Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 27 for “"Biosurfactant"”.
-
Investigation into the impact of biosurfactant in heavy oil reservoirs
… a scale of Enhanced Oil Recovery (EOR) through biosurfactant production, lowering of interfacial tension (IFT) and contact angle, changes in rock wettability of sandstone grains and biosurfactant flooding. Three biosurfactants were produced under laboratory conditions, from three species of the …
-
Enhanced vermiremediation of hydrocarbon contaminated land using biosurfactant: an integrated approach
… the remediation of PAHs from contaminated land. Biosurfactant produced by bacteria is known to aid mobility and bioavailability of contaminants which enhances bioremediation of hydrocarbons. The toxicity of these hydrocarbon compounds are yet to be fully understood. This research investigates the …
-
Conversion of hydrocarbons to biosurfactants : an insight into the bioprocess optimisation of biosurfactant production using alkanes as inducers
… When they are biologically produced, the term biosurfactant is used. One of the most important groups of biosurfactants is a family of chemical compounds known as glycolipids, whose structure consists of a sugar group and a lipid tail. Glycolipids are subdivided into three main groups: …
-
Advanced phytoremediation using soil solarization enhanced with biosurfactant as a novel approach for sustainable remediation of contaminated land in the Niger Delta, Nigeria
… integration with phytoremediation enhanced with biosurfactant as a sustainable remediation option to hydrocarbon contaminated land and to evaluate sustainability feasibility in the Niger Delta contaminated land clean-up. A pilot study showed that native C. odorata, preliminary selected from a …
-
An investigation of biosurfactant-mediated disruption and biological activity in mature biofilms formed on plastic surfaces by LPS mutants of Salmonella enterica serovar Typhimurium
… disinfection and increasing the risk of spread. Biosurfactants, compounds produced by microorganisms, can potentially control biofilm formation as eco-friendly antimicrobial agents and be applied to plastic food packaging to prevent biofilm formation and food spoilage. This study aimed to …
-
Study of Hydrocarbon Waste Biodegradation and the Role of Biosurfactants in the Process
… benefits of organism addition, role of biosurfactant, and dewatering properties. The oily waste sludges differed in characteristics and contained a mixture of water, motor oil, lubricating oil, and other petroleum products. Degradation was measured using COD, suspended solids, GC …
-
Physiochemical and Biological Behaviors of Organic Contaminants in Multi-Phase Media Under Enhanced Treatment Conditions
… also enhanced by introducing organic acids. The biosurfactant-enhanced remediation of PAH-contaminated soil in the presence of SCOAs has been studied. The results supported the combined use of biosurfactant and SCOAs could further enhance the desorption of phenanthrene from soil into aqueous …
-
Screening environmental Pseudomonads for characteristics suitable for a bio-engineered oil remediation agent
Biosurfactants are surface active chemicals expressed by a range of organisms that reduce liquid (aqueous) surface tensions () of aqueous and aqueous-hydrocarbon (oil) mixtures. They are widely used in biotechnology, including agriculture, cosmetics, food, pharmacology and bioremediation, and many …
-
Methanogenic Paraffin Biodegradation and the Underlying Syntrophic Relationships
… gene presence and expression, and factors (biosurfactant production) which affect biodegradation were determined. In addition, gene families related to energy transfer were found to distinguish known and potentially syntrophic environments using metagenomic analysis. This approach was used …
-
Strategies for enhancing bioelectrochemical remediation of petroleum hydrocarbons
… and but not mandatory that could produce biosurfactant were isolated. Each isolate was identified using 16s rRNA region to exclude any potential pathogen. 5 isolates across the matrices produced biosurfactant with emulsification Index ranging from 30%-99%. When compared to a negative …
-
Sustainable treatment of oil contaminated waste: oil-based mud (OBM) drill cuttings and soil.
… drill cuttings and soil. Soil washing using biosurfactant is one of such technological developments. Biosurfactants are surface active compounds produced from biological origin. They are amphiphilic molecules, consisting of hydrophilic and hydrophobic moieties. The major advantage …
-
Novel pleiotropic regulators of gas vesicle biogenesis in Serratia
… and swarming aided by flagellar rotation and biosurfactant production. In addition, S39006 produces gas vesicles to float in aqueous environments and enable colonization of air-liquid interfaces. Gas vesicles are thought to be constructed solely from proteins expressed from a gene cluster …
-
Effects of biologically produced surfactants on the mobility and biodegradation of petroleum hydrocarbons
… effects of biologically produced surfactants (biosurfactants) on petroleum hydrocarbons and their potential for the removal of hydrocarbons from groundwater systems. Bioaurfactanta have been found to be produced by microorganisms during growth on insoluble substrates for the purpose of …
-
Efficiency of biosurfactants applied by means of electrokinetics
An evaluation of the efficiency of rhamnolipids (biosurfactants) used in electrokinetic remediation of soil contaminated with phenanthrene was presented. Bench scale tests were conducted using four experimental series in order to determine the feasibility and mechanisms of biosurfactant-enhanced …
-
Microbial Ecology of Subsurface Oil Sands Deposits in Northern Alberta, Canada
… applications, including hydrocarbon degradation, biosurfactant production and methanogenesis. Thus, the information revealed in this study could be used as the basis for MEOR technologies.
-
A Study of Rhamnolipid Microbubble Dispersion for Bioremediation Applications
… of microbubble dispersions from rhamnolipid biosurfactant and the mechanism and factors that impact upon the effectiveness of the dispersion for improving bioremediation efficiency, with a specific focus on the use of microbubble dispersion as a carrier for contaminant-degrading bacteria …
-
Bioaugmentation with metal-resistance microorganisms in the remediation of metal and organic contaminated soils
… were observed, including exopolymer and biosurfactant production. Two other isolates demonstrated intracellular cadmium accumulation via as yet unknown mechanisms. The mechanism of resistance for one isolate could not be identified. Four out of the six isolates detoxified cadmium as part …
-
The impact of bacteria on the biophysics of water retention and flow in soil
… for bacterial attachment, and viscosin is a biosurfactant released from the bacteria. Four isogenic strains mutated so as to heighten or suppress production of one of these key components were used in addition to the wild-type strain. Labfield sandy loam soil was sieved and packed into …
-
Fate of metals in presence of minerals and mineral-organic assemblages
… uranium from water systems by using synthesized biosurfactant-coated iron oxide nanoparticles, (ii) to elucidate the factors governing the fate of trace metals added in dissolved form to soils and sediments collected from three different natural aquatic systems, (iii) to determine the role of …
-
Identifying Pantoea Genetic Factors Involved in Host Association by Integrating Comparative Genomics with a Dictyostelium discoideum Grazing Resistance Model
… biosynthesis. A novel hexose-based glycolipid biosurfactant, produced by the rhlA and rhlB genes in P. ananatis BRT175, was identified as being key for both swarming motility and grazing resistance. However, the rhlA and rhlB genes were present in both grazing-resistant and -susceptible …
Page 1 of 2