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연속 2 단계 교반조 효소 반응장치의 최적화에 관한 연구
박영훈,유두영 한국화학공학회 1978 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.16 No.4
For production of 6-aminopenicillanic acid by enzymatic hydrolysis of benzylpenicillin, two-stage continuous stirred tank enzyme reactor system was evaluated. Using proper mathematical model of the reaction kinetics and kinetic constants of soluble and immobilized forms of penicillin amidohydrolase, the reactor system was simulated with an aid of a computer and a set of optimum operating conditions was found. In comparison with the single stage system, the productivity of the two-stage enzyme reactor system was 50% higher than that of the single stage system under the same operating conditions. For the industrial applications, the reactor system using immobilized penicillin amidohydrolase was found to be far more advantageous in terms of productivity than that using soluble enzyme because of the reduced inhibitory effect of the product, 6-aminopenicillanic acid, on the immobilized enzyme as compared to the same effect on the soluble enzyme.
Approximate Analysis Method for Composite Beams with Partial Interaction Using Fourier Series
박영훈,김성훈,이승용,최준혁 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.2
This paper presents an alternate analysis method for calculating the deflection and internal forces for arbitrary boundary and loading conditions of composite beams with partial interaction. The internal axial force was approximated by the Fourier series to solve the governing equation of composite beam. Then, the coefficients of the Fourier series were determined using the Euler-Lagrange equation of minimizing a definite integral. An evaluation of the convergence and the accuracy for the proposed method in the determination of the deflection for four types of boundary conditions with four types of loading cases was made. The results were agreed with those obtained by other analytical methods. The displacement of the partial composite beam depends on the stiffness of shear connectors, boundary conditions and loading conditions.