Search for dissertations about: "calcium ions"

Showing result 11 - 15 of 134 swedish dissertations containing the words calcium ions.

  2. 11. Calcium Carbonate Precipitation in Presence of Carboxylic Acids

    Author : Karl-Johan Westin; KTH; []
    Keywords : calcium carbonate; precipitation; crystallization; carboxylic acids;

    Abstract : With a metal removal process based on precipitation aimed atthe purification of pulping effluent as a starting point, theinfluence of carboxylic acids on calcium carbonateprecipitation has been studied. The chosen carboxylic acids canact as more or less strong complexing agents for aqueouscalcium, just as many compounds found in pulping liquors. READ MORE

  4. 12. NMR studies on calcium-induced conformational transitions in calmodulin

    Author : Johan Evenäs; Biofysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Physical chemistry; NMR; conformational exchange; calmodulin; calcium binding; Fysikalisk kemi;

    Abstract : Nuclear magnetic resonance (NMR) spectroscopy was used in order to investigate the relationships between structure, dynamics and calcium binding in the intracellular regulatory protein, calmodulin. Calmodulin consists of two similar domains, each binding two calcium ions with positive cooperativity. READ MORE

  5. 13. Shaking the EF-Hand. Dynamics and Ion-Binding to Calmodulin and Calbindin D9k

    Author : Anders Malmendal; Biofysikalisk kemi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; magnesium; line shape; ion binding; EF-hand; cooperativity; conformational exchange; chemical shift; calmodulin; calcium; calbindin D9k; allostery; backbone dynamics; NMR; relaxation; Physical chemistry; Fysikalisk kemi;

    Abstract : The work described in this thesis represents a biophysical approach, mainly using nuclear magnetic resonance (NMR) spectroscopy, to investigate the impact of magnesium ions on the EF-hand calcium-binding proteins calmodulin and calbindin D9k, as well as the dynamics of these proteins at low calcium levels. The x-ray structure of magnesium-saturated calbindin D9k shows a magnesium ion in only one of the two ion binding sites. READ MORE

  6. 14. Engineering alternative scaffold proteins for conditional targeting

    Author : Malin Jönsson; Sophia Hober; Mark Howarth; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Protein Engineering; Conditional targeting; Calcium; Biotechnology; Bioteknologi;

    Abstract : Engineering naturally occurring proteins enables us to customize affinity domains according to our specific needs, tailoring them to become an important tool in a wide array of applications limited merely by our creativity. One of nature’s ways to regulate protein activity is by creating a functional change through alteration of a protein’s tertiary structure upon interaction with metal ions. READ MORE

  7. 15. TCF Bleaching of Softwood Kraft Pulp. Metal Management Procedures

    Author : Harald Brelid; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bleaching; manganese; Kraft pulps; iron; copper; hydrogen peroxide; acid pretreatment; calcium; magnesium; liquid chromatography; ion exchange; metal complexes; EDTA;

    Abstract : The aim of this work has been to increase knowledge of the influence of the metal ion content in softwood kraft pulp on peroxide bleaching and to investigate the effects of different metal management procedures at various stages in the production of TCF pulps (i.e. READ MORE