Sökning: "nitrogen fixation"

Visar resultat 6 - 10 av 80 avhandlingar innehållade orden nitrogen fixation.

  1. 6. Nitrogen Losses from a Clay-rich Soil used for Cereal Production in south-western Sweden

    Författare :Magdalena Wallmann; Göteborgs universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; nitrogen; fertilisers; soil; nitrous oxide; nitrogen leaching; 15N; nitrogen use efficiency; nitrogen budget; agriculture; Sweden;

    Sammanfattning : Addition of fertiliser nitrogen (N) in crop production increases yields and protein contents, but all is not taken up by the crop. Instead, some of the N is lost to air and waters, contributing e.g. to climate change, stratospheric ozone depletion, eutrophication and acidification. LÄS MER

  3. 7. Regulation of nitrogen fixation in Rhodospirillum rubrum : Through proteomics and beyond

    Författare :Tiago Selao; Agneta Norén; Daniel Arp; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Rhodospirillum rubrum; nitrogen fixation; redox balance; switch-off; DRAT; Biochemistry; Biokemi; Biochemistry; biokemi;

    Sammanfattning : Adaptability is one of the reasons for the success of bacteria, allowing them to survive in conditions where no other organisms would be able to thrive. Nitrogen deficiency, for example, can be a limiting factor for the growth of micro-organisms, as this element is an essential part of almost all types of biomolecules. LÄS MER

  4. 8. Nitrogen fixation in the lichen Stereocaulon paschale

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

    Sammanfattning : 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. LÄS MER

  5. 9. Nitrogen metabolism in Gluconacetobacter diazotrophicus : studies on nitrogen fixation, ammonia assimilation and the nitrogen sensing system

    Författare :Alejandro Ureta; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : .... LÄS MER

  7. 10. Metabolic regulation of nitrogen fixation in Rhodospirillum rubrum

    Författare :He Wang; Stefan Nordlund; Patrick Hallenbeck; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Rhodospirillum rubrum; nitrogen fixation; switch-off; PII; AmtB1; DRAG; Biochemistry; Biokemi; Biochemistry; biokemi;

    Sammanfattning : Nitrogen, along with carbon, hydrogen and oxygen, is amongst the most abundant elements in all living cells. The capability to convert atmospheric dinitrogen to biologically usable nitrogen compounds is only found in some prokaryotes. LÄS MER