• Ecology and Resilient Infrastructure
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• v.3 no.2
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• pp.100-109
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• 2016

Low impact development (LID) facilities are established for the purpose of restoring the natural hydrologic cycle as well as the removal of pollutants from stormwater runoff. Improved efficiency of LID facilities can be obtained through the optimized interaction of their major components (i.e., plant, soil, filter media, microorganisms, etc.). Therefore, this study was performed to evaluate the performances of LID facilities in terms of runoff and pollutant reduction and also to provide an optimal maintenance method. The monitoring was conducted on four LID technologies (e.g., bioretention, small wetlands, rain garden and tree box filter). The optimal SA/CA (facility surface area / catchment area) ratio for runoff reduction greater than 40% is determined to be 1 - 5%. Since runoff reduction affects the pollutant removal efficiency in LID facilities, SA/CA ratio is derived as an important factor in designing LID facilities. The LID facilities that are found to be effective in reducing stormwater runoff are in the following order: rain garden > tree box filter > bioretention> small wetland. Meanwhile, in terms of removal of particulate matter (TSS), the effectiveness of the facilities are in the following order: rain garden > tree box filter > small wetland > bioretention; rain gardens > tree box filter > bioretention > small wetland were determined for the removal of organic matter (COD, TOC), nutrients (TN, TP) and heavy metals (Cu, Pb, Cd, Zn). These results can be used as an important material for the design of LID facilities in runoff volume and pollutant reduction.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2014.11a
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• pp.13-13
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• 2014

그래핀은 높은 열전도도, 이동도, 물리적 강도, 화학적 안정성을 갖는 물질로써 가장 활발하게 연구가 진행되고 있는 소재이다. 하지만, 높은 품질의 그래핀을 생산하기 위한 Chemical Vapor Deposition(CVD) 그래핀 제조 방법은 높은 공정단가와 낮은 수율 문제로 적용에 어려움을 겪고 있다. 본 연구에서는 초고순도 그래핀 플레이크를 RF thermal plasma를 이용하여 제조함으로써 이러한 문제점을 해결하고자 한다.

• Journal of Korean Home Economics Education Association
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• v.27 no.1
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• pp.67-83
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• 2015

The purpose of this study was to explore the levels of ethical consumptions and related variables on ethics of adolescents as consumers. This subjects were 552 middle and high school students. The research results are summarized as follows. 1. The scores to measure ethical consumptions level of the adolescents was ranged from 2.87 to 3.08, which were relatively low. 2. The ethical consumptions(fair-trade product consumption, donation and giving, local consumption and eco-friendly consumption) in demographic variables were found to have significant differences depending on their religion, perceived social class, father's education and mother's education. 3. The result of hierarchical regression analysis indicated that consumer education experience, the eco-friendly values, materialism, saving, experiencing mass media on affecting the fair-trade product consumption. The major variables affecting the ethical consumptions in the donation and giving were materialism, consumer education experience, experiencing mass media and the eco-friendly values. The significant variables affecting the local consumption were the eco-friendly values, consumer education experience, materialism, experiencing mass media and saving. The major variables affecting the eco-friendly consumption were the eco-friendly values materialism.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 1998.05a
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• pp.147-150
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• 1998

현대의 고도화된 산업발달과 함께 생산품의 고품질, 다품종, 대량생산을 위한 설비의 대형화, 공정의 복잡화, 위험성이 높은 물질의 대량 사용 등으로 인하여 잠재위험이 더 한층 증가하게 되었다. 따라서 산업현장에서 여러 가지 잠재위험으로 인하여 화재, 폭발, 독성물질 누출 등 대규모 중대산업사고의 발생 가능성이 커졌으며 사고 발생시 현장의 근로자, 인근지역 주민, 주변의 환경에까지 막대한 영향을 미치게 된다. (중략)

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2003.05a
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• pp.39-42
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• 2003

현대의 화학공장에서는 소비자의 요구를 충족시키기 위한 생산품 생산 및 제품의 고급화, 규격화 등으로 인하여 공정 및 설비가 더욱 복잡해지고, 공정운전조건이 세분화됨으로써 고온, 고압에서 사용·취급·저장되는 유해화학물질의 특성으로 인하여 대규모의 잠재 위험성이 증가하는 현실이다.(중략)

• Journal of Korean Society of Environmental Engineers
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• v.31 no.9
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• pp.783-792
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• 2009

This study investigated 31 selected EDCs(Endocrine Disrupting Compounds) and PPCPs(Pharmaceutical and Personal Care Products) in the influent and effluent of a wastewater treatment plant(WWTP) nearby Seoul metropolitan area. The chemical compounds of EDC/PPCPs detected from the plant influent sample include stimulant, X-ray contrast media and fire retardant. The total amount of each compound class were 59.67%, 20.20% and 9.00% respectively. However, in the effluent sample, the major micropolutants detected were oral beta-blocker(30.54%), fire retardant(20.49%), X-ray contrast media(18.17%). The EDC/PPCPs occurrence levels of this study were somewhat lower than previous domestic studies'. When compared to those of overseas, the values were even lower. Some pharmaceutical compound levels particularly measured in European studies were even several thousand times high. This study then compared PECs(Predicted Environmental Concentration) and MECs(Measured Environmental Concentration) of 9 selected pharmaceuticals compounds. The calculated PECs were substantially different with the MECs, while the occurrence order between the PECs and MECs in terms of concentrations of the compounds were similar.

• Journal of Food Hygiene and Safety
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• v.15 no.3
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• pp.235-240
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• 2000

Various separation techniques of antimicrobial compounds from food materials have proven to be ineffective, involving liquid-liquid extraction and chromatography. We established efficient separation procedure for partially purifying antimicrobial compounds from Korean leek. Separation procedures consisted of ultrafiltration, liquid-liquid extraction, TLC and HPLC. Molecular weight of antimicrobial compounds were less than 5,000 dalton. Major compounds were propenyl methyl disulfide, S-methyl methylthiosulphonate and dimethyl disulfide.

• Journal of the Korean Society of Food Science and Nutrition
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• v.30 no.5
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• pp.954-958
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• 2001

Perismmon has been consumed for long times in Korea and used as a drug for a long time in Korea, It was known to help alcohol intoxication. Ingested alcohol is metabilized by alcohol dehydrogenease and acetaldehyde dehydrogenase in liver. Alcohol dehydrogenease activator and acetaldehyde dehydrogenase activator(ALDHA) was detercted in persimmon. The oncentration of ALDHA was determined and compared in different havesting time, species, and available processed foods. The level of ALDHA was highest in persimmon (Fuyu) harvested in November. Lower ALDHA activities were found in its processed foods. Persimmon and its processed foods are expected to be effective in decreasing the concentration of alcohol and acetaldehyde after alcohol intake.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.87-88
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• 2003

포름알데하이드는 오염된 혹은 깨끗한 대기 환경에서 편재하는 오염물질이다. 일반적으로 깨끗한 대기 환경에서 수 ppt의 농도로 존재하지만 오염도가 높은 도시지역에서 여름철 심한 스모그 현상이 일어나면 수십 ppb의 농도를 보이기도 한다. 포름알데하이드는 1차 혹은 2차 대기오염물질이고, 탄화수소의 광화학 반응의 중간 생성물로써 포름알데하이드는 도시지역에서의 광화학 반응의 오염물질의 형성에 기여한다. 따라서 포름알데하이드의 측정은 CO의 지구적 수지(budget)와 다양한 대기 반응 물질 사이의 수지와 회전(cycling)을 이해하고 대류권의 광화학모델을 증명하는데 중요하다. (중략)

• Proceedings of the Korean Printing Society Conference
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• 2001.06a
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• pp.45-45
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• 2001

자료의 보존에 있어서 종이의 열화로 인해 자료의 분석, 열화메커니즘의 해석, 종이의 보존이란 측면 하에서의 관심이 서서히 집중되고 있는 실정이며, 그 중요성도 크게 대두되고 있는 실정이다. 산성지를 중성화하는 화학적시스템, 즉, 탈산성화처리는 알카리계금속(Ca, Mg, Zn, Na)과 유기용매, 수용성용매를 이용하여 이들 약품을 종이내에 침투시켜 중성화(pH 6-8) 함으로써 종이의 주성분인 cellulose를 보다 안정화시키는 방법으로 산을 중화하여 보존성을 향상시킬 수 있는 것이다. 즉, 탈산처리란 화학적으로 종이속에 생기는 산 또는 산을 발생하는 물질을 알칼리물질로 중화하는 것이다. 또한 중화후 알칼리 물질이 종이에 잔류하면 장래에 내부적으로 발생하는 산이나 외부(대기중의 오염물질 등) 로부터 침입하는 산도 중화하여 보존성을 향상시킬 수가 있다. 따라서, 본 연구는 산성초지법에 의해 제조된 용지들의 열화특성과 알카리 토금속을 처리한 후에 알카리도를 상승시킨 용지의 열화특성을 물리·화학적 변화를 통하여 종이의 보존성을 비교 검토·규명함으로써 문(도)서의 보존체계를 마련하고자 하며, 보존과 관련된 기초자료를 얻고자 실시하였다.