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.

Results

Showing 1 to 7 of 7 for “"Siliciumdioxid"”.

  1. Der agglutinierende, antifungale Faktor aus den Knollen von Cyperus esculentus: Optimierung der Reinigung und weitere Untersuchungen zur Hemmung des Wachstums phytopathogener Pilze

    … von 48.7 % ermittelte. Der sehr hohe Anteil an Siliciumdioxid (22 %1) konnte allerdings nicht bestätigt werden. Nach direkter Veraschung und anschließender gravimetrischer Silicatbestimmung wurde ein Silicatanteil von nur 5.3 % ermittelt. Das für die strukturelle Aufklärung durchgeführte 29Si CP …

    wurz-thes Repository record for Der agglutinierende, antifungale Faktor aus den Knollen von Cyperus esculentus: Optimierung der Reinigung und weitere Untersuchungen zur Hemmung des Wachstums phytopathogener Pilze (opens in a new tab)

  2. Characterisation of silica in Equisetum hyemale and its transformation into biomorphous ceramics

    Equisetum spp. (horsetail / “Schachtelhalm”) is the only surviving genus of the primitive Sphenopsids vascular plants which reached their zenith during the Carboniferous era. It is an herbaceous plant and is distinguished by jointed stems with fused whorl of nodal leaves. The plant has been used …

    potsdam-diss Repository record for Characterisation of silica in Equisetum hyemale and its transformation into biomorphous ceramics (opens in a new tab)

  3. Organische Reaktionen an stark sauren Nafion-Silica nanokompositen Katalysatoren

    This paper decribes the study on several organic reactions over highly acidic Nafion/Silica catalysts. Via embedding nano-sized Nafion particles within a highly porous silica matrix, a nano-composite catalyst is manufactured, which got tremendously improved desorption and adsorption properties. …

    aachen Repository record for Organische Reaktionen an stark sauren Nafion-Silica nanokompositen Katalysatoren (opens in a new tab)

  4. Investigation of 'high-k' materials as alternative dielectrics for AlGaN/GaN-based metal-insulator-semiconductor heterostructure field effect transistors (MISHFET)

    Gallium Nitride (GaN) based heterostructure field-effect transistors (HFET) are promising devices for high-power applications at high frequencies, as to be found in communication technology. The devices benefit from the properties GaN has to offer, namely a wide bandgap, a high carrier mobility and …

    aachen Repository record for Investigation of 'high-k' materials as alternative dielectrics for AlGaN/GaN-based metal-insulator-semiconductor heterostructure field effect transistors (MISHFET) (opens in a new tab)

  5. Silica-based nanocomposite membranes via the sol gel process of polyethoxysiloxane within a sulfonated poly(ether-ether-ketone) matrix: morphology and proton mobility

    This thesis deals with the preparation and characterization of hybrid organic/inorganic membranes obtained from solutions, where the organic phase is the sulfonated poly(ether ether ketone) (SPEEK) and the inorganic phase are silica nanoparticles obtained from the in situ "water free" sol-gel …

    aachen Repository record for Silica-based nanocomposite membranes via the sol gel process of polyethoxysiloxane within a sulfonated poly(ether-ether-ketone) matrix: morphology and proton mobility (opens in a new tab)