publication . Article . 2010

Isolation and functional characterization of a biosurfactant produced by Lactobacillus paracasei.

LIGIA RODRIGUES; Eduardo Gudiña; José Teixeira;
Open Access English
  • Published: 01 Mar 2010
  • Publisher: Elsevier
  • Country: Portugal
In this study, the crude biosurfactant produced by a Lactobacillus paracasei strain isolated in a Portuguese dairy industry was characterized. The minimum surface tension (41.8mN/m) and the critical micelle concentration (2.5 mg/ml) obtained were found to be similar to the values previously reported for biosurfactants isolated from other lactobacilli. The biosurfactant was found to be stable to pH changes over a range from 6 to 10, being more effective at pH 7, and showed no loss of surface activity after incubation at 60 ◦C for 120 h. Although the biosurfactant chemical composition has not been determined yet, a fraction was isolated through acidic precipitatio...
free text keywords: Biosurfactant, Lactobacillus paracasei, Critical micelle concentration, Antimicrobial, Anti-adhesive, Autoaggregation, Science & Technology, Biotechnology, Physical and Theoretical Chemistry, Colloid and Surface Chemistry, Surfaces and Interfaces, General Medicine
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