Sökning: "Johannes Kemi"

Visar resultat 1 - 5 av 7 uppsatser innehållade orden Johannes Kemi.

  1. 1. Influence of The Heavy Atom Effect on The Cage Escape Yields of Iron(III)-Photosensitizers with N-Heterocyclic Carbene Ligands

    Master-uppsats, Uppsala universitet/Fysikalisk kemi

    Författare :Johannes Wega; [2022]
    Nyckelord :;

    Sammanfattning : The recent emergence of earth-abundant iron(III)-photosensitizers with N-heterocyclic carbene ligands, exhibiting nanosecond ligand-to-metal charge-transfer states with suitable redox potentials to activate a broad range of substances, offers the possibility to convert sunlight into chemical substances, such as fuels or pharmaceuticals, in an environmentally friendly way. These complexes, however, often suffer from low yields of charge-separated products escaping the solvent cage, making such applications inherently inefficient. LÄS MER

  3. 2. Inhibition Kinetics of Hydrogenation of Phenanthrene

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Johannes Johansson; [2019]
    Nyckelord :Catalytic hydrotreating; Phenanthrene; Inhibition kinetics; Model development; Nonlinear regression;

    Sammanfattning : In this thesis work the hydrogenation kinetics of phenanthrene inhibited by the basic nitrogen compound acridine and the non-basic carbazole was investigated. Based on a transient reactor model a steady state plug flow model was developed and kinetic parameters were estimated through nonlinear regression to experimental data. LÄS MER

  4. 3. Svenska hushålls fosforfotavtryck

    Kandidat-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Tobias Bennet; William Bergmark; Susanna Claesson; Erika Holte; Johannes Järvinen; [2019]
    Nyckelord :Phosphorus; Footprint; Literature Study; Sustainability;

    Sammanfattning : Phosphorus is a vital element that is currently being consumed in an unsustainable manner. The element is crucial to humanity's food supply systems. In this study, the amount of phosphorus required to meet an average Swedish household's annual consumption was calculated. LÄS MER

  5. 4. Estimation of Noise and Contrast for CTA of the Brain

    Kandidat-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Johannes Loberg; Miranda Gisudden; [2018]
    Nyckelord :CT - Computed Tomography - CTA- Computed Tomography Angiography - Photon Counting - CNR - Contrast to noise;

    Sammanfattning : Computed tomography angiography (CTA) of the brain poses challenges on the imaging system; the contrast between blood vessels and surrounding soft tissue is very low, and to render small intricate vessel structures high spatial resolution is needed. Higher precision angiography would facilitate more accurate diagnosis of pathological conditions. LÄS MER

  7. 5. Towards novel fullerene dumbbells : Synthesis of conjugated linkers

    Kandidat-uppsats, Uppsala universitet/Institutionen för kemi - BMC

    Författare :Johannes Kazen Orrefur; [2015]
    Nyckelord :;

    Sammanfattning : .... LÄS MER