Sökning: "electrophoretic mobility"

Visar resultat 1 - 5 av 60 avhandlingar innehållade orden electrophoretic mobility.

  1. 1. Charged colloids observed by electrophoretic and diffusion NMR

    Författare :Erik Thyboll Pettersson; Peter Stilbs; Terence Cosgrove; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Analytical chemistry; ENMR; electrophoretic NMR; dissusion NMR; electrophoretic mobility; double stimulated echo; Analytisk kemi; Analytical chemistry; Analytisk kemi;

    Sammanfattning : The thesis deals partly with methodology including construction of hardware and new pulse sequences in the field of electrophoretic NMR, and partly with practical use of ENMR and diffusion NMR in the investigation of charged colloidal systems. Several sources of artefacts are investigated, including gas production at the electrodes, electroosmosis and Joule heating effects that can cause convection. LÄS MER

  3. 2. Characterizing ions in solution by NMR methods

    Författare :Marianne Giesecke; István Furó; Peter Griffiths; KTH; []
    Nyckelord :electrophoretic NMR; diffusion NMR; NMR imaging; ion pairing; ion association; polyethylene oxide; metal-ion complex; Li ion batteries; electrolyte characterization; Kemi; Chemistry;

    Sammanfattning : NMR experiments performed under the effect of electric fields, either continuous or pulsed, can provide quantitative parameters related to ion association and ion transport in solution.  Electrophoretic NMR (eNMR) is based on a diffusion pulse-sequence with electric fields applied in the form of pulses. LÄS MER

  4. 3. Effects and nature on buffer ion enrichment in electric field assisted liquid chromatography

    Författare :Björn Eriksson; []
    Nyckelord :;

    Sammanfattning : The aim of this study has been to investigate the properties and limitations of the separation technique electric field assisted capillary liquid chromatography (EF-LC). The electric current in the EF-LC has shown to be a limiting factor and has been the focus of the study. LÄS MER

  5. 4. DNA Electrophoresis in Polymer Solutions. Separation Mechanisms studied by Fluorescence and Linear Dichroism Spectroscopy

    Författare :Christina Carlsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mutation detection; orientation; YOYO; DNA electrophoresis; polarized light spectroscopy; optical probing; polymer solutions; fluorescence microscopy; PNA; binding modes;

    Sammanfattning : Capillary electrophoresis of DNA in polymer solutions is a promising technique for separation of DNA molecules according to size. The primary aim of the work presented in this thesis was to get a better understanding of the electrophoretic separation mechanism in these media by studying the DNA migration behavior during electrophoresis in both entangled and non-entangled polymer solutions using linear dichroism spectroscopy and fluorescence video microscopy. LÄS MER

  7. 5. DNA Electrophoresis: Optical Probing and Microscopic Imaging to Understand Separation Mechanisms

    Författare :Anette Larsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; optical probing; YOYO; polarized light spectroscopy; DNA electrophoresis; DAPI; binding modes; helix alignment; fluorescence microscopy;

    Sammanfattning : The aim of this work was to combine spectroscopic, mobility, and fluorescence microscopy studies to elucidate the mechanisms behind DNA electrophoresis, a method to separate DNA molecules according to size. The microscopy studies require staining of the DNA with a fluorescent dye. LÄS MER