Sökning: "alg"

Visar resultat 1 - 5 av 6 avhandlingar innehållade ordet alg.

  1. 1. Epiphytic lichen responses to nitrogen deposition

    Författare :Otilia Johansson; Kristin Palmqvist; Johan Olofsson; Annika Nordin; Lars E Ericson; Peter Crittenden; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Lichens; air pollution; nitrogen deposition; phosphorus; growth; chlorophyll a; boreal forest; field experiment; irrigation; carbon based secondary compounds; Lavar; luftföroreningar; alg; svamp; kväve; fosfor; skog; Terrestrial ecology; Terrestrisk ekologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Nitrogen (N) deposition has increased globally over the last 150 years and further increase is predicted for the future. Nitrogen is an important nutrient for lichens, involved in many processes in both photobiont and mycobiont.  However, N can be a stressor, causing many lichens and lichen communities to disappear with increased deposition. LÄS MER

  2. 2. In vitro studies of natural and tumor-associated immunity in patients with transitional cell carcinoma of the urinary bladder

    Författare :Marita Troye-Blomberg; Stockholms universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES;

    Sammanfattning : Peripheral blood lymphocytes (PBL) from patients with transitional cell carcinoma of the urinary bladder (TCC-bladder) were studied using a SlCr-release assay for their in vitro cytotoxicity against a panel of allogeneic tissue culture cell lines of TCC-bladder and other origins. Control PBL were obtained from four different groups of donors. LÄS MER

  3. 3. Effects of warming on the green alga Cladophora glomerata : Ecological and genetic responses

    Författare :Jenny Zie; Pauline Snoeijs; Mats Grahn; Anna Godhe; Stockholms universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; AFLP; Baltic Sea; Cladophora glomerata; climate change; community ecology; genome scan; global warming; selection; Marine Ecology; marin ekologi;

    Sammanfattning : Since the beginning of the 20th century, average global surface temperature has increased ~0.7 °C and the current scenarios predict that it will continue to rise additional 2-4 °C during the 21st century. LÄS MER

  4. 4. Plankton communities in a changing world - responses to temperature, brownification and lake restoration

    Författare :Mattias Ekvall; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Climate change; temperature; warming; brownification; biomanipulation; zooplankton; cyanobacteria; microcystin; grazing; Daphnia;

    Sammanfattning : The effects of increasing temperatures, in light of climate change, have been a well-studied topic during the past decades. However, aquatic ecosystems are also faced with additional challenges such as increasing water colour, known as “brownification”. LÄS MER

  5. 5. Regulation of PDGFRβ signaling 

    Författare :Piotr Wardęga; Johan Lennartsson; Edvard Smith; Uppsala universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; PDGF; HD-PTP; Alix; Cbl; Ub; Fer; Y857; Y771; downregulation; degradation; ubiquitination; activation loop; Cell and molecular biology; Cell- och molekylärbiologi; Medical Cell Biology; Medicinsk cellbiologi;

    Sammanfattning : Platelet-derived growth factor (PDGF) isoforms, which bind to closely related a- and b-tyrosine kinase receptors, induce migration, proliferation, survival and differentiation of mesenchymal cells. They signal by the active receptor attracting Src homology 2 (SH2) domain containing proteins, which subsequently initiate a set of signaling pathways. LÄS MER