Search for dissertations about: "reductants"

Showing result 1 - 5 of 18 swedish dissertations containing the word reductants.

  2. 1. Radiation Induced Oxidative Dissolution of UO2

    Author : Ella Ekeroth; Mats Jonsson; Bernd Grambow; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; radiation; radiolysis; UO2; spent nuclear fuel; radicals; oxidants; reductants; rate constants; dissolution; H2O2; H2; Nuclear chemistry; Kärnkemi;

    Abstract : Sammanfattning Denna doktorsavhandling berör oxidativ upplösning av UO2 (som modellsubstans för utbränt kärnbränsle) orsakad av radiolys av vatten samt effekten av H2 på denna denna process. Hastighetskonstanter för oxidation av UO2-pulver med olika oxidanter såsom H2O2 har bestämts experimentellt. READ MORE

  4. 2. Active sites and influence of reaction conditions on the selective catalytic reduction of NOx over the silver-alumina catalyst

    Author : Linda Ström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; microemulsion; nanoalloys; DRIFTS; HC-SCR; indium; palladium; silver; XRD; UV-vis; alumina; NH3-TPD.; Lean NOx reduction; TEM; NH3-SCR;

    Abstract : Hazardous nitrogen oxides (NOx) are challenging to remove from fuel-efficient excess-oxygen operating engines. A promising solution is selective catalytic reduction (SCR) of NOx, using hydrocarbons (HC-SCR) or ammonia (NH3-SCR) as reducing agent. READ MORE

  5. 3. Glutaredoxins : structure, function and mechanism

    Author : Fredrik Åslund; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Thioredoxin (Trx) and glutaredoxin (Grx) are small (9-12 kDa) intracellular disulfide reducing enzymes. They were originally described as hydrogen donors for ribonucleotide reductase (RR), the enzyme that catalyzes the conversion of ribonucleotides to deoxyribonucleotides. READ MORE

  6. 4. Biochemical properties of human glutaredoxins

    Author : Catrine Johansson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Glutaredoxins (Grxs) are highly conserved thiol-disulfide oxidoreductases that utilize electrons from the tripeptide glutathione (GSH) to catalyze thiol-disulfide exchange reactions. Bacteria, yeast and plants contain multiple dithiol Grxs, which are involved in different cellular processes like DNA synthesis, defense against oxidative stress, apoptosis, and regulation of transcription factor binding activity. READ MORE

  7. 5. Computational Fluid Dynamics and Experimental Studies of the Urea-SCR System

    Author : Andreas Lundström; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; urea; SCR; decomposition; CYA; HNCO; NH3; CFD; thermolysis;

    Abstract : Volatile emissions produced by the burning of fossil fuels may be converted on a catalyst to less harmful products. During lean combustion an excess of oxygen in the exhaust gases together with a catalyst effectively oxidizes carbon monoxide and hydrocarbons into carbon dioxide and water. READ MORE