title: Three-factor response surface optimization of the production of dextran dextrinase by Gluconobacter oxydans.
abstract: Response surface methodology (RSM) and a five-level three-factor central composite rotatable design (CCRD) were used to evaluate the effect of glycerol and peptone concentration and initial pH on dextran dextrinase (DDase) production by Gluconobacter oxydans. Optimal fermentation conditions were 20.59 g/l of glycerol, 6.67 g/l of mycological peptone and an initial pH of 6.14. The predicted DDase yield of the optimised fermentation was 0.207 U/ml, whereas an actual experimental yield of 0.208 +/- 0.025 U/ml was obtained.
authors.affiliation: Department of biochemical and microbial technology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
authors.forename: M
authors.initials: M
authors.lastname: Naessens
authors.forename: R
authors.initials: R
authors.lastname: Vercauteren
authors.forename: E J
authors.initials: EJ
authors.lastname: Vandamme
mesh_terms: D005285:Fermentation; D020600:Gluconobacter oxydans / Q000201:enzymology*; D005964:Glucosyltransferases / Q000096:biosynthesis / Q000378:metabolism*; D005990:Glycerol / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D007700:Kinetics
chemical_list: D005964:Glucosyltransferases; C402863:dextrin dextranase; D005990:Glycerol