Search for dissertations about: "divalent ion"

Showing result 1 - 5 of 25 swedish dissertations containing the words divalent ion.

2. 1. Molecular Insight into Ion-Specific Interactions : Vibrational Sum Frequency Study of the Carboxylic Acid Moiety

   Author : Adrien Sthoer; Eric Tyrode; Paul Cremer; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; specific ion effects; carboxylic acid; fatty acid Langmuir monolayer; vibrational sum frequency spectroscopy; VSFS; Electrical double layer;

   Abstract : Ion specific effects at charged interfaces find numerous applications in colloidal sciences and play a vital role in many biological processes. Despite having been studied for over a century, starting with the work of F. Hofmeister in the 1880s, a comprehensive molecular  understanding remains elusive. READ MORE

4. 2. Plant Phosphoinositide Kinases. A Study of PtdIns 4-kinases and a PtdIns 4-phosphate 5-kinase

   Author : Tomas Westergren; immunologi och glykobiologi - MIG Avdelningen för mikrobiologi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; regulation; plant phosphorylation; plasma membrane; lipid kinase; divalent ion; phosphoinositide; substrate specificity; Plant biochemistry; Växtbiokemi;

   Abstract : Phosphoinositides are of particular interest in signal transduction processes as they can be sequentially phosphorylated and used as precursors for the intracellular messengers inositol trisphosphate (InsP3) and diacylglycerol (DAG) that in turn affects calcium levels and protein kinase cascades, eventually leading to a physiological response. The activity and regulation of PtdIns 4-kinases and PtdInsP kinase was studied. READ MORE

5. 3. Metal ion cooperativity in Escherichia coli RNase P RNA

   Author : Mathias Brännvall; Britt-Marie Sjöberg; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cell and molecular biology; RNase P; divalent metal ions; substrate interaction; Cell- och molekylärbiologi; Cell and molecular biology; Cell- och molekylärbiologi; mikrobiologi; Microbiology;

   Abstract : RNase P is an essential ribonuclease responsible for removal of the 5’ leader of tRNA precursors. Bacterial RNase P consists of an RNA subunit and a small basic protein. The catalytic activity is associated with the RNA subunit, i.e. READ MORE

6. 4. Enantiomeric Separations using Chiral Counter-Ions

   Author : Jakob Haglöf; Curt Pettersson; Anders Karlsson; Jacques Crommen; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Capillary Electrophoresis; Chiral Counter-Ion; Divalent Dipeptide; Enantioselectivity; Electroosmosis; Chemometrics; Molecular Descriptor; Structure-Enantioselectivity Relationship; Pharmaceutical chemistry; Farmaceutisk kemi; Analytical Pharmaceutical Chemistry; Analytisk farmaceutisk kemi;

   Abstract : This thesis describes the use of chiral counter-ions for the enantiomeric separation of amines in non-aqueous capillary electrophoresis. The investigations have been concentrated on studies of the influence, of the chiral counter-ion, the solvent, the electrolyte and the analyte, on the enantioselective separation. READ MORE

7. 5. Fundamental Characterization and Technical Aspects of a Chelating Surfactant

   Author : Ida Svanedal; Håkan Edlund; Magnus Norgren; Krister Holmberg; Mittuniversitetet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; chelating surfactant; DTPA based surfactant; pH-responsive; characterization; surface tension; NMR diffusometry; conditional stability constants; interaction parameter; ion flotation;

   Abstract : The purpose of this study was to investigate the fundamental characteristics of a chelating surfactant in terms of solution behaviour, chelation of divalent metal ions, and interaction in mixtures with different foaming agents and divalent metal ion, as well as examining its prospects in some practical applications. Chelating surfactants are functional molecules, with both surface active and chelating properties, which are water soluble and therefore suitable for chelation in many aqueous environments. READ MORE