Sökning: "Lichen"

Visar resultat 1 - 5 av 59 avhandlingar innehållade ordet Lichen.

  1. 1. The puzzle of lichen symbiosis Pieces from Thamnolia

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ioana Onuț-Brännström; Uppsala universitet.; [2017]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Thamnolia; lichen; symbiosis; photobiont; mycobiont; phylogeography; MAT-loci; barcoding; NGS; genome; transcriptome; Ice Age; Biology with specialization in Systematics; Biologi med inriktning mot systematik;

    Sammanfattning : Symbiosis brought important evolutionary novelties to life on Earth. Lichens, the symbiotic entities formed by fungi, photosynthetic organisms and bacteria, represent an example of a successful adaptation in surviving hostile environments. Yet many aspects of the lichen symbiosis remain unexplored. LÄS MER

  2. 2. Oral lichen planus studies of factors involved in differentiation, epithelial mesenchymal transition and inflammation

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Karin Danielsson; Umeå universitet.; Umeå universitet.; [2012]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; oral lichen planus; differentiation; inflammation; autoimmune; premalign; odontologi; Odontology; patologi; Pathology;

    Sammanfattning : Background: Lichen planus is a chronic inflammation of skin and mucosa with unknown cause. Oral Lichen Planus, OLP, affects around 2% of the population. Autoimmunity has been suggested as a possible cause as the disease has autoimmune features such as female predominance, cyclic nature and cytotoxic T-cell infiltrate. LÄS MER

  3. 3. Nitrogen fixation in the lichen Stereocaulon paschale

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Kerstin Huss-Danell; Umeå universitet.; [1979]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nitrogen fixation; lichen; acetylene reduction; environmental factors; physiological condition; pine forest; Sweden;

    Sammanfattning : The thesis is a summary and discussion of six papers.The purpose of the investigation was to study the influence of (i) environmental factors and (ii) the physiological condition of the thallus on nitrogen fixation in the lichen Stereocaulon paschale (L.) Fr. LÄS MER

  4. 4. Modeling lichen performance in relation to climate scaling from thalli to landscapes

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Anna V Jonsson Čabrajić; Umeå universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lichen; growth; model; micro-climate; hydration; activation; photosynthesis; respiration; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology Terrestrial ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi Terrestisk ekologi; ekologisk botanik; Ecological Botany;

    Sammanfattning : Lichens can colonize nearly all terrestrial habitats on earth and are functionally important in many ecosystems. Being poikilohydric, their active growth periods are restricted to periods when the thallus is hydrated from atmospheric water sources, such as rain, fog and high relative humidity. LÄS MER

  5. 5. Temperature effects on UV-B induced DNA damage and repair in plants and a lichen

    Detta är en avhandling från Markus Paulsson, Sölvegatan 35, SE-223 62 Lund, Sweden

    Författare :Markus Paulsson; Lund University.; Lunds universitet.; [2003]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tobacco Nicotiana tabacum ; Temperature; Subarctic; Plants; Photoreactivation; Photolyase; Lichen; DNA damage; Cyclobutane pyrimidine dimers CPD ; 6-4 Photoproducts; Cladonia arbuscula ssp. mitis; Ultraviolet radiation; UV-B; Vaccinium vitis-idaea; Plant genetics; Växtgenetik;

    Sammanfattning : All living organisms have DNA and since DNA is essential to life it must be repaired when damaged. UV radiation is one of the major DNA damaging agents, which photosynthetic organisms cannot avoid. LÄS MER