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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Chemical Society
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Journal DOI :
Korean Chemical Society
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Volume & Issues
Volume 15, Issue 6 - Dec 1971
Volume 15, Issue 5 - Oct 1971
Volume 15, Issue 4 - Aug 1971
Volume 15, Issue 3 - Jun 1971
Volume 15, Issue 2 - Apr 1971
Volume 15, Issue 1 - Feb 1971
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The Theory of the One-Dimensional Lattice Defects
Jhon, Mu-Shik ; Kim, Shoon-Kyung ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 165~169
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
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.
Viscosities of Supercooled Water and Other Liquids
Bahng, Jun-Su ; Hahn, Sang-Joon ; Jhon, Mu-Shik ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 171~175
Significant structure theory has been applied to the viscosities of supercooled liquids with success. In the supercooled region, the effect of free volume decrease is so significant that the thermal effects on the solid-like volume must be considered properly. In addition, the two state theories proposed by Jhon and Eyring for water and Litovitz et al. for boron trioxide have been successfully applied to the structure change in the liquid state. Considered liquids are benzene, carbon tetrachloride, p-xylene, water and boron trioxide.
An ESR Study of Amino Acid and Protein Free Radicals in Solution Part Ⅲ. ESR Study of Lysozyme Free Radical Produced by
Hong, Sun-Joo ; Piette, L.H. ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 177~181
Free radicals of lysozyme produced by
system were studied in aqueous solution at room temperature using ESR with a continuous flow-mixing. The spectra, each consisting of a doublet with 5.5 G splitting and a broad resonance covering 80 G splitting are closely similar in shape to that for solid irradiated in vacuum at
and observed at room temperature immediately on warming. The result is assumed to indicate that the secondary protein radical components formed within 0.01 second, dead time of the mixing chamber, and initiated by hydrogen atom abstraction at
-carbon atom of peptide chain in liquid solution at room temperature are identical to those resulting from the initial formation of a mixture of positive holes and negative ions by ionization processes as well as radical fragments by the rupture of chemical bonds in the solid during similar time at the same temperature. A broad resonance is observed with considerable amplitude on the high field side of the doublet, which is quite dissimilar to the spectra of irradiated solid lysozyme. This resonance was tentatively attributed to the polypeptide free radical in which unpaired electrons are localized on side chain.
Stoichiometry of Hydrazine-Bromate Reaction in Acid Media
Choi, Q.Won ; Jung, Jin ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 183~189
Stoichiometry of hydrazine-bromate reaction has been studied in acid media of varying compositions, elucidating the effects of bromide and chloride ions in sulfuric acid, perchloric acid, hydrochloric acid, and hydrobromic acid at varying concentrations of hydrogen ion and cupric ion. The study shows that the number of red-ox equivalent consumed by one mole of hydrazine becomes practically 4.00 if the concentrations of bromide and hydrogen ions are kept higher than 0.1M and 6M, respectively. The presence of copper tends to reduce the bromate consumption by hydrazine in an irregular manner, but such an effect becomes unimportant if the concentrations of bromide and hydrogen ions are kept sufficiently high.
A New Method of Determination for the Trace Ruthenium in High Purity Palladium by Neutron Activation Analysis
Lee, Chul ; Yim, Yung-Chang ; Uhm, Kyung-Ja ; Chung, Koo-Soon ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 191~197
Ruthenium content in highly purified palladium metal (99.9%) was determined by counting
nuclide which was produced by
nuclear reaction. Palladium sample and ruthenium standard were irradiated by neutron with the Pneumatic Transfer System of TRIGA MARK II reactor. Palladium and ruthenium were dissolved by treating with aqua-regia and by fusing with sodium peroxide flux respectively.
was separated through anion and cation exchange resin columns. The ruthenium content was determined by comparing the
activities, obtained from the palladium sample, with that from pure ruthenium standard. The detection limit of ruthenium by the present method is about 1 ppm of ruthenium in 10 mg of palladium, which is approximately 40 times more sensitive than that of the conventional radioactivation method which employs
Determination of the Formation Constants of Metal Complexes with Organic Acids by Adsorption Method
Jae, Won-Mok ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 199~203
The adsorption method for the determination of the formation constants of the metal complexes with organic acids was developed by using membrane filters. The adsorption method involved the measurements of radioactivities of the adsorbed metal on membrane filters and the filtrate solution after the radioactive metal ion were filtered through membrane filters in the presence of organic ions of varying concentration. Comparing the adsorption method with the ion exchange method, it was seen that the adsorption method was simpler and faster than the ion exchange method. As an example of the metal complex with organic acid yttrium citrate complex was chosen, and the formation constant of the complex obtained by the adsorption method showed
at a pH of 7. Also the present study revealed that the carrierfree state of yttrium in aqueous solution was present in the completely ionized state.
Solvolysis of p-Chlorobenzyl Chloride in Various Aqueous Mixtures
Lee, Suk-Kee ; Lee, Euk-Suk ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 205~209
The thermodynamic parameters for the solvolysis of the p-chlorobenzyl chloride taking place in the various aqueous mixtures were determined. From the application of these data to the formula
the following conclusion was obtained: That the substrate constant a' differs in different aqueous solvent was found, and using each a' value the solvolysis mechanism of p-chlorobenzyl chloride in each aqueous mixture can be determined.
Further Applications of the Solubility Theory to Various Systems
Sung, Yong-Kiel ; Paek, U-Hyon ; Jhon, Mu-Shik ;
Journal of the Korean Chemical Society, volume 15, issue 4, 1971, Pages 211~217
The theory of solubility proposed by Jhon and Kihara has been tested and applied to various systems. In the present paper, the systems are the solubilities of gases such as
in liquid benzene and carbon disulfide, those of solids iodine and naphthalene in the nonaqueous solvents, and those of gases
in the electrolyte solutions. The theoretical values of solubilities are in good agreement with the experimental data in the literature.