Sökning: "free oxygen radicals"

Visar resultat 1 - 5 av 63 avhandlingar innehållade orden free oxygen radicals.

  1. 1. Free radicals in cellular pathology : Mechanisms behind lipofucin formation in cultured myocardial cells

    Författare :Rasi Marzabadi Massoud; Linköpings universitet; []
    Nyckelord :MEDICINE; MEDICIN;

    Sammanfattning : Lipofuscin, or age pigment, may be defined as a yellowish-brown,autofluorescent, protein and lipid containing pigment that accumulates inthe lysosomal vacuome of a variety of post-mitotic cell types in man andanimals during aging. Lipofuscin is the end product of peroxidation,fragmentation and polymerization of proteins and lipids. LÄS MER

  3. 2. Free radical mediated cellulose degradation

    Författare :Erik Johansson; KTH; []
    Nyckelord :free radicals; cellulose; polymer; average chain length; bleaching; TCF; ozone; degradation;

    Sammanfattning : This thesis addresses the mechanisms involved in cellulosedegradation in general and Totally Chlorine Free (TCF) bleachingof pulp in particular. The thesis shows that the cellulosedegradation during high consistency ozone bleaching is explainedby free radical chain reactions. LÄS MER

  4. 3. Mitochondrial function in human skeletal muscle: with special reference to exercise and training

    Författare :Michail Tonkonogi; Högskolan Dalarna; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :aerobic metabolism; oxidative phosphorylation; mitochondria; oxygen utilisation; citrate synthase; ADP sensitivity; ATP; muscle fibres; hydrogen ions; lactate; free radicals; proton leak; uncoupling; exercise; aerobic metabolism; oxidative phosphorylation; mitochondria; oxygen utilisation; citrate synthase; ADP sensitivity; ATP; muscle fibres; hydrogen ions; lactate; free radicals; proton leak; uncoupling; exercise;

    Sammanfattning : The overall objective of this thesis was to study the adaptation of oxidative function in human skeletal muscle to acute exercise of different modes, intensities and durations, and to endurance training. The effects of endurance training on mitochondrial function were evaluated in cross-sectional and longitudinal studies by measurements of mitochondrial oxygen consumption in isolated mitochondria and permeabilised muscle fibres and measurements of mitochondrial ATP production rate in isolated mitochondria. LÄS MER

  5. 4. Effects of Th-1 and Th-2 Cytokines and Reactive Oxygen Species on Normal Human Bronchial Epithelial Cells

    Författare :Caroline Kampf; Benjamin Gaston; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cell biology; ytokines; desmosomes; focal adhesions; free radicals; hypochlorous acid; nitric oxide; normal human bronchial epithelial cells; Cellbiologi; Cell biology; Cellbiologi; medicinsk cellbiologi; Medical Cell Biology;

    Sammanfattning : Epithelial damage and shedding of the epithelium are common observations in many airway diseases such as asthma, Sjögren’s syndrome, chronic obstructive pulmonary disease and cystic fibrosis. The ability of the cells to attach to each other and/or to the matrix seems to be altered. LÄS MER

  7. 5. The involvement of calcium and membrane fusion events in neutrophil secretion and respiratory burst

    Författare :Daniel Granfeldt; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; neutrophils; calcium; regulated secretion; membrane fusion; SOC; arachidonic acid; intracellular fusion; oxygen free radicals; phagocytosis;

    Sammanfattning : Neutrophil granulocytes play an important role in host defence during the early stages of microbial infection. The neutrophils have to leave the blood stream and migrate out into the tissue where they are able to phagocytose and kill microbes as well as dispose of cell debris from damaged tissues. LÄS MER