Sökning: "counter-ions"
Visar resultat 1 - 5 av 29 avhandlingar innehållade ordet counter-ions.
1. Enantiomeric Separations using Chiral Counter-Ions
Sammanfattning : 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. LÄS MER
2. NOx Adsorption and Transport in ZSM-5 Films
Sammanfattning : The present work dealt with a fundamental study of NOx adsorption-desorption and transport in ZSM-5 as films supported on cordierite monolith and as a part of composite membranes. The adsorption-desorption study was focused on developing a mechanistic understanding of NOx adsorption in ZSM-5 films including the effects of counter-ions, Si/Al ratios and film thicknesses on the adsorption. LÄS MER
3. The effect of environment on refining efficiency of kraft pulps
Sammanfattning : Although the pulp and paper mill processes have been operational for long time there is still a need to understand the unit operations in paper making and how they interact with the ingoing pulp material. This is crucial in order to fully utilize the potential of the wood as well as of the unit operations. LÄS MER
4. Enhanced Biological Phosphorus Removal -Processes, Competing Substances and Tools for Operation of Wastewater Treatment Plants
Sammanfattning : The idea of phosphorus removal at wastewater treatment plants is to transfer dissolved phosphorus into a solid phase. Together with the rest of the produced sludge it is then removed from the water, resulting in a decreased concentration of phosphorus in the effluent and the prevention of the eutrophication in the recipient. LÄS MER
5. Synthetic studies on the natural products Zoanthamine and Balanol
Sammanfattning : Three main projects are described in this thesis. In the first, a stereocontrolled route tothe marine alkaloid Zoanthamine was studied. A convergent approach based on thechiral starting materials (S)-Perillyl alcohol and (R)-4,5-Dihydro-5-hydroxymethyl-2(3H)-furanone was developed. LÄS MER