Search for dissertations about: "solid state diffusion"

Showing result 1 - 5 of 74 swedish dissertations containing the words solid state diffusion.

2. 1. Pushing diffusion MRI towards new dimensions

   Author : Joao Martins; Fysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NMR; MRI; diffusion; relaxation; multidimensional diffusion MRI; relaxation-diffusion correlations; Laplace NMR; porous media; tissue microstructure; heterogeneity; anisotropy;

   Abstract : Diffusion-MRI techniques allow the non-invasive investigation of microstructural changes in living tissues. However, a detailed interpretation of the data is complicated by the fact that multiple microscopic environments with varying diffusion properties all contribute to the measured signal. READ MORE

4. 2. Developing novel diffusion MRI methods for comprehensive analysis of restricted and anisotropic self-diffusion system

   Author : Hong Jiang; Fysikalisk kemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; MRI; diffusion; tissue microstructure; heterogeneity; diffusion encoding; q-vector; ;

   Abstract : Diffusion MRI is a non-invasive imaging technique used to study the microstructural properties of biological tissues by observing the self-diffusion of water molecules. Traditional diffusion MRI methods, based on the pulsed gradient spin-echo sequence, employ magnetic field gradients to encode information about translational motion. READ MORE

5. 3. Quantitative applications of secondary ion mass spectrometry : solid-state diffusion and mass fractionation studies

   Author : Ulf Södervall; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Secondary ion mass spactromy SIMS ; isotopic ratios; elemental semiconductors; ionazion mechanisms; mass fractionation; high pressure; diffusion; activation parameters; isotope effects;

   Abstract : .... READ MORE

6. 4. Exploring Dye-Sensitized Mesoporous NiO Photocathodes : from Mechanism to Applications

   Author : Lei Tian; Haining Tian; Leif Hammarström; Fabrice Odobel; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NiO; p-type; dye-sensitized solar cells; solid state; charge separation; charge recombination; charge diffusion; transport time; surface states; electron conductor; dye regeneration; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

   Abstract : Increasing attention has been paid on solar energy conversion since the abundant solar energy possesses the potential to solve the problems on energy crisis and climate change. Dye-sensitized mesoporous NiO film was developed as one of the attractive photocathodes to fabricate p-type dye-sensitized solar cells (p-DSCs) and dye-sensitized photoelectrosynthetic cells (p-DSPECs) for electricity and chemical fuels generation, respectively. READ MORE

7. 5. Effect of water on the glass transition and properties of solid-state pharmaceutical formulations

   Author : Ekaterina Bogdanova; Vitaly Kocherbitov; Thomas Rades; Malmö universitet; []
   Keywords : glass transition; glass transition temperature; relaxation; sucrose; trehalose; maltodextrin; lysozyme; unfolding; hydration; solid-stae; sorption calorimetry; Health and society; Hälsa och samhälle;

   Abstract : The aim of this thesis was to increase our knowledge of the glassy state and the glass transition phenomenon and to evaluate the effect of water on the glassy state. To accomplish this, investigations were focused on the amorphous sucrose-water (paper I, II, III), trehalose-water (paper I), maltodextrin-water (paper I), and lysozyme-sucrose-water (paper IV) systems. READ MORE