Search for dissertations about: "nitrogenase"

Showing result 16 - 20 of 37 swedish dissertations containing the word nitrogenase.

  2. 16. Studies on the nitrogenase system of the photosynthetic bacterium Rhodospirillum rubrum

    Author : Stefan Nordlund; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : .... READ MORE

  4. 17. Cell structure and localisation of nitrogenase in some marine and brackish cyanobacteria

    Author : Sven Janson; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Brackvatten; Cyanobakterier;

    Abstract : .... READ MORE

  5. 18. Ammonia assimilation and nitrogen fixation in phototrophic bacteria : studies on glutamine synthease and the metabolic regulation of nitrogenase in Rhodospirillum rubrum

    Author : Abdelhamid Soliman; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : The phototrophic bacteria and a few other species, are able to control nitrogen fixation on the metabolic level. This is a fast and reversible mechanism, which “switches off and on” the nitrogenase activity in response to the accessibility of combined nitrogen, the energy supply and the level of oxygen in the medium. READ MORE

  6. 19. Nitrogen fixation in the lichen Stereocaulon paschale

    Author : Kerstin Huss-Danell; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nitrogen fixation; lichen; acetylene reduction; environmental factors; physiological condition; pine forest; Sweden;

    Abstract : The thesis is a summary and discussion of six papers.The purpose of the investigation was to study the influence of (i) environmental factors and (ii) the physiological condition of the thallus on nitrogen fixation in the lichen Stereocaulon paschale (L.) Fr. READ MORE

  7. 20. Developmental patterns in the Nostoc-Gunnera symbiosis

    Author : Erik Söderbäck; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : Gunneraceae is an angiosperm family comprising about 60 species scattered in the southern hemisphere. All members of the family develop a nitrogen-fixing symbiosis with intracellularly located Nostoc. The aim of the present study was to characterize the symbiosis, structurally and physiologically, with emphasis on G. magellanica and G. READ MORE