• 유학연구
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• v.48
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• pp.311-331
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• 2019

The problem of temperament is not much of importance in Philosophical discussion compared to subjects such as liqi and Xingli. However, temperament is of great importance in practical study theory. "The reason people study is because they want to change their temper." the scholars said. The theory of change in temperament in neo-Confucianism is pursued in two directions. The first is to purify the temperament in a clear state. The second is to overcome the bias of temperament and lead it to a state of the middle path. The former is the study that purifies the murky water and turn it to a clear state, as the bead in it is brilliantly revealed. The latter is the study of maintaining without bias toward the path of nature itself. While the ultimate purpose of temperament change is to realize bright nature intact without obstruction of temperament, it goes through two processes specifically. It is to maximize intellectual and practical ability and overcome bias in inclination and character. The purification of temperament and the realization of Zhong are in sync with the orientation of the theory of temperament change.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.389-390
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• 2003

최근에는 실내공기질에 관한 관심이 매우 높아지고, 주거 공간의 재실자들은 좋은 실내환경에서 거주하고 싶은 기대감이 증가되면서 실내환경 개선을 위한 노력과 함께 그 중요성을 새로이 인식하고 있다. 특히, 인간이 실내에서 생활하는 시간이 하루 중 90 % 이상을 차지하며, 실내공기가 오염될 경우 쉽게 정화되지 않아 Sick House 등 재실자들의 건강을 위협하기 때문에 이에 대한 대책 마련이 시급하다. 본 연구는 실내공기 중의 주요 문제로 인식되고 있는 악취성 물질의 효과적인 제어를 위하여 광화학 반응이 적용되는 필터 시스템을 개발하고자 하였다. (중략)

• Proceedings of the KSR Conference
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• 2006.05b
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• pp.115-120
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• 2006

• Microbiology and Biotechnology Letters
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• v.20 no.4
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• pp.477-482
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• 1992

A bacterial strain Acinetobacter calcoaceticus was examined for its ability to degrade fats, oils and hydrocarbons, and tested for the possibility of application in wastewater treatment. All fats and oils tested were degraded by the strain. About 60% of hexadecane, 26% of fish oiL and 40-54% of vegetable oils were consumed respectively in shaking-flask culture. Saturated fatty acid compositions were about 55% in fish oil and 6-12% in vegetable oils. Increases in cell mass were accompanied with decreases in the concentrations of carbon sources. When jar fermentor in place of shaking-flask was used as a culturing vessel. above 80% of all carbon sources was consumed and yield of cell mass was improved to nearly 1.00. Synthetic wastewaters containing 3% of fat, oil, or hydrocarbon as a sale ca,bon source were treated sequentially with A. calcoaceticus first and then exposed to activated sludge. The concentrations of carbon sources were decreased below 0.06% through the process, and the concentrations of suspended solids were lower than 53 mglml. The data imply the potential use of A. calcoaceticus in wastewater treatment.

• Journal of the Korean GEO-environmental Society
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• v.15 no.5
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• pp.39-46
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• 2014

The objectives of this study were to determine biodegradation and characteristics of BTEX and MTBE under aerovic-anaerobic conditions and evaluate the potential of natural attenuation method in denitrifying condition.. In the single-substrate experiments, all of the BTEX compounds were degraded under all the conditions. but, lower degradation of benzene and p-xylene were observed under aerobic condition due to the lack of oxygen initially supplied. In the mixed-substrate experiments, BTEX degradation was delayed compared to that in the single-substrate experiments due to a competition of the substrates. Biodegradation of MTBE was observed only under denitrifying conditions and we expected that MTBE mineralized to $CO_2$ without the accumulation of TBA. We also conducted to determine the effect of initial nitrate concentration on BTEX and MTBE degradation. At low nitrate concentration (<50 mg/L), BTEX degradations were limited by the lack of electron acceptor and BTEX degradation was inhibited at high nitrate concentration (>200 mg/L). The results in this study indicated that biotransformation could be applied to the gasoline-contaminated region under aerovic-anaerobic.

• Journal of the Korean Society of Food Science and Nutrition
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• v.19 no.3
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• pp.215-218
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• 1990

Saturation growth model was evaluated to predict the formation of product as a function of time. Good agreement was observed with homogenous and heterogenous reactions, Prediction of product yield can be made reasonably using this model. In addition accuracy of measured values can be roughly evaluated by this model. User-friendly computer program in BASIC was written to evaluate the constants Pmax and K as well as averages of relative errors.

• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.31 no.6
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• pp.19-23
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• 2002

최근 사회는 첨단산업화 속에서 국민생활의 질적 향상과 인구의 도시 집중화 현상에 따라 많은 사람들이 직장 및 작업현장에서 건강에 영향을 미치고 작업능력의 저하를 유발하는 각종 유해물질이 점차 증가하고 있다. 또한 장기간에 걸쳐 호흡기질환을 일으키는 도시의 대기오염은 매우 심각한 사회적문제로서 관심의 대상임에도 불구하고 이에대한 대책이 미흡한 실정이다. 특히 작업장과 실내생활공간은 실내에서 발생되는 오염물질과 외기에서 유입되는 대기오염물질의 영향으로 실내공기의 질은 급속도로 악화되고 있다. 따라서 실내공기질을 쾌적하게 하기 위해서 환기장치의 설치와 지속적인 유지관리는 대단히 중요하다고 할 수 있다. 환기장치설비에서 공기정화장치는 유해 물질을 처리하기 위한 핵심 장치이며 입자상.가스상 물질에 따라 그 종류와 기능이 서로 다르다. 특히 공기정화장치 설비에 보펀적으로 가장 많이 사용되 는 것이 여과기(filter) 이며 사용목적에 알맞는 에어 필터(air filter)의 선정은 전체환기시스템에 막대한 영향을 미치게 된다. 따라서 본 고에서는 산업환기시스템에 사용되고 있는 대표적인 에어필터의 종류와 각각의 특성 및 환기장치 설계상의 에어필터에 관한 이론과 적용기술 등을 설명하고자 한다.

• Korean Journal of Microbiology
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• v.23 no.1
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• pp.25-33
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• 1985

The cell-free cellulolytic enzyme was separated into 3 different enzyme proteins by gel-filtration and ion-exchange chromatography. These fractions were named enzyme A, enzyme B and enzyme C. The mode of action of each of the separated enzymes on crystalline cellulose was examined using infrared spectroscopy and X-ray crystallography. It was concluded that enzyme B is of the $C_1-type$ and reduces the crystallinity of the subatrate by generation an unstable glucopyranose ring structure, whilst enzymes A and C are of the $C_x-type$ and hydrolyse the reaction product of enzyme B to constituent sugars. A reaction scheme for this cellulase system is proposed and discussed.

• Journal of the Korean Society of Groundwater Environment
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• v.4 no.3
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• pp.116-121
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• 1997

Pilot wetland reactor systems to test acid mine drainage treatment efficiencies for metals were designed and operated at the Dalsung mine and surveyed the operating problems. pH and Eh (redox potential) were measured in situ and anayses of Cd, Pb, As, Zn, Cu, Fe, Al and Mn were carried out in the laboratory. Maximum metal removal efficiencies of the reactor containing the rice stalks, the cow manure and limestones were that Cu, Zn, Fe, Cd, Al, Mn and Pb were lowered by 98%, 100%, 99%, 100%, 97%, 61% and 100%, respectively and at that time the pH and Eh of the effluents from the reactor were 6 and about -300 mV. However, the redox potential was raised and removal of metal elements except aluminium was decreased with operation time. It suggests that the reduced condition is very important for the metal removal. During the operation, problems such as scaling in pipes and volume change of the substrate within the reactor occurred, which were preventing the flow of main drainage in pipes and reactor.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.310-311
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• 2003

현대산업이 고도화되고 생활수준이 향상됨에 따라 공기 오염이 심화되고, 건물이 밀폐화되며, 제품이 정밀화됨에 따라 제어해야 할 오염물질이 늘어나고 있으며 급격한 산업발전과 도시화 및 에너지 소비의 급증으로 인하여 대기오염 문제가 날로 심각해지고 있는 실정이다. 도시인이 실내에서 생활하는 시간이 하루 중 90%이상을 차지하고 있으며 실내공기질은 실외와는 달리 실내의 오염원과 실외 오염물질의 유입에 의해 오염될 경우 쉽게 정화되지 않을 뿐만 아니라 재실자들의 건강까지도 위협하고 있다(환경부, 1999). (중략)