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Showing result 1 - 5 of 95 swedish dissertations matching the above criteria.

  2. 1. Inflammatory mechansims in pulmonary sarcoidosis

    Author : Mary Berlin; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Adhesion molecules; alveolitis; bronchoalveolar lavage; bronchial hyperreactivity; extracellular matrix molecules; extrinsic allergic alveolitis; fibrosis; HLA-DR; sarcoidosis; TCR;

    Abstract : Pulmonary sarcoidosis is an inflammatory disorder of unknown aetiology, characterised by an accumulation of CD4+ T-cells in the alveolar compartment and by granuloma formation and varying degrees of interstitial fibrosis. The initial clinical presentation may either be acute with fever, malaise, arthritis and/or erythema nodosum or insidious with cough, dyspnea, tiredness, and loss of weight. READ MORE

  4. 2. Urea and Non-Protein Nitrogen Metabolism in Infants : With Special Reference to the Sudden Infant Death Syndrome (SIDS)

    Author : Mary George; Sten Lindahl; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; Urea; non-protein nitrogen metabolism; SIDS; drinking water nitrate concentration; carbon dioxide production; Kirurgi; Surgery; Kirurgi; anestesiologi; Anaesthesiology;

    Abstract : A large amount of non-protein nitrogen, in the form of urea and ammonium, is present in human breastmilk; however its physiological role in the infant is as yet not fully understood. It has been hypothesized that an insufficient enteric metabolism of urea could play a role in the sudden infant death syndrome (SIDS). READ MORE

  5. 3. Costs of foraging in a dry tropical environment

    Author : Mary Molokwu; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; foraging behavior; seasonality; predation risk; granivorous birds; food availability; water; temperature; savannah; dry tropics; energy; secondary compounds; diet selection;

    Abstract : This study evaluates the costs associated with foraging for birds in a savannah woodland area in central Nigeria. Specifically, it looks at the following questions: 1) how does seasonal variability in food and water availability affect the value of resources to birds in dry environments? 2) Does proximity to water affect foraging decisions? What implication will this have in the management of savannah birds? 3) Are tropical birds mostly affected by metabolic or predation costs? 4) What factors affect diet selection in birds and how? 5) How are birds adapted to hot dry environments? I carried out experiments in the field and in an aviary and provided artificial food patches, consisting of feeding trays with seeds mixed in sand or pebbles (in the aviary study). READ MORE

  6. 4. Quality assurance for magnetic resonance imaging (MRI) in radiotherapy

    Author : Mary Adjeiwaah; Tufve Nyholm; Rob HN Tijssen; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Magnetic resonance imaging; Radiotherapy; geometric distortions; patient-induced susceptibilities MR-only; radiofysik; radiation physics;

    Abstract : Magnetic resonance imaging (MRI) utilizes the magnetic properties of tissues to generate image-forming signals. MRI has exquisite soft-tissue contrast and since tumors are mainly soft-tissues, it offers improved delineation of the target volume and nearby organs at risk. READ MORE

  7. 5. Quality assurance for magnetic resonance imaging (MRI) in radiotherapy

    Author : Mary Adjeiwaah; Tufve Nyholm; Anders Garpebring; Joakim Jonsson; Sofie Ceberg; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; magnetic resonance imaging; MRI; radiotherapy; RT; geometric distortions; magnetic susceptibility; B0 maps; quality assurance; radiofysik; radiation physics;

    Abstract : The use of Magnetic Resonance Imaging (MRI) in the radiotherapy (RT) treatment planning workflow is increasing. MRI offers superior soft-tissue contrast compared to Computed Tomography (CT) and therefore improves the accuracy in target volume definitions. READ MORE