Sökning: "NATURVETENSKAP Kemi"

Visar resultat 21 - 25 av 5076 avhandlingar innehållade orden NATURVETENSKAP Kemi.

  1. 21. Theoretical and Experimental Studies of Electrode and Electrolyte Processes in Industrial Electrosynthesis

    Författare :Rasmus Karlsson; Ann Cornell; Jan Rossmeisl; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Electrocatalysis; metallic oxides; ruthenium dioxide; titanium dioxide; DSA; doping; selectivity; ab initio modeling; density functional theory; Elektrokatalys; metalloxider; ruteniumdioxid; titandioxid; DSA; dopning; selektivitet; ab initio-modellering; täthetsfunktionalteori; Chemical Engineering; Kemiteknik;

    Sammanfattning : Heterogeneous electrocatalysis is the usage of solid materials to decrease the amount of energy needed to produce chemicals using electricity. It is of core importance for modern life, as it enables production of chemicals, such as chlorine gas and sodium chlorate, needed for e.g. materials and pharmaceuticals production. LÄS MER

  3. 22. Investigating polymorphism in small molecules using three-dimensional electron diffraction

    Författare :Molly Lightowler; Xiaodong Zou; Hosea M. Nelson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; 3D electron diffraction; structure determination; polymorphism; crystallisation; phase identification; small molecule; oorganisk kemi; Inorganic Chemistry;

    Sammanfattning : For scientific, regulatory and intellectual property reasons, the discovery and characterisation of polymorphic systems is an integral aspect of the development process of any solid-formulated drug product. Yet, these studies are often hindered by crystal quality and size, poor yields and the generation of mixtures of phases. LÄS MER

  4. 23. Exploring new protic ionic liquids: From synthesis to fundamental properties

    Författare :Eduardo Maurina Morais; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; thermal analysis; acidity; transport properties; DFT; Protic ionic liquids;

    Sammanfattning : The ionic liquid community frequently leverages the selling point that more than a million new ionic liquids could conceivably be created. Nonetheless, the number of commercially available compounds is orders of magnitude lower. LÄS MER

  5. 24. Interactions Between Water and Cellulose Esters

    Författare :Robin Nilsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; cellulose acetate; wide-angle X-ray scattering; water absorption; Hansen Solubility Parameters; glass transition; water diffusion;

    Sammanfattning : Biopolymers, which are produced from natural sources, are gaining interest as a potential replacement for fossil-based polymers. As such, they are already widely used in several industries, including the food, healthcare, and personal care industries. LÄS MER

  7. 25. Design of carbide-based nanocomposite coatings

    Författare :Erik Lewin; Ulf Jansson; Jörg Patscheider; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; chemistry; thin film; dc magnetron sputtering; carbide; nanocomposite; PVD; solid solution; Chemistry; Kemi; Inorganic chemistry; Oorganisk kemi; Inorganic Chemistry; Oorganisk kemi;

    Sammanfattning : In this thesis research on synthesis, microstructure and properties of carbide-based coatings is reported. These coatings are electrically conducting, and can be tailored for high hardness, low friction and wear, along with load-adaptive behaviour. Tailoring these properties is achieved by controlling the relative phase content of the material. LÄS MER