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Statistical experimental design optimization of rhamsan gum production by Sphingomonas sp. CGMCC 6833

  • Microbial Physiology and Biochemistry
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Abstract

Rhamsan gum is a type of water-soluble exopolysaccharide produced by species of Sphingomonas bacteria. The optimal fermentation medium for rhamsan gum production by Sphingomonas sp. CGMCC 6833 was explored definition. Single-factor experiments indicate that glucose, soybean meal, K2HPO4 and MnSO4 compose the optimal medium along with and initial pH 7.5. To discover ideal cultural conditions for rhamsan gum production in a shake flask culture, response surface methodology was employed, from which the following optimal ratio was derived: 5.38 g/L soybean meal, 5.71 g/L K2HPO4 and 0.32 g/L MnSO4. Under ideal fermentation rhamsan gum yield reached 19.58 g/L ± 1.23 g/L, 42.09% higher than that of the initial medium (13.78 g/L ± 1.38 g/L). Optimizing the fermentation medium results in enhanced rhamsan gum production.

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Xu, XY., Dong, SH., Li, S. et al. Statistical experimental design optimization of rhamsan gum production by Sphingomonas sp. CGMCC 6833. J Microbiol. 53, 272–278 (2015). https://doi.org/10.1007/s12275-015-3662-2

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  • DOI: https://doi.org/10.1007/s12275-015-3662-2

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