Search for dissertations about: "Aqueous Solutions"

Showing result 11 - 15 of 255 swedish dissertations containing the words Aqueous Solutions.

2. 11. Statistical Mechanical Studies of Aqueous solutions and Biomolecular Systems

   Author : Fernando Luis Barroso Da Silva; Beräkningskemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; highly charged macromolecules; dielectric discontinuity; dissociation constant; Tanford-Kirkwood model; protein mutation; electrostatic interactions; chemical potential; titration; biomolecules; computer simulations; radial distribution function; electrolyte solutions; continuum model.; Theoretical chemistry; quantum chemistry; Teoretisk kemi; kvantkemi;

   Abstract : This thesis is concerned with theoretical studies of aqueous solutions and biomolecular systems. Part of the present work is to understand equilibrium solvent and solute properties, while the other part is to study processes that occur in these solutions. READ MORE

4. 12. Precipitation of Kraft Lignin from Aqueous Solutions

   Author : Tor Sewring; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; modified Poisson-Boltzmann model; particle size distribution; pair interactions; kraft lignin; acid precipitation; in situ measurements;

   Abstract : One way of improving the materials yield of a kraft paper pulp process, and simultaneously providing the industry with aromatic macromolecular structures, is to extract lignin from the black liquor. This can be done by lowering the pH of the black liquor, which will result in the precipitation of the lignin. READ MORE

5. 13. Rechargeable Aqueous Batteries Based on Available Resources : Investigation and Development towards Efficient Battery Performance

   Author : Mylad Chamoun; Dag Noréus; Gunnar Svensson; Jekabs Grins; Ann Mari Svensson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; rechargeable aqueous batteries; alkaline electrolytes; aqueous sulfate electrolytes; zinc electrodes; manganese dioxide electrodes; iron electrodes; air electrodes; oxygen electrocatalysts; Inorganic Chemistry; oorganisk kemi;

   Abstract : Batteries employing water based electrolytes enable extremely low manufacturing costs and are inherently safer than Li-ion batteries. Batteries based on zinc, manganese dioxide, iron, and air have high energy relevancy, are not resource restricted, and can contribute to large scale energy storage solutions. READ MORE

6. 14. Ion pairing and Langmuir-like adsorption at aqueous surfaces studied by core-level spectroscopy

   Author : Victor Ekholm; Olle Björneholm; Jan-Erik Rubensson; Markus Ammann; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; XPS; Surface; Aqueous; Liquid jet; Langmuir;

   Abstract : Surface-bulk equilibria for solutes in aqueous solutions are studied using X-ray Photoelectron Spectroscopy (XPS) with high surface and chemical sensitivity. In the first part, the results show a reduction of the biochemically relevant guanidinium ions’ surface propensity with the addition of disodium sulphate due to ion pairing with the strongly hydrated sulphate ion, which could have implications for protein folding. READ MORE

7. 15. Interfacial properties of calcium montmorillonite in aqueous solutions : Density functional theory and classical molecular dynamics studies on the electric double layer

   Author : Guomin Yang; Göran Lindbergh; Ivars Neretnieks; Michael Holmboe; Jan Forsman; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Clay minerals; Bentonite; density functional theory; molecular dynamics; GROMACS; electric double layer; electrolytes; ionic liquids; primitive model; CLAYFF forcefield.; Chemical Engineering; Kemiteknik;

   Abstract : The swelling properties of Bentonite are highly affected by clay content and the clay-water interactions that arise from the ion distribution in the diffuse double layer formed near the charged montmorillonite (or smectite) surfaces. Existing continuum models describing the electric double layers, such as classical Poisson-Boltzmann and DLVO theory, ignore the ion-ion correlations, which are especially important for multivalent ions at high surface charge and ionic strength. READ MORE