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${\alpha}$-아미노카프르산의 Micelle 형성을 위한 한계농도에 관하여
유지용,장세헌,Ryu, Ji-Yong,Chang, Sei-Hun 대한화학회 1966 대한화학회지 Vol.10 No.4
The critical concentrations of ${\alpha}$-amino capric acid for micelle formation have been determined by the surface tension measurements in both acidic and alkaline solutions, and also by the dye titration using Rhodamine B in alkaline solutions. The critical micelle concentrations obtained by the two methods show the good agreements within experimental errors. Since ${\alpha}$-amino acid is an ampholyte, it may aggregate to form the micelles in both more acidic and basic media than its isoelectric point. It is found that the basic media are rather preferable for the micelle formation than the acidic media. The effect of gegen ions upon the critical concentration for micelle formation in alkaline media is similar to that expected from the salt effect on the CMC (Critical Micelle Concentration).
Application of Transient State Theory of Significant Liquid Structure to Binary Mixtures
유지용,안운선,김각중,장세현,Ryu, Ji-Yong,Ahn, Woon-Sun,Kim, Kak-Choong,Chang, Sei-Hun Korean Chemical Society 1968 대한화학회지 Vol.12 No.1
이성분 용액에 대한 천이상태 이론의 적용 방법을 재고찰하여 이론적 보충을 하여주었으며, 이 새로운 방법에 따라서 $C_6H_{12}-CCl_4$계의 열역학적 성질들을 계산하였다. 또한 전의 방법에 따라서 계산된 $C_6H_6-C_6H_{12}$ 및 $C_6H_6-CCl_4$계의 열역학적 성질들도 재계산하였다. 이 방법에 따라서 계산된 열역학적 성질들을 측정치와 대단히 잘 맞는다.
유지용(Ji Yong Ryu),박지수(Ji Soo Park),박기봉(Ki Bong Park) 한국조리학회 2013 한국조리학회지 Vol.19 No.3
This study presented a theoretical research system about the impact of boss` transformational leadership that is recognized by super luxury hotel chefs on their job satisfaction and performance, and on the basis of this theoretical background, the model was derived and the hypothesis was confirmed by empirical research. A frequency analysis was conducted to determine the general characteristics of the 245 samples collected in this study, an exploratory factor analysis for the verification of the validity of boss` transformational leadership, employees` job satisfaction and job performance, and ``Cronbach`s a`` was used for the verification of reliability. In addition, a canonical correlation analysis was used to determine the relationship between transformational leadership, job satisfaction and job performance, and the influencing relations of variables were verified by running a multiple regression analysis through SPSS ver 18.0 statistical package in order to verify this research model and hypothesis. The results of this study can be summarized as follows: First, it was shown that the transformational leadership charisma (p<0.01) and only the individual concern (p<0.1) had a positive influence on job satisfaction. Second, as a result of understanding the impact of the transformational leadership on the job performance through a regression coefficient, it was shown that only boss` intellectual stimulation had an impact on the chef`s job performance (p<0.005). Through the results of an empirical analysis that boss` transformational leadership had a correlation and a significant impact on job satisfaction and job performance, the effort of providing the systematic support and motivational aspects of supporting environment will be needed.
Transient State Theory of Significant Liquid Structure Applied to Fused Salts
안운선,박형석,유지용,김각중,장세헌,Ahn, Woon-Sun,Pak, Hyung-Suk,Ryu, Ji-Yong,Kim, Kak-Choong,Chang, Sei-Heun Korean Chemical Society 1968 대한화학회지 Vol.12 No.4
액체구조의 천이상태 이론을 용융염에 확장시켜 액체없이 상태합을 유도하였다. 이 상태함을 액체할로겐화알칼리들에 적용시켜 증기압, 몰부피, 엔트로피등의 열역학적 성질을 계산한 결과 측정치와의 좋은 일치를 보여주었다.
긴장성 두통 환자에서 통증유발점 치료 및 제2 경추신경절 차단술의 효과
손지영,유지용,신동엽,홍기혁 인제대학교 1997 仁濟醫學 Vol.18 No.3
긴장성 두통의 원인은 여러 요인이 복잡하게 연계되어 병태를 형성하므로 단일 치료로 효과를 얻기가 어렵다. 인제대학교 상계백병원 신경통증 크리닉에서 치료한 긴장성 두통 환자 53명을 대상으로 통증유발점 치료 및 제2 경추신경절차단술에 대한 치료 효과를 분석한 결과, 44명(83%)의 환자에서 양호한 치료 효과를 보았기에 문헌적 고찰과 함께 보고하는 바이다. Objective: We studied the effect of trigger point injection and C2 ganglion blockade on patients with tension type headache. Methods: We studied 53 out-patients with tension type headache who visited the Department of Neuropain clinic, Sanggye Paik Hospital, Inje university. The diagnoses of tension type headache were based on the International Headache Society criteria. The response of type point injection and C2 ganglion blockade on patients was evaluated. For the patients who did not improve by more than 50% visual analog scale with trigger point injection, we have carried out C2 ganglion blockade. Results: 44 patients out of 53 improved(83%). In 2 patients C2 ganglion blockade led to pain relief. Conclusion : Trigger point injection and C2 ganglion blockade were effective on the patients with tension type headache.