Sökning: "Euglena gracilis"

Hittade 2 avhandlingar innehållade orden Euglena gracilis.

  1. 1. The surface complex of Euglena gracilis. Involvement in cellular movements and biochemical and molecular analyses of the components

    Författare :Silja K Petersen-Mahrt; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UV-B radiation; tubulin; surface complex; plasma membrane; phylogeny; phototaxis; nitrogen deficiency; membrane skeleton; Euglena gracilis; actin; cell shape; Physiological biophysics; Växtfysiologi;

    Sammanfattning : The flagellate Euglena gracilis shows rhythms in phototaxis and cell shape changes between oblong and round. Artificial UV-B radiation of 0.5 W m-2 caused a loss in phototaxis, but the peak of activity occurred at the same time as for control cells. LÄS MER

  3. 2. Effects of wood ash on freshwater organisms and aquatic forest ecosystems

    Författare :K. Andreas Aronsson; Nils Ekelund; Thomas Palo; Olli-Pekka Penttinen; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Wood ash; Euglena gracilis; Gammarus pulex; Fontinalis antipyretica; pH; alkalinity; toxicity; nutrients; first order stream; Askåterföring; Vedaska; Akvatiska näringssystem; Mineralnäring; Biology; Biologi;

    Sammanfattning : Wood ash application (WAA) has been recommended mainly for two reasons; i) to avoid depletion of minerals in the soil due to whole tree harvest in the forestry and ii) to mitigate harmful effects of acidification of soil and surface waters. In conclusion, the effects on terrestrial ecosystems and, especially, tree growth, can be attributed to the properties of the ash, the dose applied and the specific site at which the ash is applied. LÄS MER