title: Optimization of nutrients for gellan gum production by Sphingomonas paucimobilis ATCC-31461 in molasses based medium using response surface methodology.
abstract: A molasses based medium for the production of gellan by Sphingomonas paucimobilis ATCC-31461 was developed. Placket-Burman design criterion was applied to study the effect of various nutrient supplements on gellan production using molasses. Among the 20 variables tested, molasses, tryptone, casaminoacid, disodium hydrogen orthophosphate and manganese chloride showed significant effect on gellan production. A central composite design was applied to determine the optimum concentrations of the significant variables obtained from Placket-Burman design. Most suitable medium composition for production of gellan was (g/l): molasses-112.5; tryptone-1; casaminoacid-1; disodium hydrogen orthophosphate-1; manganese chloride-0.947 and the optimum gellan production was 13.814 g/l.
authors.affiliation: School of Biochemical Engineering, Institute of Technology, Banaras Hindu University, Varanasi 221 005, India. rmbanik@rediffmail.com
authors.forename: R M
authors.initials: RM
authors.lastname: Banik
authors.forename: A
authors.initials: A
authors.lastname: Santhiagu
authors.forename: S N
authors.initials: SN
authors.lastname: Upadhyay
mesh_terms: D003470:Culture Media; D008965:Molasses; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis*; D020578:Sphingomonas / Q000378:metabolism*
chemical_list: D003470:Culture Media; D011135:Polysaccharides, Bacterial; C048288:gellan gum