The appropriate ranges of the ratios were necessary for maximun oil holding capacity and emulsifying ability.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2019.11a
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• pp.27-28
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• 2019

In this study, the characteristics of compressive strength of ultra high strength concrete supplied with moisture from outside by vacuum water absorbing curing method were investigated. Specimens were prepared by replacing the binder(Silifa fume and GGBS) by 25 wt% with respect to the weight of cement at W/B 0.16. Each specimen was subjected to water Vacuum absorbing curing time 0 min, 30 min, 60 min, 90 min and 120 minutes immediately after the demolding. Curing was performed at $20^{\circ}C$ Air-dry curing, $90^{\circ}C$ steam curing, $90^{\circ}C$ steam curing and $180^{\circ}C$ autoclave curing. Experimental results showed that water absorbing degree increased with increasing water absorbing curing time, and BS25 sample had higher water absorbing degree than SF25 sample at same time. Compressive strength tended to increase up to about 40% in water absorbing degree, but compressive strength decreased again in water absorbing more than 40%.

• Korean Journal of Animal Reproduction
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• v.20 no.1
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• pp.27-34
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• 1996

The objective of this study was to examine the cell number of Total, ICM and TE cells of bovine blastocysts according to development progression cultured in CR1 medium, which was reported as successfully supporting medium for preimplantaion bovine embryo development to the blastocyst stage, by differential labelling of the nuclei with immunosurgery and polynucleot-ide-specific fluorochromes. Blastocysts were obtained at day 8 after in vitro fertilization and classified to early, middle, expanded stage according to the developmental morphology; blastocoel expansion and zona thickness. Also, bias tocysts in the same category were divided into two parts to check the Total cell number by using bisbenzimide only and ICM, TE and Total cell number by using immunosurgery and two polynucleotide-specific fluorochromes. 1) The development rate of blastocysts at day 8 after in vitro fertilization was 29.3% and classified bIas tocysts to early, middle, expanded and hatching stage were 8.7, 9.9, 7.6 and 3.1%, respectively. 2) The numbers of total blastomere using bisbenzimide in the classified blastocysts to early, middie and expanded were 46.9${\pm}$8.6, 66.2${\pm}$12.5 and 122.8 ${\pm}$ 14.4, respectively. This indicated that CR1 is a appropriate culture medium for bovine embryo development. 3) The count of ICM and TE cell number by using differential labelling with immunosurgery and polynucleotide-specific fluorochromes in the classified blastocysts to early, middle and expanded; ICM cell numbers of were 12.8${\pm}$5.9, 26.3${\pm}$8.4 and 35.5${\pm}$15.0, respectively and TE cell numbers were 30.5${\pm}$5.0, 4 41.3${\pm}$8.2 and 81.1${\pm}$13.4, respectively. These results presented that the increase of ICM and TE cell numbers averaged two and three doublings between early and expanded blastocyst stage and also total cell number counted from ICM nuclei and TE nuclei by using differential label-ling showed the increase pattern with development advance level and the results were similar to total cell number obtained from bisbenzimide treatment only. Therefore, the differential labelling of ICM and TE nuclei in situ is a very useful technique to evaluate embryo qualities and can be used as an indicator on study of preim-plantation embryo development.

• Clean Technology
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• v.26 no.3
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• pp.177-185
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• 2020

All coal ash, generated from coal-fired power plants, is entirely dumped onto a landfill site. As coal ash contains 80% fly ash, a clean floating process was developed in this study to recover useful components from coal ash and to use them as high value-added industrial materials. When the unburned carbon (UC) was recovered from the fly ash, soybean oil, an eco-friendly vegetable oil, was used as collector instead of a non-ionic kerosene collector to prevent the occurrence of odor from the kerosene. After the UC was separated by flotation, particulate ceramic microsphere (CM) was recovered, without generating acidic wastewater, through hydro-cyclone instead of sulfuric acid solution in order to separate ceramic microsphere (CM) and cleaned ash (CA) from the residue. By utilizing soybean oil as a collector, the recovery rate of UC turned high at 85.8% due to the increased adsorption of UC, the high viscosity of soybean oil, and the increase in floating properties caused by the linoleic acid contained in soybean oil. All of the combustible components contained in the recovered UC were carbon components, with the carbon content registering high when soybean oil was used. The recovered UC had many pores with a rough surface; thus, it could be easily ground and then used as an industrial material for its fine particles. The CM and CA recovered by the clean separation process using hydro-cyclone had a spherical shape, and the particles were clearly separated without clumping together. The average diameter (D₅₀) of the particles was 5 ㎛, so it was possible to realize the atomization of CM through a process change.

• Korean Journal of Veterinary Research
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• v.32 no.1
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• pp.117-125
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• 1992

Dogs were divided into 3 groups of two each; Bacillie Calmette-Guerin(BCG) pretreatment, M bovis only treatment and uninfected control group. BCG were vaccinated intradermally with 0.2ml before 3weeks of M bovis intraperitoneal infection. Infection at necropsy 4months later was readily in the both treated dogs. Histopathologically, the BCG pretreated dogs produce the moderate accumulation of macrophages and focal granuloma formation in the lung, whereas the M bovis only treared dogs produce the accumulation of predominantly macrophages, occasionaly polymorphonuclear cells and the more larger granuloma Bronchoalveolar lavage(BAL) was obtained and total and differential cell counts were examined. Total number of BAL cells harvested from uninfected dogs is lower compared with those of the both treated groups. The total cell number of M bovis only treated dogs were singificantly higher 1.8 times than that of the BCG pretreated dogs. The Fe receptor activity and the growth of organism in alveolar macrophages obtained from BCG pretreated dogs were compared with that in macrophages from M bovis only treated dogs. BCG vaccination resulted in substantial macrophage activation, measured as increased Fc receptor mediated phagocytosis and rosette formation, as wells as the inhibition of intracellular mycobacteria multiplication. However, actibated macrophages taken from BCG pretreated dogs are incapable of killing the M bovis. Thus, these results suggest that BCG pretrearment in the dog may produce a protective effect against tuberculosis because active alveolar macrophages have acquired antituberculous immunity, although few mycobacteria within the lung remain in a metabolically active state.

• Resources Recycling
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• v.22 no.6
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• pp.64-72
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• 2013

The purpose of this study is to confirm the possibility of obtaining high grade coal from 57.39% of fixed carbon fine coal. Also, the mineralogical, physical/chemical and liberation characteristics are to be identified to decrease in ash amount, during the pre-processing of clean coal technology. In this study, batch flotation and CPT column flotation proper for the processing of fine particles were used with the variation in kinds and quantity of frother, collector and depressant. Also air flow rate and feeding rates were examined. As a result of batch flotation using 20% of pulp density DMU 101 collector(100 mL/ton), AF65 frother(300 mL/ton), sodium metaphosphate depressant (1 kg/ton), 67.57% of ash rejection and 70.90% of combustible recovery were obtained. The result of CPT column flotation was 85.59% of ash rejection and 88.97% of combustible recovery under the conditions of 5% of pulp density, DMU-101 collector (100 mL/ton), AF65 frother(10 L/ton), SMP depressant(1 kg/ton), wash water(100 mL/min.) and air flow rate(1,200 mL/min.).

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2001.05a
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• pp.442-443
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• 2001

강진만은 삼천포수도, 노량수도와 지족수도를 통하여 유입되는 조류(tidal current)에 의해 해양생태계의 구성인자들이 영향을 받고 있다. 이중 강진만북부 입구와 만에서는 피조개와 굴양식이 활발히 행하여지고 있는 해역이다. 또한, 삼천포수도와 노량수도 입구에는 삼천포 하동화력 발전소가 위치하여 직, 간접적으로 온배수의 영향이 이들 해역의 생산력에 영향을 미칠 수 있으므로, 강진만의 일대 주변해역 식물플랑크톤의 현존량 및 군집구조로 이들 영향을 조사하였다. (중략)

• Resources Recycling
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• v.21 no.5
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• pp.44-49
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• 2012

In this study, the sonication method was applied to remove ink from old newspaper(ONP) using flotation. Results indicated increased whiteness and effective residual ink concentration (ERIC) with longer disintegration. Therefore 58% of whiteness and 182.9 ppm ERIC were obtained for 30 minutes of disintegration time without the change in yield. Longer disintegration than 30 minutes had no effects on whiteness without the application of ultra-sonication. On the other hand, higher than 58% of whiteness was achieved in 2 minutes of disintegration when the ultra-sonication was applied. The highest whiteness (59.32 %) was obtained by applying sonication for 20 minutes and froth flotation with kerosene as a collector under the alkaline condition (pH 11).

• Journal of Korean Society of Forest Science
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• v.72 no.1
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• pp.37-44
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• 1986

Seasonal changes of water relations parameters were obtained from p-v curves in leaves of Quercus grosseserrata and Quercus acutissima. The osmotic pressure at full hydration, ${\pi}_o$, and osmotic pressure at incipient plasmolysis, ${\pi}_p$, were high in newly emerged leaves but decreased with leaf development in each of the species. Water deficit at turgor loss was 10 to 20% in each of the species during the growing season. Maximum bulk elastic modulus in cell walls at full turgor, Emax, rises rapidly with leaf development before senescence in each of the species. Seasonal change of number of osmoles solute in symplasm per dry weight, Ns/DW, was higher in Quercus grosseserrata leaves than Quercus acutissima leaves, while relative water content (Vp/Vo, $RWC^*$, Vo/Vt) was relatively constant in each of the species.

• Resources Recycling
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• v.25 no.6
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• pp.98-104
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• 2016

The purpose of this study is to obtain an optimum condition of the concentrate by floatation using Australian low grade copper ore of suitable particle size by crushing, grinding and sizing. The effect of the dosage of collector, activator, depressant and change of acidity on the floatation was investigated. The floatation conditions comprising of pH 9.0 acidity, 500g/t $CuSO_4{\cdot}5H_2O$ activator, 500g/t K.E.X. collector, 1500g/t $Na_2SO_3$ depressant and 25wt.% plup density were optimized. Grade and recovery of copper in the concentrate obtained by froth floatation under optimum conditions were 4wt.% and 65wt.% respectively.