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웹을 기반으로 인성과 창의력을 기르는 ICT 교재 개발에 관한 연구
김학원,고병오,Kim, Hak-Won,Ko, Byung-Oh 한국정보교육학회 2001 정보교육학회논문지 Vol.5 No.1
Several problems occur including lack of humanity, confinement of creativeness, lack of independent learning capability, when elementary students are taught computer, since the they learn only basic functions of computer in general. Accordingly, it is required to have subject-integrated textbook with which they learn curriculum and nurture the humanity as well as creativeness, while studying functions of computer. In light of this, I plan to develop computer textbook, which divided the contents of Hangul 97 and Windows 98, operation system, per subject, and organized them in the order of question to study for himself, part to learn function, formation evaluation, study on subject integration study related to curriculum, part to raise creativeness, and supplementary study, after extracting the contents of curriculum, creative factor and humanity factor suitable for each subjects. By realizing the subject-integrated textbook that enables the interaction by taking advantage of dynamic feature of web, this textbook aims to raise the humanity and creativeness while learning the functions of computer.
10-단일치환된 Anthrone으로부터 9-치환된 Anthracene 유도체의 합성
김학원,홍수동,윤병훈,김지한 경희대학교 환경연구소 1997 環境硏究 論文集 Vol.7 No.-
Direct syntheses of 9-(3-propenyl)anthracene(l0) and 9-(3-ethoxy-3-oxopropyl) anthracene(l3) were reported. 9-(3-Propenyl)anthracene(l0) was prepared from the NaBH_(4) reduction of 10-(3-propenyl)anthrone(7). Also, 9-(3-ethoxy-3-oxopropyl)anthracene(13) was prepared from the NaBH_(4) reduction and the subsequent P_(2)O_(5) dehydration of l0-(3-ethoxy-3-oxopropyl) anthone(l1)
항생물질 Tetracycline의 유도체 합성에 관한 연구
김학원 慶熙大學校 材料科學技術硏究所 1994 材料科學技術硏究論集 Vol.7 No.-
This work describes studies aimed at the synthesis of analogs of antibiotic tetracycline. Tetracyclines are a family of broad spectrum antibiotics which have a common perhydronaphthalene skeleton. They have a wide spectrum of antibiotic activity and also chelate various metal ions to form complexes. The synthesis of possible metal complexing analogs of tetracycline have been complete from readily available compound 6. The starting material 6 was transformed to the aldehyde intermediate from selective methylation. O-allylation, Claisen rearrangement. olefine isomerization, and ozonolysis. The aldehyde intermediate 11 was converted to the several final compounds by the formation of ketoester intermediate and the selective C-acetylation followed by deprotection or methyl ether. Deprotection gave the unexpected compounds which have a flavonide-like structure.
항히스타민제 Ebastine의 합성 및 그 유도체 합성에 관한 연구
김학원,강정호 경희대학교 산학협력기술연구원 2000 산학협력기술연구논문집 Vol.6 No.-
We have synthesized 4-[4- (benzhydryloxy -1-4- (tert-butyl)phenyl]-1-butanone]piperidine (12), ebastine, which is a synthetic antihistamine by a coupling reaction of 4- (benzhydryloxy)piperidine with 4-tert-butyl-4-chlorobutyrophenone. Also, some of new N-alkylated piperidine compounds were prepared and compound 6 was converted to the corresponding ester-type ebastine derivative 10 by the EDCI cou81ing with p-tert-butyl benzonic acid
김학원,김태균,홍수동 경희대학교 환경연구소 1998 環境硏究 論文集 Vol.8 No.-
Efficient syntheses of several 9-substituted anthracene derivatives have been one. Compounds 5, 6, 7 have been prepared from 10-monoallylated anthrone. Compound 8, 9, 10, 11, 12 have been synthesized from anthrone by the DCC coupling reaction with several acids or the base mediated coupling reaction with acyl chlorides. Compounds 14 and 15 have been prepared from the Witting reaction of 9-anthryl carboxaldehyde. 9-Substituted anthracene derivatives might be useful for environmental use and functional polymeric materials.