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.

우리나라 地方政府의 地方財政 擴充을 위한 方案

金濟安 조선대학교 경영경제연구소 1996 經營經濟硏究 = Management and economics research Vol.19 No.2

졸겔법에 의해 제조된 결정질 LiMn₂O₄의 전기화학적 반응 특성연구

朱宰伯,曺星美 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

Lithium secondary batteries is expected to be highlighted as the future mobile electric power source since it is more outstanding in energy density and many other properties compared with the existing secondary batteries. Among the cathode materials of lithium secondary battery, LiMn₂O₄ consists of spinel structure and shows the highest level of operative voltage. The citric acid method, one of the moisture present methods, is easy to control the composition rate and gets less amount of inflow impurities and even the grain size is adjustable in microscopic level so that possibly obtains the sample powder with large surface area and evenly distributed grains, subsequently a lot of research proceeded so far. The initial discharge capacity was 110Ah/g which is corresponding to 74.2% of the theoretical capacity of LiMn₂O₄, 148.21mAh/g. After 20 cycle, it showed 92mAh/g and after 30 cycle, it became 75mAh/g that is a large capacity fading of 31.8%.

Micromanganese-Nodule의 選鑛에 관한 硏究(제1보)

엄제현,박동기,김익수,성일용,김종윤,김진석 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.4

For the purpose of researching of the manganese recovery from the micromanganese-nodule, the test was performed by means of the ζ-potential measuring and of the floatation experiment for manganese recovery of the micromanganese nodule obtained from siliceous deep sea clay. The floatation condition in the floatation experiment were as follow. Sample size : 65mesh∼200mesh. Condition time : 10 min. Flotation time : 4 min. Air amount : 20㎖/min. Promoter : DAS, NaDS. Kerosene Dpresser : Na_2SiO_3(Water glass) PH regulator : HCl, CaO From the above test the flotation results were summerized as follow. (1) ζ-potential of micromanganese-nodule was minus(-) in the pH 3∼12. (2) The manganese recovery from the micromanganese- nodule was the best at pH 7. (3) The manganese recovery from the micromanganese- nodule was the best using DACI 50㎎/ℓ + kerosene 200㎎/ℓ in the promoter at pH 7. (4) The best manganese recoverv of the micromanganese-nodule was 80% using DACI 50㎎/ℓ + kerosene 200㎎/ℓ in the promoter and water glass 500㎎/ℓ in the depresser at pH 7. In the futurity, continuous study of the micromanganese-nodule in many kinds of site should be required.

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

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.

음성인식을 이용한 컴퓨터 게임의 구현에 관한 연구

윤재선,최광표,이두성,홍광석 成均館大學校 科學技術硏究所 1999 論文集 Vol.50 No.1

In this paper, we present a speech recognition game, "Voice Illust Magic". "Voice Illust Magic" is on-line windows game using speech recognition algorithm HMM. Because this game can be performed by not only the mouse and keyboard but also speech recognition, the users can use the computer easily. The speech recognition process of computer games detects the endpoint of input speech automatically which is received through the microphone and then extracts the feature parameter, Mel cepstrum. The VQ sequences of input speech are compared with the reference models of word unit and the optimal model is selected among reference HMMs. The puzzle games transfer the message of the recognized game command which performs the same operation as the keyboard and mouse into the windows interface. Since input speech is not compared with all reference patterns but the reference patterns of each state, this method can reduce the recognition time and can improve the recognition rate.

코발트 회전전극을 이용한 부식 반응 기구 및 산소의 영향에 관한 고찰

朱宰伯 弘益大學校 科學技術硏究所 1994 科學技術硏究論文集 Vol.5 No.-

Electrochemical dissolution behavior of cobalt in sulfate solutions was investigated. Tafel kinetic behavior of cobalt dissolution and hydrogen reduction were measured in acid and alkaline solutions containing sulfate ions at several pH values. Rotating disc electrode was used in order to eliminate the mass transport limitations at the electrode surface. The increase of pH resulted the shift of corrosion potential and the decrease of corrosion current. Also the kinetic mechanism of cobalt dissolution in acid solution was examined. The effect of dissolved oxygen in acidic solution on the corrosion and electrodissolution of cobalt and the oxygen reduction on cobalt were studied with rotating disc electrode. The increase of dissolved oxygen concentration enhanced the corrosion current. The number of electrons consumed in the oxygen reduction process was determined as about 2 in hydrochloric acid and about 4 in sulfuric acid. This indicates that the primary product is hydrogen peroxide in chloride solution and water in sulfate solution in the process of oxygen reduction.

염소이온이 코발트의 부식반응에 미치는 영향

朱宰伯,李政峻 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

Electrochmical dissolution behavior of cobalt in chloride solution was investigated. Kinetic data of cobalt dissolution and hydrogen reduction were measured in acid and alkaline solutions containing chloride ions at several pH values. Rotating disc electrode was used in order to eliminate the mass transport limitations at the electrode surface. The effect of pH on the corrosion potential and corrosion current were observed. Also the kinetic mechanism of cobalt dissolution in acid solution was examined. It was found that the dissolution behavior in chloride solution is quite different from that in sulfate solution.