Avancerad sökning

Hittade 3 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. New directions in non-porous membrane extraction

    Författare :Eddie Thordarson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extracting syringe; solvent-free; miniaturisation; micro-porous membrane liquid-liquid extraction; polymeric membrane extraction; Non-porous membrane extraction; supported liquid extraction; integration; automation; Analytical chemistry; Analytisk kemi;

    Sammanfattning : Complex biological and environmental samples require a high degree of selectivity in order to determine components therein. Sensitivity measures, such as analyte pre-concentration are often required for assessing composition quantitatively. LÄS MER

  3. 2. Airborne nitric oxide : inflammatory marker and aerocrine messenger in man

    Författare :Jon Lundberg; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :ARDS; asthma; cystic fibrosis; cystitis; exhaled air; inflammatory bowel disease; inhaled nitric oxide; Kartagener s syndrome; nitric oxide synthase; sinusitis; ;

    Sammanfattning : We have used a chemiluminescence technique to measure gaseous nitric oxide (NO) directly in hollow organs of humans. NO production was studied in the airways of healthy controls and patients with chronic inflammatory airway disease, in the stomach of healthy subjects, in the colon of patients with inflammatory bowel disease, and in the urinary bladder of patients with cystitis. LÄS MER

  4. 3. Metapopulation ecology of Osmoderma eremita - dispersal, habitat quality and habitat history

    Författare :Jonas Hedin; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; extinction debt; habitat history; habitat quality; pheromone; telemetry; capture-mark-recapture; metapopulation; dispersal; oak; Osmoderma eremita; beetle; Animal ecology; Djurekologi;

    Sammanfattning : This thesis starts with a review of different biodiversity assessment methods in forests and the rest deals with the metapopulation ecology of Osmoderma eremita, a threatened beetle living in hollow trees. I concentrate on the effect of dispersal, habitat quality and habitat history for the presence, population size and future survival of this species. LÄS MER