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변종철,한충훈,이남호,백종석 濟州大學校 基礎科學硏究所 2001 基礎科學硏究 Vol.14 No.2
diamine류 { ethylenediamine, 1,3-propanediamine, 2,2-dimethyl-1,3-propanediarnine, o-phenyle-nediamine}와 aldehydes { salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-dichloro- salicylaldehyde, 3,5-di-tert-butyl-2-hydroxybenzaldehyde}를 methanol#액에서 축합반응시켜 네 자리 salen형 리간드(H₂L_(acn);n=1-11)를 합성하였다. 이들 리간드의 toluene(또는 methanol) 용액에 Mn(OAc)₂·4H₂O methanol용액을 첨가하고, 공기를 주입시켜[Mn(L_(acn))Cl] 착물을 얻었다. 이들 리간드 및 착물들은 원소분석, 전도도 및 NMR, IR, UV-VIS 분광학법을 이용하여 확인·고찰하였다. A series of tetradentate salen-type ligands(L_(ac)) were been prepared by condensation of diamines { ethylenediamine, 1,3-propanediamine, 2,2-dimethyl-1,3-propanediamine, and o-phenylenediamine} and aldehydes {salicylaldehyde, 5-chlorosalicylaldehyde, 3,5-di-chlorosalicylaldehyde, and 3,5-di-tert-butyl-2-hydroxybenzaldehyde} in methanol. These [Mn(L_(ac))Cl] complexes were synthesized from the reaction of toluene(or methanol) of L_(ac) with methanol solution of Mn(OAc)₂·4H₂O in the presence of air. These ligands and complexes were characterized and confirmed by elemental analysis, conductivity, NMR, IR, and UV-VIS spectroscopy.
위암종과 Epstein-Barr 바이러스와의 연관성에 대한 연구
심광용,김호영,김효열,백순구,권상옥,조미연,이창훈,이종인 건국대학교 의과학연구소 2004 건국의과학학술지 Vol.14 No.-
Objectives: Epstein-Barr virus (EBV) has been known to be linked to a spectrum of neoplastic conditions, including nasopharyngeal carcinoma, Burkitt's lymphoma, peripheral T-cell lymphoma and Hodgkin's disease. This study aims to investigate the association of EBV with gastric carcinoma in Korea. Methods: Fifty-three cases of gastric adenocarcinoma were studied for evidence of EBV infection by EBV-encoded small RNA (EBER) in situ hybridization (ISH) on the paraffin sections and amplifying the EBV genome encoding envelop glycoprotein (gp220) with polymerase chain reaction (PCR) in fresh gastric cancer specimens. Results: EBER was detected in 7 (13.2%) of 53 gastric carcinomas and all cases were male. In 6 (85.7%) of 7 EBER-positive cases, the tumors were located in the upper and middle part of the stomach. EBER ISH study showed strong positivity in all the tumor cells, but negativity in surrouning lymphocytes, stromal cells and normal gastric mucosa. DNA PCR was positive in 23 (43.4%) of 53 gastric carcinomas, including all of 7 EBER-positive cases. Conclusion: We could observe some association of EBV with gastric carcinoma, and our findings about the charateristics of EBV-positive gastric cancers involving sex, site and histological type are similar to those in Japan. However, EBV-positive rate of gastric cancer is higher than in Japan and lower than in Western countries. Further studies to elucidate oncogenic mechanism of EBV in gastric cancer should be performed.
知能的 컴퓨터 補助敎育을 위한 ERIC 시스템 具現에 관한 硏究
정영식,황종선,김창화,인 호,백두권 강릉대학교동해안지역연구소 1990 東海岸硏究 Vol.1 No.2
ICAI시스템은 일반적으로 전문가 모듈, 교사 모듈, 학생모델 모듈 및 인터페이스 모듈의 4가지 構成要素로 구성된다. 本 硏究에서는 4가지 모듈중에서 전문가 모듈과 교사 모듈의 機能을 遂行하도록 하기 위한 지식베이스를 構築하였다. 먼저 必要한 지식베이스들을 分類하고 지식베이스를 構築하기 위한 接近方法들을 硏究하였다. 構築된 지식베이스는 코스웨어 자체에 修正을 가하지 않고 학습전략(learning strategy)을 다양하게 하기 위해서 Domain Knowledge와 Control Knowledge로 分離하였고 Domain Knowledge는 EA모델을 통하여 코스웨어를 構築하였으며, Control Knowledge는 規則基盤(rule-based)을 利用하여 學習進行 및 評價에 필요한 知識들을 構築하였다. 이를 基礎로 하여 ERIC시스템을 設計, 具現하였다. ICAI system consists of the four modules, i.e., expert module, tutor module, student model module and interface module. This paper shows the knowledge base construction to perform the functions of expert module and tutor module of the four modules. At first we identified the essential knowledge bases in ICAI system and researched the approach for the knowledge base construction. The constructed knowledge base was divide into the domain knowledge and the control knowledge to perform the several learning strategies without the courseware modification. The domain knowledge constructed by EA model represents the courseware contents and the rule-based control knowledge represents the information necessary to perform the learning process and student estimation. Based on these methodogies, we designed and implemented ERIC system.