Sökning: "Eucalyptus"

Visar resultat 11 - 15 av 48 uppsatser innehållade ordet Eucalyptus.

  1. 11. Implementation of native tree species in Rwandan forest plantations : recommendations for a sustainable sector

    Master-uppsats, SLU/Dept. of Forest Ecology and Management

    Författare :Roberto Enrico Stelstra; [2021]
    Nyckelord :silviculture; tropical; mixed plantations; indigenous species;

    Sammanfattning : The forest plantations in Rwanda have been dominated by monocultures of exotic species, primarily Eucalyptus and Pinus, for the last 100 years. This type of monoculture leaves the forests vulnerable to disturbances like pests and droughts, and has a negative impact on the species biodiversity in the Rwandan forests. LÄS MER

  3. 12. Location decisions regarding forest plantations in Brazil : Which aspects are important to actors in the Brazilian tree industry?

    Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Katarina Nilsson Lannerstedt; [2020]
    Nyckelord :Eucalyptus; sustainable development; land use; decision-making; policy; legislation; independent forest certification; economic sustainability; environmental sustainability; social sustainability;

    Sammanfattning : Brazilian productive forest plantations and sustainability is a continuous subject of debate, since such forest plantations constitute an increasing proportion of the Brazilian forest cover, and because of documented instances where some establishments have resulted in negative impacts on local ecosystems and communities. Meanwhile, balancing economic, environmental and social sustainability is becoming an important concern in industrial decision-making given the increasing importance of the global sustainability goals. LÄS MER

  4. 13. Development of magnetic lignin nanoparticles from low-molecular-weight eucalyptus and spruce lignin fractions

    Kandidat-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Anna Wessén; Eliot Diklev; Lejla Al-Tamimi; [2020]
    Nyckelord :Magnetic nanoparticles; Hardwood; Softwood; Self-assembly; Lignin;

    Sammanfattning : Lignin is one of the most common biopolymers in the world. Together with cellulose andhemicellulose it constitutes the fibers in the wood. It has a high molecular weight due to its complexstructure consisting of crossed-linked phenolic monomers and is concatenated with different types ofcarbon and ether bonds. LÄS MER

  5. 14. The Effect of Calcium on Delignification in Kraft Cooking of Eucalyptus

    Master-uppsats, KTH/Skolan för kemi, bioteknologi och hälsa (CBH)

    Författare :Eashwara Raju Senthilkumar; [2019]
    Nyckelord :Delignification; Carbohydrates; Lignin; Yield; Calcium; Delignifiering; Kolhydrater; Lignin; Utbyte; Kalcium;

    Sammanfattning : Delignifiering under sulfat koket innefattar både kemisk nedbrytning och fysisk upplösning av lignin, för vilket närvaron av oorganiska salter, oorganiska anjoner samt oorganiska katjoner (sammantaget benämnda som "Non-process elements", NPEs på engelska) kan ha inverkan på delignifieringens hastighet. Tidigare studier har funnit att ved med högt kalciuminnehåll är svårdelignifierad och att kalcium har potentiell inverkan på ligninlöslighet och kappatal. LÄS MER

  7. 15. Characterization of geographical variation in antioxidative active Eucalyptus camaldulensis extracts : for future use as biopesticides in Burkina Faso

    Master-uppsats, Lunds universitet/Tillämpad biokemi; Lunds universitet/Beräkningskemi

    Författare :Ebba Rosendal; [2018]
    Nyckelord :Pure and applied biochemistry; biopesticides; eucalyptus camaldulensis; Burkina Faso; Biology and Life Sciences; Technology and Engineering;

    Sammanfattning : The current use of pesticides in Burkina Faso has been described as problematic. An alternative to synthetically produced pesticides is products based on naturally occurring substances, e.g. from plants, so-called biopesticides. LÄS MER