Campbell W. Robinson

Bio: Campbell W. Robinson is an academic researcher from University of Waterloo. The author has contributed to research in topics: Pseudomonas putida & Bubble. The author has an hindex of 30, co-authored 70 publications receiving 3307 citations.

Substrate inhibition kinetics: Phenol degradation by Pseudomonas putida

Abstract: A pure culture of Pseudoinonas putida was grown in both a batch and continuous culture using phenol as the limiting substrate. Of two substrate inhibition models examined, the Haldane function was found to statistically best describe the kinetics. The applicable kinetic constants were either measured (μM, KI) or estimated (KS) from the experimental data. Particularly in the continuous culture, wall growth was found to exert significant effects on the broth biomass concentration and phenol conversion, both of which decreased with increasing amounts of wall growth. These effects are opposite to those predicted by wall growth models and to experimental results of others using mixed culture (activated sludge) systems.

Review: optimizing inducer and culture conditions for expression of foreign proteins under the control of the lac promoter.

Abstract: This review examines factors which influence the expression of foreign proteins inEscherichia coli under the transcriptional control of thelac andtac promoters, and discusses conditions for maximizing the production of a foreign protein using this system. Specifically, the influence of IPTG (isopropyl-β-d-thiogalactoside) concentration, temperature, composition of the growth medium, the point in the growth curve at which cells are induced with either IPTG or lactose, and the duration of the induction phase are discussed.

Gas holdup and overall volumetric oxygen transfer coefficient in airlift contactors

Abstract: The two major types of airlift contactors, concentric-tube and external-loop, were investigated for their gas holdup (riser and downcomer) and overall mass transfer characteristics. Results obtained in batch charges of tap water and 0.15 kmol/m(3) NaCl solution are reported for external-loop airlift contactors having downcomer-to-riser cross-sectional area ratios, A(d)/A(r), ranging from 0.11

Liquid circulation and mixing characteristics of airlift contactors

Abstract: Etude experimentale de quatre contacteurs a boucle externe, dont le rapport des sections du trop plein et du tube de montee se situe dans le domaine 0,11≤A d /A r ≤0,69 et de trois contacteurs a tubes concentriques, ce rapport se situant dans la gamme 0,13≤A d /A r ≤0,56. Resultats concernant la vitesse du liquide dans la colonne de montee, le nombre de Bodenstein de la phase liquide et le temps de melange

Kinetic models of sorption: a theoretical analysis.

Abstract: The kinetics of sorption from a solution onto an adsorbent has been explored theoretically. The general analytical solution was obtained for two cases. It has been shown that at high initial concentration of solute (sorbate) the general equation converts to a pseudo-first-order model and at lower initial concentration of solute it converts to a pseudo-second-order model. In other words, the sorption process obeys pseudo-first-order kinetics at high initial concentration of solute, while it obeys pseudo-second-order kinetics model at lower initial concentration of solute. The theoretical results (derived equations) show that the observed rate constants of pseudo-first-order and pseudo-second-order models are combinations of adsorption and desorption rate constants and also initial concentration of solute. The obtained theoretical equations are used to correlate experimental data for sorption kinetics of some solutes on various sorbents. The predictions of the theory are in excellent agreement with the experimental data.