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이용봉(Y. B. Lee),윤병로(B. R Yoon),권휴상(H. S. Kwon),박경암(K. A. Park),유선학(S. H. Yoo) 한국유체기계학회 2001 유체기계 연구개발 발표회 논문집 Vol.- No.-
Noise is one of the major environmental problems in human life. To reduce the noise emitted from the control valve it is necessary to develop the measurement method, measurement system, analysis method applicable to the field. In this study IEC and ISO standards were investigated and measurement method for the valve noise was proposed. Noise from the valve was measured in the reverberation room and sound power level was calculated. The sound power level increased as the flow rate and pressure difference increased. The noise characteristics are useful to predict valve noise for given conditions, to compare the performance of different valves and to develope low-noise valves.
Adiramycin이 C6 glioma 세포에 미치는 영향에 대한 원지의 효과
이은미,최유선,손영우,유교상,하대호,이환봉,장철호,이정헌,이강창,이승현,박승택,이건목,류도곤 대한동의생리학회,대한동의병리학회 2001 동의생리병리학회지 Vol.15 No.6
To elucidate the cytotoxic effect of adriamycin on C6 glioma cells, we examined the neurotoxicity induced by adriamycin by MTX assay when C6 glioma cells were cultured in the media containing various concentrations of adriamycin for 72 hours. In addition, neuroprotective effects of herb extract such Polygalae Radix(PR), on adriamycin-induced neurotoxicity in cultured C6 glioma cells were evaluated after C6 glioma cells were preincubated with various concentrations of herb extract, PR for 2 hours before 6uM adriamycin for 72 hours. Adriamycin decreased remarkably cell viability in dose-and time-dependent manner in these cultures, and also herb extract, PR increased cell viability of C6 glioma cells damaged by adriamycin. From these results, it is suggested that adriamycin was highly toxic in cultured C6 glioma cells, and PR was effective in blocking the neurotoxicity induced by adriamycin in these cultures.