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식물을 흡착제로 이용한 각종 금속이온의 포집제거에 관한 연구 (Ⅱ) , Cucurbita moschata 잎을 흡착제로 이용한 수종 금속이온의 포집 제거 및 그 이론에 관한 연구
한상수(S . S . Han),김주신(J . S . Kim),김재백(J . B . Kim),고건일(G . I . Ko) 한국약제학회 1987 Journal of Pharmaceutical Investigation Vol.17 No.4
Adsorption of metal ions(Ag^+, Co^(2+), Zn^(2+)) from water by the formalin treated leaves of Cucurbita moschata was surveyed by atomic absorption spectroscopy. The rate of adsorption by the formalin treated leaves of Cucurbita moschata was evaluated under the condition of variation in temperature, stirring time and metal ion concentration. The result was as follows; Formalin treated sample had greater adsorbability than nontreated sample and active carbon, which were not denaturated at 110℃ and room temperature for the long period. The adsorption of metal ions by the formalin treated leaves of Cucurbita moschata was evaluated to discover useful scavenger. Adsorption of silver, cobalt and zinc by the formalin treated leaves of Cucurbita moschata roughly follows Freundlich isotherms in the concentration range of each 5-200 ㎍ of Ag, Co and Zn per milliliter. Namely, in the case of silver; logX/m=0.55 logC+2.65, in the case of cobalt; log X/m=0.77 logC+2.63, in the case of zinc; logX/m=0.70 logC+2.56
연료 분사시기가 전자제어 디젤엔진의 엔진 성능 및 배기 배출물에 미치는 영향
김경현(K. H. Kim),김주신(J. S. Kim),이한성(H. S. Lee),강희영(H. Y. Kang),고대권(D. K. Koh) 한국동력기계공학회 2009 한국동력기계공학회 학술대회 논문집 Vol.2009 No.11
This paper describes the engine performance and exhaust emissions of a direct injection diesel engine, operating electronically controlled diesel fuel injector with variable injection timing. Fuel injection was controlled to retard or advance initiation of the injection event by electronically controlled fuel injection unit injector. When fuel is injected into cylinders of a DI diesel engine it will go through ignition delay of processes before being exhausted to the outside. Injection timing of DI diesel engine has a significant effect upon performance and emission