• 한국연소학회:학술대회논문집
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• 2012.04a
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• pp.267-268
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• 2012

Soot formation and oxidation characteristics of air-diluted propane diffusion flames have been experimentally investigated under the elevated pressure conditions. PAH concentrations showed more pressure sensitive behavior comparing to soot volume fractions. The flame/soot temperatures in soot oxidation region were obtained using the MOLLIP technique. Under the complete soot oxidation environment, the flame/soot temperature is increased with pressure. The increased temperature could accelerate the soot oxidation process and then exothermic oxidation reaction, in turn, could further raise the flame/soot temperature, which would result in the enhancement of soot oxidation process.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2006.04a
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• pp.153-156
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• 2006

유류오염토양의 자연복원 시 생물이용도(bioavailability)를 높이기 위해 사용되는 계면활성제의 영향을 살펴보고자 제지 폐수로부터 분리한 미생물과 5가지 계면활성제를 사용하였다. 계면활성제로는 Brij 35, Brij 30, Triton X-100, Tween 40, Tween 80을 사용하였으며 유류오염물질로는 PAHs를 사용하여 계면활성제 별 미생물의 성장률 및 PAHs 분해율을 살펴보았다. 그 결과 각각의 계면활성제에 따라 서로 다른 미생물 성장 및 PAHs 분해능을 보였다. 계면활성제에 따른 미생물 성장은 Tween 계열에서 뚜렷했으며 이들 중 Tween 40에서는 PAHs의 분해능 또한 가장 활발하였다.

• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.04a
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• pp.340-343
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• 2003

Soils contaminated by hazardous hydrophobic organic compounds, such as polycyclic aromatic hydrocarbons (PAHs), have become a major environmental issue due to toxic and carcinogenic properties of those compounds. In this work, we investigated effects of various metabolic inducers on phenanthrene biodegradation. Biodegradation tests were peformed with two different Pseudomonads: Pseudononrdia hydrocarboxydans (Gram positive) and Pseudomonas putida (Gram negative). Intermediates of phenanthrene metabolism (1-hydroxy-2-naphthoate, salicylate, catechol, phthalate and protocatechuate) were selected as inducers. The tests indicated that 1-hydroxy-2-naphthoate was the most effective inducer and enhanced the phenanthrene degradation rate up to 5.7 times, even though all the others also had induction ability to some extent. The effective induction could be achieved even at a low concentration of 1-hydroxy-2-naphthoate. Addition of metabolic inducers would be an attractive trick for the successful bioremediation of PAH-contaminated soil.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.11a
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• pp.51-58
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• 2002

연안에 가까운 광양만 퇴적토를 대상으로 하여 PAHs 오염도와 말단제한절편 다형성 분석방법(T-RFLP method)을 이용하여 미생물 군집구조를 조사하였다. 조사된 10개 정점의 PAHs오염도는 80$\pm$20~5,690$\pm$580 (평균 1,499$\pm$1,716) ng/g dry wt.였으며 폐수종말처리장이 위치하는 하천 입구에 위치한 정점 (Wl)과 광양제철소 우수배출구 입구에 위치한 정점에서 상대적으로 높은 농도를 보였다. T-RFLP방법으로 조사한 미생물 군집은 10개 정점이 4개의 그룹으로 구분되었으며 정점 Wl에서 다른 정점과 다른 독특한 군집구조를 형성하였다. PAHs 농후배양시료에서의 미생물군집구조 변화와 비교해 볼 때 조사대상지역 퇴적토의 미생물 군집구조는 PAHs의 오염에 부분적으로는 영향을 받지만 입도, 유기물 등과 같은 환경요인이 군집구조를 결정하는 주된 요인인 것으로 생각된다.

• Proceedings of the Korea Society of Environmental Biology Conference
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• 2002.11a
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• pp.154-162
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• 2002

인간이나 환경에 해로운 영향을 주는 지속성 유기오염물질의 독성을 동물플랑크톤 중 요각류를 대상으로 실험하였다. 실험에 사용된 요각류는 장목만에서 주로 가을에 많은 출현을 보인 Acartia erythraea와 늦가을부터 그 다음해 봄까지 우점하는 A. omorli였다. 지속성 유기오염물에 대한 요각류의 독성을 평가하기 위해 3가지의 실험을 실시하였다. 광양만에서 주로 나타나는 5가지 PAHs에 대한 A. omorli 48h-LC50을 구하였고, 온도에 따른 Benzo(a)pyrene과 TBT의 독성의 변화를 Brine shrimp(Artemia)를 이용해 실험하였으며, PAHs 중에서 독성이 강한 Benso(a)Pyrene에 노출된 먹이를 섭취한 Acartia erythraea와 A. omorli의 egg Production, hatching rate, fecal Pellet의 변화를 측정하였다. A. omorli의 48h-LC50으로 조사된 결과 Fluoranthene과 Benzo(a)pyrene의 독성이 강하게 나타난다. 온도실험에서는 동일한 유해물질을 가지고 실험을 하더라도 온도의 변화에 따라 급격한 독성의 차이가 나타날 수 있고, 유해물질간에도 온도에 따라서 나타나는 독성에 대한 특성이 다르게 나타났다. Benzo(a)Pyrene에 노출된 먹이는 요각류의 egg Production, hatching rate, fecal Pellet에 영향을 미치고 있으며, 특히 농도와 실험시간에 따른 부정적 영향들을 보였다.

• Journal of Food Hygiene and Safety
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• v.8 no.4
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• pp.189-193
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• 1993

Cisplatin is useful for various cancers including advanced testicular and ovarian cancers. However, clinical use of cisplatin has been limited due to its dose-related neplrotoxicity. Transport studies across the membrane vesicles were performed to study the cisplatin nephrotoxicity. In these experiments, after cisplatin was administered to adult male New Zealand White rabbits, basolateral membrane (BLM) vesicles were prepared from the renal cortex. Para-aminohippurate (PAH) uptakes through BLM vesicles were measured to examine the interactioln of cisplatin on the transports of the substrates. As results of the uptake experiments using the vesicle systems, cisplatin had little effects on PAH transport through BLM vesicle. In conclusion, cisplatin did not cause the damage of basolateral membranes.

• YAKHAK HOEJI
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• v.54 no.2
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• pp.126-133
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• 2010

This study was conducted to analyze cost-utility of bosentan versus iloprost indicated for pulmonary arterial hypertension (PAH) in a Korean healthcare setting from a payer's perspective. We constructed a Markov model to estimate total costs and outcomes for 1-year time horizon in a hypothetical cohort of 50-year-old patients with PAH. Base analysis showed that bosentan resulted in KW 5.5 billions saving and 18 quality-adjusted life year (QALY) gains per 100 patients compared to iloprost. Bosentan as a dominant strategy was found to be robust through various sensitivity analyses.

• 한국연소학회:학술대회논문집
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• 2015.12a
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• pp.257-260
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• 2015

Light extinction characteristics of soot particles in ethylene and propane inverse diffusion flames have been experimentally investigated. The measured data suggested that the refractive index of soot particles varies with light wavelength due to PAH contents existing during the soot growth process. The results showed that the scattering effect is less important as the size of secondary particles rarely affects the optical properties of the soot even when the size is large enough to deviate from Rayleigh assumptions.

• Journal of Electrochemical Science and Technology
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• v.9 no.4
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• pp.292-300
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• 2018

The electrocatalytic oxidative behavior of an antiarrhythmic drug, procainamide hydrochloride (PAH) at the gold electrode surface has been examined using different voltammetric methods like cyclic, linear-sweep and differential pulse voltammetry. Voltammograms obtained in this study reveal that the electrode exhibit excellent electrocatalytic activity towards oxidation of the drug. The parameters that can affect the peak current at different pH, scan rate and concentration were evaluated. The number of electrons transferred was calculated. The current displayed a wide linear response ranging from 0.5 to $30.0{\mu}M$ with a limit of detection of 56.4 nM. The impact of potential interfering agents was also studied. The electrode displayed wide advantages such as simple sample preparation, appreciable repeatability, reproducibility and also high sensitivity. Furthermore, the feasibility of the proposed method was successfully demonstrated by determining PAH in the spiked human biological sample.

• Proceedings of the PSK Conference
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• 2002.10a
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• pp.284.1-284.1
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• 2002

In previous studies, we demonstrated that ambient PM collected from urban site of Korea air could induce DNA damage, Various mutagens and carcinogens present in the urban air differ according to the source of the pollutants. Polycyclic aromatic hydrocarbons (PAHs) and their nitrated compound are produced in the combustion of fossil fuels as diesel emission exhausts. In recent, PAH and nitro-PAH have been identified in urban air particulate matter (PM). and some of them were found to be tumorigenic in experimental animals and humans. (omitted)