Dideoxyribonucleotide의 비효소적인 방법에 의한 합성과 분리방법

이상직,송병수 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-

A protected dinucleotide, 5'-O-dimethoxytritylthymidylyl-(3'→5')-3'-O-acetyl-N??-benzoyldeoxyadenosine, was synthesized by 'Phosphodiester Method' and separated by solvent extraction/recrystalization. The amino group of the base, 3'-hydroxyl group of deoxyadenosine-5'-monophosphate, and 5'-hydroxyl group of thymidine were previously protected with benzoyl, acetyl, and di-p-methoxytrityl group respectively before the condensation between the nucleotide and the nucleoside was conducted. The condensation reaction was more efficiently conducted with triisopropyl benzenesulfonyl chloride(TPS) than with dicyclohexylcarbodiimide(DCC). The dinucleotide synthesized was purified utilizing solvent systems isopropyl ether/0.5M triethylamminium bicarbonate (TEAB), ethyl ether-ethyl acetate (5:5, v/v)/0.5M TEAB, and 0.5M TEAB/CH₂CL₂-CCl₄(4:6, v/v). This method was more efficient than the ordinary diethylaminoethyl (DEAE) cellulose column chromatography.

19세기 한문장편소설의 사회문화적 배경 연구

이병직 부산대학교 한국민족문화연구소 2001 한국민족문화 Vol.17 No.-

This part summarized the survey contents of popularity of Korean novel in Chinese letter. First, the intelligent class in late Chosen went through self-conflict and increased in number. However in those days the society not only gave no good positions in government office to them but also had no social devices. This made them feel the necessity to show their desire and ideal indirectly, which was the background of the novel creation. Second, the writers in 19th century belonged to Sa Da Bu class, and they were interested in the Confucianism, In addition, they had great interest in various field such as Practicalism, Buddhism, and Do Sun Idealism. The writers contained many kinds of knowledge and showed Confucianism, Buddhism, and Goodness Idealism freely in their works. The 19th century Korean novel writers communicated directly with Sa Dae Bu people who lived in suburban area of centered city, Seoul. Also they had connection with them indirectly by way of mediator. That is, their works were based on tacit influence. Third, the writers had conversations about the novels in group and kept a record in criticism style. Especially in < Sam Han Sub Yu> there were an preface of Sa Dae Bu like Hong Suk Ju and Kim Mae Sun. There were criticism of 14 people like Park Yong Bo in <Yuk Mi Dang Gi>. In this point, these examples made it clear that novel creation and criticism were not individual and closed but collective and opened. Fourth, 19thcentury Korean novels in Chinese letter succeeded to tradition in our novel history from the Late shin La-the early Go Re. The writers used former descripitive patterns variously. That means they proceeded former novels in a positive way. Also they sough some change intentively in works and carried out new creative spirit although they accepted former aged novels. That means they adopted former patters in a critical way.

다공질 실리콘 카바이드의 제작 및 광발광 성질

이기환,오제직,최석남,박병빈,이태호,김영유 공주대학교 사범대학 과학교육연구소 1998 과학교육연구 Vol.29 No.1

p-type α-SiC(4H, 6H, 15R polytype)를 사용하여 다공질 실리콘(porous silicon; PS)의 제작방법과 유사하게 HF/H₂O/C₂H??OH 용액에서 전기화학적으로 에칭을 하여 광발광 특성을 가지는 다공질 실리콘 카바이드(porous silicon carbide; PSC)를 제작하였다. PSC의 다공질의 분포는 전류밀도가 증가할수록 증가하고 다공질의 크기는 감소하였으며 광발광(photoluminescence; PL) 스펙트럼의 분석을 통해 전극 표면에서의 산화반응은 공급되는 전자의 양과 전류밀도에 의존하며 전류밀도가 증가할수록 전극의 산화반응은 억제된다는 결과를 얻었다. Porous silicon carbide(PSC) having photoluminescence(PL) can be prepared by a technique very similar to that used in porous silicon preparation, by electrochemical etching of crystalline p-type α-SiC(4H, 6H, 15R polytype) in ?? solution. The results show that porous distribution increase with increasing of the current densities while pore size decrease with that. Through the PL spectra analysis anodic oxidation of electrode surface was dependent on the amount of provided electrons and the current densities and inhibited with increasing of the current densities.

중부지방의 난대성 수종 기후 적응도 분석 : 세종특별자치시 수산리 배재대학교 수목실습장을 대상으로

서병기, 안영직, 이윤구 배재대학교 자연과학연구소 2018 自然科學論文集 Vol.29 No.1

This study was carried out to monitor the growth of warm-temperate species that are planted in the Sejong practice field of Pai Chai university and evaluated the degree of adaptation of the species in the midlands. Trees less than two years were sampled and investigated for the analysis of the climatic characteristics of the practice field. Also, this survey identified the growth characteristics and climate adaptation of warm-temperate woody species. This general forests, unlike significance in terms of the experiment excludes the pressure of the outside within the same conditions were limited to the temporal scope only the initial growth characteristics of the short forested study period. In the future study, the continuous survival rate, investigation and analysis of the physico-chemical resistance in various aspects of soil analysis should be need to look at the trends and characteristics of the additional growth. 본 연구는 세종특별자치시 수산리 배재대학교 수목실습장에 식재한 난대성 수종의 생장량을 측정하여 중부지방의 적응정도를 파악하고자 하였다. 배재대학교 수목실습장의 기후특성 분석을 통해서 수목의 생장량과의 연관성을 파악하였다. 배재대학교 세종 수목실습장에 식재한 수목을 종별로 표본추출하여 생장량을 측정하였다. 중부내륙지방에 식재한 난대성 2년 미만의 수령에 해당하는 수종의 생장특성 및 기후적응여부를 조사하였다. 연구기간이 짧아 수목의 초기 생장특성만을 시간적 범위로 한정하였다. 수목의 적응여부를 살펴보기 위한 과정으로 생장량과 고사율만을 살펴보았다는 데서 한계점이 있어 차후 연구에서는 지속적인 예찰을 통해 추가적인 생장특성의 변화추이를 살펴보고, 토양의 이화학성 분석 등 다양한 관점에서의 조사가 이루어져야 할 것이다.

熱間 DIE STEEL 5種(SKD5)의 熱處理에 對하여

李炳直 釜山工業大學 1967 論文集 Vol.5 No.-

Deoxyribonucleoside의 보호와 di-p-Methoxytrityl기의 제거에 대한 Alcohol류의 효과

이상직,송병수,김대연 嶺南大學校附設 基礎科學硏究所 1984 基礎科學硏究 Vol.4 No.-

5'-O-Dimethoxytritylthymidine and N-benzoyl-5'-O-dimethoxytrityldeoxyade-nosine were synthesized from the corresponding deoxynucleosides and some factors influencing their yields were also investigated. To remove the dimethoxytrityl group from 5'-O-Dimethoxytritylthymidine and N-benzoyl-5'-O-dimethoxytrityldeoxyadenosine, ZnBr₂/CH₃NO₂, ZnBr₂/CH₃NO₂in the presence of alcohols, and CH₃COOH/CH₃NO₂systems were employed. The rates of the detritylation as well as the extent of side reaction in these systems were estimated and the effect of alcohols on the reactions was discussed.

Slag反應에 依한 Si 및 S의 變動 : Cupola Operation에서

李炳直 釜山工業大學校 1969 論文集 Vol.9 No.-

Internucleotide Phosphotriester Bond 형성에 따른 Arylsulfonyl azolide계 축합시약의 반응성

이상직,김대연,송병수 嶺南大學校附設 基礎科學硏究所 1985 基礎科學硏究 Vol.5 No.-

Arylsulfonylimidazoles, arylsulfony-1,2,4-triazoles and arylsulfonyl-3-nitro-1,2,4-triazoles were synthesized and employed in the formation of a phosphotriester bond between appropriately protected monodeoxyribonucleotides. New condensing agents, benzenesulfonyl-3-nitro-1,2,4-triazole, and p-toluenesulfonyl-3-nitro-1,2,4-triazole were found to be excellent in the dideoxyribonucleotide synthesis via the phosphotriester method.

各種 Stress가 痢疾아메바感染에 미치는 影響

李秉稷 연세대학교 의과대학 1968 연세의대논문집 Vol.1 No.1

Wavelet 기법을 이용한 하수관거 영상의 균열인식

손병직 ( Son Byung-jik ),이규환 ( Lee Kyu-hwan ) 한국복합신소재구조학회 2020 복합신소재구조학회논문집 Vol.11 No.6

저해상도 하수관거의 균열을 탐지하기 위해서 웨이블릿 기법을 이용하여 연구를 수행하였다. 변수 4개를 설정하여 파라미터 연구를 수행하였으며 기존 CNN 기법의 연구와 비교를 통해 타당성을 검증하였다. 연구 결과 본 연구에 제시된 파라미터 변수들의 기본값만 사용하더라도 97.2%의 높은 정확도를 나타내었으며, 정확도가 들쭉날쭉하지 않고 안정성을 나타내었다. 따라서, 웨이블릿 기법을 활용하여 구조물의 균열 등 결함 인식 등의 문제를 잘 해결할 것으로 판단되며 향후 연구로 딥러닝 기법과의 상호 보완적인 방법을 모색하고자 한다. In this study, the wavelet technique was used to detect cracks in low-resolution sewage pipes. A parameter study was conducted using four variables, and the validity was verified by comparing the results of the wavelet technique with those of the currently used CNN technique. The results show that, even if only the default values of the parameter variables presented in this study are used, the accuracy is 97.2%, is not jagged, and shows stability. As such, the wavelet technique can be used to recognize defects like cracks in structures. Future research should seek a complementary method that uses the deep learning technique.