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 92 for “"small angle X-ray scattering (SAXS)"”.
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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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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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Formation, structure, and reproducibility of cerato-ulmin hydrophobin-coated bubbles
… were investigated. For the submicron bubbles, small-angle x-ray scattering (SAXS) and small-angle neutron scattering (SANS) show the bubbles are cylindrical with a ~70 nm cross-sectional diameter and film thickness of 15 nm, the equivalent of 5 CU proteins. Atomic force microscopy (AFM) of …
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The design, synthesis and properties of pressure-processable biodegradable block copolymers
… miscibility of several block copolymer systems. Small-angle neutron scattering (SANS) experiments confirmed that amorphous forms of the poly([epsilon]-caprolactone-ran-5 ethylene ketal [epsilon]-caprolactone)-block-poly(lactic acid) (PmCL-b-PLA) system exhibit pressure- induced miscibility, and …
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Deformation behavior of cylindrical block copolymer bicrystals : pathway to understanding block copolymer grain boundaries
… deformation gradient in the specimen and in situ small angle x-ray scattering (SAXS) was used to monitor the microdomain structural evolution. Finally, finite element simulations illustrated the state of strains of the bicrystal. The symmetric (45-45) bicrystal turns out to be the most complex …
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The Rev-mediated Dimerization of HIV RRE RNA
… (SEC), analytical ultracentrifugation (AUC), and small angle X-ray scattering (SAXS), I demonstrate the formation of a discrete Rev:RRE RNA complex. Data analysis presented in this work suggests that Rev is mediating a dimer of RRE RNA.
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The Rev-mediated Dimerization of HIV RRE RNA
… (SEC), analytical ultracentrifugation (AUC), and small angle X-ray scattering (SAXS), I demonstrate the formation of a discrete Rev:RRE RNA complex. Data analysis presented in this work suggests that Rev is mediating a dimer of RRE RNA.
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Small angle scattering characterisation of micellar systems and templated architectures
… CO2 and selected hydrocarbon environments. Using small angle neutron scattering (SANS) techniques the spacing between liquid crystal micelles was measured in-situ. The liquid crystals studied were templated from different surfactants with varying structural characteristics. Micelles of a dilute …
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Tomographic reconstruction of the morphology of silicon nanoparticleclusters
… layers has previously been characterised via small angle X-ray scattering (SAXS). High resolution TEM studies were also carried out on the nanoparticles at high magnification in order to examine the internal structure of the nanoparticles, which is found to contain both ordered as well as …
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Order in side-chain liquid crystalline diblock copolymers
… challenging problems that precede a wide array of applications. Using sequential anionic polymerization we synthesized a large number of well-defined SCLCBC's. These materials consist of an amorphous, polystyrene (PS) block and a methacrylate-based, LC block with side-chain mesogens that …
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Morphological studies of polymeric systems with liquid crystalline order
… microscopy (TEM), atomic force microscopy (AFM), small angle X-ray scattering (SAXS), and wide angle X-ray scattering (WAXS) are the tools employed. Two-dimensional Ndel inversion walls formed in a nematic monodomain during magnetic realignment of a highly elastically anisotropic thermotropic …
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Surface Modifications of Iron Oxide Nanoparticles for Magnetic Imaging and Diagnosis
… An approach for size determination based on small-angle X-ray scattering (SAXS) was developed, and understanding of particle size distribution led to successful development of alkyne-functionalized nanoparticles allowing for conjugation with biological cargos, creating a novel vehicle for …
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Evaluating the Time-Dependent Melting Behavior of Semicrystalline Polymers Through Strobl's 3-Phase Model
… using differential scanning calorimetry (DSC), small angle X-ray scattering (SAXS), and wide angle X-ray diffraction. DSC experiments confirm the existence of a crystallization time-dependent low endotherm, and melting-recrystallization-remelting processes during heating. SAXS analysis using the …
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Structure-Property Relationships of Isoprene-Sodium Styrene Sulfonate Elastomeric Ionomers
… tailored properties for specific applications. A small molar percentage of ions can be incorporated into a polymer to drastically enhance the properties of the polymer. An ionomer that has been studied is that of isoprene copolymerized with sodium styrene sulfonate (poly(I-co-NaSS)). Research has …
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3D Printing of Specialty Devices for Geochemical Investigations: Real-Time Studies of Goethite and Schwertmannite Formation
… 3D printed reactors and flow devices for in situ small-angle x-ray scattering (SAXS). Schwertmannite (pH 2.7) and goethite (6.2) are precipitated from solution using various setups and observed differences in growth rates are discussed. The data show the potential of 3D printing for enabling novel …
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Automated detection of breast cancer using SAXS data and wavelet features
… cancer screening protocols first by collecting small angle x-ray scattering (SAXS) images from breast biopsy tissue, and second, by applying pattern recognition techniques as a semi-automatic screen. Wavelet based features were generated from the SAXS image data. The features were supplied to a …
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Structural transitions in self-assembled lipid systems driven by induced curvature: from cell-penetrating peptides to programmable vesicles
… using confocal microscopy and synchrotron small angle x-ray scattering (SAXS) and studied the effect of membrane charge and intrinsic curvature. We find that the TAT peptide induces negative Gaussian (‘saddle-splay’) membrane curvature, which is topologically required for pore formation. …
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Microphase Separation Studies in Styrene-Diene Block Copolymer-based Hot-Melt Pressure- Sensitive Adhesives
… and their dynamic mechanical behavior, small angle X-ray scattering (SAXS) and rheological analysis were performed on blends with different compositions. A modified Percus — Yevick model combined with Gaussian functions was used fit the liquid like disordered and bcc — ordered peaks of …
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An investigation of the structure and function of the receptor-type protein tyrosine phosphatase CD148
… predicted structure of CD148 ECD and also used small-angle X-ray scattering (SAXS). My findings reveal that CD148 adopts an elongated non-globular structure resembling a cylinder. Moreover, it has fewer fibronectin type III (FNIII) domains than sequence analysis predicts and features an …
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An investigation of the hydrothermal stability and mineralisation of collagen and their relationship
… tendon using Scanning Electron Microscopy (SEM), Small Angle X-ray scattering (SAXS), X-ray Diffraction (XRD) and Fourier-Transform Infrared Spectroscopy (FT-IR). Differential scanning calorimetry (DSC) studies on demineralised tendon identified a previously unknown high temperature endothermic …
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