Sökning: "Martin Green"

Visar resultat 21 - 25 av 27 avhandlingar innehållade orden Martin Green.

  1. 21. Improved Usage of Wood Raw Material through Modification of the Kraft Process

    Författare :Daniel Tavast; Elisabet Brännvall; Mikael Lindström; Martin Lawoko; Kerstin Forsberg; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; kraft process; impregnation; xylan; spruce; Chemical Engineering; Kemiteknik;

    Sammanfattning :    The kraft process is a complex system with many variables, and though the process is fairly well understood, there is still much we do not know.    This thesis examines some aspects of the kraft process that could prove to be of interest for the pulp and paper industry, specifically, the impact of wood chip impregnation and of the chemical structure of xylan on spruce kraft pulp. LÄS MER

  3. 22. Synthesis and Characterization of Some Nanostructured Materials for Visible Light-driven Photo Processes

    Författare :Rania Elhadi Adam; Omer Nour; Magnus Willander; Nicolas Martin; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ZnO; Nanoparticles; Nanocomposites; Heterostructures; Photocatalysis;

    Sammanfattning : Nanostructured materials for visible light driven photo-processes such as photodegradation of organic pollutants and photoelectrochemical (PEC) water oxidation for hydrogen production are very attractive because of the positive impact on the environment. Metal oxides-based nanostructures are widely used in these photoprocesses due to their unique properties. LÄS MER

  4. 23. Seagrass Respiration : An assessment of oxygen consumption patterns of temperate marine macrophytes

    Författare :Lina M. Rasmusson; Mats Björk; Martin Gullström; Katharina Pawlowski; Jonas Collén; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mitochondrial respiration; Photorespiration; Seagrass productivity; Zostera marina; Marine carbon budgets; Ruppia maritima; Ulva intestinalis; Plant Physiology; växtfysiologi;

    Sammanfattning : In coastal seas, the abundance of marine macrophytes has profound influence on the flows of oxygen and inorganic carbon through the water. Vast amounts of carbon dioxide are taken up by photosynthesis and part of this is respired back into the water column. LÄS MER

  5. 24. Controlled growth of metastable Ta3N5 semiconducting films

    Författare :Jui-Che Chang; Ching-Lien Hsiao; Jens Birch; Grzegorz Greczynski; Martin Rudolph; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The semiconductor tritantalum pentanitride (Ta3N5) is a promising material for green energy applications, specifically in the photoelectrolysis of water to produce oxygen and hydrogen. With a bandgap of approximately 2 eV, Ta3N5 is well-suited for efficient solar light absorption across a broad spectrum, and its band positions align favorably with the redox potential of water. LÄS MER

  7. 25. Novel methods to study mitochondrial gene expression and homeostasis

    Författare :Magdalena Rzepka; Martin Ott; Christof Osman; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mitochondria; gene expression; metabolism; biokemi; Biochemistry;

    Sammanfattning : Mitochondria are semi-autonomous organelles that harbor one of the main cellular processes – energy conversion. Nutrients available in the environment are taken up by cells and transformed into metabolites that can be used for synthesis of ATP, the energy currency of the cell. LÄS MER