Sökning: "seaweed"

Visar resultat 21 - 25 av 42 avhandlingar innehållade ordet seaweed.

  1. 21. Patterns of evolution in a young species, the Baltic seaweed Fucus radicans

    Författare :Angelica Ardehed; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Marine biology; Evolution;

    Sammanfattning : To be able to interpret patterns of biodiversity it is important to understand the processes by which new species evolve and how closely related species remain reproductively isolated and ecologically differentiated. This thesis centers on the evolution of the two brown algae Fucus radicans and Fucus vesiculosus in the Baltic Sea, where Fucus radicans very recently diverged from F. LÄS MER

  3. 22. Two-Stage Conversion of Land and Marine Biomass for Biogas and Biohydrogen Production

    Författare :Valentine Nkemka; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steam pretreatment; dry digestion; biogas; biohydrogen; Caldicellulosiruptor saccharolyticus; cadmium; anaerobic digestion;

    Sammanfattning : The replacement of fossil fuels by renewable fuels such as biogas and biohydrogen will require efficient and economically competitive process technologies together with new kinds of biomass. A two-stage system for biogas production has several advantages over the widely used one-stage continuous stirred tank reactor (CSTR). LÄS MER

  4. 23. Seaweeds as a future protein source: innovative cultivation methods for protein production

    Författare :Kristoffer Stedt; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Macroalgae; Saccharina latissima; Ulva fenestrata; Ulva intestinalis; Chaetomorpha linum; Cultivation conditions; Nitrogen content; Amino acids; Heavy metals; Food safety; Wastewater; Process water; Circularity; Blue economy;

    Sammanfattning : As the global population is projected to reach approximately 10 billion people by 2050, it is estimated that we will need to produce up to 60% more food compared to 2010. Although the current food production system contributes to 25% of greenhouse gas emissions worldwide, accounts for 70-80% of eutrophication and freshwater usage, and occupies half of all ice- and desert-free land, it fails to meet the global nutritional needs. LÄS MER

  5. 24. Studies of Long-lived Radionuclides in the Environment - with Emphasis on 99Tc, 237Np and Pu Isotopes

    Författare :Patric Lindahl; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nuclear medicine; radiobiology; Nukleärmedicin; radiobiologi; atomic ratio; environmental samples; nuclear weapons fallout; Chernobyl fallout; bioindicators; activated carbon; Sellafield; plutonium; neptunium; ICP-MS; technetium;

    Sammanfattning : Studies of the long-lived anthropogenic radionuclides 99Tc, 237Np, 239Pu and 240Pu were performed in marine and terrestrial areas contaminated by different accidental and controlled releases of radioactive materials. The three main sources discussed in this thesis are nuclear weapons tests, nuclear reprocessing plants and the Chernobyl accident. LÄS MER

  7. 25. Sea cages, seaweeds and seascapes : Causes and consequences of spatial links between aquaculture and ecosystems

    Författare :Nils Hedberg; Tedengren Michael; Nils Kautsky; Barry Costa-Pierce; Stockholms universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Spatial links; Aquaculture; Coral Reefs; Seagrass; Seascape; marin ekotoxikologi; Marine Ecotoxicology;

    Sammanfattning : Aquaculture is of growing importance in the global seafood production. The environmental impact of aquaculture will largely depend on the type of environment in which the aquaculture system is placed. LÄS MER