Sökning: "Spruce wood"

Visar resultat 1 - 5 av 201 uppsatser innehållade orden Spruce wood.

  1. 1. Utvärdering av biotopvårdande åtgärder i Grimåsbäcken. En analys av fysikaliska egenskaper och sammansättning av makroevertebrater.

    Kandidat-uppsats, Göteborgs universitet / Instiutionen för biologi och miljövetenskap

    Författare :Björn Andermo; [2024-01-22]
    Nyckelord :Channelized streams; retention; biotope preservation; macroinvertebrates; bottom substrate; woody debris.;

    Sammanfattning : Many streams have been exposed to extensive anthropogenic impact for the benefit of forestry and agriculture. The effects has mainly been channelization characterized by lowered and straightened channels. This homogeneous morphology leads to decreased ability to retain water as well as lost connection to the floodplain. LÄS MER

  3. 2. Population dynamics of the spruce bark beetle Ips typographus in forest conservation areas and the interaction with biodiversity and natural enemies

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Evelina Andersson; [2023]
    Nyckelord :spruce bark beetle; population dynamics; conservation areas; biodiversity; natural enemies; species richness; managed forests; woodland key-habitats; nature reserves;

    Sammanfattning : Biodiversity is rapidly decreasing and in need of more conservation efforts. However, the tree-killing European spruce bark beetle, Ips typographus (L.), has made forest conservation controversial by affecting conservation areas and possibly adjoining managed forests, yet is still a keystone species leaving decaying wood promoting biodiversity. LÄS MER

  4. 3. Investigation of Milled Wood Lignin Extraction Using Enzymatic Hydrolysis for Application in Hydrophobic Barriers in the Food Packaging Industry

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Anna Wagne; [2023]
    Nyckelord :Lignin; extraction; hydrophobicity; chemical engineering; Technology and Engineering;

    Sammanfattning : The objective of this report is twofold: to optimise the extraction method of lignin from spruce altering a few process parameters and to investigate the use of lignin as a hydrophobic barrier in food applications. The process used was STEX (steam explosion) pretreatment followed by enzymatic hydrolysis and MWL (milled wood lignin) extraction using a mixture of dioxane-water. LÄS MER

  5. 4. Inverkan av skruvars installation på fuktinträngning i trä

    Kandidat-uppsats, Lunds universitet/Byggproduktion

    Författare :Erik Arnebrant; [2023]
    Nyckelord :Moisture Content; Wood; Timber; Screws; Installation; Technology and Engineering;

    Sammanfattning : Wood and wood-based materials are common materials used in buildings, both in- and outdoors. However, wood is vulnerable to water and moisture which is why it is essential to keep it dry and prevent moisture from getting into the wood. LÄS MER

  7. 5. Trendspaning på skogsintressenter – Lärk

    Kandidat-uppsats, SLU/School for Forest Management

    Författare :Malin Ullberg; Johan Knuts; [2023]
    Nyckelord :samhällsvetenskaplig studie; djupintervju; miljövänligt; alternativt träslag; klimatförändring; skogsbruk;

    Sammanfattning : Med en medeltemperatur som ökar och ett torrare klimat till följd av klimatförändringar står det svenska skogsbruket inför utmaningar. Det torrare klimatet medför en ökning av skadeinsekter som gynnas av högre temperaturer och angriper de trädslag som utgör majoriteten av det svenska skogsbruket. LÄS MER