Search for dissertations about: "large wood"

Showing result 1 - 5 of 275 swedish dissertations containing the words large wood.

  1. 1. Diffusion of large molecules in steam-exploded wood

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Patric Kvist; [2019]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Large Molecules; FRAP; LBM; Wood; Diffusion; Steam Explosion;

    Abstract : The diffusion of large molecules in wood pre-treated with steam explosion is important to understand in the context of the materials biorefinery. Steam explosion is a pretreatment method used to both open up the internal structure of wood and increase the accessibility of the cell walls of the wood with the use of high-pressure steam, and it is considered an energy-efficient method. READ MORE

  2. 2. Characterization, toxicity and treatment of wood leachate generated outdoors by the wood-based industry

    University dissertation from Växjö : Linnaeus University Press

    Author : Henric Svensson; Linnéuniversitetet.; [2014]
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Wood leachate; Log yard runoff; Stormwater; Toxicity; Artemia salina; Vibrio fischeri; Constructed wetlands; Forestry and Wood Technology; Skog och träteknik;

    Abstract : Wood is a natural raw material, and would hardly be considered a risk to the environment. However, the handling of wood materials on an industrial scale has been shown to have a negative impact on water bodies that run-off from industrial sites that process wood-based materials. READ MORE

  3. 3. Growth hormone, JAKs and STATs : A model cytokine signal transduction system

    University dissertation from Stockholm : Karolinska Institutet, false

    Author : Tim Wood; Karolinska Institutet.; Karolinska Institutet.; [1996]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : The haematopoietic cytokine family of signalling molecules comprises a variety of polypeptides which have pleiotropic effects on cell differentiation, tissue development and homeostasis. The family includes several interleukins, a variety of growth and colony stimulating factors, erythropoietin, leukaemia inhibitory factor, ciliary neurotrophic factor, the interferons, as well as leptin, prolactin and growth hormone. READ MORE

  4. 4. Ice, wood and rocks regulating elements in riverine ecosystems

    University dissertation from Umeå : Umeå universitet, Institutionen för ekologi, miljö och geovetenskap

    Author : Johanna Engström; Umeå universitet.; [2010]
    Keywords : riparian zone; timber floating; river restoration; cut-off side channels; hydrochory; large wood; anchor ice; fish;

    Abstract : Riparian ecosystems are of great importance in the landscape, connecting landscape elements longitudinally and laterally and often encompassing sharp environmental gradients in ecological processes and communities. They are influenced by fluvial disturbances such as flooding, erosion and sediment deposition, which create dynamic and spatially heterogeneous habitats that support a high diversity of species. READ MORE

  5. 5. Modelling of the pyrolysis of large wood particles

    University dissertation from Stockholm : KTH

    Author : Michel Bellais; KTH.; [2007]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; drying; modelling; pyrolysis; shrinkage; wood; TECHNOLOGY Chemical engineering Chemical process and manufacturing engineering Chemical energy engineering; TEKNIKVETENSKAP Kemiteknik Kemisk process- och produktionsteknik Kemisk energiteknik;

    Abstract : Wood is an interesting alternative to fossil fuels. It is CO2-neutral and widely available. However it is a difficult fuel to handle which features a low energy content. Thus technologies for wood thermal conversion need to be improved. READ MORE