Penicillin is produced by P. chrysogenum in a fed-batch culture with the intermittent addition of glucose solution to the culture medium. The initial culture volume at quasi-steady state is V0 = 500 l, and glucose-containing nutrient solution is added with a flow rate of F = 50 l/h. Glucose concentration in the feed solution and initial cell concentration are S0 = 300 g/l and X0 = 20 g/l, respectively. The kinetic and yield coefficients of the organism are mm = 0.2 h-1 , KS = 0.5 g/l, and YX/S = 0.3 g dw/g glucose. Determine the concentration of cells at quasi-steady state when t = 10 h.

TLS Online TPP Program

#Question id: 21380

#Section 5: Bioprocess Engineering and Process Biotechnology

Sum of the powers of the concentration terms in the rate equation is called the __________ of the reaction.

TLS Online TPP Program

#Question id: 21391

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Which one of the following biosensors is also known as a piezoelectric device?

TLS Online TPP Program

#Question id: 21726

#Section 5: Bioprocess Engineering and Process Biotechnology

For a first order chemical reaction, the rate constant

TLS Online TPP Program

#Question id: 21727

#Section 5: Bioprocess Engineering and Process Biotechnology

In the reaction H2O2(aq) → H2O(l) + ½ O2(g), the initial concentration of H2O2 is 0.2546 M, and the initial rate of reaction is 9.32×10^–4 M s^–1. What will be [H2O2] at t = 35 s?

TLS Online TPP Program

#Question id: 21728

#Section 5: Bioprocess Engineering and Process Biotechnology

In the reaction A → products, we find that when [A] has fallen to half of its initial value, the reaction proceeds at the same rate as its initial rate. Is the reaction zero order, first order, or second order?

TLS Online TPP Program

#Question id: 21729

#Section 5: Bioprocess Engineering and Process Biotechnology

In the reaction, A → products, with the initial concentration [A]0 = 1.512 M, [A] is found to be 1.496 M at t = 30 s. With the initial concentration [A]0 = 2.584 M, [A] is found to be 2.552 M at t = 1 min. What is the order of this reaction?