Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/22301

TitleCharacterization by electrospray ionization and tandem mass spectrometry of rhamnolipids produced by two Pseudomonas aeruginosa strains isolated from Brazilian crude oil
Author(s)Pereira, Jorge F. B.
Gudiña, Eduardo J.
Dória, M. L.
Domingues, M. R. M.
Rodrigues, L. R.
Teixeira, J. A.
Coutinho, J. A. P.
Keywordsrhamnolipids,
Pseudomonas aeruginosa,
biosurfactants,
mass spectrometry
ESI-MS
Issue date2012
PublisherIM Publications
JournalEuropean Journal of Mass Spectrometry
Abstract(s)In this work, biosurfactants produced by two Pseudomonas aeruginosa strains isolated from Brazilian crude oils were identified by proton nuclear magnetic resonance ((1)H NMR) and further characterized by mass spectrometry (MS) coupled with electrospray ionization (ESI) and tandem mass spectrometry (MS/MS) analysis in positive mode and their surface activities evaluated. Mono-rhamnolipids and di-rhamnolipids were identified for both isolates, but the most abundant were found to be mono-rhamnolipids. The similarity of rhamnolipids produced by the two strains was in good agreement with their surface activities. Both biosurfactants exhibited similar aqueous solution surface tensions, high emulsification indexes and critical micelle concentration values. The results obtained show that ESI-MS and MS/MS analysis alone provide a fast and highly specific characterization of biosurfactants produced by microbial strains.
TypeArticle
URIhttp://hdl.handle.net/1822/22301
DOI10.1255/ejms.1194
ISSN1469-0667
Peer-Reviewedyes
AccessOpen access
Appears in Collections:CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series

Files in This Item:
File Description SizeFormat 
ejms.1194.pdf927,02 kBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID