Sökning: "selektivitet"
Visar resultat 11 - 15 av 49 avhandlingar innehållade ordet selektivitet.
11. New Mass Spectrometric Methods for Structure Analysis of Carboxymethyl Cellulose
Sammanfattning : Carboxymethyl cellulose (CMC) is a cellulose derivative, made from cellulose by introduction of carboxymethyl groups along the molecules. The properties of CMC are affected by several parameters where the molar mass and molar mass distribution, degree of substitution (DS) and the distribution pattern along, and between, the cellulose molecules are the most prominent. LÄS MER
12. Efficiency and Selectivity in the Chlorate Process
Sammanfattning : This licentiate thesis presents experimental studies concerning two parts of the electrochemical cell in the chlorate process: a cathode and an anode.Newly synthesized MnOx electrodes were investigated for the cathodic reaction, hydrogen evolution reaction (HER) in the chlorate process. LÄS MER
13. Enzyme-Based Amperometric Biosensors in Flow-Systems for Biomolecule Detection
Sammanfattning : Amperometric enzyme based biosensors were designed, developed and characterised in flow systems. Solid graphite and carbon paste electrodes were used as support for enzyme immobilisation. Both mediated and direct electron transfers between redox enzymes and electrodes were utilised for biosensor construction, as well as coupled enzyme systems. LÄS MER
14. New directions in non-porous membrane extraction
Sammanfattning : Complex biological and environmental samples require a high degree of selectivity in order to determine components therein. Sensitivity measures, such as analyte pre-concentration are often required for assessing composition quantitatively. LÄS MER
15. Functionalized epitaxial graphene as versatile platform for air quality sensors
Sammanfattning : The work presented in this thesis focuses on epitaxial graphene on SiC as a platform for air quality sensors. Several approaches have been tested and evaluated to increase the sensitivity, selectivity, speed of response and stability of the sensors. LÄS MER