TEMPOL(??)에 대한 전자 스핀 공명 연구

유홍용,한찬수 순천향대학교 기초과학연구소 1999 순천향자연과학연구 논문집 Vol.5 No.1

Electron spin resonance studies of the free radical TEMPOL have been carried out at room temperature. The ESR spectra have 3 hyperfine lines due to interactions with the nuclei of nitrogen of the radical. As results of our analysis, the ESR parameters have been found that ??, ??. From the hyperfine interaction with a nucleus of nitrogen, it is suggested that the magnetic electron in the radical is localized around the nucleus.

女子中ㆍ高等學生의 服飾行動과 服裝規範에 대한 硏究 : 學校에서의 服裝規定을 中心으로 Focusing on Clothing Regulations in the School

유덕화,박찬부 한국 가정과 교육 학회 1991 한국가정과교육학회지 Vol.3 No.-

The purpose of this study was to investigate the following contents ; 1. Relationship between clothing behavior (modesty, conformity, importance) and clothing regulations of school girls. 2. The differences between middle school girls and high school girls in clothing behavior and in attitude toward clothing regulations. 3. The differences between stuendts gerself norms and subjective norms (the students thoughts which would be parents opinions and teachers opinins) in attitude toward clothing regulations. Questionnaires were designed and administered to 300 middle school girls and 302 high school girls in Inchon. The obtained data were statistically analyzed by Pearson's correlation coefficients, t-test, F-test, and Duncan test. The results of the study were summarized as follows; 1. As tho the differences in responses between school levels, the high school girls showed higher interest in conformity. But there is on differances in Modesty and Importance by school levels. 2. As tho the differences in responses between school levels, there were on differences in attitued toward clothing regulations. But according by types of clothing regulations, high school girls showed higher desired in shoes and sack. 3. In correlation coefficients between the variables on clothing behaviors and the attitudes toward clothing regulations of school girls, modesty is the most related toward clothing reguations of school girls and conformaity, importance the next. The higher the school girls are in modesty, the more follow the clothing reguations. And the higer the school girls are in conformity and importance, the lower follow the clothing reguations. 4. The differences between students herself norms and subjective norms (the studenst thoughts which would be parents opinions and teachers opinions), students and parents showed lower scores than teachers. That is tho say, theachers put more restrictions on students clothing than parents do.

수분에 불안정한 2-(Trimethylsilyloxy)furan의 수용체에서의 카르보닐 부가반응 연구

柳燦模,李宗昊,李晟洙,尹淑卿 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

The irreversible addition of 2-(trimethylsilyloxy)furan to various aldehydes in the presence of catalytic amount of alkali metal carbonate in aqueous media is described. Even though alkli metal enolates have many synthetic advantages of applicability and high selections of (E)- and (Z)- enolate geometry, their application to carbonyl addition have been utilized in limited purpose mainly due to the low stereoselectivity resulted from the equilibrium between retroaldol and realdol. The addition of 2-(trimethylsilyloxy)furan to the aldehyde in the presence of K_2CO_3 in aqueous media(THF : H_2O = 9 : 1) at -20℃ resulted in the formation of addition product in high yield and moderate good stereo selection (3-15:1).

부분입체선택적 Zwitterionic Claisen 전위반응

柳燦模,崔夏洵,李宗昊,鄭元爀 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

Aza-Claisen rearrangement through the zwitterionic intermediate is described. This reaction was able to carry out at low temperature(-78∼0℃) and also exhibited high diastereoselectivities. The formation of zwitterionic intermediate was realized by addition of t-crotylamine to the ketene formed from deprotonation of corresponding acyl halide. The electronically neutral product was achieved through the [3,3]-sigmatropic rearrangement of self-promoted zwitterionic intermediate in high diastereoselectivity due to lower reaction temperature. Treatment of N-crotylpiperidine with propionyl chloride in the presence of K_2CO_3 at 0℃ for 1 h gave threo selective(97 : 3) amide in 41% isolated yield.

새로운 [3,3]-Sigmatropic Rearrangement를 이용한 입체선택적 아미드의 합성

柳燦模 성균관대학교 기초과학연구소 1993 論文集 Vol.44 No.2

새로운 [3, 3]-sigmatropic rearrangement를 통한 효율적인 입체선택적 amide 합성경로를 개발하였다. 키틴과 3차알릴아민의 부가물의 전위로 97:3의 입체선택적으로 amide가 생성되었다. 이 방법론은 비고리화합물의 입체선택적 합성에 넓은 응용성과 효율성을 나타내었다. A diastereoselective synthetic route to amide through novel [3, 3]-sigmatropic rearrangement has been developed. Rearrangement of adduct between ketene and t-allyamine afforded amide with 97:3 diastereoselection. The method exibited wide applicablity and efficacy for the stereoselective synthesis of acyclic system.

심전도의 디지털 기록화 모듈과 개인용컴퓨터 저장/분석시스템의 개발

조명찬,김기석,배장환,연태진,김동운,이태수,전은석,김유진 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.2

연구목적: 현재 우리나라의 의료분야에서는 정보기술의 발전으로 처방 전달 시스템과 전자차트의 활용이 상용화 되고 있으나 병원내에서 가장 많이 처방되고 검사되는 12-유도 심전도의 디지털화와 이에 연계된 심전도 결과의 개인용 컴퓨터로의 저장, 인터넷을 이용한 병원으로의 전송이나 타 기관에서의 심전도 결과의 동시 관찰 등에 관한 기술 등은 개발되지 못한 상태이다. 이에 본 연구에서는 심전도를 디지털화하며 저장이 가능한 PC 모듈을 개발하고 심전도 결과를 병원 전산 시스템에 포함시켜 병원내외에서 편리하게 조회, 검색할 수 있는 디지털 인터페이스를 개발하려 하였다. 재료 및 방법 : 낮은 전력에서 잡음특성이 우수한 대역여파기와 증폭기를 설계하였으며 각종기능이 내장된 고신뢰성 프로세서를 채택하였으며 전원 잡음이 고려된 필터와 전원 회로 설계로 하드웨어를 개발하였다. MSC 6.0과 Visual Basic 6.0을 바탕으로 하여 active X 모듈화를 유도하고 조회용 PC에서의 복원과 PACS로의 연동을 통해 순환기내과용 PACS 개발이 가능하도록 소프트웨어를 준비하였다. 결과: 심전도 검사자가 쉽게 장착, 검사가 가능한 소형화된 측정 모듈을 개발하였고 극저전류에서 동작이 가능하였으며 우수한 데이터의 압축 및 복원률을 구현하였다. 결론: 이번 심전도 디지털 모듈의 개발로 기존의 감광지에 의존하던 심전도 결과의 보존과 보관공간에 의한 경제적인 손실을 상당 부분 해결할 수 있으며 OCS에 연계된 결과로 인해 원내에서의 다면적 진료가 가능하다. 이번 연구에서 개발된 기술은 향후 디지털화된 심전도 기록장치와 같은 고부가 의료장치의 국산화와 광파일 의무기록 시스템이나 검사물의 무선 전송에 채용되어 의료 전달 체계나 응급체계의 발전에 기여하리라 사료된다. Purpose : The progressed communication technology commercialized the order communication system ( OCS) and the electric medical records( EMR) in the field of medicine in Korea. However, technologies of digitalization such as recording to personal computer, transfer to internet and simultaneous observation of electrocardiogram ( ECG) recorded at the different center were not realized yet. This study tried to invent personal computer module that can digitalize and record of the ECG and design the digital interface that can approach and search digitalized ECG in various part of hospital simultaneously. Materials and Methods : We had designed high-fidelity digital filter and amplifier which can work in very low voltage, had selected multifunctioned microprocessor. Activation X modulation was conducted by MSC 6.0 and Visual Basic 6.0. Softwares were prepared for the transfer of ECG informations from terminal PC to PACS and cardiologic PACS was designed for future application. Results : We have developed the small, portable, very low voltage managed ECG module and high quality digitalized information compression software in OCS and PACS. Conclusion : This invented ECG digital archive module can save hospital cost by substitution of ECG papers for digital storage or on-line storage, therefore ECG data can be handled in multisector of the hospital and through telemedicine. This technology can be applied to domestic ECG digitalizing device development and effective medical transfer system by adoption cordless medical information delivery.

시와 자유와 <죽음> : 김수영론

최유찬 연세대학교 국어국문학과 1985 연세어문학 Vol.18 No.-

An Mo-Theoretical Study of a Series of Chlorionitroso Compounds

崔燦有,金宜洛,白禹鉉 東國大學校 1974 論文集 Vol.13 No.-

염화 Nitroso 화합물들의 S_N2형 반응기구와 반응성을 분자궤도 함수론적 반응성지수로서 연구한 결과 Frontier 전자밀도가 친핵성 치환의 반응성을 설명하는데 가장 적절하며 이 이론을 뒷받침하는 실험값과 잘 일치함을 조사 연구하였다. The relative ease of the occurrence of S_N w and reactivity for the chloronitroso compounds are discussed in connection with the MO-Theoretical reactivity indices. the results show that Frontier electron density can be useful in predicting nucleophilic reactivities. The theoretical conclusion derived are in agreements withe the expermental results.

A Study on the Oxidation of Cobalt Film

崔燦有 東國大學校 1975 論文集 Vol.14 No.-

The kinetics of the oxidation of Cobalt films have been studied using quartz microbalance from 600℃ to 900℃ under various oxygen pressures. The oxidations followed the parabolic rate law in all caces and the parabolic rate constant varied apporximately from 1.64×10^-12 to 1.11×10^-11 (g/cm^2)^2 sec^-1 The activation energies calculated from the plots of log K_p vs. 1/T varied between 0.08 eV and 0.3 eV in the above conditions. The 1/n values obtained from the plots of log K_p vs log Po_2 (or log K_p=1/n log Po_2) are about 1/5 to 1/3.7. The mechanism for the oxidation of the Cobalt film is discussed in accordance with other mechanisms such as nonstoichiometric mechanism, diffusion mechanism, and conduction mechanism, etc.

『토지』와 도스토예프스키 소설의 비교 연구

최유찬 연세대학교 인문과학연구소 1998 人文科學 Vol.79 No.-