TY - JOUR
T1 - Rhamnolipids production by a pseudomonas eruginosa LBI mutant
T2 - Solutions and homologs characterization
AU - Lovaglio, Roberta B.
AU - Da Silva, Vinícius L.
AU - De Lucca Capelini, Tulio
AU - Eberlin, Marcos N.
AU - Hausmann, Rudolf
AU - Henkel, Marius
AU - Contiero, Jonas
N1 - Publisher Copyright:
© Carl Hanser Verlag GmbH & Co. KG.
PY - 2014/9/1
Y1 - 2014/9/1
N2 - 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.
AB - 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.
KW - Biosurfactant
KW - Critical micelle concentration (CMC)
KW - Physical properties
KW - Pseudomonas aeruginosa LBI mutant
KW - Rhamnolipids
UR - http://www.scopus.com/inward/record.url?scp=84908461360&partnerID=8YFLogxK
U2 - 10.3139/113.110321
DO - 10.3139/113.110321
M3 - Article
AN - SCOPUS:84908461360
SN - 0932-3414
VL - 51
SP - 397
EP - 405
JO - Tenside, Surfactants, Detergents
JF - Tenside, Surfactants, Detergents
IS - 5
ER -