• KSBB Journal
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• 제15권4호
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• pp.393-397
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• 2000

The cometaboic biodegradation conditionso f trichloroethylene(TCE) by Burkholderia cepacia G4 were optimized using response surface analysis. The experimental sets of phenol concentration temperature and pH were designed using central composite experimental design. The optimal conditions of phenol concentration temperature and pH were determined to be 0.91 ppm 21.5$^{\circ}C$ and 7.65 respectively by the Ridge analysis of the contour plot for TCE biodegradation rates. The TCE biodegradation rate could be enhanced up to 2.43 nmol.mg protein$.$min by response surface methodology.

• 대한의용생체공학회:의공학회지
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• 제3권2호
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• pp.95-100
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• 1982

Glucose oxidase from A. niger was entrapped in polyacrylamide gel which was used in the enzyme electrode for glucose analysis. The electrode was assembled by placing the gel between the membranes on the surface of a Clark type electrode. In order to make it possible to analyze the experimental results later, the stagnation flow was adopted wheree the governing fluid mechanics were well known. The current increased with the increase concentration in the bulk below a certain level of glucose concentration beyond which no more current increase was observed. This is probably due to the diffusion limitation of oxygen from the bulk solution. Also the current increased witll the enzyme loading in the gel, but the linearity between the current and the glucose concentration was rather limited to a narrow range. Flow rate was found to be very important, which means that film diffusion is very important under the flow rate of 5cm/sec. As a conclusion, enzyme loading, gel layer thickness, stirring speed and bulk concentration of glucose were found to be most improtant parameters in yielding a linar current reponse with respect to the bulk glucose concentration.

• 지질공학
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• 제1권1호
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• pp.109-120
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• 1991

본고에서는 상시미동의 지질공학적 응용을 폭넓게 검토하는 한편 상시미동을 측정, 해석하여 상시미동의 탁월주기아 지하구조와의 관련성을 규명하였다. 상시미동의 응용예로서 확실히 구분이 가능한 지하구조를 가진 경상분지내 3지점에서 측정한 상시미동을 해석, 유추한 지하구조와 실제의 구조가 일치하는 사례를 소개하였다. 이와같은 상시미동의 장기간 측정 및 해석은 지하구조의 추정, 부지 고유의 응답 스펙트럼 작성, seismic microzonation 등에 경제적이고 효과적으로 이용할 수 있는 지질공학적 수단으로 사료된다.