Sökning: "sulfate reduction"

Visar resultat 1 - 5 av 34 avhandlingar innehållade orden sulfate reduction.

  1. 1. Waterborne pollution from mining in cold climates : Potential catchment-scale immobilization of substances by microbial sulfate reduction (MSR)

    Författare :Sandra Fischer; Jerker Jarsjö; Gunhild Rosqvist; Carl-Magnus Mörth; Anna-Kaisa Ronkanen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Arctic; abandoned mines; metal pollution; sulfur isotopes; bacterial sulfate reduction BSR ; nature-based solution NBS ; naturgeografi; Physical Geography;

    Sammanfattning : Waterborne pollution from mining is impacting groundwater and surface water resources in many regions of the world. Main problems include acidification and high levels of dissolved toxic metals that adversely affect humans and ecosystems. LÄS MER

  3. 2. EXT Proteins in Heparan Sulfate Biosynthesis

    Författare :Marta Busse; Marion Kusche-Gullberg; Tarja Kinnunen; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular biology; Molekylärbiologi; Molecular biology; Molekylärbiologi;

    Sammanfattning : Heparan sulfate (HS) is a long unbranched polysaccharide composed of alternating glucosamine and hexuronic (glucuronic or iduronic) acid residues. Modification by sulfate groups in various positions generates a highly heterogeneous molecule. LÄS MER

  4. 3. Exhaust aftertreatment under lean conditions, regenerable SOx traps and NOx reduction catalysts

    Författare :Lisa Kylhammar; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heterogenous catalysis; Selective catalytic reduction; HC-SCR; Sulfur storage; SOx trap; Spectroscopy; Lean exhausts; NOx; Ag Al2O3; DRIFT; XPS;

    Sammanfattning : The aim of this thesis was to investigate i) potential materials for regenerable SOx traps and ii) the influence of silver distribution within Ag/Al2O3 catalysts on the selective reduction of NOx by hydrocarbons (HC-SCR). Both areas are highly relevant for present and future vehicle aftertreatment technologies for lean exhausts. LÄS MER

  5. 4. Precipitation and fixation of uranium in reduced environment : simulation in a continuous culture of sulfate-reducing bacteria

    Författare :Ulf G. Edvardsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The precipitation and fixation of the uranyl ion (U022+), in a reduced environment, has been investigated by means of continuous cultivation of sulphate-reducing bacteria. The continuous culture sustem made it possible to study the chemical reactions under physico-chemical conditions (e.g. LÄS MER

  7. 5. FROM GENE TO STRUCTURE: Formation of Iduronic Acid in Dermatan Sulfate by Two DS-epimerases

    Författare :Benny Pacheco; Matrixbiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : During embryonic development and adult life a wide range of cell behaviors such as differentiation, proliferation and migration are in effect to maintain tissue integrity and function. An integral part of these dynamic processes is the interplay between the cells and their environment, i.e. the extracellular space. LÄS MER