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A Calculation for the Viscosity of Fluids by Using Van Der Waals Equation of State
Jhon, Mu Shik,Chair, Tong Seek,Pak, Hyung Suk,Kim, Won Soo 한국화학공학회 1989 NICE Vol.7 No.3
A new equation for the viscosity of fluid is presented by considering that the viscosity is equal to the product of the shear pressure and the shear relaxation time. The shear pressure and the shear relaxation time are calculated thermodynamically by applying the van der Waals model for fluids. The calculated viscosities for various simple substances are in good agreements with those of the observed values through liquid-critical point-gas region.
Sound Velocity and Van Der Waal's Force in Liquids
Jhon, Mu Shik The Korean Society of Oceanography 1969 韓國海洋學會誌 Vol.4 No.2
Tehoretical calculations of the sound velocity and Van der Waal's force in liquids according to significant structure theory are carried out. The excellent agreements between theory and experiment provide another piece of evidence for its general paalicability of the model. The technique to evaluate those properties may be useful to understand the some properties and structures of sea water.
The Preferred Conformation of the Muscarinic Agent L(+) Acetyl-${\beta}$-Methylcholine
Jhon, Mu-Shik,Cho, Ung-In,Chae, Yung-Bog,Kier, Lemont B. Korean Chemical Society 1972 대한화학회지 Vol.16 No.2
It has been postulated that acetylcholine exhibits both nicotine and muscarinic activity because of its ability to present two patterns of essential atoms to the receptors. These two patterns arise from the ability of the molecule to exist in more than one preferred conformation. The molecule S(+)-acetyl-${\beta}$-methylacetylcholine exhibits only muscarinic activity. Calculations using molecular orbital theory predict that this molecule prefers only the muscarinic conformation. This is offered as an explanation for the exclusive role of the molecule and as evidence supporting the twoconformation, two-activities hypothesis.
The Theory of the One-Dimensional Lattice Defects
Jhon, Mu-Shik,Kim, Shoon-Kyung Korean Chemical Society 1971 대한화학회지 Vol.15 No.4
A general method of calculating the frequency shift due to lattice defects is developed for a one dimensional lattice with an arbitrary number of lattice points. The method is based on the Fourier transform of the equation of motion. It is shown that the frequency spectrum is determined by the roots of 5${\times}$5 secular equation, the coefficients of which depend on defects in the mass and the force constant as well as the number of the lattice points. For the limiting case of infinite lattice, the dimension of the secular equation reduces to three and the result agrees with that of Montroll and Potts.
Thermodynamic Properties of Aliphatic and Aromatic Hydrocarbons in Liquid Water
성용길,김은식,전무식,Sung Yong Kiel,Kim Un Shik,Jhon Mu Shik Korean Chemical Society 1972 대한화학회지 Vol.16 No.5
지방족 및 방향족 탄화수소의 수용액을 Jhon 등이 제창한 liquid water의 significant structure theory 를 이용하여 연구하였으며 Helmholtz free energy, internal energy, entropy, heat capacity 등의 열역학적 성질을 계산하였다. 계산결과는 문헌에 발표된 실험치와 잘 일치됨을 볼 수 있다 The aqueous solutions of aliphatic and aromatic hydrocarbons have been studied on the basis of the significant structure theory of liquid water proposed by Jhon, et al. The thermodynamic properties such as Helmholtz free energy, internal energy entropy, and heat capacity have been calculated. The results show good agreements with the experiments in the literature.
Theoretical Studies on the Potential Energy Profiles for Proton Transfer Reaction in Formamide Dimer
Young Shik Kong,Mu Shik Jhon Korean Chemical Society 1989 Bulletin of the Korean Chemical Society Vol.10 No.6
Theoretical studies on the proton transfer reaction in a formamide dimer have been done by Ab initio SCF calculation. In this study, we have shown several effects on the potential energy profile of the proton transfer in a formamide dimer, such as the effect of a basis set, the effect of a geometry optimization, and the effect of a distance between proton-donor and proton-acceptor.
Theoretical Studies on the Potential Energy Profiles for Proton Transfer Reaction in Formanide Dimer
Kong, Young Shik,Jhon, Mu Shik 全北大學校 基礎科學硏究所 1991 基礎科學 Vol.14 No.1
Theoretical studies on the proton transfer reaction in a formamide dimer have been done by Ab initio SCF calculation. In this study, we have shown several effects on the potential energy profile of the proton transfer in a formamide dimer, such as the effect of a basis set, the effect of geometry optimization, and the effect of a distance between proton-donor and protonacceptor.
The Significant Structures of Liquid Fluorine
전무식,장세헌,Jhon, Mu-Shik,Chang, Sei-Hun Korean Chemical Society 1964 대한화학회지 Vol.8 No.2
H. Eyring등에 의하여 제안된 액체구조에 관한 이론에 따라서 액체의 partition function을 정하였다. parameter $E_S$, $V_S$, ${\theta}$, a는 앞서 저자들에 의해 제안된 방법에 의하여 정하였고, 이렇게 정해진 partition function을 써서 액체의 몰부피, 증기압, 한계점. 증발엔트로피 및 표면장력등을 계산한 결과 실측치와 잘 맞는 값을 얻었다. The partition function of liquid fluorine were developed by applying the theory of significant structures in liquids. The molar volume, vapor pressure, entropy of vaporization and surface tension of the liquid were calculated over a wide temperature range. The critical properties for the liquid were also calculated. The results show good agreement with experimental observations.
Normal Mode Calculations of Faujasite-Type Zeolite Frameworks
Kong, Young-Shik,Jhon, Mu-Shik,No, Kyoung-Tai Korean Chemical Society 1985 Bulletin of the Korean Chemical Society Vol.6 No.2
Normal mode calculations about the extended double six ring (D6R) subunit cluster model of Faujasite-type zeolites have been done by using the valence force field with reasonably adjusted force constants. We have studied for four X, Y zeolites species varying in M$_{f}$(Al/Si + Al) values. The calculated characteristic frequencies of D6R mode (${\nu}_{D_{6}R}$) and the rate of change of ${\nu}_{D_{6}R}$ with the mole fractions of aluminum, M$_{f}$ (Al/Si + Al) values agree well with Flanigen's experimental data; the experimental slope is -79 cm$^{-1}$, while the calculated slope is -82 cm$^{-1}$. Those are the improved results as compared to Blackwell's theoretical study; his predicted slope is -94 cm$^{-1}$.