Sökning: "supercritical"
Visar resultat 16 - 20 av 94 avhandlingar innehållade ordet supercritical.
16. Recent Extraction Techniques with Emphasis on Supercritical Fluid Extraction and Microwave-assisted Extraction
Sammanfattning : Today’s requirements of fast, reliable and selective analytical methods with minimal usage of organic solvents have accelerated the development of new, automated extraction techniques. In this thesis recent extraction techniques with emphasis on supercritical fluid extraction (SFE) and microwave-assisted extraction (MAE) were investigated. LÄS MER
17. Analysis of lipids by supercritical fluid chromatography
Sammanfattning : In this thesis is described the development of new metods for the analysis of triacylglycerols and fatty acid methyl esters by supercritical fluid chromatography. Packed micro columns have been utilized for SFC and the properties of different types of packing materials have been evaluated. LÄS MER
18. Supercritical Fluid Extraction (SFE) in Environmental Analysis
Sammanfattning : .... LÄS MER
19. Techniques in gas and supercritical fluid chromatography
Sammanfattning : .... LÄS MER
20. The Use of Supercritical Fluids to Reduce the Number of Phases in Catalytic Hydrogenation: The Reaction of Fatty Acid Methyl Esters to Fatty Alcohols
Sammanfattning : Supercritical fluids have unique properties - between those of liquids and gases - making them attractive reaction media. In this study, propane was used to change a heterogeneous catalyst from being substrate-covered in gas-liquid hydrogenation reactions into hydrogen-covered in our experiments. LÄS MER