• Bulletin of the Korean Chemical Society
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• 제10권2호
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• pp.134-137
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• 1989

The reaction of $CpMo(CO)_3-M^+(M^+,\;Li^+,\;Na^+,\;K^+,\;PPN^{+a})$ with allyl halide was performed and the details of its counterion effects and solvent effect was investigated under the pseudo-first order conditions. The kinetic data from this reaction were compared with those from the reaction of the same anion with benzyl halides in terms of their inverse counterion effects.

• Bulletin of the Korean Chemical Society
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• 제19권12호
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• pp.1334-1336
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• 1998

Kinetic studies are carried out on the reactions of 2-chloro-2-propen-1-yl arenesulfonates with anilines and N,N-dimethylanilines in acetonitrilile at 45.0 ℃. The 2-chloro substituent is found to deactive the allyl moiety with considerable decrease in the rates. The sign and magnitude of the cross-interaction constant (ρxz 0.3) and the inverse secondary kinetic isotope effect (kH/kD 0.92) support an SN2 mechanism with a relatively tight transition state. The possibility of an SN2' mechanism can be safely precluded based on the ρxz values observed.

• Bulletin of the Korean Chemical Society
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• 제16권7호
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• pp.657-661
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• 1995

Kinetic studies are carried out on the reaction of S-phenyl dithiobenzoates with benzylamines in acetonitrile at 30.0 ℃. Small magnitude of ρX (βX) as well as ρZ (βZ) obtained suggests rate-limiting nucleophilic attack of the thiocarbonyl carbon. This is supported by the unusually small magnitude of ρXY and ρYZ, albeit their signs do not agree with those expected. Moreover, the inverse secondary kinetic isotope effects (kH/kD<1.0) involving deuterated benzylamine nucleophiles are also in line with the proposed mechanism.

• Bulletin of the Korean Chemical Society
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• 제11권3호
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• pp.221-224
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• 1990

A kinetic study of the heterobimetallic dimer disruption of $PPN+^aCrMn(CO)_{10}$- by ligand L(L = CO, $PR_3$) is described. The rate was determined in several aprotic solvents. The results indicated that the reaction of $PPN+^aCrMn(CO)_{10}$- with $PR_3$ is of first order with respect to [$PPN+^aCrMn(CO)_{10}$-] and the heterolytic Cr-Mn bond dissociation energy is approximately 27 kcal/mol.

• 만화애니메이션 연구
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• 통권33호
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• pp.363-382
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• 2013

TV 방송 프로그램에서의 '타이포그래피'는 10여 년 전만해도 단순히 영상의 이해나 정보 전달을 위한 보조 역할에 불과했지만, '키네틱 타이포그래피(Kinetic Typography)'라는 새로운 형태의 타이포그래피 방식을 사용하여 방송제작에 중요한 구성요소로 자리 잡았다. 더 나아가 비주얼로서의 기능과 예술 표현의 수단이 되었으며, 특히 이러한 키네틱 타이포그래피는 TV 예능 프로그램에서 자주 접할 수 있다. 본 논문에서는 TV 예능 프로그램 중에서도 시청률이 높게 나타난 <1박2일>, <런닝맨>, <무한도전> 세 프로그램을 전개방식, 위치, 자막의도, 표현기법, 색상, 서체 등 여섯 가지로 나누어 분석하여 키네틱 타이포그래피의 활용 요소와 디자인적 요소를 알아보고자 한다. 키네틱 타이포그래피의 활용 요소인 전개방식에서는 Cut에서 시작해 Cut으로 끝나는 기법이 주를 이루지만, 그 외의 기법은 <무한도전>의 경우 Z축인 줌인(Zoom-In), 줌아웃(Zoom-Out), <1박2일>은 X축인 펜(Pan), <런닝맨>은 Y축인 틸트(Tilt)를 주로 사용하여 대화와 상황표현을 나타냈다. 타이포그래피의 디자인적 요소를 나타내는 표현기법, 색상, 서체에서는 큰 공통점을 제외한 나머지 요소는 각 프로그램의 개성에 따라서 다르게 나타났다. 이와 같은 분석을 토대로 도출되는 결과는 앞으로 TV 예능 프로그램의 발전과 방송매체 관계자들에게 앞으로 나아갈 키네틱 타이포그래피의 활용방안을 제시해 본다.

• Bulletin of the Korean Chemical Society
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• 제33권10호
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• pp.3274-3278
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• 2012

The kinetic studies on the reactions of phenyl N-phenyl phosphoramidochloridate (8) with substituted anilines ($XC_6H_4NH_2$) and deuterated anilines ($XC_6H_4ND_2$) have been carried out in acetonitrile at $60.0^{\circ}C$. The obtained deuterium kinetic isotope effects (DKIEs; $k_H/k_D$) are huge secondary inverse ($k_H/k_D$ = 0.52-0.69). A concerted mechanism is proposed with a backside attack transition state (TS) on the basis of the secondary inverse DKIEs and the variation trends of the $k_H/k_D$ values with X. The degree of bond formation in the TS is really extensive taking into account the very small values of the DKIEs. The steric effects of the two ligands on the rates are extensively discussed for the aminolyses of the chlorophosphate-type substrates on the basis of the Taft equation.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집E
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• pp.702-707
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• 2001

The characteristics of flow in dividing regions are precise, therefore their classification is very important not only in industry but also in hydrodynamics. By now, many studies of flow in dividing regions have been performed, but flow characteristics that use visualization in dividing regions have not been studied. The present study of the PIV and the CFD exhibit average velocity distributions, kinetic energy distributions and total pressure distributions etc of the total flow field due to the development of the accurate visualization optical laser and of optical equipment. Also, PIV is accurate with the flows characteristics of the dividing region as continuous analysis is done using input equipment. The study analyzes average velocity vector field, average kinetic energy, x-axis stress distributions, average and total pressure distributions of dividing regions with flow for visualization of the PIV and the CFD measurement in a dividing rectangular duct.

• 한국세라믹학회지
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• 제28권6호
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• pp.429-436
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• 1991

Silicon carbide has been grown by a chemical vapor deposition (CVD) technique using CH3SiCl3 and H2 gaseous mixture onto a graphite substrate. Based on the thermodynamic equilibrium studies and the suggestion that the deposition rate of SiC is controlled by surface reaction theoretical kinetic equation for CVD of silicon carbide has been proposed. The proposed theoretical kinetic equation for CVD of silicon carbide agreed well with the experimental results for the variation of the deposition rate as a function of the partial pressure of reactant gases. The Vikers microhardness of the SiC layer was about 3000∼3400 kg/$\textrm{mm}^2$ at room temperature.

• 한국염색가공학회지
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• 제18권5호
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• pp.42-47
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• 2006

A mixed adsorbent prepared by pyrolysing a mixture of carbon and flyash in 1:1 ratio was tested for its deceleration ability for three different classes of dyes namely, Astrazone Blue FRR(Basic Blue 69), Teflon flue ANL(Acid Blue 125) and Verofix Red(Reactive Red 3GL). Kinetic analyses were carried out at the optimum conditions obtained by the author in the previous studies. The data was fitted with three kinetic model equations. The results showed that the dye uptake mechanism followed the second-order rate expression.

• 약학회지
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• 제33권1호
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• pp.64-71
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• 1989

Since time-dependent inactivation of MAO was found to be complete in a few minutes when high concentration ratios of tranylcypromine to MAO were used, a method to obtain kinetic parameters was sought suitable to the conditions in which concentrations of tranylcypromine analogs did not exceed that of MAO. For the purpose, kinetic equations were derived and the method applied to the kinetic studies of tranylcypromine enantiomers. It was found that (E)-(+)-2-phenylcyclopropylamine inhibited MAO by the mechanism following bimolecular reaction scheme with $\tilde{K}_i$ of $2.0\;{\times}\;10^6M^{-1}min^{-1}$. Whereas, MAO-inhibitory pattern of the (-)-enantiomer was to be interpreted by suicide inhibition scheme and measured $k_{in}\;and\;\tilde{K}'$ were $0.457\;min^{-1}\;and\;$5.4{\mu}M$, respectively.