Search for dissertations about: "surface diffusion"

Showing result 1 - 5 of 411 swedish dissertations containing the words surface diffusion.

  1. 1. Diffusion in Bone Tissue

    University dissertation from Solid Mechanics, Faculty of Engineering, Lund University

    Author : Gustav Lindberg; Lunds universitet.; Lund University.; [2013-11]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bone growth; diffusion; stress enhanced; finite element method; steady-state; periosteal membrane; diffusion in bovine bone; diffusion experiment; Conductivity measurement; Fick’s law; Fourier series; Kalman filter; transient solution;

    Abstract : In order to prevent or modify the processes of bone degeneration the modeling and remodeling of bone tissue must be better understood. In this thesis it is assumed that the primary condition leading to bone growth is a change of the chemical environment caused by transport of matter resulting from stress driven diffusion. READ MORE

  2. 2. Diffusion of Radionuclides in Bentonite Clay Laboratory and in sity Studies

    University dissertation from Stockholm : KTH

    Author : Mats Jansson; KTH.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Bentonite; montmorillonite; cation; anion; diffusion; sorption; cobalt; caesium; strontium; iodide; pertechnetate; surface diffusion; in situ; NATURAL SCIENCES Chemistry; NATURVETENSKAP Kemi;

    Abstract : This thesis deals with the diffusion of ions in compactedbentonite clay. Laboratory experiments were performed toexamine in detail different processes that affect thediffusion. To demonstrate that the results obtained from thelaboratory investigations are valid under in situ conditions,two different kinds of in situ experiments were performed. READ MORE

  3. 3. Studies of ionic diffusion in crystalline rock

    University dissertation from Stockholm : Kemiteknik

    Author : Yvonne Ohlsson; KTH.; [2001]
    Keywords : matrix diffusion; surface diffusion; surface conductivity; nuclear waste; rock; mineral; electrical conductivity;

    Abstract : .... READ MORE

  4. 4. Insights into Materials Properties from Ab Initio Theory Diffusion, Adsorption, Catalysis & Structure

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Andreas Blomqvist; Uppsala universitet.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Density functional theory; Molecular dynamics; Diffusion; Catalysis; Adsorption; Random structure search; Hydrogen-storage materials; Phase-change materials; NATURAL SCIENCES Physics Condensed matter physics Defects and diffusion; NATURVETENSKAP Fysik Kondenserade materiens fysik Defekter och diffusion; NATURAL SCIENCES Physics Condensed matter physics Surfaces and interfaces; NATURVETENSKAP Fysik Kondenserade materiens fysik Ytor och mellanytor; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : In this thesis, density functional theory (DFT) calculations and DFT based ab initio molecular dynamics simulations have been employed in order to gain insights into materials properties like diffusion, adsorption, catalysis, and structure.In transition metals, absorbed hydrogen atoms self-trap due to localization of metal d-electrons. READ MORE

  5. 5. Towards specific quantification of exosomes using surface-based sensing

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Deborah Rupert; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; label-free; surface plasmon resonance.; exosome; binding rate; antibody; concentration; nanoparticle tracking analysis; quantification; liposome; cluster of differentiation 63 CD63 ; diffusion; specific detection; mass transport limited conditions; extracellular vesicles; surface-based biosensor;

    Abstract : When exosomes were first observed in 1967, they were believed to be cell debris until extensive studies demonstrated key biological functionalities related to their composition and formation mechanism. Exosomes are nanometer-sized lipid vesicles of endocytic origin, with a membrane consisting of lipids and proteins and encapsulating a cargo composed of soluble proteins and genetic material. READ MORE