Rhamnolipids Production by a Pseudomonas eruginosa LBI Mutant: Solutions and Homologs Characterization

Author(s)

Lovaglio, Roberta B. ^[1] ; da Silva, Vincius L. ^[1] ; Capelini, Tulio de Lucca ^[1] ; Eberlin, Marcos N. ^[2] ; Hausmann, Rudolf ^[3] ; Henkel, Marius ^[4] ; Contiero, Jonas ^[1]

Affiliation

^[1] Univ Estadual Paulista, Inst Biol Sci, Dept Biochem & Microbiol, BR-13506900 Rio Claro, SP - Brazil

^[2] Univ Estadual Campinas, Inst Chem, ThoMSon Mass Spectrometry Lab, Campinas, SP - Brazil

^[3] Univ Hohenheim, Inst Food Sci & Biotechnol 150, Sect Bioproc Engn 150k, D-70599 Stuttgart - Germany

^[4] KIT, Inst Proc Engn Life Sci, Sect Tech Biol 2, D-76131 Karlsruhe - Germany

• Document type: Journal article
• Source: TENSIDE SURFACTANTS DETERGENTS; v. 51, n. 5, p. 397-405, SEP 2014.
• Web of Science Citations: 5

Abstract

This paper evaluates the effect of additives (NaCl and ethanol) on the solution properties of rhamnolipids. The properties are the surface activity, aggregate formations and emulsifying activity as well as the synergistic effects of additives and pH variations on the physical properties of rhamnolipids. Additionally, analysis of fatty acids and rhamnolipid homologues produced using different carbon sources was performed by mass spectrometry. The results indicate that this biosurfactant maintain its properties in the presence of additives. NaCl decreases the size and number of aggregates formed in solutions without pH control, while ethanol to rhamnolipid solutions reduces critical micelle concentration and favors aggregation of monomers. The profiles of fatty acids produced by P. aeruginosa LBI 2A1 varied according to the carbon source used, however for rhamnolipids there was no difference. (AU)

• FAPESP's process: 07/03983-4 - Rhammnolipids Production by Pseudomonas aeruginosa LBI mutants
• Grantee: Roberta Barros Lovaglio
• Support type: Scholarships in Brazil - Doctorate