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Showing 1 to 13 of 13 for “"xray diffraction"”.
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Structure and conformations of heteropolysaccharides
… adopted by hyaluronate have been studied by Xray diffraction techniques. A four-fold helical structure having a fibre repeat of 3.39 nm is the more readily obtained form. Initial computer model building studies showed that a double helical structure was one interpretation of the data. …
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Characterization of Residual Mineral Content of Bauxite Stockpiles in Saline County, Arkansas: An XRD Analysis Approach
… (ALCOA) Saline County bauxite mine, using Xray Diffraction (XRD) on 25 samples to characterize mineral phases and compare them with preliminary X-ray fluorescence (XRF) data. Gibbsite and kaolinite dominate the mineralogy, with gibbsite showing strong positive correlations with zirconium (r …
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Oxidation addition of H-H bonds to iridium: developing novel active water soluble catalysts for hydrogenation of unsaturates
… NMR spectroscopy, CH analysis and single crystal xray diffraction. <b>(2)</b> reacted with the strong sigma donor PMe₃ to form [IrH2(PMe₃)4]CI <b>(3b)</b> without having to remove the chloride ligand. <b>(2)</b> reacted with monosubstituted acetylenes and an internal diyne in water to form the …
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Lead Free CH3NH3SNI3 Perovskite Thin-Film with P-type Semiconducting Nature and Metal-like Conductivity
… and characterized using various tools such as Xray Diffraction (XRD) and absorption spectroscopy (UV-VIS). The distinctive p-type semiconducting nature and metal like conductivity of CH3NH3SnI3 were confirmed by the measurements of electrical and optical properties. Crystal structures and …
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An examination of trace element concentrations across calcite/aragonite transitions in a Madagascan stalagmite
… a shift in CaCO3 polymorphs identified via XRD (xray diffraction) analysis of speleothem AB-2 from Anjohibe Cave, Madgascar. The ICP-MS Sr/Ca data qualitatively supports the Sr/Ca data collected by the XRF core scanner, exhibiting a sharp decrease in value across the identified mineral …
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Ionic conductivity transitions in antiperovskite ionic conductors
… Carrying out temperature-dependent synchrotron XRay diffraction, differential scanning calorimetry, impedance spectroscopy, neutron diffraction, nuclear magnetic resonance and ab initio molecular dynamics simulation, we show that the 100x increase in ionic conductivity in stoichiometric AP …
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Rapid screening of PEM FC cathode catalysts
… parameter, which were obtained mainly using Xray diffraction (XRD). It was found that the results acquired sing parallel screening methods were similar to those collected with a RDE and a fuel cell.<br/><br/>The thesis concludes with suggestions regarding the future improvement/development of …
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Magnetic and Transport Properties of Oxide Thin Films
… on Al2O3 substrates by pulsed-laser deposition. Xray- diffraction patterns (XRD) show that the films have rutile structure and grow epitaxially along the (101) plane. The diffraction peaks of Cr-doped samples exhibit a systematic shift toward higher angles with increasing Cr concentration. This …
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Silver Doped Hydroxyapatite Coating on Titanium Surfaces and its Effect on Early Bone Response and Osseointegration
… Coated surfaces were characterized using Xray diffraction (XRD). The osteoblast cell attachment, differentiation which is measured by alkaline phosphatase activity, and mineralization which is measured by osteocalcin activity were evaluated using human embryonic palatal mesenchyme cells …
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Synthesis and characterization of nanocrystalline CuCl hybrid films for electroluminescent device fabrication.
… and electrical behaviour. Room temperature Xray diffraction (XRD) confirmed the preferential growth of CuCl nanocrystals whose average radius size was ≈1422 nm in the (111) orientation. Scanning Electron Microscopy (SEM) measurements revealed that the average surface area of the films …
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Metal complexes of anti-tubercular drugs
… as revealed by chromatographic and X-ray diffraction methods. This impelled the use of the solvothermal method as an alternative technique. ISO and PZA metal complexes were synthesised via this method. Unexpected products were obtained, as indicated unambiguously by single crystal Xray …
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Structure and faceting of low-symmetry metal surfaces
X-ray diffraction has, within the past two decades, developed into a powerful analytical tool for determining the atomic structure of crystalline surfaces. The dual advantages of high intensity and high resolution have made this technique thrive at synchrotron radiation sources. The experiments in …
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Recrystallization and Bonding Change Effects in a Sodium Borosilicate Glass Containing Molybdenum Trioxide
Made available in DSpace on 2017-07-06T18:49:00Z (GMT). No. of bitstreams: 3 Kessler_John_H_MS.pdf: 59922115 bytes, checksum: 6c6ad25f81a56cf00a5c45c1ff357ff1 (MD5) Kessler_John_H_MS_ABS.pdf: 491164 bytes, checksum: 59ee13197fca527ef2540c6b37e041a3 (MD5) license.txt: 4813 bytes, checksum: …