Search for dissertations about: "spp"
Showing result 1 - 5 of 232 swedish dissertations containing the word spp.
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1. Kleptoplasty in Dinophysis spp : Ecological role and evolutionary implications
Abstract : This thesis deals with the question of whether planktonic protits of the genus Dinophysis have permanent plastids (=chloroplasts) or practice kleptoplasty, i.e. acquire plastids via predation on other microorganisms. Sequencing the plastid 16S rDNA of Dinophysis spp. READ MORE
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2. Late Holocene humidity variability in central Sweden
Abstract : The aim of this thesis was to reconstruct humidity variability in central Sweden during the late Holocene. A multi-proxy approach was used to infer humidity changes as recorded in a lake and a mire. Age-models were constructed based on radiocarbon dating and the Askja-1875 tephra. READ MORE
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3. Microstructure of Zirconium Alloys Oxidized in Steam
Abstract : Zirconium alloys are widely used in nuclear reactors as fuel cladding tubes because of their low thermal neutron capture cross-section, good corrosion properties and satisfactory mechanical properties. However, the main limiting factor of these materials is the oxidation behavior. READ MORE
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4. The Scents of Nature : Identification and Synthesis of Bioactive Compounds Used in Insect Communication
Abstract : Pest insects cause great financial losses in the forest and food industry every year. To fight these pests industries have used insecticides, which are sometimes harmful to nature and humans. READ MORE
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5. Modified oxygen and hydrogen transport in Zr-based oxides
Abstract : Most metals and alloys in the presence of oxygen and moisture will instantaneously react and form a thin (2-5 nm) surface oxide layer. For further reaction to occur, oxygen ions and/or metal cations often diffuse through the already formed oxide layer. READ MORE