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Applied and Environmental Microbiology, October 2004, p. 6333-6336, Vol. 70, No. 10
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.10.6333-6336.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Stabilization of Oil-Water Emulsions by Hydrophobic Bacteria

Loredana S. Dorobantu,1 Anthony K. C. Yeung,1 Julia M. Foght,2 and Murray R. Gray1*

Department of Chemical and Materials Engineering,1 Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada2

Received 9 March 2004/ Accepted 15 June 2004

ABSTRACT

Formation of oil-water emulsions during bacterial growth on hydrocarbons is often attributed to biosurfactants. Here we report the ability of certain intact bacterial cells to stabilize oil-in-water and water-in-oil emulsions without changing the interfacial tension, by inhibition of droplet coalescence as observed in emulsion stabilization by solid particles like silica.

* Corresponding author. Mailing address: Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2G6, Canada. Phone: (780) 492-7965. Fax: (780) 492-2881. E-mail: murray.gray{at}ualberta.ca.

Applied and Environmental Microbiology, October 2004, p. 6333-6336, Vol. 70, No. 10
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.10.6333-6336.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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