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Research Article
 

Lipopolysaccharide Extracellular Emulsifier Produced by Penicillium citrinum



M.M. Camargo de Morais , S.A.F. Ramos , M.C.B. Pimentel , E.H.M. Melo , M.A. Morais Jr , J.F. Kennedy and J.L. Lima Filho
 
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ABSTRACT

A Brazilian strain of Penicillium citrinum produced a lipopolysaccharide with emulsifier properties during cultivation on mineral medium, containing ammonium sulfate as nitrogen source, with 1% (v/v) olive oil as the carbon source. The maximal emulsifier production (1.6 U mL-1) was obtained after 60 h of cultivation and the biomass reached 7.5 g L-1 at the end of fermentation. The production yield i.e. the amount the carbon source utilized for product synthesis was 54% and the best emulsifying activity was observed for xylene and diesel oil when compared to other carbohydrates tested. The emulsifier was shown to be stable to a wide range of pH and temperature values and was shown to contain D-galactose, D-glucose and D-xylose (8.2:1.0:5.3) with a total carbohydrate content of 43%. The presence of salts stimulated the emulsification activity, suggesting potential for its application in industrial waste or marine remediation.

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  How to cite this article:

M.M. Camargo de Morais , S.A.F. Ramos , M.C.B. Pimentel , E.H.M. Melo , M.A. Morais Jr , J.F. Kennedy and J.L. Lima Filho , 2006. Lipopolysaccharide Extracellular Emulsifier Produced by Penicillium citrinum. Journal of Biological Sciences, 6: 511-515.

DOI: 10.3923/jbs.2006.511.515

URL: https://scialert.net/abstract/?doi=jbs.2006.511.515

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