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.
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Showing 1 to 10 of 10 for “"Surfactin"”.
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Experimental investigation of sodium surfactin as potential methane-water hydrate formation inhibitor
… investigated the potential of sodium surfactin as methane-water hydrate formation inhibitor. The investigation was conducted in three (3) phases using sodium surfactin. Evaluation was made considering surfactant’s macro size (dosage) and its interaction in the solution, temperature …
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An investigation of biosurfactant-mediated disruption and biological activity in mature biofilms formed on plastic surfaces by LPS mutants of Salmonella enterica serovar Typhimurium
… by Pseudomonas aeruginosa), and in particular surfactin (produced by Bacillus subtilis), on S. Typhimurium wild type (LT2) and its lipopolysaccharide (LPS)-modified mutants (with mutated rfa genes, critical for LPS biosynthesis). Furthermore, evaluate its effectiveness in S. Typhimurium …
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Structural and kinetic studies of surfactant and phospholipid monolayers at the air/liquid interface using sum-frequency generation spectroscopy
… mechanism was discussed. The structure of surfactin, a surface-active lipopeptide, was investigated at the air/water interface. Deuterated analogues of the bio-surfactant were produced from \textit{Bacillus Subtilis} by feeding the bacteria with deuterated glucose and/or deuterated leucine. …
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The role of cross-kingdom biofilms in the epiphytic growth of Zymoseptoria tritici
… by phylloplane bacteria, such as lipase and surfactin, revealed that Z. tritici benefits from increased nutrient uptake in the presence of low concentrations of these compounds, but these benefits are lost at higher concentrations. I also used in vitro assays to confirm that bacterial …
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The role of cross-kingdom biofilms in the epiphytic growth of Zymoseptoria tritici
… by phylloplane bacteria, such as lipase and surfactin, revealed that Z. tritici benefits from increased nutrient uptake in the presence of low concentrations of these compounds, but these benefits are lost at higher concentrations. I also used in vitro assays to confirm that bacterial …
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The physico-chemical and biological analysis of microbial biosurfactants (BSs) for applications towards cancer therapies, wound healing dressings and drug delivery
… rhamnolipids (BS1a), 95/90 rhamnolipids (BS1b), surfactin (BS2) and 1′, 4″-sophorolactone 6′, 6″-diacetate (BS3) were investigated through LC-MS, ATR-FTIR and surface tension analysis. This was followed by examination of cytotoxic activities determined via MTT assay following cell line-specific …
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Greener Surface Active Reagents: Structure, Property and Performance Relationships
… of the molecules. Two new surfactants, Surfactin and FA-Glu, synthesized by genetically engineered bacteria were also evaluated. Both of them showed exceptional surface activity. Genetic engineering also showed its advantages when it was found that Surfactin was limited by its …
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Identifying droplet boundaries: impacts of surface topography on droplet freezing and an investigation of the impacts of surfactant on sprayed droplet dynamics
… nozzles with the addition of a surfactant, Surfactin, at 0.1% concentration by weight added to distilled water, decreasing the surface tension from 72.8 mN/m to 29.2 mN/m. The fan nozzles were tested and observed at 30, 45, and 60 psi (206.8, 310.3, and 413.7 kPa) and the full cone nozzle …
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Characterisation of surfactant-expressing bacteria and their potential bioremediation properties from hydrocarbon-contaminated and uncontaminated soils
… surfactant sequences) with <i>srfAC</i> surfactin subunit 2 identified in strain A2, cytochrome P450 sequences (five strains), catechol-1,2/2,3-dioxygenase sequences (seven strains) with <i>Bacillus subtilis</i> VOC family protein identified in strain A2, lipase gene sequences (eight …
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Detection and further characterisation of the toxins and associated genes of Bacillus cereus
… homology with other peptide synthetases, such as surfactin, gramicidin, bacitracin, tyrocidine and lichenysin. Primers were designed from variable regions of the NRPS consensus sequence to be specific for the B. cereus NRPS gene sequence. A PCR-ELISA detection system was also developed to increase …