Exopolysaccharide Production by Pseudomonas NCIB11264 Grown in Continuous Culture

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Abstract
Exopolysaccharide formation by Pseudomonas NCIBII264 in a single-stage continuous culture was maximal under nitrogen limitation with excess carbohydrate substrate at 30 ± I °C and pH 7.0 ± 0.1. Polysaccharide production was not enhanced by phosphate limitation but was dependent on the dilution rate. Steady states were maintained for up to 500 h without deterioration of the culture or the development of mutant strains. The efficiency of conversion of the glucose substrate utilized into exopolysaccharide by the chemostat cultures was as high as 73%.

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