Search for dissertations about: "Per Bengtson"

Found 4 swedish dissertations containing the words Per Bengtson.

  2. 1. Microbial mobilization and immobilization of soil nitrogen

    Author : Per Bengtson; MEMEG; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; Ekologi; growth rate; microbial activity; respiration; assimilation; immobilization; Nitrogen; mineralization;

    Abstract : Microorganisms in forest ecosystems normally recycle nitrogen (N), such that gaseous losses and leaching are limited. Mobilization of organic N, including microbial N, and immobilization of inorganic N, especially NH4+, are the quantitatively most important N transformation processes. Various factors influence their rates, e.g. READ MORE

  4. 2. Carbohydrate dependent adhesion of leukocytes and the role of fucosyltransferase VII

    Author : Per Bengtson; Carl G. Galunberg; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Galectins, E-and P-selectins are carbohydrate-binding proteins that are up regulated at inflammatory lesions. Selectins expressed ou the activated endothelium mediate transient binding to leukocyte ligands that require sequential action of α 2,3-sialyltransferases and a 1,3-fucosyltransferases. READ MORE

  5. 3. Systematics and biogeography of the South African Metalasia clade (Asteraceae-Gnaphalieae)

    Author : Annika Bengtson; Per Ola Karis; Anthony Verboom; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; växtsystematik; Plant Systematics;

    Abstract : The Metalasia clade (Asteraceae–Gnaphalieae) consisting of the genera Metalasia, Atrichantha, Calotesta, Dolichothrix, Hydroidea, Lachnospermum, Phaenocoma, and Planea is endemic to South Africa with a main distribution within the Cape Floristic Region (CFR), a region known for its remarkable botanical diversity.The monophyly of the Metalasia clade, the relationships of its genera, and the circumscription of these as well as their position within the tribe Gnaphalieae is investigated using molecular data. READ MORE

  6. 4. High speed CMOS optical receiver

    Author : Håkan Bengtson; Linköpings universitet; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : Optical communication develops very fast and is today the main method for long distance wired communication. However cost is still high. Looking back to the evolution of optical transmission systems, one main objective of system development has become more and more important; minimize cost per gigabytes per second per kilometre, Gb/s/km. READ MORE