Biosurfactant production by subsurface microorganisms

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dc.contributor.advisorWard, C. H.en_US
dc.creatorFrancy, Donna S.en_US
dc.date.accessioned2009-06-03T23:56:36Zen_US
dc.date.available2009-06-03T23:56:36Zen_US
dc.date.issued1991en_US
dc.description.abstractBiosurfactants have potential for enhancement of in situ biorestoration. A study was performed to characterize biosurfactant production by microbes from several subsurface environments contaminated with petroleum hydrocarbons. Emulsification of hydrocarbons was used to identify microorganisms with the greatest potential to produce biosurfactants. Biostimulated zone microbes contained the greatest proportion of emulsifiers as compared to contaminated and pristine zone microbes. Biostimulation was the dominant factor which selected for and encouraged growth of microbial emulsifiers; exposure to hydrocarbon was also important. The degree of emulsification by biostimulated microbes was greater for the contaminant hydrocarbon than for heavier fuels. Emulsification of hydrocarbons may be an important mechanism in biorestoration by increasing the bioavailability of the contaminant; however, no attempt was made to assess this possibility or relationship. Since biosurfactants are emulsion stabilizers, they merit further attention for enhancement of in situ aquifer restoration.en_US
dc.format.extent104 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoThesis Env.Sci. 1991 Francyen_US
dc.identifier.citationFrancy, Donna S.. "Biosurfactant production by subsurface microorganisms." (1991) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/13524">https://hdl.handle.net/1911/13524</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/13524en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectEnvironmental scienceen_US
dc.subjectMicrobiologyen_US
dc.subjectBiologyen_US
dc.titleBiosurfactant production by subsurface microorganismsen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEnvironmental Scienceen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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