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結核菌에 對한 Ethionamide 및 Cycloserine의 試驗管內 最低阻止濃度
宋浩星,洪永杓,鄭寅聖,趙載承 최신의학사 1967 最新醫學 Vol.10 No.3
The minimal .inhibitory concentrations of ethionamide and cycloserine to. H37Rv strain and wild strains in Youman's media are increasing stepwise as the incubation time pass. One of the causes of this phenomenon might be owing- to the progressive decrease of effective -drug con centrations contained in. the media. The minimal inhibitory concentrations of ethionamide and cycloserine in H37Rv strain are 0.8 mcg/ml and 6 mcg/ml respectively. In wild strains, the minimal inhibitory concentrations of ethionamide are ranged from 0.4mcg/ml to 2.0mcg/ml in 85 strains, and that of cyclose rine are from below 5mcg/ml to 10mcg/ml in 1Q strains by Youman's media at 10th incubation day. On 4th incubation day microscopy is done the evidence of growing of cells are judged by cord formed and incre ased-tubercle bacilli when inocula are made with vidually seperated cells. As comparing with the turbidityl on 10th day, above mentioned microscopic findings an identical the early detection of resistance to these two drugs seems feasible and practicable.
송호성,김유용 한국농업기계학회 2020 바이오시스템공학 Vol.45 No.3
Purpose This study was carried out to determine the properties of materials used in the rubber mounted under the agricultural tractor rollover protective structure cabin. Methods The natural rubber specimens were subjected to a hyperelastic uniaxial, biaxial, and planar tensile test, and a volumetric compression test for each of the four shore hardness types. The validity of the properties was assessed using ABAQUS, a commercial finite element analysis program. Result As a result of measuring the stress-strain curve with five repetitions of loading-unloading within each strain range, it was observed in all test results that the stress gradually eased from the initial level as the number of load iterations and strain intervals increased. Conclusion The nominal tensile stress was shown in the order of uniaxial, planar, and biaxial tensile test. The nonlinear material models were similar to the tensile test results, and the Ogden 3rd model showed the best performance.