Effect of external pH on acidification and excretion of ethanol intermediates by Candida utilis.
External pH affects the acidification induced by ethanol. The apparent specific rate of acidification depends on the dissociation properties and production of carbon dioxide, acetic and lactic acid which are intermediates of ethanol oxidation. The organic acids are transported by Nernst-Einstein diffusion. We designed and identified a new and simple mathematical model that allows us to describe the effect of external pH on nonstationary transport of dissociated intermediates of ethanol oxidation.
Páca
J
J
Department of Fermentation Chemistry and Bioengineering, Institute of Chemical Technology, Prague.
Votruba
J
J
D000085:Acetates / Q000378:metabolism; D019342:Acetic Acid; D001693:Biological Transport, Active; D002175:Candida / Q000378:metabolism*; D002245:Carbon Dioxide / Q000378:metabolism; D000431:Ethanol / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D007773:Lactates / Q000378:metabolism; D019344:Lactic Acid; D008954:Models, Biological; D010084:Oxidation-Reduction; D011188:Potassium / Q000378:metabolism
D000085:Acetates; D007773:Lactates; D002245:Carbon Dioxide; D019344:Lactic Acid; D000431:Ethanol; D019342:Acetic Acid; D011188:Potassium