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허도성,신수범,김민석,김혜숙 인제대학교 1999 仁濟論叢 Vol.15 No.1
시간상에서 나타나는 화학반응에서의 비선형적 현상을 살펴본다. 주기적으로 진동하는 시스템과 복잡하게 진동하는 시스템에 대해 이론적 배경과 실험 결과, 그리고 활용 가능성에 대해 역사적 배경과 함께 고찰한다. We have studied the nonlinear phenomena in chemical reaction system. A historical and thermodynamic background about the nonlinear phenomena was considered at first, and we studied the chemical oscillations, complex chemical oscillation patterns, and chaos phenomena including the nonlinear phenomena of living system. Key Word : nonlinear dynamics, chemical oscillations, complex oscillations, chaos phenomena
허도성,신수범 인제대학교 1999 仁濟論叢 Vol.14 No.3
금속 가공과정에서 사용되는 윤활유는 물에 잘 녹지 않는 지용성 물질이 많이 사용되고 있다. 한편 수용성 합성 윤활유는 물에 잘 녹을 뿐 아니라 사용 후 처리가 쉬우므로 지용성 윤활유 대신 수용성 윤활유가 많이 사용되고 있어 이에 대한 새로운 물질의 합성과 특성 연구가 많이 이뤄지고 있다. 이에 본 연구에서는 여러 종류의 수용성 합성 윤활유 중에서 에스테르 물질 합성 윤활유의 합성과 그 특성에 대해 연구한다. 중심단어 : 수용성 윤활유, 에스테르 물질, 합성, 특성 In order to study the properties of aqueous lubricants, an ester compound was synthesized at various reaction conditions. The oleic acid and the copolymer of ethylene oxide and propylene oxide was used as reactants. The products were detected by IR-spectrometer.
김동익,김덕경,허세호,이병붕,김용신,김은숙,문지영,도영수,신성욱,김동수,김만태,진재욱,김용신 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.1
As medical technology progresses rapidly, there is a rise in the average age along with the Korean dietary lifestyle becoming more westernized, which leads to an increase in the number of vascular disease patients in Korea. Thus, we need to manage the medical information of a disease systematically in order to diagnose and treat constructively. However, since there has been no standardized method of man agement to date, a great deal of information could not be properly utilized nor studied. Therefore, the departments of Cardiology, Radiology and Neurology of Samsung Seoul Hospital recently got together to develop an information management system called the Vascular Data System. This program was developed to be run on win98 O/S, upper Pentium Ⅲ, and upper 128 MB Memory, and its source code is Dephi 4.0. It was configured for the user to set the configurations as well as do a variety of search and analysis. If this program were to be updated continuously, it may be used extensively as well as in various parts of clinical research activities.
Non-Bonded Interaction Effects on Cis-Trans Isomerization of 1-Bromopropene
Huh, Do-Sung,Jung Kyung-Hoon Korean Chemical Society 1992 Bulletin of the Korean Chemical Society Vol.13 No.1
The hindered internal rotation effect of methyl group on chemical reaction was studied for cis-trans isomerization reaction of 1-bromopropene system using RRKM technique. A comparative study of the isomerization rates was also performed between the rigid and allowed internal rotations. The calculated rate of rigid cis-trans isomerization of 1-bromopropene was shown to be three times higher than its other halogenated propene homologues with its internal rotations and found to be in good agreement with experimental observations. These findings could be explained reasonably well in terms of the differences of the rotational barrier heights among halogenated propenes and correlated with the relatively low internal rotation barrier of cis-1-bromopropene, 230 cal/mol, compared to those of other cis-1-halopropenes, 700-800 cal/mol, and trans-1-halopropenes, 2.0-2.4 kcal/mol.