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여경구,조한석 대한신장학회 1992 Kidney Research and Clinical Practice Vol.11 No.2
Subclavian catheterization has recentely gained popularity as a convinient method for rapidily establishing venous access for hemodialysis, monitoring central venous pressure and fluid therapy. Transient or permanent implanted plastic devices are frequently the starting point of nosocomial infections. In particular, intravenous catheters often become infected; the clinical symptoms range from mild local inflammation to lethal septicemia, especially in the immunocompromised hosts. The exact pathogenic mechanisms involved are not yet known and chemotherapeutic treatment of these infections is very difficulty and usually requires removal of the catheters. The mucoid grwoth (slim) mediated adhesion of bacteria to solid surface has been investigated, and it seems that this property is of particular importance in the initiation of the infections around prosthetic device. The present study deals with subclavian catheter related infections associated with slime producing organisms.
여경구(KyungKu Yeo),조명래(MyungRae Cho),한동철(DongChul Han) 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.11
In this paper, the friction loss in piston skirt has been calculated considering elastic deformation of piston. Bothof the secondary motion of piston and the mixed lubrication theory have been applied to the analytical dynamic model of piston, and the stiffness matrix of piston skirt, calculated through FEM, has been added as well. The effect of geometrical piston design parameters on the friction loss has been investigated. A small piston pin offset was more effective on the reduction of the friction loss. The friction loss was largely affected by the piston CG position in high speed, but little in low speed. From the parametric study, it is found that the crank offset is the most important piston design parameter to the reduction of the friction loss in piston skirt.
各種 STEROID HORMONE이 CYANOCOBALAMIN의 臟器利用에 미치는 影響
車喆煥,呂卿九,高應麟 서울대학교 1963 서울대학교 論文集 Vol.13 No.-
1. Tissue uptake of intraperitoneally injected Co^58-labeled Cyanocobalamin has been studied on groups of mice administered with Estradiol, Testosterone, or Cortisone, This experiment was conducted in attempt to reveal the tissue utilization of Vitamine B_12 correlated to metabolism of carbohydrate, lipid and proteine. 2. In Estradiol treated group, significant increase of Co^58-labeled Cyanocobalamin uptake was observed in liver and spleen. Males evidently responded earlier than females in all cases. 3. In testosterone treated group, marked increase of Co^58-labeled Cyanocobalamin uptake was observed in most of the organs. The result may indicate that testoseterone obviously increases the utilization of Vitamine B_12 in the experimented tissues. 4. In cortisone treated group, significant decrease of Co^58-labeled Cyanocobalamin uptake was observed in most of the organs. Particulary the uptake rate in livers of mice that had been treated by cortisone for longer period tended to rise, although the value was lower than that of control group.