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成樂寅 嶺南大學校 社會科學硏究所 1985 社會科學硏究 Vol.5 No.1
Le regime politique de la ?? Republique presente beaucoup de transformations du pouvoir executif. Pendant la :?? et ?? Republique, la France sest adoptee au regime parlementaire. Le pouvoir executif etait dirige par le premier ministre non pas le president de la Republique. Le caractere du regime politique de la ?? Republique est difficile a definir en un not. Ni-regime parlementaire, ni regime presidentiel! En general, on l'appelle regime mixte, mi-presidential ou mi-parlementaire. C'est un amalgame entre les deux. Dans ce regime, president de la Republique est "la cle de voute". La revision de la Constitution en 1962 renforce son statut. Notre etude est divisee en deux grandes parties. Dans la premiere partie, nous reflechissons sur l'interpretation de norme (texte) constitutionnelle du pouvoir et du statut du President de la Republique et de ceux du premier Ministre. Dans la deuxieme partie, nous reflechissons sur l'evolution et la pratique des rapports entre le pouvoir executif et le pouvoir legislatif. Nous examinons, surtout, la possibilite dynamique des rapports entre le president de la Republique et le premier Ministre dans la pratique constitutionnelle de la ?? Republique.
성낙도,박창식,장석찬,최경섭 한국동물생명공학회(구 한국동물번식학회) 2006 Reproductive & developmental biology Vol.30 No.3
돼지 페르몬성 분자를 탐색하기 위하여 일련의 green odorant로서 기질 분자인 2-(cyclohexyloxy)tetrahydrofurane 유도체들의 정량적인 구조와 수용체인 porcine odorant binding protein (pOBP) 사이의 결합 친화력 상수(p(Od)50)에 대한 비교 분자 유사성 지수 분석(CoMSIA)을 실행하였다. 가장 양호한 CoMSIA 모델(I-AI)은 기질 분자내 입체 중심의 절대 배열이 I: C1'(R),C2(S)인 분자를 atom based fit 정렬하였을 경우의 입체장 조건에서 유도되었으며 PLS 분석 결과, 예측성이 r2cv.(q2)=0.856 그리고 적합성이 r2ncv.=0.964이었다. 모델의 CoMSIA 등고도 상, pOBP와 냄새 분자 사이의 상호작용으로부터 가장 높은 결합 친화력을 나타내는 분자의 구조적 특징들을 이해할 수 있었다. To search of a new porcine pheromonal odorants, the comparative molecular similarity indices analysis (CoMSIA) between porcine odorant binding protein (pOBP) as receptor and ligands of green odorants 2-(cyclohexyloxy)tetrahydrofurane derivatives as substrate molecule were conducted and disscused quantitatively. In the optimized CoMSIA model (I-AI) with chirality (I: C1'(R), C2(S)) in substrate molecules and atom based fit alignment (AF) of the odorants, the statistical PLS results showed the best predictability of the binding affinities based on the LOO cross-validated value r2cv. (q2=0.856) and non cross-validated conventional coefficient (r2ncv.= 0.964). The structural distinctions of the highest active molecules were able to understand from the interaction between pOBP and green odorants in the contour maps with CoMSIA model.
성낙도 한국농화학회 1989 Applied Biological Chemistry (Appl Biol Chem) Vol.32 No.2
In order to seek the molecular basis of higher insecticidal activity of the carbamates with two methyl groups, m-xylyl-N-methylcarbamate(MXNMC) than the corresponding unsubstituted phenyl N-methylcarbamate(PNMC), these two derivatives have been studied by molecular orbital(MO) theoretically using extended Hu◎ckel theory(EHT), and analysis of regression and linear free energy relationship(LFER). The most stable stereo structure(Z,Z) shows that the phenyl group occupies vertical(θ=90°) position on the plane of the N-methylcarbamyl group. Regression analysis shows that especially good correlation exists between the pI_(50) values and the calculated MO quantities when the hydrogen atomic charge of metaposition and of m-methyl groups, and LUMO energy are taken as variables. The LFER analysis on the carbamylation indicates that field(F) effect(60%) is slightly larger than resonance(R) effect(40%) in PNMC(F$gt;R), whereas, in case of MXNMC, R effect(98.6%) is much larger than F effect(1.4%)(R≫F). From the basis on the findings, the enhancement of insecticidal activity of MXNMC may be the result of hyperconjugation by m-methyl groups.
Benzenesulfonylimido Phosgene 의 加水分解 反鷹메카니즘과 反鷹速度論的 硏究
성낙도,한선호,권기성,김태린,Sung, Nack-Do,Han, Sun-Ho,Kwon, Ki-Sung,Kim, Tae-Rin 대한화학회 1984 대한화학회지 Vol.28 No.4
1 : 4 dioxane-물의 혼합용매중에서 benzenesulfonylimido phosgene의 가수분해 반응속도 상수를 자외선 분광법으로 측정하여 넓은 pH범위에서 잘 맞는 반응속도식을 구하였다. Grunwald-Winstein식에 적용하여 pH4.0에서 m=0.4의 값을 얻었으며 열역학적 활성화 파라미터 값은 pH4.0에서 ${\Delta}H^{\neq}$ = 15kcal/mol과 $ {\Delta}S^{\neq}$ =-21e.u 그리고 pH10.0에서는 $ {\Delta}H^{\neq}$ = 8kcal/mol, ${\Delta}S^{\neq}$ = -39e.u.이었다. 이와 같은 결과로부터 잘 알려져 있지않은 benzenesulfonylimido phosgene의 친핵성 첨가-제거 반응메카니즘을 정량적으로 잘 설명할 수 있었다. The rate constants for the hydrolysis of benzenesulfonylimido phosgene at various pH were determined by ultraviolet spectrophotometry in 1 : 4 dioxane-water mixed solvents at 25$^{\circ}$C and a rate equation which can be applied over a wide pH range was obtained. Based on the Grunwald-Winstein equation, m = 0.4 was obtained. The thermodynamic activation parameters for the hydrolysis were ${\Delta}H^{\neq}$ = 15kcal mol$^{-1}$, ${\Delta}S^{\neq}$ = 21e.u. at pH 4.0 and $ {\Delta}H^{\neq}$ = 8kcal. mol$^{-1}$, ${\Delta}S^{\neq}$ = -39e.u. at pH 11.0, respectively. It was concluded that the hydrolysis of benzenesulfonylimido phosgene in 1 : 4 dioxane-water mixed solvents proceed via nucleophilic addition-elimination.