Sökning: "free oxygen radicals"

Visar resultat 11 - 15 av 63 avhandlingar innehållade orden free oxygen radicals.

  1. 11. Human eosinophils and their activation by allergens via danger signal receptors

    Författare :Elin Redvall; Göteborgs universitet; []
    Nyckelord :human eosinophils; danger signals; allergen; formyl peptide receptors; CCR3; chemotaxis; degranulation; free oxygen radicals; receptor desensitization;

    Sammanfattning : Human eosinophilic granulocytes are polymorphonuclear cells with a powerful arsenal of cytotoxic substances in their granules, which are mainly found in the gastrointestinal mucosa, and the respiratory and genitourinary tracts. Their physiological role is incompletely understood, although it is likely they protect the mucosal surfaces, perhaps by recognizing danger signals present on microorganisms or released from damaged tissue. LÄS MER

  3. 12. Iron-nitrogen containing carbon catalysts for oxygen reduction in fuel cells

    Författare :Caroline Janson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; active site; mesoporous carbon; fuel cell; electron paramagnetic resonance; oxygen reduction reaction; cathode catalyst; non-precious metal catalyst;

    Sammanfattning : New solutions to efficiently convert energy are needed to mitigate global climate changes and sustain the needs of the growing population. An energy device with high potential is the proton exchange membrane (PEM) fuel cell. PEM fuel cells can convert chemical energy to electrical energy with extraordinary high conversion efficiency. LÄS MER

  4. 13. The role of reactive oxygen species in traumatic brain injury : Experimental studies in the rat

    Författare :Niklas Marklund; Uppsala universitet; []
    Nyckelord :Medical sciences; Apoptosis; CBF; controlled cortical contusion injury; 3; 4-dihydroxybenzoate; fluid percussion injury; glucose; 4-hydroxybenzoate; microdialysis; Morris Water Maze; neuroprotection; nitrones; PBN; rat; reactive oxygen species ROS ; salicylate; S-PBN; TBI; MEDICIN OCH VÅRD; MEDICINE; MEDICIN; Neurosurgery; neurokirurgi;

    Sammanfattning : Traumatic brain injury (TBI) is a major cause of mortality and disability. As common sequelae in survivors of TBI are disabling functional, emotional and cognitive disturbances, improved treatment of TBI patients is urgently needed. At present, no neuroprotective pharmacological treatment exists. LÄS MER

  5. 14. Thiyl radicals, reaction kinetics and redox chemistry

    Författare :Rong Zhao; KTH; []
    Nyckelord :;

    Sammanfattning : In focusing on the free radical chemistry of thiyl radicals,two importantclasses are dealt with, namely, the amino acidalkylthiyl and the acylthiyl radicals, where pulse radiolysisand steady state γ-radiolysis are applied.Amino acid thiyl radicals (RS•), are important in manybiological systems,as intermediates in the repair reactions ofthiols towards targeted carbon-centeredradicals and ascatalytic centers in many enzymatic reactions. LÄS MER

  7. 15. Innate and acquired immunity to herpes simplex virus type 2 glycoprotein G in humans

    Författare :Lars Bellner; Göteborgs universitet; []
    Nyckelord :herpes simplex virus type 2; glycoprotein G-2; T-cell proliferation; Th1 cytokines; phagocytes; NK cells; reactive oxygen species; formyl peptide receptors;

    Sammanfattning : Herpes simplex virus type 2 (HSV-2) is a sexually transmitted pathogen that infects the human genital tract mucosa and is the most common cause of genital ulcer disease in humans. The infection exhibits a broad clinical spectrum, ranging from severe recurrent episodes of genital herpes to being completely asymptomatic. LÄS MER