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 20 for “"hydrophobic effect"”.
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Self-Assemblies Driven by the Hydrophobic Effect
… One key aspect of the properties of water is the hydrophobic effect, and whilst there is an appreciation of this phenomenon at the macro-scale (raindrops falling off leaves) and the micro-scale (the structure of cellular systems), a complete understanding at the molecular level still eludes …
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Statistical physics of biological self-organization : case studies in protein folding and adaptation to time-varying fields
… to develop a phenomenological model of how the hydrophobic effect impacts the structure of proteins, and in the second half, we study the phenomenon of adaptation and Darwinian selection from the standpoint of nonequilibrium statistical physics. It has been known for a long time that the …
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Solution properties of some gaseous hydrocarbons in water-alkanol mixtures
… discussed here but with particular reference to hydrophobic interactions in the solution.<br/><br/>It is shown that the extent of these interactions can be observed in the isotherms of ΔH and ΔS at low concentrations of alcohol and a numerical method was used to estimate the magnitude of the …
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Synthesis of guanidinium-functionalized amphiphiles for the exploration of chaotropic supramolecular nanoribbons
Nanoscale self-assembly driven by the hydrophobic effect is of intense research interest due to the ability to synthesize complex, chemically diverse structures with molecular length scales. Supramolecular self-assemblies comprised of amphiphilic molecules have been engineered to achieve diverse …
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Theoretical and simulations-based modeling of micellization in linear and branched surfactant systems
… molecules possessing hydrophilic (head) and hydrophobic (tail) moieties. This dual nature of surfactants leads to interesting phase behavior in aqueous solution as a function of surfactant concentration, including: (i) formation of surfactant monolayers at surfaces and interfaces, and (ii) …
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Dynamic combinatorial synthesis of donor-acceptor catenanes
… which raises the ionic strength and encourages hydrophobic association. More importantly, a mechanism that explains and predicts the structures formed is proposed, giving a fundamental insight into the role played by hydrophobic effect and donor-acceptor interactions in this process. Building on …
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Water-Soluble Deep-Cavity Cavitands: Synthesis, Molecular Recognition, and Interactions with Phospholipid Membranes
… opportunity to study self-assembly driven by the hydrophobic effect. These molecular hosts dimerize in the presence of certain guest molecules to form water-soluble molecular capsules. These systems have given rise to numerous novel chemical phenomena and have potential use in drug delivery. The …
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Structure, Assembly, and Maturation of High -Density Lipoproteins
… of proteins and lipids are driven by the hydrophobic effect. This is followed by a slower protein tertiary structure rearrangement which eventually results in the formation of a double-belt model discoidal HDL particle. The conversion of discoidal HDL into spherical HDL particles is …
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Structure, Assembly, and Maturation of High-Density Lipoproteins
… of proteins and lipids are driven by the hydrophobic effect. This is followed by a slower protein tertiary structure rearrangement which eventually results in the formation of a double-belt model discoidal HDL particle. The conversion of discoidal HDL into spherical HDL particles is …
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A computer-simulation-based molecular-thermodynamic model for shape-based screening of peptide amphiphile micelles in vaccines
… of the shape of PAMs on factors such as the hydrophobic effect and interactions between peptide head groups is assessed.
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Interfacial Phenomena and Surface Forces of Hydrophobic Solids
At the molecular level the entropic “hydrophobic effect” is responsible for high interfacial energies between hydrophobic solids and aqueous liquids, the low solubility of apolar solutes in aqueous solvents, and self-assembly in biological processes, such as vesicle formation and protein folding. …
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THERMODYNAMIC PROPERTIES OF THE UNFOLDED ENSEMBLE OF PROTEINS
… sequence-randomized version of this protein. The effect of variability in thermodynamic conditions, such as temperature and the presence of added chaotropes or kosmotropes, on the equilibrium properties and reconfiguration dynamics of the unfolded state, have been deduced in the absence of …
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Theoretical studies of the dynamics of gas-phase and gas/surface atom+alkane reactions and of the structure and dynamics of water confined between hydrophobic surfaces
… non-reactive dynamics at the interface between hydrophobic surfaces and water requires an understanding of the fundamental atomic and molecular interactions that undergird these important phenomena. In an effort to study these regimes of chemical interaction, we have performed computational …
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Fundamental investigations on the barrier effect of polyester micro fiber fabrics towards particle-loaded liquids induced by surface hydrophobization
… present work is the improvement of the barrier effects of textile fabrics in the medical sector, in particular, in the operating room, which would be an effective safeguard against the causative pathogens allowing the health workers to work in and around hostile atmospheres and to accomplish …
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Molecular-thermodynamic and simulation-assisted modeling of interfacial energetics
… der Waals and electrostatic interactions, the hydrophobic effect, and entropic considerations, to drive the autonomous aggregation of simple building blocks into intricate architectures. This bottom-up approach has increasingly become the mainstay of the colloids community in its quest to …
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The impact of protein fluctuations on molecular recognition
The effect of protein fluctuations on molecular recognition is poorly understood. Prediction of useful properties such as binding affinity using rigid structures has produced sporadic success. Although attempts have been made to model the effect of\r\nconformational fluctuations, capturing the …
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Self-assembly behavior in hydrophilic block copolymers
… block copolymers is assumed to be driven by the hydrophobic. The motivation of this thesis is to study the influence on the self-assembly in water of A b B type block copolymers (with A hydrophilic) of the variation of the hydrophilicity of B from non-soluble (hydrophobic) to totally soluble …
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Folding and aggregation of amyloid peptides
… relates to solvent entropy, presumably caused by hydrophobic and electrostatic effects. In contrast to the transition towards fibril-like dimers the first step of aggregation is driven by entropy. Here, we compared structural and thermodynamic properties of the individual monomer, dimer and trimer …
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Dynamics of water and aqueous protons studied using ultrafast multi-dimensional infrared spectroscopy
… such as proton transport, solvation, the hydrophobic effect and protein folding. In this thesis, I present our efforts in understanding the dynamics governing hydrogen bond switching and vibrational energy dissipation in water, and the transport of excess protons in strong acid solutions. …
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Development of novel nano-coating applied on metal stencils used in the manufacture of printed circuit boards and similar products
… improved, tribologically enhanced, and hydrophobic surface has driven extensive research into advanced coating techniques and materials. This will enhance the application of the surfaces in various automobile and structural applications. This enhancement will not only help reduce …