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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
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Volume & Issues
Volume 10, Issue 4 - Dec 1966
Volume 10, Issue 3 - Sep 1966
Volume 10, Issue 2 - Jun 1966
Volume 10, Issue 1 - Mar 1966
Selecting the target year
Reaction of Nitrous Acid on 5-Aminopyrimidines [III] Sandmeyer Reaction of Diazotizated 5-Amino-6-Methyluracil
Chang, Sae-Hee ; Hahn, Bo-Sup ; Kim, In-Kyu ; Oh, Sea-Hwa ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 51~53
A new conventional method for the preparation of 5-iodo, chloro-, and bromo-6-methyluracil by Sandmeyer reaction was described. According to this procedure, 5-halo-6-methyluracils have been prepared in high yields (up to 70%) without any difficulties to obtain highly pure products. No appreciable competing reaction was observed.
Aqueous oxidation of sulfide ore (part 1) Aqueous Oxidation of Marmatite in Ammonia Solution
Kim, Dong-Seon ; Chang, Tae-Seong ; Lee, Yong-Bok ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 54~58
By means of aqueous oxidation in ammonia solution, metallic zinc and sulfur in marmatite were leached. In this study, it was found that the concentration of ammonia was extremely influenced on the oxidation ratio of Zn and S, and the more the leaching temperature was low, the more their leaching ratio was decreased. The maximum leaching ratio to the contents in marmatite was obtained at the following conditions. Particle size 270 mesh above,
conc, 25%, Press. 4.2 kg/
, Time 20hrs. Leaching ratio; Zn 55% and S 50%.
Study on Sugar metabolism in Soybean Germination [I] (Isolation of Nucleotide Sugars)
Kim, Taik-Yung ; Shin, Hyun-Jae ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 59~61
Nucleotide galactose and glucose have been isolated during the soybean germination. Techniques for identification depends upon chromatography after elution the absorbed charcoal fraction with ethanol ammonia or 1/10N HCl.
The Effects for insecticide and synthesis of 5,6,8-trichloro-2,4-di-trichloro methyl benzo-1,3-dioxane
Lee, Dae-Soo ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 62~66
An insecticide was obtained from condensation of chloral hydrate with 2,4,5-trichloro phenol. The structure of the insecticide was found to be 5,6,8-trichloro 2,4-di-trichloro methyl benzo 1,3-dioxane. The best conditions of the condensation were as follows: 1) The sulfuric acid concentration;
. 2) The mole ratio of sulfuric acid to 2,4,5-trichloro phenol; 14.2. 3)The mole ratio of chloral hydrate to 2,4,5-trichloro phenol; 2.4. 4) The reaction time & reaction temperature;15hrs &
.The insecticidal effects of T. D. B against the Citrus Red Mite and Green Peach Aphid were the same of Mydran.
Fundamental Studies on Sinyewon Clays
Park, Soon-Za ; Ann, Nam-Soon ; Kim, Yoon-Ho ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 67~75
Four kinds of clays from Sinyewon mine which is located in Chungchoungnam-Do district and two kinds of Japanese clays (Gairome, Kibushi) were selected and studied on the fundamental properties of these clays and those which are refined by the elutriation method. Chemical analysis, grading analysis such as refractoriness, specific gravity, color, fired color and plasticity, particle size distribution, various thermal tests, X-ray diffraction analysis and electron microscopic survey were carried out on these clays. The comparison of domestic clays with Japanese clays was made. 1. In chemical composition and physical properties, these four kinds of Sinyewon clays are almost similar to each other and also to Gairome and Kibushi clays. In refractoriness, Gairome and Kibushi clays have relatively high value such as SK 34 and 35, while Sinyewon clays have the value of about SK 32. Especially Sinyewon clay B has the low refractoriness (SK 18) and plasticity. Refined clays have the tendency of somewhat higher value than crude ones in refractoriness. 2. When burnt up to
, the coefficients of contraction of Sinyewon clays were under 1.5%, Gairome under 1.3%, Kibushi under 3.0%. Only Sinyewon clay B showed expansion (1.0%) instead of contraction. 3. X-ray diffraction analysis and electron micrography showed that all of four Sinyewon clays and two Japanese clays are mainly composed of poorly crystallized kaolin, containing small amount of halloysite, sericite and considerable amount of quartz and feldspar. Sinyewon clay B contains especially large amount of quartz and feldspar. In general, it has been found out that the refined clays were free from large amount of iron oxide, quartz and feldspar.
A Study on Industrial Preparation Method of Ammonium Sulfate by Non-catalytic Oxidation
Chung, Ki-Yong ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 76~90
Ammonium sulfate synthesized by the air oxidation methods without catalyst using the reaction vessel which was fitted with fritted glass at the bottom of it and introducing, through the bottom, ammonia and air with constant flow rates to sulfurous acid solution of constant concentrations at the given temperatures. The experiment showed that the oxidation process was accelerated in accord with the increase of the air flow rates when the ammonia flow rate was constantly kept at ca. 100ml/min. in high temperatures. When the pH of the solution reached 9.0, the oxidation was nearly completed. It is assumed that in the process of reaction,
would be produced as an activated complex and the reaction was thought to be first order. The experiment indicated that the 0.5M sulfurous solution could be oxidized up to 98.54% at the flow rates of ammonia and air, 100ml/min., and 4l/min., respectively at
Transient State Theory of Significant Liquid Structure applied to Water
Pak, Hyung-Suk ; Chang, Sei-Hun ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 91~97
The partition function for liquid water is developed according to the transient state theory of significant liquid structure proposed by Pak, Ahn and Chang. This theory assumes that the molecules may possess solid-like, transient and gas-like degrees of freedom in liquid state. Although liquid water has several special properties, for example, minimum molar volume at
, the general theory of liquid can be applied successfully. The theoretically calculated values for thermodynamic properties at the liquid temperature range and for the critical properties are in good agreement with the observed values.
Spectrochemical Determination of Impurities in Rutile
Jae-Young Hwang ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 98~102
A spectrochemical method for the determination of the major impurities, such as aluminum, iron, magnesium and silicon, in rutile single crystals and variously doped rutile is presented. By applying higher current (12 amp) and a 1:2 sample-to-graphite dilution by weight, the elaborate sample preparation needed for conventional fusion technique was avoided, and relatively higher detection limits were established. Average deviations are approximately
for iron and magnesium in the concentration ranges of 0.007 to 0.7% and 0.006 to 0.6% respectively, and
for aluminum and silicon in the range of 0.005 to 0.5%.
Thermodynamic Parameters for Micelle Formation of Dodecylpyridinium Chloride
Han, Man-Un ;
Journal of the Korean Chemical Society, volume 10, issue 2, 1966, Pages 103~108
The effect of temperature on the critical micelle concentration of dodecylpyridinium chloride has been determined by electrical conductance method over the range from
. The values of the change in heat content,
, and the other thermodynamic parameters have been estimated using the equation of temperature dependence on the critical micelle concentration for the same temperature range. The significance of these thermodynamic quantities and their relations to the various current theories of micelle forming processes were discussed.