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Showing 1 to 20 of 197 for “"SAXS"”.
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Automated detection of breast cancer using SAXS data and wavelet features
… 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 classifier, which sorted the …
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SAXS and X-ray Crystallography Studies of the Cellulosome from Clostridium thermocellum
… complex. However, small angle X-ray scattering (SAXS) studies indicate that this dimerization does not occur in solution. The crystal structures and additional SAXS studies reveal flexibility in the CohI9—X linker that is surprisingly restricted to two dimensions. In addition, this structure …
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Complex SANS SAXS data evaluation, simulation and interpretation with regard to statistical inference
Die vorliegende Arbeit gibt einen grundlegenden Diskurs zu unterschiedlichen Methoden zur Auswertung von Kleinwinkelstreudaten (SAS Daten), insbesondere hier zum ersten Mal in einem präzise statistisch definierten Rahmen. Die Ermittlung von Strukturinformationen via Anpassungen von physikalischen …
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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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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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A Morphological Study of PFCB-Ionomer/ PVdF Copolymer Blend Membranes For Fuel Cell Application
… a lesser extent. Small angle x-ray scattering (SAXS) of pure S-PFCB showed a strong block copolymer- associated phase separation, on the order of 25 nm. Differential scanning Calorimetry (DSC) confirmed this finding. SAXS also revealed the presence of a peak representing individual ionic …
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Structure-property relationships in novel ionomers
… polyisobutylene exhibit primary and secondary SAXS peaks when the molecular weight distribution is narrow (Mw/Mn ca. 1.15). These SAXS peaks are interpreted as due to non-global lamellar or cylindrical ionic domain order. The non-global ordering strongly affects the tensile and dynamic …
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Structural analysis of nanoparticles by small angle X-ray scattering
… 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 complexes and hamburgers of …
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Phase transitions of poly (l-lactic acid) in bulk and in solution
… wide- and small-angle x-ray scattering (WAXS and SAXS) are adopted as the primary experimental techniques. Crystallization during annealing and drawing in melt-spun PLLA fibers is studied by WAXS with a quantitative evaluation of crystallinity and orientation. This represents the study of phase …
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Crystallization behavior and morphological features of two LARC polyimides and local orientation studies of two semicrystalline model composites
… (TEM), and small angle x-ray scattering (SAXS). Permanganic etching combined with SEM successfully revealed morphological detail, further supported by TEM data. These data support the Avrami analysis results. SAXS data reflected the influence of several crystalliz.ation variables on the …
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Microphase Separation Studies in Styrene-Diene Block Copolymer-based Hot-Melt Pressure- Sensitive Adhesives
… 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 the SAXS intensity profiles. …
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X-ray Scattering Study Of Capillary Condensation In Mesoporous Silica
… condensation agent.The gas sorption method and SAXS were used to extract the pore parameters of the samples.The stresses acting on the silica scaffold due to the presence of water in the pores were deduced by careful analysis of various forces acting on it. The Poisson's ratio and elastic moduli …
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Investigation of O-acetylserine sulfhydrylase enzymes from bacterial pathogens as potential drug targets
… kinetic assays and small-angle X-ray scattering (SAXS), we elucidated the catalytic properties and structural dynamics of NgCysK and SaCysK, demonstrating their distinct substrate specificity. SAXS analysis indicates both enzymes are a single dimeric species in solution with no conformational …
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Structural Analysis of Cylindrical Particles by Small Angle X-ray Scattering
… 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 block copolymers in …
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Shear-induced alignment in block copolymer solutions
… have been used: rheo-optical and in situ rheo-SAXS methods. The AC diblock copolymer and ABC triblock terpolymer with high molecular weights and different morphologies were synthesized via anionic polymerization and the alignment has been monitored from the solutions of neat AC diblock, ABC …
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Untersuchungen zum Orientierungsverhalten von Zwei- und Dreiblockcopolymeren in oszillierenden Scherfeldern
… der resultierenden Orientierung mit 2D-SAXS und TEM wurde an einem Beispiel erläutert. Die Ergebnisse der Doppelbrechungsmessungen entsprechen größtenteils den in der Literatur zu findenden Daten. Abweichungen waren mit Hilfe geringfügiger Unterschiede in den Probenzusammensetzungen …
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Investigation of Phase-Separated Polymeric Materials via X-ray Scattering Techniques
… small, and wide-angle X-ray scattering methods (USAXS/SAXS/WAXS). Specifically, these experimental techniques are employed to investigate the phase separated morphologies that impart unique properties to each class of materials and allow for their use in advanced applications. It is crucial that …
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Morphology-Property Relationships in Semicrystalline Aerogels of Poly(ether ether ketone)
… lamella. Ultra-small angle X-ray scattering (USAXS)/SAXS/Wide angle X-ray scattering (WAXS) was then used to probe the hierarchical nanostructure of PEEK aerogels across a broad range of length scales. The Unified Fit Model was used to extract structural information, which was then used to …
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Structural and morphological characterization of model elastomeric ion containing polymers
… ionomers. For the first time, a bimodal type of SAXS peak was observed for 2000 M̅<sub>n</sub>, PBD ionomer. In the segmented ionene polymers, the effect of the non-ionic segment (PTMO) molecular weight, the nature of the counterion (Cl vs. Br vs. I), and the architecture of the ionene segment …
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Order in side-chain liquid crystalline diblock copolymers
… a combination of small angle X-ray scattering (SAXS) and electron microscopy, and thermal transitions were identified using polarized microscopy, calorimetry, and elevated temperature-SAXS. We found the formation of micron-sized domains and focal-conic superstructures to depend on the length of …
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