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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korean Chemical Society
Journal Basic Information
Journal DOI :
Korean Chemical Society
Editor in Chief :
Volume & Issues
Volume 8, Issue 4 - Dec 1964
Volume 8, Issue 3 - Sep 1964
Volume 8, Issue 2 - Jun 1964
Volume 8, Issue 1 - Mar 1964
Selecting the target year
Reaction of Potassium Fluoride with Orgarnic Halogen Compound-II. Dimerization, Fluorination, and Decarboxylation of Organic Iodo acids, Iodides, and Polychlorinated Acid Ester
Kim, You-Sun ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 135~141
The reaction of potassium fluoride with amyl iodide in presence of dimethylformamide at low temperature gave a fluorination product together with decane. Polyhalogenated acid such as
-phenyl-propionic acid gave
-chlorostyrene, fluorinated styrene, and fluorinated acid. The same reaction with the ethyl ester did not give the fluorination product and gave a mixture of various dimerized product. Dibromostyrene gave bromostyrene together with fluorination product. Iodo acid such as m-iodo acid gave the salt and a trace quantity of dimerized product. Iodides such as m-iodotoluene and 1-amino-4-iodo-2-methyl benzene did not show any appreciable reactivity towards potassim fluoride. The reaction condition was described, and fluorination,
-dehydrofluorination, decarboxylation, and dimerization were discussed.
Studies on the Light Fastness of Dyeings. (II) Fading Rate Curve
Ha, Wan-Shik ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 142~146
The author proposed an equation of fading rate, expressed as
=fading of dye (colour difference of N.B.S. unit),
=extremity value of fading of molecularly dispersed dye,
=constants, t=exposure (hours). The validity of above equation, which is connected with the state of dye in fibre, was confirmed by experimental in a range of 2-3 colour fading in grey scale value for assessing change in colour visually, except the case of increasing the fading rate with the time resulted from the break-down of dye particles through the heat effect of light; it was also discussed about possiblity of evaluating of fastness to light of dye in early stage.
Study on Metal Cupferrate Complex (Part IV). Determination of Vanadium(IV) and Vanadium(V) Cupferrate Compositions
Kim, Si-Joong ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 147~152
Vanadium (IV) and vanadium (V) cupferrate compositions in benzene phase were determined by molar ratio method and continuous variation method spectrophotometrically at 450
of wavelength. Compositions of vanadium (IV) cupferrates, V(IV)/Cupf, varied from 1/2 to 1/4 with the acidity of solution from which the complexes were precipitated. The complexes precipitated were vanadium(IV) cupferrate(
) in solution with lower pH than 1.0, and vanadyl(IV) cupferrate (
) in solution with 1.8-4.3 of pH. It was considered, however, that the complexes in solution with 1.3-1.7 of pH might be hydrogen vanadyl(IV) cupferrate (
) or nearly equimolar mixture of
complexes. Vanadium (V) cupferrate composition did not vary with the acidity of solution from which the complexes were precipitated. In solution with lower pH than 1.8, the complex precipitated was hydrogen vanadyl (V) cupferrate,
Syntheses of Substituted tert.-Butyl(o-tolyl)-perpropionates
Hahn, Chi-Sun ; Martin, Michael M. ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 153~157
The syntheses of substituted tert.-butyl
-(o-tolyl)- perpropionates via intermediates obtained by chloromethylation, malonic syntheses and decarboxylation is described. The intermediates substituted with a group possessing moderate substituent effect such as bromo, chloro, and methyl group were obtained in good yields. The nitro-substituted intermediat was obtained in poor yield. The chloromethylation of toluenes containing electron donating groups resulted in polymerization.
Electronic Spectra and Quenching of Dimethylanilines
Jung, Kyung-Hoon ; Lee, Ik-Choon ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 158~163
Electronic spectra and quenching constants for ten N,N-dimethylanilines (DMA) have been determined. The
absorption band (C band) of DMA was shown to be mainly responsible for the quenching. This band was confirmed as an
band through substituent and medium effects on the spectra shifts. The energy absorbed by this band then transfers to triplet and down to the lowest triplet state,
, where the energy is lost by non-radiative collisions.
Isolation of Histone-type Basic Proteins from Lemna paucicostata
Yoon, Joo-Ok ; Shin, Hong-Dae ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 164~168
We isolated histone-type basic proteins from lemna paucicostata for the first time. Basic proteins were extracted directly with dilute mineral acids from homogenized lemna paucicostata. Amino acid compositions of basic protein portions adsorbed on Amberlite CG-50(at pH 6. 0) were resembled to those of calf thymus histones. Especially, lysine content was the greatest of the other amino acids. By chromatographic studies, adsorbed portions of basic protein components on carboxymethyl cellulose column(at pH 4. 2) were shown to be homogeneous to calf thymus histones, however, the area under the individual curve was different, and furthermore, the containing of a non-adsorbed portion in the large extent was markedly different from calf thymus histones. And amino acid compositions of adsorbed portions represented the histone-type basic propertes, but non-adsorbed portions were considered as a different protein compared with the typical histone. When calf thymus histone and protein components separated from lemna paucicostata were heated(
) with a solution of
, precipitates were not obtained.
Mineralogical Studies on Korean Ceramic Raw Materials. I
Chi, Ung-Up ; Choi, Sang-Eul ; Lee, Ung-Sang ; Sang, Ki-Nam ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 169~178
Various ceramic raw minerals occuring in Korea were investigated laying emphasis on mineralogical identifications of them. Data of chemical analysis, differential thermal analysis, powder patterns of x-ray diffraction and particle size distribution were obtained for the present study. Hadong kaolin was confirmed as halloysite, and it was found that main constituent of some commercial pyrophyllite is mineralogically not pyrophyllite; Seongsan and Ockmaesan pyrophyllite consist of mainly kaolin group mineral, Tongnae pyrophyllite consists of muscovite, however Milyang and Jindo pyrophyllite is mineralogically pyrophyllite.
Significant Structure of Liquid Ammonia
Lee, Hai-Bang ; Jhon, Mu-Shik ; Chang, Sei-Hun ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 179~182
The partition function of liquid ammonia was developed by applying the modified significant structure theory of liquid.
The molar volume, vapor pressure, vaporization entropy were calculated over a wide temperature range. The critical properties for the liquid were also calculated. And surface tensions of the liquid were calculated in a similar manner developed for water by Chang and Pak.
The results show good agreement with experimental observations.
Statistical Thermodynamical Calculation of the Surface Entropy of Liquids
Park, Sung-Hye ; Pak, Hyung-Suk ; Chang, Sei-Hun ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 183~187
The excess molar surface entropies of each surface layers are calculated applying the modified significant structure theory of liquid. The calculated excess molar surface entropy for the first top surface layer is slightly greater than the entropy of surface formation of ideal molecules,
the latter is equal to Rln2. The excess entropy for the second surface layer is small and that for the third layer is negligible at low temperatures. The surface tensions of argon, nitrogen, methane, benzene and halogens are calculated applying the modified significant structure theory of liquid.
A New Gas-Chromatograghic Method of Organic Elemental Analysis
Kim, You-Sun ; Son, Youn-Soo ; Choi, Q.Won ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 188~191
A new gas-chromatographic method for determining carbon and hydrogen in organic compounds has been developed. After sample combustion was performed in a regular analytical combustion tube with an internal oxidant (a mixture of silver oxide and manganese dioxide) under a helium flow, the water produced was converted to acetylene by passing through a calcium carbide tube. The carbon dioxide and acetylene were trapped by a molecular sieve 5A column at room temperature. The trapped gases were released under programmed temperature raise up to
and the released gases were passed through a silica gel column. The adsorption of
in the molecular sieve 5A trapping column were found to be quantitative and the silica gel column showed an excellent resolution of
for analytical purpose. The analytical results for various known compounds based on the out-put of the thermal conductivity cell calibrated for the amounts of carbon and hydrogen contents in benzoic acid, showed average errors
for carbon and hydrogen, respectively.
Seasonal Variations of Chemical Composition of the Estuary Water at the Tidal Flat in Nack Dong River from Nov. 1962 to Oct. 1963
Won, Chong-Hun ;
Journal of the Korean Chemical Society, volume 8, issue 4, 1964, Pages 192~199
Seasonal variations of the contents of some chemical constituents of the estuary water at two definite stations of the laver bed in Nack Dong River have been determined over one tidal cycle in spring tide from Nov. 1962 to Oct. 1963. The ranges of annual variations of the contents at station 1 and station 2 are as follows: water temp.
; pH 7.8-8.5, 7.9-8.4; chlorosity 0.025-19.66 g/l, 4.31-19.56 g/l; magnesium 0.00355-1.565 g/l, -1.524 g/l; calcium 0.00557-0.482 g/l, - -0.590 g/l; saturation % of dissolved oxygen 71.8-123.2%, 88.2-113.8%; silicate-Si 8.00-125.5
g-at./l; phosphate-P 0.12-1.47
g-at./l; ammonia-N 4.88-25.45
g-at./l; nitrite-N 0.07-0.75
g-at./l; nitrate-N 2.11-6.89
g-at./l each. The annual tidal variations of the constituents at station 1 are more remarkable than of station 2. The chlorosity, magnesium and calcium contents are decreased nearing the slack after ebb, and increased abruptly then one hour after the slack. The contents of the other constituents are varied according to the chlorosity variety. The values of pH, chlorosity, magnesium and calcium contents are lower in summer than winter, while the difference of seasonal variations of the % saturation of dissolved oxygen is not remarkable. The phosphate-P and total nitrogen contents have a tendency of increasing within a definite range, while the silicate-Si increase proportionally, to the increasing of mixing percentage of fresh water. The average values of Si/P and N/P are several times greater than of the normal in sea water. The chemical composition considered from the value of Mg/Cl or Ca/Cl of estuarine water varies according to the variety of chlorosity, even at the high chlorosity of 19 g/l.