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Showing 1 to 20 of 1872 for “"silica"”.

  1. EFFECTS OF MICROTEXTURAL INTERACTIONS OF ORGANICS AND SILICA ON SILICA DIAGENESIS

    Morris, JustinTemple University. Libraries2020

    Opaline silica (opal-A) is thermodynamically unstable at surface conditions and readily transitions into opal-CT and at higher temperatures and pressures, quartz. Past work has used the temperature dependency of this phase transition for paleothermometry in opal-bearing sedimentary rocks. Those …

    temple Repository record

  2. The Raman spectra and structure of silica and the soda-silica glasses

    Wilmot, George BarwickMassachusetts Institute of Technology1955

    Thesis (Ph.D.) Massachusetts Institute of Technology. Dept. of Chemistry, 1955.

    mit Repository record

  3. Novel amorphous silica and silica xerogels for the adsorption of organic pollutants from water

    Tasca, Andrea LucaUniversity of Strathclyde2017

    … and hydrophobic samples of the novel amorphous silica Quartzene and on silica xerogels, synthesised by a low cost and environmentally friendly synthesis, inspired from the work of Bangi, Rao A.P., Hirashima and Rao A.V. [1]. All adsorbents used in this study were also characterised by SEM, FTIR …

    strathclyde Repository record

  4. Characterization of amorphous silica and crystalline silica from rice husk ash on water filtration application

    Zainal, Nur SaadahUniversiti Tun Hussein Onn Malaysia2020

    … at low-cost production and using an effectively silica from natural waste rice husk was evaluated. Rice husk was fired at 700ºC and 1000ºC respectively and produced rice husk ash which mutated to amorphous and crystalline silica. Five samples were fabricated after been mixed with the compositions …

    uthm Repository record

  5. Protein adsorption on nanostructured silica surfaces

    Meißner, Jens2018

    … of globular proteins with nanostructured silica surfaces. It aims to gain a better understanding of the consequences of a high surface curvature and confinement on the adsorption behavior and morphology of the adsorbed protein. The adsorption behavior of lysozyme and 𝛽-lactoglobulin on …

    tu-berlin Repository record

  6. Geothermal energy : silica precipitation and utilization

    Aníta Hauksdóttir 1990-2017

    Silica precipitation experiments have been ongoing at the Reykjanes geothermal power plant, Iceland, since 2011. Silica samples were obtained from the field and thoroughly investigated to estimate the silica’s potential as a marketable product. Targeted applications were studied in detail and the …

    reykjavik Repository record

  7. HPLC Study of Amino-Silica Columns

    Garnero, MartinState University of New York at Buffalo2019

    M.A.

    buffalo Repository record

  8. Spectroscopy of thulium doped silica glass

    Simpson, David AllanVictoria University2008

    … gain; this thereby involves, to some degree, a silica based host material. To date, optical amplification in the telecommunication S-band using thulium-doped silica fibres has been inefficient due to the high phonon energy associated with Si-O bonds in the glass. This work undertakes a …

    vu-aus Repository record

  9. Ionic Mobility In Stuffed-Silica Minerals

    Jones, AlisonThe Open University2000

    … of loosely bound cations in the stuffed-silica minerals nepheline, yoshiokaite and ß-eucryptite has been investigated. The investigation has been extended to include the feldspar minerals albite, K-feldspar and anorthite. The low-frequency dielectric properties of all of the minerals have …

    the-open-u Repository record

  10. Rheological Study of Concentrated Silica Suspensions

    Mishra, Prakash N.

    <p>Concentrated suspensions of silica in water were investigated using a rotational viscometer and a Zeta-Meter. The viscometric data was analyzed for shear dependence, solid concentration dependence and pH dependence. The data for electrophoretic mobility was analyzed for pH dependence.</p><p>The …

    nodak Repository record

  11. Surface Characteristics of Silica Polyamine Composites

    Allen, Jesse James

    … were to explore the surface characteristics of silica polyamine composites (SPC) by elucidating coordination environments, measuring surface stability, and comparisons with analogous materials. Application of SPC materials as supports for heterogeneous catalysts was also investigated. Analytical …

    montana-tech Repository record

  12. Surface Characteristics of Silica Polyamine Composites

    Allen, Jesse James

    … were to explore the surface characteristics of silica polyamine composites (SPC) by elucidating coordination environments, measuring surface stability, and comparisons with analogous materials. Application of SPC materials as supports for heterogeneous catalysts was also investigated. Analytical …

    montana Repository record

  13. Adsorptiemetingen aan een chroomoxide-silica katalysator

    Nuijten, C.E.1971

    eindhoven Repository record

  14. A synthetic silica-alumina bead catalyst

    Jonas, Reginald H.Virginia Polytechnic Institute1947

    vt Repository record

  15. Electrokinetic separations in fused silica capillaries

    Rasmussen, Henrik TorstholmVirginia Tech1990

    Methods of co-optimizing resolution and detection in Capillary Zone Electrophoresis (CZE) and Micellar Electrokinetic Chromatography (MEKC) are examined by deriving mathematical expressions which illustrate the relative importance of various experimental parameters. For CZE, expressions are derived …

    vt Repository record

  16. Untersuchungen zur Herstellung strukturierter, nanoporöser Silica – Gele

    Fischer, AnnetteUniversität Bayreuth

    Nanoporöse Materialien, die über neuartige Synthesewege hergestellt werden, haben in jüngster Zeit vor allem auf speziellen Anwendungsgebieten, wie Membranen, Multilayerbauteilen oder nanostrukturierten Verbundmaterialien verstärkt für Aufsehen gesorgt. Dadurch ist der Sol – Gel – Prozess, …

    bayreuth Repository record

  17. Mitigating alkali silica reaction in recycled concrete

    Li, Xinghe

    … concrete aggregate (RCA) that had shown alkali silica reaction (ASR) distress was evaluated. It was found that ASR mitigation was needed to prevent continued expansion. Several mitigation methods were evaluated and compared to conventional concrete using the testing procedures of ASTM C …

    unh-thes Repository record

  18. Direct liquid crystal templating of mesoporous silica

    Gordon-Smith, Tobias JamesUniversity of Southampton2003

    … with the development of ordered<br/>mesoporous silicas by direct templating from lyotropic liquid crystal phases of the<br/>surfactants Pluronic PI23, Pluronic F127, CTAB and Brij 78. The factors affecting the<br/>regularity, morphology, pore diameter and wall thickness of the templated …

    soton Repository record

  19. Hybridmaterialien aus mesoporösen Silica und ionischen Flüssigkeiten

    Göbel, RonaldUniversität Potsdam

    … und Charakterisierung mesoporöser monolithischer Silica und deren Hybridmaterialien mit Ionischen Flüssigkeiten (ILs, ionic liquids). Zur Synthese der Silicaproben wurde ein Sol-Gel-Verfahren, ausgehend von einer Präkursorverbindung wie Tetramethylorthosilicat angewendet. Der Katalysator mit der …

    potsdam-diss Repository record

  20. CO2 Adsorption on Polyethylenimine-Impregnated Lamellar Silica

    Bogahawatta, VimarshaUniversité d'Ottawa / University of Ottawa2020

    … efficient, amine-containing, lamellar structured silica adsorbents for CO2 removal. Seven different materials were prepared by impregnation of various amounts of PEI, over as synthesized, or partially extracted or calcined lamellar silica. Materials were characterized by powder XRD and SEM. CO2 …

    ottawa-retro Repository record

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