Search for dissertations about: "Defense mechanism"

Showing result 21 - 25 of 284 swedish dissertations containing the words Defense mechanism.

  2. 21. Photospheric emission in gamma ray bursts : Analysis and interpretation of observations made by the Fermi gamma ray space telescope

    Author : Shabnam Iyyani; Felix Ryde; David Burrows; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; gamma ray bursts; photosphere; radiation mechanism; Theoretical Physics; teoretisk fysik;

    Abstract : The large flashes of radiation that are observed in GRBs are generally believed to arise in a relativistic jetted outflow. This thesis addresses the question of how and where in the jet this radiation is produced. READ MORE

  4. 22. Importance of tannins for responses of aspen to anthropogenic nitrogen enrichment

    Author : Franziska Bandau; Benedicte Albrectsen; Michael Gundale; Lisbeth Josson; Umeå universitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; aspen; foliar condensed tannins; genetic variability; anthropogenic nitrogen enrichment; plant growth; plant defense; litter decomposition; Populus tremula; asp; kondenserade tanniner; genetisk variabilitet; antropogent kväve; tillväxt; växtförsvar; förna nedbrytning; Populus tremula; Environmental Science; miljövetenskap; ekologisk botanik; Ecological Botany; Entomology; entomologi; Physiological Botany; fysiologisk botanik; Population Biology; populationsbiologi;

    Abstract : Boreal forests are often strongly nitrogen (N) limited. However, human activities are leading to increased N inputs into these ecosystems, through atmospheric N deposition and forest fertilization. READ MORE

  5. 23. Vibrio cholerae modulates the immune defense of human gut mucosa

    Author : Aziz Bitar; Marie-Louise Hammarström; Sun Nynt Wai; Mikael Rehn; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Vibrio cholerae; intestinal epithelial cell; duodenum biopsy; acute cholera; immunomodulation; microRNA; OMV; cytokine; T84 monolayer; miR-146; miR-155; VCC; PrtV; hemolysis; IL-8; TNF-a; IL-1b; IL-18; CCL20; IRAK2; inflammation; mikrobiologi; Microbiology; immunologi; Immunology;

    Abstract : The key function of innate immunity is to sense danger signals and initiate effective responses as a defense mechanism against pathogens. Simultaneously, effector responses must be regulated to avoid excessive inflammation with resulting tissue damage. READ MORE

  6. 24. Antimicrobial peptides and proteins in host-microbe interaction and immediate defense

    Author : Ylva Kai-Larsen; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Antimicrobial peptides and proteins (AMPs) are effector molecules of innate immunity and are capable to kill a broad spectrum of microbes, i.e. bacteria, fungi and viruses. They are widespread in nature and have been found in almost all species of the animal kingdom, as well as in plants. READ MORE

  7. 25. The role and mechanism of ubiquitin system in innate immune regulation

    Author : Swarupa Panda; Nelson O. Gekara; Fredrik Elgh; Anna Överby; Geert van Loo; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; The ubiquitin system; Deubiquitinase; MYSM1; Innate immune regulation Toll-like receptor; RIG-l like receptors; Cytoplasmic DNA receptors; NOD-like receptors; Francisella tularensis; Immune subversion; molekylärbiologi; Molecular Biology;

    Abstract : Pattern-recognition receptors (PRRs) include the cell surface or endosomal membrane localized Toll-like receptors (TLRs) and the cytoplasmic PRRs such as RIG-I-like receptors (RLRs), NOD-like receptors (NLRs) and cytoplasmic DNA receptors (CDRs). Triggering of PRRs culminates in the transcriptional induction of pro-inflammatory cytokines and type I interferons (IFNs) that coordinate protection against pathogens but require tight control to avert inflammatory diseases. READ MORE