title: An effectiveness factor you can see. Experimental visualization of the effectiveness factor concept in a biological system.
abstract: Effectiveness factor values corresponding to carrageenan immobilized yeast beads packed in a continuous tubular fermenter are obtained from the mathematical modelization of the reactor performing ethanol fermentation. Simultaneously, microscopical direct observation of transversal sections corresponding to two different points in the fermenter is in good agreement with the calculated values: An effectiveness factor near to unity gives a uniform cell distribution in beads, as an effectiveness factor near to 0.75 corresponds to a non-uniform cell growth in beads. This observation gives a visual evidence of the validity of the approach used to treat diffusional limitations in biocatalytic particles.
authors.affiliation: Unitat d'Enginyeria Química, Universitat Autónoma de Barcelona, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Solà
authors.forename: C
authors.initials: C
authors.lastname: Casas
authors.forename: F
authors.initials: F
authors.lastname: Gòdia
mesh_terms: D001709:Biotechnology; D002351:Carrageenan; D002616:Chemical Engineering; D004058:Diffusion; D000431:Ethanol / Q000378:metabolism; D005285:Fermentation; D005782:Gels; D005947:Glucose / Q000378:metabolism; D007700:Kinetics; D008954:Models, Biological; D012441:Saccharomyces cerevisiae / Q000254:growth & development / Q000378:metabolism
chemical_list: D005782:Gels; D000431:Ethanol; D002351:Carrageenan; D005947:Glucose