Search for dissertations about: "catalytically active"

Showing result 6 - 10 of 90 swedish dissertations containing the words catalytically active.

  2. 6. Poly(A)-Specific Ribonuclease (PARN)

    Author : Yan-Guo Ren; Eric Westhof; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cell and molecular biology; Poly A -specific ribonuclease; PARN; deadenylation; processive; oligomeric; cap interacting; aminoglycoside; active site; FE2 -mediated cleavage; metal ion switch; Cell- och molekylärbiologi; Cell and molecular biology; Cell- och molekylärbiologi; Molekylär cellbiologi; Molecular Cellbiology;

    Abstract : Degradation of the mRNA 3'-end located poly(A) tail is an important step for mRNA decay in mammalian cells. Thus, to understand mRNA decay in detail, it is important to identify the catalytic activities involved in degrading poly(A). READ MORE

  4. 7. Expression of Manganese Lipoxygenase and Site-Directed Mutagenesis of Catalytically Important Amino Acids : Studies on Fatty Acid Dioxygenases

    Author : Mirela Cristea; Ernst H. Oliw; Chao Su; Olof Rådmark; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pharmaceutical pharmacology; Dioxygenase; Gaeumannomyces graminis; lipoxygenase; Magnaporthe grisea; oxylipin; Pichia pastoris; hydroperoxide isomerase; polyunsaturated fatty acids; Farmaceutisk farmakologi; Pharmaceutical pharmacology; Farmaceutisk farmakologi;

    Abstract : Polyunsaturated fatty acids can be bioactivated by two families of dioxygenases, which either contain non-heme iron (lipoxygenases) or heme (cyclooxygenases, linoleate diol synthases and α-dioxygenases).Lipoxygenases and their products play important roles in the pathophysiology of plants and fungi. READ MORE

  5. 8. Materials design and characterization of the active regions of gas sensitive field-effect devices

    Author : Anna Elisabeth Åbom; Udo Weimar; Linköpings universitet; []
    Keywords : ;

    Abstract : Metal-Insulator-Semiconductor (MIS) field-effect devices with catalytic metal layers are sensitive to several important gases, such as hydrogen, ammonia, hydrocarbons and alcohols. The gas sensitivity and selectivity depends on the properties of the active regions of the device. READ MORE

  6. 9. Stepping into Catalysis : Kinetic and Mechanistic Investigations of Photo- and Electrocatalytic Hydrogen Production with Natural and Synthetic Molecular Catalysts

    Author : Daniel Streich; Leif Hammarström; Reiner Lomoth; Clifford Kubiak; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Artificial photosynthesis; photocatalysis; electrocatalysis; hydrogen production; proton reduction; hydrogenase; iron complex; active site model; catalytic mechanism; transient absorption; spectroscopy; electrochemistry; cyclic voltammetry; Kemi med inriktning mot kemisk fysik; Chemistry with specialization in Chemical Physics;

    Abstract : In light of its rapidly growing energy demand, human society has an urgent need to become much more strongly reliant on renewable and sustainable energy carriers. Molecular hydrogen made from water with solar energy could provide an ideal case. READ MORE

  7. 10. 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