Sökning: "H2SO4"
Visar resultat 11 - 15 av 25 avhandlingar innehållade ordet H2SO4.
11. Interface Studies for Gold-based Electrochemical DNA Sensors
Sammanfattning : Gold based label-free electrochemical DNA sensors have been widely studied for biomarker diagnostics. The sensitivity and reproducibility of these sensors are determined by the sensing interface: the DNA modified gold surfaces. LÄS MER
12. Extraction of PCBs and PCDD/Fs from Food and Feed Matrices Using Pressurised Liquid Extraction (PLE)
Sammanfattning : Since the Belgian dioxin crisis in 1999 there has been a great demand for fast, cheap and reliable methods to analyse food and feed samples. Traditional methods use large amounts of solvent for the extraction, are time demanding and laborious, but new and more sophisticated methods have been developed in recent years. LÄS MER
13. Optimisation of Two-step Steam Pretreatment of Softwood for Bioethanol Production
Sammanfattning : Fuel ethanol can be produced from lignocellulosics by an enzymatic process consisting of steam pretreatment, enzymatic hydrolysis, fermentation and ethanol refining. This thesis deals with the steam pretreatment step in the enzymatic process used for ethanol production from softwood, which is an abundant lignocellulosic raw material in the Northern hemisphere. LÄS MER
14. Pool Boiling on Structured Surfaces: Heat Transfer and Critical Heat Flux : Experiments and Mechanistic Modelling
Sammanfattning : In this thesis, pool boiling heat transfer was experimentally studied on structured surfaces with dielectric liquids (HFE-7200, NOVEC-649, FC-72), organic liquids (Acetone, Pentane) and deionized water.In the first step, nanoparticle coatings on copper surfaces were prepared by an electrophoretic deposition method, with Cu-Zn nanoparticles (100 nm) and Cu nanoparticles (150 nm). LÄS MER
15. Refractory High-entropy Alloy and Nitride Thin Films
Sammanfattning : This thesis focuses on understanding the process-structure-property relation-ships for several refractory-metal-based high-entropy alloys and nitrides synthesized by magnetron sputtering. The thesis begins with the growth of TiZrNbTaNx understoichiometric nitrides by controlling substrate temperature and nitrogen flow ratio fN. LÄS MER