http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
沃川系 黑鉛化 低質炭에서 우라늄과 바나듐의 回收에 關한 硏究
金演斗 충남대학교 자연과학연구소 1982 忠南科學硏究誌 Vol.9 No.2
The leaching process of uranium and vanadium from Ockcheon belt low grade graphitic coals was does on 0.6 mole sulfuric acid solution in the presence of ferrous sulfate. The separating process of uranium and vanadium in its leached solution was developed with Amberlite LA-2-Xylene solution after reduction on vanadium with sodium hydrogen sulfate. The yields of uranium and vanadium in this recovery process were evaluated to be 92% and 88% respectively for 24 hours.
朴鍾會,申大鉉,金演斗,尹錫丞,尹和重,申敏雄 충남대학교 기초과학연구소 1980 연구논문집 Vol.1 No.-
Dimerization constants for acridine orange and methylene blue in aqueous solutions have been determined by absorption spectroscopic method and also the empirical absorption curves of their monomeric and dimeric states are presented. The theories of hypochromism developed by Tinoco and Rhodes using first order perturbation theory and by DeVoe using a purely classical treatment have been modified and applied to the dimeric systems of the above compounds and the theoretical spectra of dimers are computed at various structure determining factors. By making comparison of the computed theoretical spectra with the empirical ones the configurations and the dimensions of the dimeric system of both compounds are determined, and the results are found to be reasonable, i.e., the intermolecular distance is 7.5Å and the angle of twist between the molecular planes is about 25°in both cases.
p-Methoxystyrylphenylsulfone의 가수분해 반응메카니즘에 대한 반응속도론적 연구
權奇星,高東成,朴文奎,金演斗,成洛道 충남대학교 기초과학연구소 1981 연구논문집 Vol.2 No.-
The rate constants for the hydrolysis of p-methoxystyrylphenylsulfone were determined at wide pH ranges by means of UV spectrophotometer and the rate equations which could be applied to the experimental results were obtained. Form the facts, reaction mechanism was proposed : above pH 11.5, the rate is only dependent on the concentration of hydroxide ion and below pH 9.5, the reaction is initiated by the attack of a water molecule on the activated carbon-carbon double bond. In the range of pH from 9.5 to 11.5, these two reactions occur competitively.