Sökning: "extracellular amino acids."

Visar resultat 1 - 5 av 56 avhandlingar innehållade orden extracellular amino acids..

  1. 1. Monitoring of extracellular substances after spontaneous and experimental subarachnoid hemorrhage

    Författare :Magnus Runnerstam; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Subarachnoid hemorrhage; Microdialysis; Amino acids; GFAP; Iron; Apoptosis;

    Sammanfattning : Even though survival is considerably enhanced after surgical treatment of an aneurysmal subarachnoid hemorrhage (SAH), there is a critical period, which keeps the patient in intensive care for days or even weeks. Complications, such as vasospasm, ischemia and brain edema ultimately lead to further brain damage. LÄS MER

  3. 2. Utilization of terrestrially derived dissolved organic nitrogen by aquatic bacteria

    Författare :Ramunas Stepanauskas; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; amino acids; spring flood; UV radiation; estuarine mixing; microbial loop; bacterial bioassays; marine eutrophication; bioavailability; Dissolved organic nitrogen; DON; extracellular aminopeptidase; Baltic Sea; Hydrobiology; marine biology; aquatic ecology; limnology; Marinbiologi; limnologi; akvatisk ekologi;

    Sammanfattning : I investigated the bacterial utilization of terrestrially derived dissolved organic nitrogen (DON) in aquatic ecosystems, and assessed the potential role of river-born DON in marine eutrophication. To determine the bioavailability of DON, I developed a bioassay employing N-limited bacterial regrowth cultures, which were calibrated with additions of inorganic nitrogen. LÄS MER

  4. 3. Molecular mechanisms and biological consequences of the production of non-canonical D-amino acids in bacteria

    Författare :Alena Aliashkevich; Felipe Cava; Fredrik Almqvist; Andrew J Roe; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bacteria; cell wall; peptidoglycan; D-amino acids; LD-transpeptidase;

    Sammanfattning : Most bacteria possess a vital net-like macromolecule – peptidoglycan (PG). PG encases bacteria around the cytoplasmic membrane to withstand the high internal turgor pressure and thereby protect the cell from bursting. In addition, PG is a major morphological determinant of bacteria being both required and sufficient to maintain cell shape. LÄS MER

  5. 4. Physiology of Escherichia coli in batch and fed-batch cultures with special emphasis on amino acid and glucose metabolism

    Författare :Ling Han; KTH; []
    Nyckelord :escherichia coli; amino acids; glycine; quorum sensing; metabolic switch; metabolite po9ols; carbon balance; outer membrne; lipopolysaccharide; batch culture;

    Sammanfattning : The objective of this work is to better understand themetabolism and physiology ofEscherichiacoli(W3110) in defined medium cultures with thelong-term goal of improving cell yield and recombinant proteinproductivity.The order of amino acid utilization inE. colibatch cultures was investigated in a medium with16 amino acids and glucose. LÄS MER

  7. 5. Genetic and biochemical characterization of a novel sensor of extracellular amino acids in yeast

    Författare :Hanna Forsberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Eukaryotic cells make developmental decisions that initiate distinct programs of gene expression. In the yeast Saccharomyces cerevisiae the majority of decisions affecting developmental outcomes are made in response to extra- and intracellular derived nutritional signals. LÄS MER