Respirometry kinetics of phenol oxidation by Comamonas testosteroni Pb50 under various conditions of nutritional stress
AUTOR(ES)
Paca, Jan, Kosteckova, Alena, Pacova, Leona, Prell, Ales, Halecky, Martin, Paca Jr., Jan, Stiborova, Marie, Kozliak, Evguenii, Soccol, Carlos Ricardo
FONTE
Brazilian Archives of Biology and Technology
DATA DE PUBLICAÇÃO
2010-12
RESUMO
Kinetics of phenol biodegradation using suspended biomass of Comamonas testosteroni Pb50 (monoculture) was measured under conditions of nutrient abundance, limitation, and prolonged cell starvation in a fed-batch reactor, with phenol being the sole carbon and energy source. The pre-washed cells were applied for measurement of the phenol and oxygen uptake rates at varied starting phenol concentrations with the kinetic parameters calculated using the Haldane model. The results revealed that nutrient limitation significantly suppressed the maximum value of exogenous respiration rate while the endogenous respiration rate, affinity and tolerance to phenol increased. By contrast, cell starvation resulted in a drop of both the exogenous and endogenous respiration rates by an order of magnitude.
Documentos Relacionados
- PhcS Represses Gratuitous Expression of Phenol-Metabolizing Enzymes in Comamonas testosteroni R5
- Uptake of 4-toluene sulfonate by Comamonas testosteroni T-2.
- Alteration in the Amino Acid Content of Yeast During Growth Under Various Nutritional Conditions
- INHIBITION KINETICS DURING THE OXIDATION OF BINARY MIXTURES OF PHENOL WITH CATECHOL, RESORCINOL AND HYDROQUINONE BY PHENOL ACCLIMATED ACTIVATED SLUDGE
- Resveratrol may protect plasma proteins from oxidation under conditions of oxidative stress in vitro