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이석우,장병만,이광일,이기창,Suck-Woo Lee,Byung-Man Jang,Gwang Il Lee,Gi Chang Lee 대한화학회 1992 대한화학회지 Vol.36 No.6
N-Benzylidenebenzenesulfonamide 유도체의 가수분해 반응속도를 $25^{\circ}C$의 수용액에서 자외선 분광기를 사용하여 측정하고 넓은 pH 범위에 적용될 수 있는 반응속도식을 유도하였다. 가수분해 반응속도에 미치는 치환기 효과를 검토하기 위하여 Hammett plot를 한 결과 전자 끄는기에 의하여 반응속도가 촉진됨을 알 수 있었다. 가수분해 최종 생성물은 benzenesulfonamide와 benzaldehyde 이었으며 가부분해 반응속도 상수 측정과 반응속도식의 유도, 치환기 효과, general base 효과 및 최종생성물의 결과로부터 n-benzylidenebenzenesulfonamide 유도체의 가수분해 반응은 pH 0.2${\sim}$2.5에서는 hydronium ion에 의해서, pH 3.0${\sim}$8.0 사이에서는 중성의 물분자에 의하여 가수분해가 일어나고 pH 8.5 이상에서는 hydroxide ion에 의하여 진행됨을 알 수 있었다. The kinetics of the hydrolysis of N-benzylidenebenzenesulfonamide derivatives have been investigated by ultraviolet spectrophotometry in $H_2O$ at $25^{\circ}C$. A rate equation which can be applied over a wide pH range was obtained. The substituent effect on the hydrolysis of N-benzylidenebenzenesulfonamide derivatives were studied and rate of hydrolysis is known to be accelerated by electron withdrowing group. Final product of the hydrolysis was benzenesulfonamide and benzaldehyde. Base on the rate equation, substituent effect, general base effect and final products, hydrolysis of N-benzylidenebenzenesulfonamide derivatives seemed to be initiated by the hydronium ion at the pH 0.2${\sim}$2.5 and proceeded by the neutral $H_2O$ molecule at pH 3.0${\sim}$8.0 but proceeded by the hydroxide ion at above pH 8.5.
소유역(小流域)의 유출량(流出量)에 관(關)한 연구(硏究) ~사대강(四大江)을 중심(中心)으로~
이석우 ( Suck Woo Lee ),김시원 ( Sin One Kim ),엄태영 ( Tae Young Um ) 한국농공학회 1980 韓國農工學會誌 : 전원과 자원 Vol.22 No.2
To study run-off characteristics in the small watersheds in Korea, investigations had been carried out for a period of 4 years from 1972 to 1975 in the sample watersheds. The samples were selected in four major river basins such as the Han River, the Keum River, the Nakdong River and the Yongsan River. Water levels and rainfall data had been collected from each sample area where the measuring instruments were installed. The findings of this investigation can be summarized as follows; 1. With an average runoff rate of 60% in the sample watersheds, the average runoff rate in each sample proved to be as below; the Han River Basin : 41.4% the Keum River Basin : 61.7% the Nakdong River Basin : 69.4% the Yong San River Basin : 69.2% 2. The base flow rate in the sample watersheds proved to be 8.1 mm/month. 3. A comparison of the runoff obtained from actual measurements made and that calculated by the Kaijyama formula showed that the latter is 9.1% lower than the former.
活絡效靈丹이 endotoxin으로 誘發된 白鼠의 血栓症에 미치는 影響
鄭遇悅,田炳薰,李錫雨 대한동의병리학회 1992 동의생리병리학회지 Vol.7 No.-
This study was performed to investigate the effect of Hwallakhyoleungdan(活絡效靈丹) on the intravascular coagulation induced by endotoxin in rats. The intravascular coagulation was induced by injecting endotoxin in the caudal vein of rats. And these rats were treated with extract of Hwallakhyoleungdan(活絡效靈丹) -1.5 ml/200 g (Group Ⅰ) and Hwallakhyoleungdan(活絡效靈丹) -3.0 ml/200 g (Group Ⅱ), which were orally administered. Then, the numbers of platelets, concentration of fibrinogen and FDP(fibrin-fibrinogen degradation products) were measured. The following results were obtained: 1. The number of platelets increased significantly in the Group Ⅱ compared with the control group. 2. Prothrombin time was shortened significantly in the Group Ⅰ compared with the control group. 3. The concentration of fibrinogen increased significantly in the trial group compared with the control group. 4. The degree of concentration of FDP decreased significantly in the Group Ⅱ compared with the control group. According to the above results, it is considered that Hwallakhyoleungdan(活絡效靈丹) has the significant effects on the thrombosis. Therefore, Hwallakhyoleungdan(活絡效靈丹) seem to be applicable to the diseases related to thrombosis.
이동희,이석우 水原大學校 2004 論文集 Vol.22 No.-
Present-day lightning surge damages of low voltage equipments in building are increasing due to increase in electrical and communication networks in the information-oriented society. And electronic equipments contained electrical circuits with semiconductor are very weak against lightning surge. To achieve effective method of surge protection, there are needs for make an experiments on the lightning surge protective effect of the inside of a house, using simulated house. Therefore this paper describes as a result of experiments for the lightning surge protective effect of the inside of a house, using simulated house.