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이현용(H. Y. Lee),최대봉(D. B. Choi),우동철(D. C. Woo),임선종(S. J. Lim) 한국생산제조학회 2009 한국공작기계학회 추계학술대회논문집 Vol.2009 No.-
The medium and small companies which produce the parts of cars in our country need to start to automate a part of core processes requiring higher precision in advance, because full automation for entire manufacturing process of differential gear case is very expensive. This paper presents the developing for the transfer type of exclusive machine which is used for the drilling process of shaft hole, the process for inner spherical surfaces in the rest of shaft holes and the process of inner side. These processes are preferentially needed to be automated because of the simplicity and the possibility of danger.
영가철(Zerovalent Iron)을 이용한 폐수 중 Tetracycline 및 Sulfonamide 계열 항생물질의 분해
이현용 ( H. Y. Lee ),김권래 ( K. R. Kim ),임정은 ( J. E. Lim ),김성철 ( S. C. Kim ),권오경 ( O. K. Kwon ),이상수 ( S. S. Lee ),양재의 ( J. E Yang ),옥용식 ( Y. S. Ok ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.2
The effluence of veterinary antibiotics to the environment is of concern as it has potential risks such as development of antibiotics resistance bacteria requiring an efficient technology to eliminate the antibiotics in the environment. Therefore, the current study was carried out to examine the ability of zerovalent iron (ZVI) on degradation of the antibiotics (three tetracyclines; tetracycline, chlortetracycline, oxytetracycline and three sulfonamides; sulfamethazine, sulfamethoxazole, sulfathiazole) in water. For this, 5 mg L-1 of each antibiotic solution was treated with ZVI at two different concentrations (2% and 5%) and then the residual concentrations of the antibiotics in solution were measured as time goes. It was appeared that most tetracyclines (>99%) were degraded within 0.5 min at both ZVI treatment levels and also most sulfonamides (>99%) were degraded with ZVI treatment even though the degradation time for sulfonamides was longer than that for tetracyclines. The half life of sulfonamides degradation was in a range of 2.68-3.43 min.
이현용(H. Y. Lee),최대봉(D. B. Choi),우동철(D. C. Woo),임선종(S. J. Lim) 한국생산제조학회 2009 한국생산제조시스템학회 학술발표대회 논문집 Vol.2009 No.10
The medium and small companies which produce the parts of cars in our country need to start to automate a part of core processes requiring higher precision in advance, because full automation for entire manufacturing process of differential gear case is very expensive. This paper presents the developing for the transfer type of exclusive machine which is used for the drilling process of shaft hole, the process for inner spherical surfaces in the rest of shaft holes and the process of inner side. These processes are preferentially needed to be automated because of the simplicity and the possibility of danger.