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分光光度法에 依한 Iodine 의 Pyridine 및 Quinoline 溶液의 硏究
박종회,Park, Chong-Hoe 대한화학회 1962 대한화학회지 Vol.6 No.1
Spectrophotometric studies have been made on the solutions of elementary iodine in pyridine and quinoline, in the absence of light. The results shown that triiodide ion is produced in both solutions with different rates, and that triiodide ion behaves differently in both solutions. Iodine reacts slowly with pyridine, giving rise to triiodide ion, which is relatively stable in this solvent, hereas, iodine reacts rapidly with quinoline, forming triiodide ion, which interacts further with the medium at slow rate. It has been thought that the difference of the behavior of triiodide ion in both solutions may be due to the stronger basicity of quinoline than pyridine.
Methylene Blue의 분자회합에 미치는 용매효과
박종회,박무순,박희억,서성원 충남대학교 1985 忠南科學硏究誌 Vol.12 No.2
A typical metachromatic dye, methylene blue(MB), has been found not to associate in ethanol, ethylene glycol, glycerol and 80 wt.% dioxane. The absorption spectra observed in the various kind of organic solvents are in good agreement with the calculated monomer spectra in both the shape and the absorption intensity. These results suggest that the water molecules play an important role in self-association of the dye molecules in aqueous solution. In this study, the changes in intensity and frequency shift of absorption spectra of MB are observed in the mixtures of water and organic solvents with the change in wt.% organic solvent. The discussions are made both upon the change in intensity and the frequency shift. The intensity changes are attributed to the change in the degree of association and the frequency shift is explained in terms of the interaction between the energy states of the MB molecules and the solvent polarity.
최적 설계 - 상태의 회귀분석에 근거한 트러스 구조의 예비설계
박종회,황진하,김태형,정진덕 충북대학교 건설기술연구소 1999 建設技術論文集 Vol.18 No.2
A new method that performs preliminary design based on regression analysis is presented in this paper. The statistical correlation between design model and analysis model is analyzed and then regression model which is relative to optimum design-state is derived. The statistical significance of the fitted regression model is verified by F test based on analysis of variance. In order to validate usefulness of the estimated regression model, it is applied to the design initialization problem which provides initial values to start design procedure. The validity and efficiency of this approach are demonstrated and verified by some test examples of trusses.
충격관내에서의 n-핵산-산소 혼합물의 점화지연에 관한 연구
박종회,최기영,윤석승,최성락 충남대학교 자연과학연구소 1984 忠南科學硏究誌 Vol.11 No.1
The ignition delay of n-hexane-oxygen mixture in a shock tube has been theoretically calculated adapting the ignition reaction model of the H_2-O_2 fuel system at pre-ignition step. It has been presumed that the reaction model for the oxidation of n-butane, which was proposed previously, would be safely applied for the oxidation of n-hexane.
유기색소분자와 전해질고분자 사이의 상호작용 효과에 관한 구조론적 연구 (I). Methylene Blue 및 Acridine Orange의 Stacking 효과
박종회,신대현,윤석승,박무순,이홍,Chong Hoe Park,Dae Hyun Shin,Sock Sung Yun,Moo Soon Park,Hong Lee 대한화학회 1986 대한화학회지 Vol.30 No.3
전해질 고분자인 polyvinylsulfate(PVS) 및 polystyrenesulfonate(PSS) 존재하에서 나타나는 methylene blue(MB) 및 acridine orange(AO)의 metachromasy현상을 각각 분광학적 방법으로 연구하였다. P/D값의 변화에 따르는 meta-band의 특성적 변화는 stacking이론에 의하여 설명하였으며 PVS-dye계의 stacking효과는 PSS-dye계의 그것보다 더 강하였거 MB가 AO보다 더 강한 stacking효과를 나타냄을 발견하였다. 전에 제안한 바 있는 평면구조의 방향색소들이 수용액속에서 형성하는 dimer의 모형과 dimension을 근거로 고분자사슬 표면에 결합되어 있는 색소분자들의 stacking 모형을 제안하였으며 이 모형을 제안하였으며 이 모형은 여러 연구자들에 의하여 밝혀진 실험적 결과와 비교 검토한 결과 합리적임이 발견되었다. Spectroscopic studies have been carried out on the metachromatic behavior of methylene blue(MB) and acridine orange(AO) in the presence of polyvinylsulfate(PVS) and polystyrenesulfonate(PSS) The characteristic changes of meta-band with the change of P/D value are discussed in terms of stacking theory. It has been found that the stacking effect in the PVS-dye system is stronger than that in the PSS-dye system and that MB shows stronger stacking effect than AO. A stacking model and dimension of bound dyes on the surface of polymer chain is proposed on the basis of the previously suggested model of dimer found in the aqueous solution of planar aromatic dyes. The proposed model is found to be reasonable in accordance with the experimental results obtained by various workers.