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비양성자성 용매에서 2-tert-Butylcyclohexanone tosylhydrazone의 열분해 반응
郭永佑 慶北大學校 1989 論文集 Vol.47 No.-
In aprotic media tosylhydrazone compound thermally decomposes with loss of nitrogen giving carbene. Decomposition of 2-tert-butylcyclohexanone tosylhydrazone in the presence of N-methylpyrrolidone and sodium methoxide led to a mixture of hydrocarbon products, which are descerned via gas chromatograph on a methyl phenyl silicone column. The observed products, 1-tert-butylcyclohexene and 3-tert-butylcyclohexene, were identified by spectroscopic mithods. The product ratio indicated the approximate order of migration for hydrogen.
郭永佑 慶北大學校 1991 論文集 Vol.51 No.-
From the thermal gas phase reaction of methylhydridosialcyclobutane with butadiene we could calculate the activation energy of isomerization from methylsilene to dimethylsilylene. The value of activation energy for this isomerization was 28-33 kcal/mol.
곽중민,박서영,이우식,강인석 慶尙大學校 1999 論文集 Vol.38 No.-
The computerization is an important factor for scientific construction management. Con-struction management softwares are being widely used for computerizing project control and scheduling. The code systems in those softwares enable various classifications of con-struction information such as filtering, sorting and grouping, and facilitate easy appli-cation of computer system. This study analyzes the code systems of three softwares, which are representatively used in the construction sites, through a comparative analysis for the applicability in construction management. Finally the study suggests a desirable structure of code system and a selection criterion of software to improve the applicability of construction management softwares in the construction sites.
Staphylococcus epidermidis에 의한 자연판막 심내막염 1례
송화영,곽이경,김민,조종래,엄태현,장우익 대한감염학회 2009 감염과 화학요법 Vol.41 No.5
Although Staphylococcus epidermidis is a frequent cause of prosthetic valve endocarditis (PVE), it is regarded as a rare pathogen of native valve endocarditis (NVE). We report a case of NVE caused by methicillin-resistant S. epidermidis in a 62-year-old man. The bacterium was isolated from blood and tissue culture. The patient underwent valve replacement due to heart failure and was successfully treated by surgery and vancomycin administration for 7 weeks.
아세톤 溶媒속에서 N,N^´-디메칠아닐린의 벤조일레이숀 親核置換反應에 관한 연구
呂壽東,郭永佑 慶北大學校 1975 論文集 Vol.20 No.-
The rate of the reaction of N, N'-dimethylaniline with various substituted benzoylchlorides has been measured by using spectrophotometer in acetone at 580㎚ and three different temperatures. The reaction was second order overall and pseudo first order with respect to each reactant. The rate constants were increased by electron-donating substituents, while they were decreased by electron-withdrawing groups. However, reaction of p-bromo and p-chloro benzoylchloride with N, N'-dimethylaniline had an abnormality in comparison with m-nitro and p-nitro benzoylchloride. Kinetic investigation carried out on this reaction showed that C-Cl bond breaking reaction predominates in the case of electron-releasing substituent but C-C bond making reaction becomes increasingly in the case of electron-withdrawing substituent. Activation parameters for the benzoylation were calculated.
김승수,곽병곤,김영대,김우경,김영균,이종국 白中央醫療院 2005 仁濟醫學 Vol.26 No.1
Objectives: The aim of this study was to describe the clinical characteristics of enuretic children and to evaluate the efficacy of treatments. Methods: Our study subjects enrolled were 52 children with nocturnal enuresis, who visited outpatient clinic of pediatrics in Seoul Paik Hospital and Ilsan Paik Hospital, during the period from October 1998 to August 2004. The data of gender, age, family history, symptom, clinical type of enuresis and drug therapy were collected and analyzed retrospectively. Results: The male : female ratio was 2.25 : 1. The mean age at diagnosis was 6.8 years with an age range from 4.3 years to 12.5 years. Fourty five cases(86.5%) were diagnosed as primary enuresis and 7 cases(13.5%) were diagnosed as secondary enuresis. A family history of enuresis was noted in 5 cases(9.6%) including 4 cases with parental enuresis history. The accompanying urinary symptoms were urgency(11.5%), frequency (7.7%), and dysuria(2.0%). Conclusion: We found frequent occurrences of enuresis in boys and primary type and an occasional association with a family history of enuresis. The two main treatment modalities were behavior control with an alarm system and drug therapy with imipramine, desmopressin, or oxybutynin. We recommend continuous drug medications to control nocturnal enuresis along with encouragement.
물-메타놀 混合 溶媒에서 Pb-Acetate의 熱力學的 性質에 關한 硏究
朴裕哲,吳相午,郭永右 慶北大學校 1973 論文集 Vol.17 No.-
Activity coefficients and solubility products of Pb-Acetate(10^(-1)∼10^(-4) mole/l) from aqueous solution to the solution of water-methanol mixtures are investigated by electromotive force measurements at 25℃. The effect of dielectric constant of various solvents on these physical constants have been considered on quantitative basis. We are suggested that the relationship between the meen activity coefficients(r^*_±) and solubility products(k^*_s) in a reference solvent and those in other solvents is represented as follows; logr^s_±=logr^*_±+n, where n is -logr^*_s/k^s_s. Futher, we estimated the difference of the free energy change of transfer of Pb-Acetate from aqueous solution to the solution of water-methanol mixtures and the ion-size parameter of Pb-Acetate. The values of the ion-size parameter varies from 3.8Å to 4.4Å. Considering the free energy change, it is possicle to assume that the salt in the solvent of higher dielectric constant may be dissolved by electrostatic force rather than non-electrostatic force.