Factors affecting rhamnolipids production by Pseudomonas aeruginosa LBI
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Data
2008-02-01
Autores
Henning, Silva Barbara
Paula Santos, Pirollo Maria
Lovaglio, Roberta
Costa, Siddhartha G. V. A. O.
Contiero, Jonas [UNESP]
Loshchagin, Pizzolitto Elisabeth [UNESP]
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Título de Volume
Editor
Research Journal Biotechnology
Resumo
This paper presents the results from study investigating the capacity of Pseudomonas aeruginosa LBI growing on several carbon (Hydrophilic substrate) and nitrogen sources. The carbon source (2016) studied were: glycerol, manitol, fructose, glucose, lactose and the nitrogen sources (2; 3; 4 and 5016) were: NaNO3, NH4NO3, (NH4)(2)SO4 and (NH2)(2)CO. At the 96 h of fermentation, the medium with glycerol as a carbon source reached 7.9 g/L of rhamnolipids and 1. 2 g/L cellular protein. The surface tension reduction was 38.46 % for glycerol as a carbon source. The NaNO3 at 3% was the best concentration for rhamnolipids production (7.35 g/L) and cellular protein (1.12 g/L). The influences of metal ions [FeSO4.7H(2)O (0.001g/L, 0.005 g/L and 0.1 g/L) and MgSO4.7H(2)O (0.001 g/L, 0.005 g/L and 0.1 g/L)] on ramnolipids production were studied. Fe2+ had a negative influence on the studied concentrations while Mg2+ had a positive influence when its concentration was increased.
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Pseudomonas aeruginosa, rhamnolipid, carbon source, nitrogen source, metal ions
Como citar
Research Journal of Biotechnology. Indore: Research Journal Biotechnology, v. 3, n. 1, p. 45-49, 2008.