Sökning: "Anoxic"

Visar resultat 1 - 5 av 84 avhandlingar innehållade ordet Anoxic.

  1. 1. Studies of actinides in a superanoxic fjord

    Författare :Per Roos; Lund Medicinsk strålningsfysik; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Geology; colloids.; TIMS; pore water; remobilisation; sediments; ultrafiltration; uranium; thorium; americium; plutonium; Anoxic; Framvaren; fjord; physical geography; Geologi; fysisk geografi;

    Sammanfattning : Water column and sediment profiles of plutonium, americium, thorium and uranium have been obtained in the superanoxic Framvaren fjord, southern Norway. The concentrations of bomb test fallout Pu, Am as well as 'dissolved' Th in the bottom water are the highest recorded in the marine environment. LÄS MER

  3. 2. Anoxic degradation of organic matter in lakes : implications for carbon cycling and aquatic food webs

    Författare :David Bastviken; Joseph M Gasol; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ekonsystem i vatten; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : Considerable evidence from laboratory studies and marine environments suggests that degradation of organic matter (OM) is restricted under anoxic conditions compared to when molecular oxygen (O2) is present. However, other studies contradict this view since they found similar OM degradation rates and bacterial growth rates under both oxic and anoxic conditions in aquatic environments. LÄS MER

  4. 3. Mechanisms of failure and survival in the anoxic fish brain : With focus on the crucian carp

    Författare :Dan Johansson; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi; Biology; Biologi; limnologi; Limnology;

    Sammanfattning : Neural responses to anoxia were studied in two fish species, the rainbow trout(Oncorhynchus mykiss) and the crucian carp (Carassius carassius). The rainbow troutbrain reacted to anoxia by a massive release of excitatory amino acids and K+ into theextracellular compartment, in a fashion very much like the brain of mammals duringanoxia. LÄS MER

  5. 4. Development of a toxicity test for denitrification, using comamonas denitrificans

    Författare :Lena Gumaelius; KTH; []
    Nyckelord :denitrification; toxicity test; comamonas denitrificans; anoxic bioremediation; nitite reductase; biosensor; characterisation;

    Sammanfattning : .... LÄS MER

  7. 5. The importance of anaerobic ammonium oxidation (anammox) and anoxic nitrification for N removal in coastal marine sediments

    Författare :Pia Engström; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER