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바이오디젤 사용에 따른 경유승용차의 미세입자 배출특성 연구
권상일(Sang-Il Kwon),김종춘(Jong-Choon Kim),박용희(Yong-Hee Park),임철수(Cheol-Soo Lim) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Recently, lots of researchers have been attracted to develope various alternative fuels and to use renewable fuels as a solution of environmental problems from automobile. and nano-Particles is main subject in health effect. The relationships between transient vehicle operation and nano-particle emissions are not well-known, especially for using biodiesel fuel. In this study, we have been performed experimental test for the exhaust emission and nano particle reduction characteristics by mixed ratio of biodiesel and analyzed the regulated biodiesel components. The particulate matter (PM) emissions were investigated by number and mass measurement. The mass of the total PM was evaluated using the standard gravimetric measurement method, the total number concentrations were measured on a ECE 15+EUDC driving cycle using Condensation Particle Counter (CPC). Total PM was reduced 2 -38% and number concentration was reduced ]-27% by mixed ratio of biodiesel. Total PM was reduced more than particle because volatile particle was measured in Total PM but was not measured in particle.
Isosterism을 이용한 새로운 1,3-thiazoljne 유도체의 디자인 및 신규 2,4-diimino-l,3-thiazolidine 유도체의 살균 활성
한호규(Hoh-Gyu Hahn),남기달(Kee Dal Nam),임철수(Chul-Soo Lim),마혜덕(Heduck Mah),김진철(Jin-Cheol Kim),조광연(Kwang Yun Cho) 한국농약과학회 2003 농약과학회지 Vol.7 No.1
For the purpose of a development of new agrochemical fungicides, new compound 4 in which 1,3-thiazoline scaffold as well as urea moiety in the structure was designed through molecular modification of lead compound, 2-imino-l,3-thiazoline based on isosterism. The reaction of N-alkylthiourea 5 and bromoacetonitrile in ethanol gave 2,4-diimino-l,3-thiazolidine hydrobromide 6 regioselectively, which was treated with isocyanates gave the corresponding 8 which is tautomer of 4. Antifungal screening (in vivo) of the synthesized compound 8 against typical plant diseases, which include rice blast, rice sheath blight, cucumber gray mold, tomato late blight, wheat leaf rust, and barley powdery mildew, was carried out. Antifungal activities against rice blast of the compound 8 were weaker than those of 2-phenylimino-l,3-thiazoline 1. Some compounds showed weak antifungal activities against wheat leaf rust.
직접분사식 바이오에탄올-가솔린 혼합연료의 분무 및 희박연소 특성에 관한 실험적 연구
박기영 ( Gi Young Park ),강석호 ( Seok Ho Kang ),김인구 ( In Gu Kim ),임철수 ( Cheol Soo Lim ),김재만 ( Jae Man Kim ),조용석 ( Yong Seok Cho ),이성욱 ( Seong Wock Lee ) 한국분무공학회 2014 한국액체미립화학회지 Vol.19 No.3
As a demand for an automobile increases, air pollution and a problem of the energy resources come to the fore in the world. Consequently, governments of every country established ordinances for green-house gas reduction and improvement of air pollution problem. Especially, as international oil price increases, engine using clean energy are being developed competitively with alternative transportation energy sources development policy as the center. Bio ethanol, one of the renewable energy produced from biomass, gained spotlight for transportation energy sources. Studies are in progress to improve fuel supply methods and combustion methods which are key features, one of the engine technologies. DI(Direct Injection), which can reduce fuel consumption rate by injecting fuel directly into the cylinder, is being studied for Green-house gas reduction and fuel economy enhancement at SI(Spark Ignition). GDI(Galoine Direct Injection) has an advantage to meet the regulations for fuel efficiency and CO2 emissions. However it produces increased number of ultrafine particles, that yet received attention in the existing port-injection system, and NOX. As fuel is injected into the cylinder with high-pressure, a proper injection strategy is required by characteristics of a fuel. Especially, when alcohol type fuel is considered. In this study, we tried to get a base data bio-ethanol mixture in GDI, and combustion for optimization. We set fuel mixture rate and fuel injection pressure as parameters and took a picture with a high speed camera after gasoline-ethanol mixture fuel was injected into a constant volume combustion chamber. We figured out spraying characteristic according to parameters. Also, we determine combustion characteristics by measuring emissions and analyzing combustion.
국내 디젤 차량 배기 입자가 쥐 대식세포에 미치는 세포독성 평가
이장한(Jang Han Lee),이용권(Yong Kwon Lee),이지영(Ji-Young Lee),이승복(Seung-Bok Lee),김선화(Sun-Hwa Kim),배귀남(Gwi-Nam Bae),이학성(Hak-Sung Lee),임철수(Cheol-Soo Lim),정남현(Namhyun Chung) 환경독성보건학회 2010 환경독성보건학회지 Vol.25 No.2
DEPs (diesel exhaust particles) like any other particles can be also inhaled into lung to participate in a damaging reaction to the organ. Possible damages might be apoptosis and inflammatory responses to the cells in respiratory track. The aim of this study was cytotoxicity evaluation of DEPs from five in-use diesel vehicles using a murine macrophage cell (RAW 254.7). We found that most DEPs have a considerable cytotoxicity compared to the control and SRM 2975. When measured by MIT assay and extents of apoptosis, DEPs of two high-mileage vehicles had higher toxicity than those of the other three low-mileage vehicles tested. Although mRNA expression level of TNF-α. somewhat explains the trend of cytotoxicity and apoptosis, that of IL-1β did not. Correlation studies among the extents of MIT assay, apoptosis, and TNF-α. expression showed that the extents between apoptosis and TNF-α expression was most highly correlated (r=0.96). These results suggest that cytotoxicity of various DEPs could be compared easily by measuring the extent of apoptosis or TNF-α expression by DEPs.