Sökning: "oxygen availability"

Visar resultat 11 - 15 av 88 avhandlingar innehållade orden oxygen availability.

  1. 11. Seagrass Respiration : An assessment of oxygen consumption patterns of temperate marine macrophytes

    Författare :Lina M. Rasmusson; Mats Björk; Martin Gullström; Katharina Pawlowski; Jonas Collén; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mitochondrial respiration; Photorespiration; Seagrass productivity; Zostera marina; Marine carbon budgets; Ruppia maritima; Ulva intestinalis; Plant Physiology; växtfysiologi;

    Sammanfattning : In coastal seas, the abundance of marine macrophytes has profound influence on the flows of oxygen and inorganic carbon through the water. Vast amounts of carbon dioxide are taken up by photosynthesis and part of this is respired back into the water column. LÄS MER

  3. 12. Oxygen sensing in myeloid cells : implications for physiology and cancer

    Författare :Miloš Gojković; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : All mammals depend on oxygen in order to produce life-essential energy. They acquire oxygen (O2) through inspiration. In the lungs, O2 is gathered by erythrocytes that consequently deliver it to all cells by the cardiovascular system. O2 levels vary within our bodies. LÄS MER

  4. 13. Disturbed Islet Function and Alterations in Islet Protein Expression

    Författare :Henrik Ortsäter; Peter Bergsten; Franz Schuit; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Cell biology; islet; glucose; oleate; corticosterone; oxygen tension; insulin release; protein profiling; Clark-like electrodes; SELDI-TOF MS; PPI-B; 11β-HSD1; Cellbiologi; Cell biology; Cellbiologi;

    Sammanfattning : Pancreatic β-cells sense the concentration of glucose in the systemic circulation through metabolism of the sugar molecule. Failure to correlate the blood sugar concentration to an appropriate metabolic signal disrupts the function of the β-cell as a controller of glucose homeostasis and may contribute to the development of type 2 diabetes mellitus. LÄS MER

  5. 14. Oxygen-dependent regulation of transcription by the hypoxia-inducible factor-1

    Författare :Jorge Lira Ruas; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Hypoxia; HIF-1; protein degradation; transcription; coactivators; CBP; subcellular localization; C1-tetrahydrofolate synthase;

    Sammanfattning : Under limited oxygen availability (hypoxia) cells undergo rapid reprogramming in order to survive in the new environment until normoxic conditions are re-established. The observation that hypoxia can induce the expression of genes involved in erythropoiesis, angiogenesis and glucose metabolism among others, led to the identification of the hypoxia-inducible factor-1 (HIF-1) as a master regulator of the hypoxia-response pathway. LÄS MER

  7. 15. Bacterial Adaptive Responses - Coping with Oxygen Limitation, Reactive Nitrogen Species and Disulfide Stress

    Författare :Annika Rogstam; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bacillus subtilis; redox regulation; nitrosative stress; disulfide stress;

    Sammanfattning : Bacteria have a remarkable ability to adapt to different environments. When bacteria encounter stress that causes macromolecular damage in the cell, leading to a suboptimal performance of cell metabolism, they can elicit an adaptive response. LÄS MER