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Surface activity and metabolism of hydrocarbon-degrading microorganisms growing on hexadecane and naphthalene

Paper ID Volume ID Publish Year Pages File Format Full-Text
36450 45133 2005 6 PDF Available
Title
Surface activity and metabolism of hydrocarbon-degrading microorganisms growing on hexadecane and naphthalene
Abstract

Screening of 45 hydrocarbon-degrading bacteria demonstrated that 75% of strains growing on hexadecane were able to produce surfactants. The studied strains were separated into the following types: (i) those accumulating surfactants associated with the cell wall (endo-type) and (ii) those excreting surfactants into culture medium (exo-type). The most active exo-type strains growing on hexadecane excreted formate, acetate, succinate, β-alanine, β-o-butyrate, trehalose and fatty acids into the medium. In all studied exo-type strains growing on hexadecane, surfactants were fatty acids as intermediate products of hydrocarbon degradation. During growth on naphthalene, the exo-type surfactants were probably caprylic acid and its unsaturated analogues as products of biosynthesis de novo.

Keywords
Surface activity; Biosurfactants; Microorganism; Naphthalene; Hexadecane; Fatty acids; Caprylic acid
First Page Preview
Surface activity and metabolism of hydrocarbon-degrading microorganisms growing on hexadecane and naphthalene
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 8, July 2005, Pages 2643–2648
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering