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대전력용 GTO Inverter 의 구성과 V/F 일정제어
이기태,최상원,김진표,윤용기,이종하 ( Gie Tae Lee,Sang Won Choi,Jin Pyo Kim,Yong Kee Yoon,Jong Ha Ree ) 충북대학교 산업과학기술연구소 1995 산업과학기술연구 논문집 Vol.9 No.2
Abstract_Roman The variable s control of AC motors are used to study, for the limit of DC motor in high power, high voltage and high speed drive. High power Induction motor is able to Variable speed control by high power thyristor in 70s. Accoding to de
금동윤 ( Dong Yoon Keum ),박남희 ( Nam Hee Park ),이기태 ( Kee Tae Lee ) 대한결핵 및 호흡기학회 2005 Tuberculosis and Respiratory Diseases Vol.58 No.1
We report here on an uncommon case of mediastinitis that occurred after entral venous catheterization. A patient with colon and jejunal cancer complained high fever, right shoulder pain, chest pain, and limited motion of the affected shoulder just 6 days
구리와 Methylglyoxal에 의한 조류의 성장 및 인 흡수
이기태,이기성 한국환경독성학회 1999 환경독성보건학회지 Vol.14 No.4
Effects of various concentrations of copper in solid fibrous form and methylglyoxal (MG) on phosphorus uptake and growth change of green algae Scenedesmus obliquus were studied. There was significant differences among cultures treated with various concentrations of copper and MG in growth of algae with parameters of cell numbers, photosynthetic rate and cellular morphology, and phosphorus uptake by cell. When the copper in media is treated with 25mg or 50mg per 100 ml of Bristol solution, the mean cell number of algae was 15.642 x 10^(6) cells· ml^(-1) and 12.986 x 10^(6) cells·ml^(-1), respectively, while those of algae in culture without copper was 18.486 x 10^(6) cells - ml^(-l). The mean cell area of 2450 μm², 1894μm² and 1697μm² in basic media, basic media with 25 mg of copper and basic media with 50 mg of copper was showed the inhibitory effect of copper on algal growth. The algal growth was stimulated by MG when the culture was treated with 25mg of copper or without copper, while it was inhibited when the culture was treated with 50mg of copper. It was considered that there was significant interaction between copper and MG on algal growth. The phosphorus concentration in algal medium treated with 25 mg or 50 mg of copper was 29.435 ppm and 26.224 ppm, respectively, while those of algae in culture without copper was 52,8 ppm, which shows that the application of copper in algal medium can prevent the availability of phosphorus to algal cell.