Sökning: "oxygen evolution"

Visar resultat 6 - 10 av 153 avhandlingar innehållade orden oxygen evolution.

  1. 6. Ecology and evolution of coastal Baltic Sea 'dead zone' sediments

    Författare :Elias Broman; Mark Dopson; Nils Risgaard-Petersen; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Baltic Sea; sediment; oxygen; metatranscriptomics; metagenomics; 16S rRNA gene; RNA-seq; dead zone; re-oxygenation; Akvatisk ekologi; Aquatic Ecology;

    Sammanfattning : Since industrialization and the release of agricultural fertilizers began, coastal and open waters of the Baltic Sea have been loaded with nutrients. This has increased the growth of algal blooms and because a portion of the algal organic matter sinks to the sea floor, hypoxia has increased. LÄS MER

  3. 7. Engineering inorganic nanostructured composites for boosting H2 and O2 evolution reactions

    Författare :Getachew Solomon; Isabella Concina; Alberto Vomiero; Sixto Gimenez; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hydrogen evolution HER ; Oxygen evolution reaction OER ; Oxygen reduction reaction ORR ; Water splitting; Electrocatalyst; Atomic layer deposition; Core-shell structure; Experimentell fysik; Experimental Physics;

    Sammanfattning : Hydrogen is considered a promising energy source with zero emission of CO2; it can provide higher energy density compared to other sources of energy. The amount at which H2 is produced, and the method of production need further improvement for the advancement of hydrogen energy technologies. LÄS MER

  4. 8. Stolen genes, a shortcut to success : Evolution of metabolic and detoxification capacities in Diplomonads

    Författare :Alejandro Jimenez-Gonzalez; Jan Andersson; Thomas A. Richards; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Diplomonads; Parasitism; Evolutionary Genomics; Metabolism; Lateral Gene Transfer;

    Sammanfattning : Parasites do not represent a single evolutionary lineage meaning that they have evolved several times. The changes that parasites have undergone to adapt to such a lifestyle are not entirely understood. LÄS MER

  5. 9. Influence of the electrolyte on the electrode reactions in the chlorate process

    Författare :Linda Nylén; Göran Lindbergh; Ann Cornell; Mårten Behm; Geoeff H Kelsall; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chlorate; chloride oxidation; critical anode potential; chromate; DSA; hydrogen evolution; iron; mass transport; oxygen evolution; REM; RDE; steel; Electrochemistry; Elektrokemi;

    Sammanfattning : The chlorate process is very energy intensive and a major part of the production costs are for electrical energy. Since the electricity prices are constantly increasing and may also vary periodically, the chlorate plants may be forced to adjust their production rate to the price at each moment in order to minimise their costs. LÄS MER

  7. 10. Chemical Abundance Analysis of Population II Stars : The Summary Includes a Background in General Astronomy

    Författare :Karin Jonsell; Bengt Gustafsson; Bengt Edvardsson; Paul Barklem; Christopher Sneden; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomy; Galactic evolution; Halo; Milky Way; Oxygen; r-element; s-element; Stellar abundances; Astronomi; Astronomy and astrophysics; Astronomi och astrofysik;

    Sammanfattning : We are made of stardust in the sense that most atomic nuclei around us have been formed by stars. Stars synthesise new elements and expel them to the interstellar medium, from which later new generations of stars are born. We can map this chemical evolution by analysing the atmospheric contents of old Galactic halo stars. LÄS MER