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Production of Pseudomonas aeruginosa LBI rhamnolipids following growth on Brazilian native oils

Paper ID Volume ID Publish Year Pages File Format Full-Text
36186 45123 2006 6 PDF Available
Title
Production of Pseudomonas aeruginosa LBI rhamnolipids following growth on Brazilian native oils
Abstract

SummaryOils from Buriti (Mauritia flexuosa), Cupuaçu (Theobroma grandiflora), Passion Fruit (Passiflora alata), Andiroba (Carapa guianensis), Brazilian Nut (Bertholletia excelsa) and Babassu (Orbignya spp.) were evaluated as carbon sources for rhamnolipid production by Pseudomonas aeruginosa LBI. The highest rhamnolipid concentrations were obtained from Brazilian Nut (9.9 g l−1) and Passion Fruit (9.2 g l−1) oils. Surface tension varied from 29.8 to 31.5 mN m−1, critical micelle concentration from 55 to 163 mg l−1 and the emulsifying activity was higher against toluene (93–100%) than against kerosene (70–92%). Preliminary characterization of the surfactant mixtures by mass spectrometry revealed the presence of two major components showing m/z of 649 and 503, which corresponded to the dirhamnolipid (Rha2C10C10) and the monorhamnolipid (RhaC10C10), respectively. The monorhamnolipid detected as the ion of m/z 503 is predominant in all samples analyzed.

Keywords
Biosurfactants; Glycolipids; Pseudomonas aeruginosa; Rhamnolipids; Surface-active compounds
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Production of Pseudomonas aeruginosa LBI rhamnolipids following growth on Brazilian native oils
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 2, February 2006, Pages 483–488
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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