Search for dissertations about: "UDP"

Showing result 6 - 10 of 51 swedish dissertations containing the word UDP.

  2. 6. A Cross-Layer Perspective on Transport Protocol Performance in Wireless Networks

    Author : Stefan Alfredsson; Anna Brunström; Christer Åhlund; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wireless networks; 4G; cross-layer interaction; TCP; UDP; emulation; performance evaluation; optimizations; Computer Science; Datavetenskap;

    Abstract : Communication by wireless technologies has seen a tremendous growth in the last decades. Mobile phone technology and wireless broadband solutions are rapidly replacing the last-hop wireline connectivity for telephones and Internet access. READ MORE

  4. 7. Studies on the Role of UDP-Glucose Dehydrogenase in Polysaccharide Biosynthesis

    Author : Elisabet Roman; Marion Kusche-Gullberg; Hakon Leffler; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; UDP-glucose dehydrogenase; polysaccharide biosynthesis; glycosaminoglycan; A. thaliana; E. coli K5; Biokemi; Biochemistry; Biokemi; Medical and Physiological Chemistry; medicinsk och fysiologisk kemi;

    Abstract : Polysaccharides are found in all forms of life and serve diverse purposes. They are enzymatically synthesised from activated monosaccharide precursors, nucleotide sugars. One such nucleotide sugar is UDP-glucuronic acid, which is formed from UDP-glucose by the UDP-glucose dehydrogenase (UGDH) enzyme. READ MORE

  5. 8. Vascular effects of neuropeptides and UDP-β-S and alterations after stroke

    Author : André Erdling; Neurokirurgi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Abstract : The aim of this thesis is to investigate the changes in vasoactive intestinal peptide (VIP) and calcitonin gene-related peptide(CGRP) and P2Y6-mediated signaling following experimental subarachnoid hemorrhage (SAH) and transient middle cerebral artery occlusion (tMCAO). VIP and CGRP are among the most powerful vasodilators known to man while P2Y6 mediates strong vasoconstriction in cerebral blood vessels. READ MORE

  6. 9. Molecular consequences of cellular UDP-glucose deficiency

    Author : Juan Carlos Higuita V; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : A Chinese hamster fibroblast mutant cell line, deficient in UDP-glucose (UDPG), denoted as Qc, and its counterpart cell line with normalized levels of UDPG (G3), were used to determine some molecular consequences of chronic UDPG deficiency. The UDPG deficient cells lacked glycogen, had elevated rates of glucose uptake and a decreased capacity to synthesize glycogen after 120h of culture. READ MORE

  7. 10. Enzymes involved in heparan sulfate chain elongation : Function of a novel family of tumor suppressors?

    Author : Thomas Lind; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biochemistry; heparan sulfate; biosynthesis; glycosyltransferase; EXT1; EXT2; UDP-glucosedehydrogenase; KfiC; Biokemi; Biochemistry; Biokemi; Medical and Physiological Chemistry; medicinsk och fysiologisk kemi;

    Abstract : Heparan sulfate (HS) is a glycosaminoglycan associated with many physiological functions such as regulation of growth factor action and cell adhesion. The HS polysaccharide is synthesized by alternating addition of D-glucuronic acid (GlcA) and N-acetyl-D-glucosamine (GlcNAc) units from the corresponding UDP-sugar precursors. READ MORE