Measuring mass transfer processes of octane with the help of an alkSalkB::gfp-tagged Escherichia coli.

Détails

ID Serval
serval:BIB_465AE7E59D09
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Measuring mass transfer processes of octane with the help of an alkSalkB::gfp-tagged Escherichia coli.
Périodique
Environmental Microbiology
Auteur(s)
Jaspers M.C., Meier C., Zehnder A.J., Harms H., van der Meer J.R.
ISSN
1462-2912 (Print)
ISSN-L
1462-2912
Statut éditorial
Publié
Date de publication
2001
Peer-reviewed
Oui
Volume
3
Numéro
8
Pages
512-524
Langue
anglais
Résumé
Diffusion of octane from oily droplets in different microscale settings was measured using Escherichia coli expressing the stable green fluorescent protein (GFP) from the alkB promoter of Pseudomonas oleovorans. GFP fluorescence intensities were determined quantitatively at the single-cell level after 1.0 or 2.5 h incubation and compared with different calibration series using known concentrations of octane. By immobilizing the E. coli sensor cells on the bottom glass plate of a microscope flow chamber, it was possible to monitor the diffusion process for octane in aqueous solution as a function of time and distance from non-aqueous phase droplets of octane alone or oily octane mixtures. When a gas phase was included in the flow chambers, octane transport could be demonstrated from the oily mixtures to the cells through both gas and liquid phase. Assays of non-immobilized sensor cells in microdroplets in the presence or absence of soil particles incubated with octane through the vapour phase revealed a slight reduction in the total amount of induced E. coli cells in the presence of soil. Our results indicate the power of using GFP-marked single-cell biosensors in determining microscale bioavailability of organic pollutants.
Mots-clé
Alkane 1-Monooxygenase, Bacterial Proteins/genetics, Bacterial Proteins/metabolism, Base Sequence, Biodegradation, Environmental, Biosensing Techniques, Cytochrome P-450 Enzyme System/genetics, Cytochrome P-450 Enzyme System/metabolism, Diffusion, Escherichia coli/genetics, Escherichia coli/metabolism, Gases/metabolism, Genetic Engineering, Green Fluorescent Proteins, Luminescent Proteins/genetics, Luminescent Proteins/metabolism, Microscopy, Fluorescence, Mixed Function Oxygenases/genetics, Mixed Function Oxygenases/metabolism, Molecular Sequence Data, Octanes/metabolism, Octanes/pharmacology, Promoter Regions, Genetic, Pseudomonas/genetics, Soil Microbiology, Soil Pollutants/analysis, Transcription Factors/genetics, Transcription Factors/metabolism, Water/metabolism
Pubmed
Web of science
Création de la notice
21/01/2008 14:36
Dernière modification de la notice
03/03/2018 16:47
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