Sökning: " lichens"

Visar resultat 16 - 20 av 63 avhandlingar innehållade ordet  lichens.

1. 16. Clinical aspect of laser treatment of lichen sclerosus and squamous cell carcinoma of the penis

   Författare :Torgny Windahl; Jan-Erik Johansson; Peter Ekman; Örebro universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Medicin; Penile diseases; lichens; penile neoplasms; lasers; carcinoma; squamous cell carcinoma; sexual function; sexaul satisfaction; medicin; Dermatology and venerology; clinical genetics; internal medicine; Dermatologi och venerologi; klinisk genetik; invärtesmedicin; Medicine; Medicin;

   Sammanfattning : The aim of these studies was to investigate the efficacy, complications and the long term results after laser treatment of lichen sclerosus et atrophicus and of squamous cell carcinoma of the penis.Patients and Methods: Paper I: In a prospective study from 1985-1991, 62 men with histologically verified lichen sclerosus et atrophicus were given carbon dioxide (CO2) laser treatment following the failure of local corticosteroid treatment. LÄS MER

3. 17. Resource aquisition and allocation in lichens

   Författare :Lena Dahlman; David Richardson; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Amino acid; Arginine; carbohydrates; chlorophyll; ergosterol; microclimate; Lichen growth; nitrogen stress; photosynthesis; proteins; respiration; Symbiosis lichen ; nitrogene uptake; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; ekologisk botanik; Ecological Botany;

   Sammanfattning : Lichens are fascinating symbiotic systems, where a fungus and a unicellular alga, most often green (bipartite green algal lichens; 90% of all lichens), or a fi lamentous cyanobacterium (bipartite cyanobacterial lichens; 10% of all lichens) form a new entity (a thallus) appearing as a new and integrated organism: in about 500 lichens the fungus is associated with both a cyanobacterium and an alga (tripartite lichens). In the thallus, the lichen bionts function both as individual organisms, and as a symbiont partner. LÄS MER

4. 18. Studies on the chemistry of lichens

   Författare :Carl Axel Wachtmeister; Stockholms högskola; []
   Nyckelord :;

   Sammanfattning : .... LÄS MER

5. 19. Studies on spatial and temporal distributions of epiphytic lichens

   Författare :Håkan Lättman; Per Milberg; Jan-Eric Mattsson; Tord Snäll; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Lichens are an important group of organisms in terms of environmental issues, conservation biology and biodiversity, principally due to their sensitivity to changes in their environment. Therefore it is important that we develop our understanding of the factors that affect lichen distribution. LÄS MER

7. 20. Description of spatial and temporal distributions of epiphytic lichens

   Författare :Håkan Lättman; Per Milberg; Bengt Gunnar Jonsson; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; centroid; continuity; lichen; movement; range shift; direction; dispersal; ecological continuity; establishment; global change; global warming; habitat availability; håkan lättman; Biology; Biologi;

   Sammanfattning : Lichens are, in most cases, sensitive to anthropogenic factors such as air pollution, global warming, forestry and fragmentation. Two studies are included in this thesis. The first is an evaluation of the importance of old oak for the rare epiphytic lichen Cliostomum corrugatum (Ach.) Fr. LÄS MER