Search for dissertations about: "calcium ion"

Showing result 1 - 5 of 115 swedish dissertations containing the words calcium ion.

  1. 1. Studies of individual pancreatic -cells : Electrophysiological analysis of rhythmic behaviour and development of new techniques

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Staffan Dryselius; Uppsala universitet.; [1999]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; Diabetes; pancreatic beta-cells; insulin release; signal transduction; cytoplasmic calcium; oscillations; patch clamp; ATP-regulated potassium channels; voltage-dependent calcium channels; metabolism; calcium ion; strontium ion; manganese ion; wavelets; de-noising; pattern recognition; superfusion; solution changes; microscopic labelling; Cellbiologi; MEDICINE Morphology; cell biology; pathology Cell biology; MEDICIN Morfologi; cellbiologi; patologi Cellbiologi; medicinsk cellbiologi; Medical Cell Biology;

    Abstract : The insulin concentration in blood varies periodically, which is believed to prevent down-regulation of the hormone receptors. Loss of the regular insulin oscillations is considered to be an early sign of developing diabetes. READ MORE

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

    University dissertation from Anders Malmendal, Physical Chemistry 2, Lund University, P.O.Box 124, S-221 00 Lund, Sweden

    Author : Anders Malmendal; Lunds universitet.; Lund University.; [1998]
    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

  3. 3. Interaction of Calcium Ions with Lipid Membranes

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Baharan Ali Doosti; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; phospholipid bilayer membrane; membrane dynamics; micromanipulation; calcium ions; cell migration.; membrane nanotube; membrane tubular protrusions; calcium ion concentration gradient; membrane bending; giant unilamellar vesicle;

    Abstract : Bilayer membranes enclose and shield the biological cell and its inner compartments, as well as the tubular networks that exist within and between the cells. Due to their fluidic nature, the membranes are incredibly dynamic and flexible, which allows them to bend, reshape and fuse in response to mechanical and chemical stimuli within their natural microenvironments. READ MORE

  4. 4. Solvent–Solute Interaction Studied by Synchrotron Radiation Based Photo and Auger Electron Spectroscopies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Wandared Pokapanich; Uppsala universitet.; [2011]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Interatomic Coulombic Decay; ICD; Auger electron spectroscopy; AES; X-ray photoelectron spectroscopy; XPS; Ultra-violet spectroscopy; UPS; localized; delocalized; double ionization potential; DIP; two hole; final states; Water; H2O; Potassium chloride; KCl; Calcium chloride; CaCl2; Ammonium; NH4; Core hole; clock; lifetime; solvated; ion; alkali; halide; Coster Kronig; MAX-lab; BESSY; NATURAL SCIENCES Physics Condensed matter physics Liquid physics; NATURVETENSKAP Fysik Kondenserade materiens fysik Vätskefysik; Physics with spec. in Atomic; Molecular and Condensed Matter Physics; Fysik med inriktning mot atom- molekyl- och kondenserande materiens fysik;

    Abstract : Aqueous solutions were studied using photoelectron and Auger spectroscopy, based on synchrotron radiation and a liquid micro-jet setup.By varying the photon energy in photoelectron spectra, we depth profiled an aqueous tetrabutylammonium iodide (TBAI) solution. READ MORE

  5. 5. Calcium regulation and functions of basic Helix-Loop-Helix transcription factors

    University dissertation from Umeå : Molekylärbiologi

    Author : Juha Saarikettu; Umeå universitet.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; calcium; calmodulin; calretinin; transcription; bHLH; E-protein; E2-2; Molekylärbiologi; NATURAL SCIENCES Biology Cell and molecular biology Molecular biology; NATURVETENSKAP Biologi Cell- och molekylärbiologi Molekylärbiologi; molekylärbiologi; Molecular Biology;

    Abstract : The members of the ubiquitously expressed E-protein subfamily of basic Helix-Loop-Helix (bHLH) transcription factors, E12/E47, SEF2-1 and HEB, have important roles as regulators of gene expression in various differentiation processes, including lymphocyte development and myogenesis. In myogenesis, E-proteins are proposed to function as obligate heterodimer partners for members of the MyoD family of muscle-specific bHLH transcription factors. READ MORE