Emulsifier production by Acinetobacter calcoaceticus strains

Nechemia Sar*, Eugene Rosenberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Nondialyzable bioemulsifiers were found in the extracellular fluid of 16 different strains of Acinetobacter calcoaceticus following growth on ethanol-salts medium. The amount of emulsifying activity, its specific activity, and hydrocarbon substrate specificity varied from one strain to another. In general, strains that grew well on the ethanol medium (2.4-2.6 mg cell dry wt/ml) produced high emulsifying activities (88-239 units/ml), whereas strains that grew more poorly (1.0-1.7 mg cell dry wt/ml) also produced less emulsifying activity (14-52 units/ml). With one exception, hexadecane/2-methylnaphthalane mixtures were emulsified more efficiently than pure hexadecane or 2-ethylnaphthalane.

Original languageEnglish
Pages (from-to)309-313
Number of pages5
JournalCurrent Microbiology
Issue number6
StatePublished - Nov 1983


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