Lipopolysaccharide로 활성화시킨 흰쥐 혈관의 iNOS 발현에 대한 Higenamine의 효과

강영진,이균우,구의본,이회영,장기철,Kang Young-Jin,Lee Goun-Woo,Ku Eui-Bon,Lee Hoi-Young,Chang Ki-Churl 대한약리학회 1997 The Korean Journal of Physiology & Pharmacology Vol.1 No.3

Higenamine was widely used as traditional remedy for the treatment of rhumatoid arthritis. Nitric oxide(NO) may be a critical mediator in this inflammatory disease. Synovial tissue from humans with inflammatory arthritis expresses NOS2(iNOS) mRNA and protein, and generates NO in vitro. We therefore, investigated the effect of higenamine on the induction of nitric oxide synthase(NOS) promoted by lipopolysaccharide(LPS). Prophylactic application of higenamine selectively prevented LPS-primed initiation of L-arginine-induced relaxation and restored rhenylephrine(PE)-induced contraction in rat aorta. LPS-stimulated nitrite production in the incubation medium was reduced by higenamine. Furthermore, RT-PCR and Northern analysis indicated that higenamine reduced iNOS expression primed by LPS in rat aorta. These results suggest that higenamine prevents LPS-promoted induction of NOS in vascular smooth muscle.

養成場에 따른 피조개, Anadara broughtonii의 成長

유성규(Sung Kyoo Yoo),장영진(Young Jin Chang),강경호(Kyoung Ho Kang),김영구(Yŏng Ku Kim) 한국양식학회 1990 韓國養殖學會誌 Vol.3 No.1

운행 가솔린자동차 엔진성능에 미치는 튜닝 흡기 및 배기 시스템의 효과에 관한 연구

배명환(Myung-whan Bae),구영진(Young Jin Ku),박희성(Hui-seong Park) 대한기계학회 2017 大韓機械學會論文集B Vol.41 No.11

본 연구의 목적은 운행자동차에 있어서 안전운행과 환경에 문제가 없는 효과적인 엔진튜닝의 작업가능성을 확인하고, 튜닝엔진의 특징을 파악하여 엔진튜닝 검사의 기초자료를 분석하는 것이다. 비튜닝 및 튜닝 엔진 2-1, 2-2, 2-3의 4종류에 대한 넓은 범위의 엔진회전수 하에서 4행정, 4기통 DOHC, 터보인터쿨러, 수냉 가솔린엔진의 실제 운행자동차를 사용하여 공연비 및 성능 특성에 미치는 튜닝엔진의 효과를 실험적으로 조사했다. 운행 가솔린자동차에 대한 엔진의 튜닝 부분은 흡기 다기관, 흡기 파이프, 공기필터, 배기 다기관, 배기 파이프 및 소음기를 포함한다. 1인이 탑승한 5단 자동변속기를 갖는 운행 가솔린자동차 비튜닝 및 튜닝 엔진의 공연비 및 토크는 차대 동력계(Dynojet 224xLC)에 의하여 실험에 의해 측정하였다. 운행 가솔린자동차 튜닝엔진의 최대 토크는 비튜닝엔진보다 평균 103.68% 만큼 증가되었고, 튜닝엔진의 최대 출력은 비튜닝엔진보다도 평균 119.68% 만큼 증가되었음을 알았다. The purpose of this study was to analyse the basic data of the engine tuning inspection by confirming the working possibility of effective engine tuning and identifying the characteristics of tuned engine that are no problem with the safety operation and environment in a driving gasoline car. The effects of tuned engine on the characteristics of air/fuel ratio and performance at a wide range of engine speeds were experimentally investigated by the actual driving car with a four-cycle, four-cylinder DOHC, turbo- intercooler, water-cooled gasoline engine operating under four types of non-tuning, and tuning 2-1, 2-2 and 2-3. The tuned parts of engine in a driving gasoline car include the intake manifold, intake pipe, air filter, exhaust manifold, exhaust pipe and silencer. In this experiment, the air-fuel ratio and torque of both non-tuned and tuned engines that one person took on board in the car with a five-speed automatic transmission were measured by the chassis dynamometer(Dynojet 224xLC). It was found that the maximum torque of tuned engine in a driving gasoline car was increased by 103.68% on average, while the maximum output was increased by 119.68% on average in comparison to the non-tuned engine.

운행자동차의 흡기 다기관, 흡기 파이프 및 공기필터의 튜닝에 의한 성능 및 배기 배출물 효과

배명환(Myung-whan Bae),구영진(Young Jin Ku),박희성(Hui-seong Park) 한국자동차공학회 2016 한국자동차공학회 부문종합 학술대회 Vol.2016 No.5

The purpose of this study is to identify the possibility of effective tuning works and understand the characteristics of tuning engine corresponding to the safe operation and environment of a driving gasoline car. The effects of tuning on the characteristics of performance and exhaust emissions under a wide range of engine speeds are experimentally investigated by the actual driving car with a four-cycle, four-cylinder DOHC, turbo-intercooler, water-cooled gasoline engine operating at four types of non- tuning, tuning 1, 2 and 3. The tuning parts in the gasoline engine are intake manifold, intake pipe and air filter. It is found that the actual air-fuel ratio of non-tuning engine was slightly higher than those of tuning engines. The output was significantly increased by the tuning whereby the maximum output of tuning engine was more increased to approximately 117.64% than that of non-tuning engine. In addition, CO, THC and NOx emissions of non-tuning and tuning engines measured by the constant-speed test mode were all satisfied with the inspection standards, and CO emission was increased, while THC and NOx emissions were reduced by tuning.

동력전달용 기계부품의 물성 확보를 위한 인라인 인산염 피막처리 공정기술개발

김덕호 ( Deok-ho Kim ),구영진 ( Young-jin Ku ) 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.2

The steel wire or steel bar processing process applied to the manufacture of various bolts and power transmission shafts was improved by applying in-line phosphate film treatment technology. By applying a polymer lubricant for a non-reactive metal forming process and a non-reactive non-phosphorus lubricating coating agent, the film formation for each process time was comparatively analyzed and reviewed. Compared to the nine processes applied previously, the in-line phosphate film treatment technology applied with only two processes has been effectively improved in terms of reduction of treatment time, reduction of facility installation area, prevention of water pollution due to wastewater, and non-use of ozone-depleting substances. In addition, it was found that it can have an important effect on productivity improvement and price competitiveness from the simplification of quality control and process control as well as improvement of the working environment.

가솔린엔진 운행자동차 배기소음에 미치는 튜닝 흡기 및 배기 시스템의 효과에 관한 연구

배명환(Myung-whan Bae),구영진(Young Jin Ku),박희성(Hui-seong Park) 대한기계학회 2021 大韓機械學會論文集B Vol.45 No.1

본 연구 목적은 가솔린엔진 운행자동차의 튜닝 특징을 파악하여 안전과 환경에 문제가 없는 엔진튜닝의 효과적인 작업가능성을 확인하고, 튜닝엔진 검사의 기초자료를 확보하기 위하여 저자들의 다른 논문에서 고찰한 성능 및 배기 배출물에 미치는 효과를 기반으로 배기소음 특성을 파악하는 것이다. 소음진동관리법에 따른 운행차 소음측정법에 의해 엔진회전수 및 차량속도에 대한 배기소음 특성에 미치는 튜닝엔진 효과를 조사하기 위하여 4행정, 4기통 DOHC, 터보 인터쿨러, 수냉 가솔린엔진을 5종류의 비튜닝 및 튜닝 2-1, 2-2, 2-3(close), 2-3(open)으로 해 운행자동차에 적용하였다. 가솔린엔진 운행자동차의 튜닝부분은 흡기 다기관, 흡기 파이프, 공기필터, 배기 다기관, 배기 파이프 및 소음기가 포함되었다. 소음진동관리법에 따른 운행차 소음측정법에 의한 비튜닝 및 튜닝 가솔린엔진 운행자동차의 배기소음 측정값이 검사기준에는 모두 만족되었지만, 튜닝에 의해 배기소음이 증가되고 있음을 알았다. The purpose of this study is to identify the characteristics of exhaust noise based on the effects of performance and exhaust emissions discussed in the authors’ other papers to confirm the effective working possibility of engine tuning without problems in safety and the environment, and to obtain the basic data of the tuning engine inspection after investigating the tuning distinctions in a driving car of gasoline engine. The driving car with a four-cycle, four-cylinder DOHC, turbo-intercooler, water-cooled gasoline engine operating under five types of non-tuning, and tuning 2-1, 2-2, 2-3 (close) and 2-3 (open) was applied to investigate the effects of tuning engine on the characteristics of exhaust noises as the functions of engine and vehicle speeds by the noise measurement method of driving cars according to Noise and Vibration Control Act. The intake manifold, intake pipe, air filter, exhaust manifold, exhaust pipe and silencer were included in tuning parts for a driving car of gasoline engine. It was found that the measured values of exhaust noise for a driving car of non-tuning and tuning gasoline engines by the noise measurement method of driving cars according to Noise and Vibration Control Act met all the inspection criteria, but the exhaust noise values by tuning were increased.

플라즈마 EGR 조합시스템 터보 인터쿨러 ECU 커먼레일 디젤기관의 성능 및 NO<SUB>x</SUB>ㆍTHC 배출물 특성에 관한 연구

배명환(Myung-whan Bae),구영진(Young-jin Ku),이봉섭(Bong-sub Lee) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.3

ECU 컴먼레일 디젤기관의 NO_x 및 THC 배출물에 미치는 터보 인터쿨러 플라즈마 EGR 조합시스템의 영향

배명환(Myung-whan Baec),구영진(Young-jin Ku),이동윤(Dong-yoon Lee),김종섭(Chong-sup Kim) 한국자동차공학회 2004 한국자동차공학회 지부 학술대회 논문집 Vol.- No.-

The aim in this study is to develop the combined turbo intercooler EGR system with a non-thermal plasma reactor for reducing exhaust emissions and improving fuel economy simultaneously in ECU common-rail diesel engines. At the first step, the characteristics of performance and NO_x THC emissions under four kinds of engine loads arc experimentally investigated by using a four-cycle, four-cylinder, direct injection type, water-cooled ECU common-rail diesel engine with a combined turbo intercooler plasma exhaust gas recirculation (EGR) system operating at three kinds of engine speeds. The EGR and turbo intercooler system are used to reduce NO_x emissions, and the non-thermal plasma reactor and turbo intercooler system are used to reduce THC emissions. In this study, the plasma system is a flat-to-flat type reactor operated by a plasma power supply. The fuel is injected by pilot and main injections at the variable injection timing between BTDC 15˚ and ATDC 1˚ regardless of experimental conditions. It is found that the specific fuel consumption rate with EGR is increased, but the fuel economy is better than that of mechanical injection type diesel engine compared with output. Results also show that NO_x emissions are decreased, but THC emissions are increased, as the EGR rate is elevated. NO_x and THC emissions are slightly decreased as the applied electrical voltage of the non-thermal plasma reactor is elevated. Thus one can conclude that the influence of EGR in NO_x and THC emissions is larger than that of the non-thermal plasma reactor, but THC emissions are greatly influenced by the nonthermal plasma reactor as the EGR rate is elevated.

터보 인터쿨러 커먼레일 디젤기관의 매연, CO 및 CO₂ 배출물에 미치는 플라즈마 EGR 조합시스템의 영향에 관한 연구

배명환(Myung-whan Bae),구영진(Young-jin Ku),이봉섭(Bong-sub Lee),윤일중(Iljoong Youn) 한국자동차공학회 2006 한국 자동차공학회논문집 Vol.14 No.4

The aim in this study is to develop the combined EGR system with a non-thermal plasma reactor for reducing exhaust emissions and improving fuel economy in turbo intercooler ECU common-rail diesel engines. In this study, the characteristics of soot, CO and CO₂ emissions under four kinds of engine loads are experimentally investigated by using a four-cycle, four-cylinder, direct injection type, water-cooled turbo intercooler ECU common-rail diesel engine with a combined plasma exhaust gas recirculation(EGR) system operating at three kinds of engine speeds. The EGR and non-thermal plasma reactor system are used to reduce NO<SUB>x</SUB> emissions, and the non-thermal plasma reactor and turbo intercooler system are used to reduce soot and THC emissions. The plasma system is a flat-to-flat type reactor operated by a plasma power supply. The fuel is sprayed by pilot and main injections at the variable injection timing between BTDC 15° and ATDC 1° according to experimental conditions. It is found that soot emissions with increasing EGR rate are increased, but are decreased as the applied electrical voltage of the non-thermal plasma reactor is elevated at the same engine speed and load. Results also show that CO and CO₂ emissions are increased as EGR rate is elevated, and CO emissions are increased, but CO₂ emissions are decreased as the applied electrical voltage of the non-thermal plasma reactor is elevated at the same engine speed and load.

터보 인터쿨러 플라즈마 EGR 조합시스템 전자제어 컴먼레일 디젤기관의 성능 및 NOx·THC 배출물 특성

배명환(Myung-whan Bae),구영진(Young-jin Ku),이동윤(Dong-yun Lee),김종섭(Chong-sup Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

The aim in this study is to develop the combined turbo intercooler EGR system with a non-thermal plasma reactor for reducing exhaust emissions and improving fuel economy in ECU common-rail diesel engines. At the first step, the characteristics of performance and NOx·THC emissions under four kinds of engine loads are experimentally investigated by using a four-cycle, four-cylinder, direct injection type, water-cooled ECU common-rail diesel engine with a combined turbo intercooler plasma exhaust gas recirculation (EGR) system operating at three kinds of engine speeds. The EGR and turbo intercooler system are used to reduce NOx emissions, and the non-thermal plasma reactor and turbo intercooler system are used to reduce THC emissions. In this study, the plasma system is a flat-to-flat type reactor operated by a plasma power supply. The fuel is sprayed by pilot and main injections at the variable injectin timing between BTDC 15˚ and ATDC 1˚ according to experimental conditions.<br/> It is found that the specific fuel consumption rate with increasing EGR rate is increased, but the fuel economy is better than that of mechanical injection type diesel engine as compared with the same output. Results show that NOx emissions are decreased, but THC emissions are increased, as the EGR rate is elevated. NOx and THC emissions are also slightly decreased as the applied electrical voltage of the non-thermal plasma reactor is elevated.