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 20 of 27 for “"micelle formation"”.
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Synthesis of DMAP tethered polymer chains for reversible micelle formation
… chain to create a polymer system capable of micelle formation in solution. These functionalized micelles are designed to be selectively opened and closed by changing the temperature, thus allowing the product to be removed from the micelle and avoiding the diminished catalytic activity that …
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Elaboration of micelle formation in aqueous and two phase solutions by surface active phosphines
… N+)3,1, aggregates in aqueous solution to form micelles. Light scattering experiments were used to determine the hydrodynamic radius of the aggregates. Fluorescence, conductivity, and surface tension experiments were used to measure the critical micelle concentration of these aggregates. …
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Synthesis and <sup>1</sup>H-NMR characterization of amphiphilic acrylate block copolymers to investigate the effect of chain rigidity on micelle formation in solution
… block copolymers may self-assemble to form micelles when triggered by a change in the environment. The effect of chain rigidity can be investigated in better detail if the molecular weights are controlled, as the polymer’s ability to aggregate is also influenced by polymer size. Acrylate and …
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Parameterization of the Gay-Berne coarse-grained potential from atomistically detailed anisotropic free energy volumes
… protein dynamics and lipid membrane and micelle formation...
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The synthesis of amphiphilic diblock copolymers: An investigation into the formation of micelles as a function of hydrophobic block length
… ability to aggregate into protective core-shell micelles. Using RAFT polymerization, copolymers containing poly(acrylic acid) and poly(methyl acrylate) blocks were made with high monomer conversion and narrow distributions of molecular weight for eventual use in medicinal applications. Based on …
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The Physical and Spectroscopic Study of a Series of Poly(3-hexyl thiophene) Homopolymers and Poly(3-hexyl thiophene)-block-Poly(2-hydroxyethyl methacrylate) Diblock Copolymers
… that contain a conjugated polymer block, the conformation of the conjugated polymer can be reflected by spectral changes in the solution. Therefore, it is of interest to study the relationship between the spectral changes and the nature of the conjugated polymer. The fundamental physical …
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Computer simulation of micelle self-assembly.
… amphiphile model to study the self-assembly of micelles. Analysis of the results from these simulations shows that the models exhibit a critical micelle concentration together with cluster size distributions consistent with experiment and theory. Simulations of the single amphiphile model also …
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The synthesis, characterization and catalytic applications of mesocellular silica foams
… using triblock copolymer (PEO-PPO-PEO, Pluronic) micelles to template the formation of silica from tetraethoxysilane precursors. The combination of the polymer amphiphile with a hydrophobic swelling agent (such as trimethylbenzene) resulted in larger pore sizes and more open pore structures than …
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Understanding barriers to efficient nucleic acid delivery with bioresponsive block copolymers
… The pH-responsive secondary structure, micelle formation, and ester hydrolysis were studied prior to the discrete barrier-oriented analysis of the siRNA delivery potential of this library. It is hoped that the tools, materials, and systemic analysis of structure-function relationships in …
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Towards improved simulations of self-organising molecular materials
… here, show a preferential selection of conformations of similar chirality to the solvent. Later in the thesis, this new soft core spherocylinder model, is combined with a recently developed simulation methdology, Statistical Temperature Molecular Dynamics, to study the isotropic-nematic …
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Efficiency of biosurfactants applied by means of electrokinetics
… soil remediation. It was proved that bio-micelles, formed due to the introduction of ex-situ produced biosurfactants, could be transported to the electrode areas due to both electroosmotic and electrophoretic phenomena. It also indicated that the electrokinetic introduction of engineering …
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Understanding aggregation of solvating extractants in applied separations
… another extraction mechanism such as reversed micelle formation. Distribution data collected for lanthanides in a TODGA solvent extraction system were also consistent with a traditional solvation mechanism. The selectivity trend for TODGA across the lanthanide series was found to follow the …
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Synthesis, Characterization, Critical Micelle Concentration and Antimicrobial Activity of Two-headed Amphiphiles
… group to give the 2CCbn series. The critical micelle concentrations (CMC) were measured by the pyrene-based fluorescent probe method. The pyrene excited at 345 nm and fluoresces with maxima at 374 nm (I1) and 385 nm (I3). The stock solution and the dilution series for each amphiphiles were …
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Positronium formation in organic liquids and studies of micelle, liposome and polymer systems by position annihilation technique
… with an electron resulting in a positronium formation (Ps). In the first part of this thesis the formation of positronium in benzene solutions containing various halogenated compounds was studied in the presence and absence of C₆F₆ additives. The observed I₂ values, which are indicative of …
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Electrokinetic separations involving surfactants and proteins
… modifiers was also investigated to minimize micelle formation of the surfactants which leads to zone spreading. For the analysis of serum and urine proteins, the use of high pH buffers was investigated to minimize solute/capillary surface interactions and achieve separation. At high pH's the …
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Investigations into the dynamic uptake of extracellular vesicles and their role in breast cancer metastasis after chemotherapy
… may result in false-positive signals due to micelle formation. EV labelling with CFSE also produced non-specific effects, while dual labelling with both PKH26 and CFSE resulted in EV populations with heterogeneous labelling. EVs bearing a fluorescently tagged EV marker (mEmerald-CD81) were …
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Structural Studies of Recombinant Human β-casein proteins
… N-terminus, β-casein participates in the formation of micelles which carry these otherwise insoluble nutrients indispensable for the growth and development of newborns. Human β-casein, or fragments thereof, are also found to have biological effects such as enhancement of calcium …
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Kinetics of gelation in photoreversible gels
… the azobenzene surfactant is more likely to form micelles than the cis. When mixed with a hydrophobically modified polymer, these micelles can act as crosslinking sites for a gel network. Upon UV irradiation, the crosslinking is disrupted and the gel transitions to a solution state. NMR methods …
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Elastin-Like Peptide Dendrimers: Design, Synthesis, and Applications
… dichroism spectroscopy for all peptides. Conformational change did not show evident dependence on topology, while a higher Tt was observed for dendritic peptides than for their linear control peptides with the same number of GLPGL repeats. Variable-temperature small-angle X-ray scattering …
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Novel fibrillar carbon nanotube heat transfer gels with enhanced thermal conductivities
… due to hydrogen bonding (H bonding) and micelle formation of the amine groups around the carbon nanotube rod-like fibers and the additive-oil matrix. This allowed for high weight percent (Wt %) loadings of carbon nanotubes in the oil. Characterization via thermal graviometric analysis …
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