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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 202 for “"small angle X-ray scattering"”.
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Structural analysis of nanoparticles by small angle X-ray scattering
… nano-scaled particles by the combination of small angle x-ray scattering (SAXS), electron microscopy (TEM and cryo-TEM) and dynamic light scattering (DLS). Two systems with totally di_erent morphologies and compositions have been investigated: spherical particles of calcium-phosphate-protein …
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Structural Analysis of Cylindrical Particles by Small Angle X-ray Scattering
… to analyze nano-scaled cylindrical particles by small angle X-ray scattering (SAXS). Three systems with cylinder-shaped particles: (1) Laponite particles in aqueous solutions, (2) Poly(carbon suboxide) particles in binary water/DMF solutions, and (3) Suprastructural aggregates of coil-ring-coil …
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Weighting protein ensembles with Bayesian statistics and small-angle X-ray scattering data
… of experimental constraints is usually much smaller than the degrees of freedom in the protein, the ensemble construction process is under-determined, meaning there are many different ensembles that agree with a given set of experimental observables. The Variational Bayesian Weighting program …
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Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
A small angle X-ray scattering (SAXS) study of quenched-in nanovoids in 99.988 and 99.995 at.% aluminum (Al) is presented. Nanovoids are agglomerations of point defects (vacancies) in the metallic host. SAXS is a non-destructive, dynamic probe which is ideally suited to characterize nanoscale …
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Direct visualization of cold denaturation of cytochrome-C Using Small Angle X-Ray Scattering
… study of the cold denaturation of proteins using Small Angle X‐Ray Scattering. The radius of gyration of equine Cytochrome‐C is determined for varying salt and denaturant conditions at temperatures ranging from ‐25 to 60 degrees Celsius. Radius of gyration measurements are then compared to a …
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Morphological Characterization and Analysis of Ion-Containing Polymers Using Small Angle X-ray Scattering
Small angle X-ray scattering (SAXS) has been widely used in polymer science to study the nano-scale morphology of various polymers. The data obtained from SAXS give information about sizes and shapes of macromolecules, characteristic distances of partially ordered materials, pore sizes, and so on. …
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Counterion Distribution around a Macroion in Polyelectrolytes Probed by Anomalous Small-Angle X-ray Scattering
… in solution has been carried out using Anomalous Small Angle X-ray Scattering (ASAXS) in order to probe the counterion correlation around the macroion. In the course of this study, different polyelectrolyte systems such as, rod-like polyelectrolytes, spherical polyelectrolyte brushes and star …
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Anomalous Small Angle X-ray Scattering (ASAXS) analysis of nanocrystals in glass ceramics: structure and composition
Das Ziel der vorliegenden Arbeit ist eine quantitative Analyse von Nanokristallen in Bezug auf deren Struktur und Zusammensetzung. Diese Analyse wird von allen beteiligten Phasen (kristallin und amorph) von zwei verschiedenen Nano-Glaskeramiken mit Hilfe der anomalen Röntgenkleinwinkelstreuung …
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Characterization of ethanol induced protein gels by ultra-small angle x-ray scattering and rheological measurements
… solvent systems of ethanol and water. Ultra-small angle X-ray scattering (USAXS) was used to characterize zein ensembles formed in aqueous ethanol. The results showed that zein assemblies possessed three levels of structural hierarchy. Zein formed rod-like structures at one dimension (1D) …
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Studies of Protein-Protein and Protein-Water Interactions by Small Angle X-Ray Scattering, Terahertz Spectroscopy, ASMOS, And Computer Simulation
… Molecular Dynamics simulations, and the global X-ray scattering of the whole model ensemble was computed at each snapshot of the simulation. The interaction potential model was optimized and iterated by a Levenberg-Marquardt algorithm. Secondly, we report that terahertz spectroscopy directly …
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Small Angle X-ray Scattering study of conformational changes in steroid responsive activator (SRA) RNA upon binding with suppressor protein SHARP
… from oligonucleotides and T7 RNA polymerase. Small angle X-ray scattering was then used to investigate and compare the structures of the three-dimensional conformations of SRA RNA-SHARP2 complexes to the free-SHARP2 and the free-STR7 RNA structures to better understand how SHARP carries out …
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The topology and electrical properties of nanoparticle networks
… using laboratory and synchrotron based small angle X-ray scattering and ultra-small angle X-ray scattering, as well as with a new surface scattering technique developed for this research, which can be described as wide angle low q scattering. A new scaling model applied to the small …
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A Morphological Study of PFCB-Ionomer/ PVdF Copolymer Blend Membranes For Fuel Cell Application
… the morphology of this material, using small angle x-ray scattering, differential scanning calorimetry, atomic force micrscopy, and some other techniques to a lesser extent. Small angle x-ray scattering (SAXS) of pure S-PFCB showed a strong block copolymer- associated phase separation, …
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Thermal and Morphological Study of Segmented Multiblock Copolyesters Containing 2,2,4,4-Tetramethyl-1,3-cyclobutanediol
… out using differential scanning calorimetry, small angle X-ray scattering, wide angle X-ray diffraction and dynamic mechanical analysis. Molecular origins of the thermal transitions appearing in copolyesters were assigned by the copolyester analysis at different temperatures. The hard segments …
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Simulating, refining and modeling protein structures with multi-scale methods
… Diffraction, cryo-Electron Microscopy (cryo-EM), Small Angle X-ray Scattering (SAXS) and X-ray Crystallography, we show that our methods can be employed to improve the study of protein structures. In detail, the atomic structure of actin filament was refined against fiber diffraction data by our …
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Structure, Assembly, and Maturation of High -Density Lipoproteins
… simulations with comparisons to experimental small-angle X-ray scattering results which begin to characterize the initial stages of HDL biogenesis. Starting from all-atom simulations done to characterize the double-belt structure of discoidal HDL particles. Then moving on to the development …
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Structure, Assembly, and Maturation of High-Density Lipoproteins
… simulations with comparisons to experimental small-angle X-ray scattering results which begin to characterize the initial stages of HDL biogenesis. Starting from all-atom simulations done to characterize the double-belt structure of discoidal HDL particles. Then moving on to the development …
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Morphologies of PDMS-containing diblock polymers
… and their morphologies are investigated using small angle x-ray scattering and transmission electron microscopy. Good agreement is found between this work and other work on the structures of diblocks containing PDMS with a variety of complementary blocks and between this work and theoretical …
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Synthesis, Characterization, and Utilization of Polyol Amphiphile Molecules
… by a variety of techniques including small angle x-ray scattering and polarized optical microscopy. Interestingly, the polyol amphiphiles also formed anisotropic phases in the neat state, although of lower order than hydrated phases. In addition, the aqueous mesophases have been …
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