Sökning: "Microporosity"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet Microporosity.

  1. 1. On Bone Regeneration in Porous Bioceramics - Studies in humans and rabbits using free form fabricated scaffolds

    Författare :Johan Malmström; Göteborgs universitet; []
    Nyckelord :bone regeneration; hydroxyapatite; zirconia; macroporosity; microporosity; free form fabrication; focused ion beam; scanning electron microscopy; transmission electron microscopy; rabbit; human;

    Sammanfattning : The objective of the present thesis was to evaluate the effect of material chemistry and macroand micro-porosity on bone regeneration in association with synthetic, porous ceramic materials. Ceramic scaffolds were designed and manufactured for experimental and human studies using free form fabrication (FFF), a technique which produces the object layer by layer using data from CAD files. LÄS MER

  3. 2. On the Spray Forming of Metals, the Formation of Porosity and the Heat Evolution during Solidification

    Författare :José Tinoco; KTH; []
    Nyckelord :Thermal analysis; Nodular Cast Iron; Inconel 625; CFD; Flow Assesment; Multiphase Flow; Spray Deposition; Microporosity; Superalloys;

    Sammanfattning : This thesis deals with the heat evolution duringsolidification and its relation to the formation of porosity.It intends to improve the current understanding of theformation of porosity in cast materials with special interestin nodular cast iron and the spray forming process. LÄS MER

  4. 3. Dissolving the Rocks : Solubility Enhancement of Active Pharmaceutical Ingredients using Mesoporous Silica

    Författare :Xin Xia; Alfonso E. Garcia-Bennett; Xiaodong Zou; Göran Frenning; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mesoporous silica; drug delivery; solubility enhancement; active pharmaceutical ingredients; oral toxicity; confinement; crystallization; pharmaceutical excipients; bioavailability; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Poor aqueous solubility is one of the greatest barriers for new drug candidates to enter toxicology studies, let alone clinical trials. This thesis focuses on contributing to solving this problem, evaluating the oral toxicity of mesoporous silica particles, and enhancing the apparent solubility and bioavailability of active pharmaceutical ingredients in vitro and in vivo using mesoporous silica particles. LÄS MER

  5. 4. Engineering tissue – Bacterial cellulose as a potential biomaterial

    Författare :Maricris Esguerra; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Bacterial cellulose Biocompatibility Blood vessels Non-neuronal cholinergic system Smooth muscle cells Tissue engineering;

    Sammanfattning : Cardiovascular diseases are still the predominant cause of death among the adult population in the Western world. Diseases such as myocardial infarction and stroke are caused by occluded blood vessels, as a result of atherosclerosis. LÄS MER

  7. 5. Water film-mediated mineralogical transformations and photocatalytic reactions

    Författare :N. Tan Luong; Jean-Francois Boily; Michael Holmboe; Alejandro Fernandez-Martinez; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; mineral; water films; carbon dioxide; MgO; MnCO3; TiO2; hydroxylation; carbonation; oxidation; transformation; photocatalysis; Inorganic Chemistry; oorganisk kemi; nanomaterials; nanomaterial; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : Mineral particles capture water vapor in the atmosphere in the form of water films that are only few monolayers thick. Water films form nanoscale hydration environments that mediate a wide range of important reactions in nature and technology. LÄS MER