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강석구,정경태,염기대,이광수,박진순,김은진 한국해양과학기술원 2012 Ocean science journal Vol.47 No.4
Uldolmok waterway, located between an island off the southwestern tip of Korean peninsula and mainland, is famous for its strong tidal current that has a maximum current of about 6.0m/s. A series of field observations along with numerical modeling have been carried out in order to understand the tidal dynamics in terms of the force balance along the whole waterway and the energy balance in the narrowest part of the waterway. First, analysis of the ADCP current and the tide level variation data reveals that the tidal dynamics along the total waterway (channel) is balanced dominantly between the pressure gradient and linear bottom frictional forces, with the phase lag of sea level difference for the semi-diurnal constituents leading the current phase about by 10°. Secondly, the result of the numerical modeling reveals that the tidal energy flux vector flows toward the narrowest section, indicating that there should be related nonlinear processes. Through the numerical model experiment with multi-components, the convergence of (M2 + S2) tidal energy flux of 6.68 × 107 Joule/s in the narrow area of the Uldolmok waterway is explained mainly by the energy consumption of 73% through the nonlinear generation of shallow water components and by the bottom frictional energy dissipation of 27%. This reveals that the remarkably strong nonlinear process dominates in the narrowest section of the Uldolmok waterway, compared with other areas, such as Yellow and East China Seas where the total M2 energy flux through the open boundary is balanced in terms of the bottom dissipation (Kang et al. 2003; Choi 1980).
姜錫久,辛永珏 성균관대학교 기초과학연구소 1987 論文集 Vol.38 No.1
A synthesis of (Z)-8-dodecen-1-yl acetate, the sex pheromone of the oriental fruit moth is described. 1,7-Heptanediol was subjected to monobromination to give 7-bromoheptan-1-ol, which was protected with dihydropyran. 7-Bromoheptan-1-ol THP ether thus formed was alkylated with sodium acetylide in ammonia to give 8-nonyn-1-ol THP ether. The lithium anion of 8-nonyn-1-ol THP ether was alkylated with n-propyl bromide to provide 8-dodecyn-1-ol THP ether. Catalytic hydrogenation over Pd/BaSO_4 followed by deprotection and acetylation afforded (Z)-8-dodecen-1-yl acetate(1), the target compound.
프로스타글란딘 중간체 (R)-4-히드록시-2-시클로펜텐온의 합성
강석구,박영원 성균관대학교 1991 論文集 Vol.42 No.1
D-크실로스를 출발물질로 하여 (R)-4-히드록시-2-시클로펜텐온을 합성하였다. D-크실로스에서 유도되는 메틸렌푸라노스를 산성용액에서 탈보호기화한후 이를 염기성 용액에서 분자내 알콜 반응을 거쳐서 (R)-4-히드록시-2 시클로펜텐온을 합성하였다. The synthesis of(R)-4-hydroxy-2-cyclopentenone from D-xylose is describecl. Acid catalyzed deprotection of the methylene furanose acetonide derivecl from D-xy-lose followed by base catalyzed intramolecular aldol condensation as the key reaction afforded (R)-4-hydroxy-2-cyclopentenone.
Cu 촉매하에서 유기주석 화합물과 고분자에 결합된 Iodide의 Cross-Coupling 반응에 관한 연구
강석구,임권호,김재선,윤석근,윤승수 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.2
The copper iodide-catalyzed cross-coupling of polymer bound aryl iodide with organostannanesin N-methyl-2-pyrrolidone (NMP) was accomplishied smoothly in the presence of NaCl.
Hypervalent Iodonium Salt와 Organofluorosilane 의 Cross-Coupling과 Carbonylative Cross-Coupling에 관한 연구
강석구,토쿠따로야마구치,김태현,편성재 성균관대학교 기초과학연구소 1996 論文集 Vol.47 No.1
The palladium-catalyzed cross-coupling and carbonylative cross-coupling of aryl-, alkenyl-, and alkynytfluorosilanes promoted by fluoride ion with hypervalent aryl-, alkenyliodonium tetrafluoroborates were achieved at room temperature under an atmospheric pressure of carbon monoxide.
진딧물의 경보페로몬인 (E)-β-Farnesene의 합성과 생물활성시험
강석구,정경운,이정운,고현관 성균관대학교 기초과학연구소 1986 論文集 Vol.37 No.1
(E)-β-Farnesene, the alarm pheromone of aphids was synthesized from nerolidol by reacting in a sealed tube at 150℃ for 24h with DMSO. Base(KOtBu/DMSO) catalized elimination of HCl from farnesyl chloride at 50℃ for 4h afforded (E)-β-farnesene as the major product. Farnesyl chloride was prepared from nerolidol or farnesol with SOCl_2 or HCl. Biological activity test of (E)-β-farnesene thus synthesized was conducted.
(6S, 7S)-Trans-Laurediol의 합성 연구
강석구,임종석 성균관대학교 1992 論文集 Vol.42 No.2
2-데옥시-D-리보스를 출발물질로 하여 2,3-이소프로필리덴디옥시 알데히드의 염기조건에서의 에피머화 반응을 주요 반응 단계로 하여(6S, 7S)-trans-Laurediol을 합성하였다. A synthesis of (6S, 7S)-trans-laurediol starting from 2-deoxy-d-ribose using the epimerization reaction of 2,3-isopropylidene aldehyde with treatment of base is described.
높은 입체선택성을 나타내는 고리카보네이트의 친핵성 치환반응과 광학활성인 β-Hydroxy Ester의 합성
강석구,박동철,노호식,윤승현,홍덕표 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1
The nucleophilic ring opening of the cyclic carbonates of optically active threo-2,3-dihydroxy esters afforded α-substituted β-hydroxy esters with highly regio- and stereoselectivity under mild conditions. The α-substituted β-hydroxy esters were transformed to β-hydroxy esters