Sökning: "anoxia"

Visar resultat 1 - 5 av 21 avhandlingar innehållade ordet anoxia.

  1. 1. Control factors of the marine nitrogen cycle : The role of meiofauna, macrofauna, oxygen and aggregates

    Författare :Stefano Bonaglia; Patrick Crill; Volker Brüchert; Per Hall; Chritoph Humborg; Risgaard-Petersen Nils; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nitrogen cycle; denitrification; DNRA; anammox; anoxia; hypoxia; eutrophication; meiofauna; macrofauna; aggregates; cyanobacteria; Baltic Sea; geokemi; Geochemistry;

    Sammanfattning : The ocean is the most extended biome present on our planet. Recent decades have seen a dramatic increase in the number and gravity of threats impacting the ocean, including discharge of pollutants, cultural eutrophication and spread of alien species. LÄS MER

  3. 2. Phosphorus recycling in brackish and marine environments - Sediment investigations in situ in the Baltic Sea and the By Fjord

    Författare :Lena Viktorsson; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; phosphorus; sediment; anoxia; Baltic Sea; By Fjord; benthic flux;

    Sammanfattning : The phosphorus load to the oceans from land started to increase since around 1950 when man started to mine phosphorus-mineral from phosphorus-rich soils and bedrock. The increased use of phosphorus fertilizers in agriculture together with the growth of coastal cities increased the load of phosphorus to the coastal ocean where plankton production flourished. LÄS MER

  4. 3. Glutathione in the brain. Studies on efflux and possible implications in neurotoxicity

    Författare :Camilla Wallin; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Glutathione; excitotoxicity; hypoxia-ischemia; brain; rat; anoxia-aglycemia; g-glutamyl transpeptidase; glutamate; NMDA; oxidative stress; mitochondria; amino acids;

    Sammanfattning : Neuronal cell death in acute insults such as stroke, trauma and epilepsy involves overactivation of glutamate receptors, calcium influx and increased formation of potentially toxic reactive oxygen species. Glutathione is a key component in the antioxidant defense system against reactive oxygen species. LÄS MER

  5. 4. Genetically Engineered Plants: Improved stress tolerance, growth and facilitated protein purification

    Författare :Gösta Lilius; Tillämpad biokemi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; glycine betaine; gene; freezing; flooding; drought; dicoteledones; desiccation; compatible solutes; cold; choline dehydrogenase; chill; CDH; betaine; betA; alkaloids anoxia; affinity purification; affinity tags; handles; hemoglobin; hypoxia; low temperatu; Biotechnology; Bioteknik;

    Sammanfattning : Heterologous genes were expressed in plants in which the overall goal was to increase the value of the final crop. Various aspects were explored and evaluated, such as improving the stress tolerance, enhancing the availability of oxygen in growing cells and producing rare proteins with increased degrees of purity. LÄS MER

  7. 5. Diabetic neuropathy clinical and experimental studies

    Författare :Per Lindström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :diabetes mellitus; neuropathy; ischaemia; sensibility; thermal sensibility; quantitative sensory testing; mammalian nerve; ouabain; osteopenia; neurophysiology; peripheral nerve; anoxia.;

    Sammanfattning : A classification of impaired thermal sensibility is proposed, reflecting the severity of diabetic polyneuropathy in terms of its regional extension. The classification may be a useful tool in cross-sectional and long-term studies of patients with diabetes mellitus. LÄS MER