임상 가검물에서 분리된 균(대장균과 황색 포도균)의 약제 내성

김중명,김재식,김경선,김재룡,전동석,최성만,서상철,김인자,김재숭,이건일,김경숙 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2

1981년 1월에서 12월말까지 임상 제료에서 분리한 Escherichia coli (E. coli)와 Staphylococcus aureus (S. aureus) 중에서 무작위로 각 50주 씩 선택하여 원판 확산법과 평판 희섭법으로 그 내성주를 조사하여 다음과 같은 성적을 얻었다. 전체적으로 볼 때에 Teteracyclin (TET), Chloramphenicol (CM) 및 Ampicillin (AMP)에 대한 내성주가 가장 많았고, Amikacin (AMK)에 대한 내성주는 가장 적어다. 이것을 균종별로 보면 E. coli에 있어서는 TET, AMP 및 CM는 원판 확산법으로서 74∼76%, 평판 희석법으로서는 78∼94%가 내성주임을 나타내었고, 또 Cephalothin(CEP)은 원판 확산법에서는 8%가 내성주로 나타났으나, 평판 의석법에서는 52%가 내성주로 나타났다. S. aureus에 있어서는 TET는 원판 확산법으로 82%, 평판 희석법으로서는 78%가 내성주로 나왔고 Penicillin (P)은 원판 확산법에서는 56% 평판 희석법으로는 22%의 내성주가 나왔으며, GM과 CM은 원판확산법에서는 18∼44%, 평판 희석법에서는 56∼58%가 내성주로 나왔다. Each 50 strains of Escherichia coli and Staphylococcus aureus were selected at random out of the stock cultures which were isolated from the clinical materials in the bacteriological laboratory of the department of clinical pathology. Kyungpook National University Hospital from the first of January to the end of December in 1982, and their resistance against eight antibiotics were as follows; Escherichia coli and Staphylococcus aureus had the most resistant pattern against tetracyclin, chloramphenicol, and ampicillin, while they had the most sensitive pattern against amikacin in general. Escherichia coli revealed resistant pattern to tetracyclin, ampicillin, and chloramphenicol 74-76% by the disk diffusion method and 78-94% by the plate dilution method, and revealed resistant pattern to cephalothin 8% by the disk diffusion and 52% by the plate dilution. Staphylococcs aureus disclosed resistant pattern to tetracyclin 82% by the disk diffusion and 78% by the plate dilution, and disclosed resistant pattern to penicillin 56% by the disk diffusion and 22% by the plate dilution, and to gentamicin and-chloramphenicol 18-44% by the disk diffusion and 56-58% by the plate dilution.

Housing Investrnent in A Developing Country

Je-H∞n Lee 한국지역개발학회 2002 韓國地域開發學會誌 Vol.14 No.3

The main contribution by this paper is the addition of macroeconomics and political context to empirical analysis and interpretation of housing investment in Korea. First, 1 present a theoretical discussion to explain how investment in housing is determin, then a model of housing investment using time-series analysis. Regression models using time-series data from Korea covering the period of 1953-1993 are estimated to establish the empirical relationships. Results show that housin investment in Korea is statistically explained by levels of income, military spending, election, housing picy, foreign aÍÍ;rs, and global context of finance. These results are made more meaningful by adng intemationa1, domestic, and institutional variables to the context in which housing policy was formulated. The analysis also shows a statistically significant relationship between historical pattems of investment in housing sector and the structure of Koreas tota1 investment.

단일 충돌 분사법을 이용한 고속 전기도금 시스템의 반응특성 연구

朱宰伯,鄭在益 弘益大學校 科學技術硏究所 1997 科學技術硏究論文集 Vol.8 No.-

For an unsubmerged impinging slot-jet electroplating system, a theoretical model of the current and potential distribution was developed. It was found that hydrodynamic conditions exert a strong effect on performance at high current densities since flow influences mass transfer and also the shape of the free surface that confines the potential field. The capability of achieving selective reaction in the impingement region was found to improve with increased current density and flow rate. Dimensionless criteria for the upper limit of such improvements were established. Also the value of dimensionless parameters to represent the physical characteristics of the system gave significant effects for the determination of electroplating characteristics such as uniformity and selectivity of plating layer.

구리 미소 전극의 전기화학적 용해에 대한 과도기적 특성 변화의 이론적 해석

朱宰伯,鄭容錫 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.2

A transient behavior of a copper micro-band electrode dissolved electrochemically in hydrochloric acid has been solved by BIEM. The indirect method involving the Laplace transformation was used to analyze the system. The local current distribution becomes nonuniform when the dissolution time is proceeded. Especially the current density was increased sharply at the edge of electrode. It was found that the Tafel slope increased as the dissolution time was proceeded. Theoretical results shows that Tafel slope becomes constant value at steady state and the electrochemical dissolution behavior of copper in hydrochloric acid was mass transfer controlled.

유체가 흐르는 원통형 관내의 최적 전기도금을 위한 전류분포의 예측

朱宰伯,鄭在益 弘益大學校 科學技術硏究所 1996 科學技術硏究論文集 Vol.7 No.1

The methmatical model of the tertiary current distribution for the optimum conditions of electroplating inside a cylindrical tube with fluid flows, was stuied. With the assumption of fully developed flow, in the diffusion layer region the steady state equation of laminar convective diffusion was used, in the bulk region the Laplace's equation in cylindrical coordinates was used. The optimum condition of electroplating considered parameters that decide current distribution, was predicted.

정방 Cavity형 전극내 물질전달 분포의 이론적 예측

朱宰伯,李鎭宇 弘益大學校 科學基術硏究所 1999 科學技術硏究論文集 Vol.10 No.2

Prediction of mass transfer rates between the interior surface of small rectangular cavities and the solution glowing past the cavity opening, was investigated by theoretical method. The boundary integral method was used to calculate the viscous shear stress along the cavity surface under the assumption of Stokes flow for aspect ratios(width:depth) between 0.5:1 and 5:1. Based on the distribution of shear stress, the local mass transfer rate was calculated using the Lighthill integral method. The distribution of shear stress was symmetric because of its Stokes flow regime. However the distribution of local mass transfer rate was not symmetric and the largest mass transfer rate was occurred at the right corner of cavity. The mass transfer rate was proportional to the Re⅓ and this is in good agreement with experimental results previously known. The mass transfer rate increased with the increase of aspect ratio, but the method used in this study showed some errors when the aspect ratio exceeded the value of 3.

10Å Manganite와 δ-MnO_(2)의 부유성에 관한 연구

엄제현,김익수,성일용,김종윤,김진석 三陟大學校 2006 論文集 Vol.39 No.-

For the purpose of researching the floatability of 10Å Manganite and δ-MnO_(2) from Manganese layer, the test was performed by means of the Zeta potential measuring and the floatation experiment for 10Å Manganite, δ-MnOcc. The floatation condition in the floatation experiment were as follow. Sample : δ-MnO_(2), 10Å Manganite from Manganese layer Sample size : 65mesh ~ 200mesh. condition time : 10min. Flotation time : 4 min. Air amount : 20ml/min. Promoter : DACl, NaDS, Kerosene Dpresser : Na_(2)SiO_(2)(Water glass) PH regulator : HCl, CaO From the above test the floatation result were summerized as follow. 1) It was PH 2.3 that the PZC of the 10Å Manganite - rich from Manganese nodule in the ξ - potential measuring. 2) It was PH 3.0 that the PZC of the δ-MnO_(2)- rich from Mangnaese nodule in the ξ - potential measuring. 3) It was 35% using DACl 15mg/l at PH 2.7 that the most difference of floatability of the δ-MnO_(2)- rich and 10Å Manganite - rich.

기판내 홀의 전기도금 전류분포에 관한 이론적 연구

朱宰佰 弘益大學校 科學技術硏究所 2005 科學技術硏究論文集 Vol.16 No.-

A theoretical model was developed for the calculation of current distribution problems. The problem in this study is the electroplating through a hole in circuit board. We assumed that the flow pattern was tubular laminar flow through a hole. With use of commercial partial differential equation solver, The model equations was solved successfully. The results of secondary and tertiary current distribution problems showed that the value of applied potential or current was important to determine the uniformity of current distribution rather than the direction of fluid flow.

Todorokite와 δ-MnO₂의 浮遊性에 關한 硏究

엄제현,김익수,성일용,김종윤,김진석 三陟大學校 産業科學技術硏究所 2004 産業科學技術硏究論文集 Vol.9 No.1

For the purpose of reserching the floatability of Manganese-nodule, the test was porformed by means of the Zeta potential measuring and the flotation experiment for Todorokite, δ-MnO₂ The flotation condition in the flotation experiment were as follow. sample : Todorokite, δ-MnO₂ sample size : 65 mesh - 200 mesh condition time : 10 min flotation time : 4 min air amount : 20 ㎖/min promoter : D.A.Cl, S.D.S pH regulator : HCl, CaO From the above test the flotation result were summerized as follow. 1. The point of zero charge(PZC) of Todorokite in the Zeta potential measuring was pH4.3. 2. The point of zero charge of δ-MnO₂ in the Zeta potential measuring was pH3.0. 3. The best floatability of 8 δ-MnO₂ was 85% as a function of pH3.5 using DACl 10㎎/ℓ 4. The best floatability of Todorokite was 40% as a function of pH3.5 using DACl 10㎎/ℓ 5. The most difference of floatability of the δ -MnO₂ and Todorokite was 40% using DACl 10m㎎/ℓ at pH3.5

우리 나라의 合理的 地方財政調整制度에 관한 연구

金濟安 조선대학교 경영경제연구소 1999 經營經濟硏究 = Management and economics research Vol.22 No.2