Simulation of bioconversion process was done at a constant value of substrate concentration according to the reaction mechanism.
In addition these curves has the value of substrate flux into biofilm (J) in implicit form, so many steps has been saved in evaluating this value, which is required in any analytical solution (Fouad and Renu 2005c).
Only knowledge of hydraulic retention time (HRT), influent substrate concentration (So), stagnant liquid layer thickness (L), the minimum substrate concentration which can maintain the biofilm growth (Smin), and the desired value of substrate concentration in the bulk (S) permit computation of suspended biomass concentration (X) and food to biomass ratio (F/M) for that system.
The findings suggest that there is a critical value of substrate resistivity (approximately 0.1 to 0.2 Ω-cm) below which no macropore is obtained for our samples and these observations are in agreement with those reported by Harraz et al. [16].
The t = 0 value of substrate fraction CS is 5%% [eqn (11), defining MCS(t = 0) in terms of MCX(t = 0)].
In other words, current value of substrate feed rate was equal to exponentially increasing set point of substrate feed rate till the moment when current value of controlling parameter (DOCV) was passed through the DO set point (DOSP).
The high value of substrate inhibition constant Ki = 156.6 mg l−1 shows a great resistance of Pseudomonas sp. E-93486 to inhibitory activity of styrene, which is noticeable only at concentrations higher than 30 mg l−1.
(a) Dissociation constants (K d values) of substrates (lauric acid, myristic acid, and palmitic acid) to CYP102A1 natural variants.
The K d values of substrates to the CYP102A1 variants were determined (at 23°C) by titrating 2.0 μM enzyme with the ligand, in a total volume of 1.0 ml of 100 mM potassium phosphate buffer (pH 7.4).
For the determination of the Km values of substrates, the concentrations of kaempferol and quercetin were varied from 20 to 100 μM, at a fixed UDP-glucose concentration of 2.5 mM and 7.0 μg of the purified enzyme.
Different values of substrate bias are employed.
