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Experimental and LES investigations of a SGT-800 burner in a combustion rig

The Siemens gas turbine SGT-800 has an annular combustor and 30 dry low emission burners. In order to further reduce the emission levels and to obtain improved understanding of the flow and associated flame dynamics, single burner rig tests have been performed. The laboratory measurements are complemented by Large Eddy Simulation (LES) to analyze the effect on the flame dynamics due to the transie

External Mycelia of Mycorrhizal Fungi - responses to elevated N in forest ecosystems

Popular Abstract in Swedish De flesta växter lever i symbios med mykorrhizasvampar. I mykorrhizaroten, som utgör kontaktzonen mellan växten och den omgivande marken, sker ett utbyte av energi (kolhydrater) från växten till svampen, och näringsämnen (t.ex. kväve och fosfor) som tagits upp av mykorrhizasvampen överförs till växten. Från mykorrhizaroten utgår det externa mycelet, nätverket av svamphyMost plants live in symbiosis with mycorrhizal fungi. Mycorrhizal roots constitute the interface between the plant and the soil, and almost every fine root of forest trees in nitrogen-limited boreal and temperate forests is colonised by ectomycorrhizal (EM) fungi. The mycelia of EM and ericoid mycorrhizal (ErM) fungi are very important for plant N uptake and N cycling in forest soils. Earlier labo

Rheumatoid Arthritis in a 10-Year Perspective, Outcome for Patients Followed from Early Disease

Popular Abstract in Swedish Reumatoid artrit/ledgångsreumatism (RA) är en kronisk inflammatorisk sjukdom som i första hand drabbar lederna. Man uppskattar sjukdomens förekomst i den vuxna befolkningen till cirka en halv procent och den är 2-4 gånger vanligare hos kvinnor. Vi vet inte vad som orsakar RA, men såväl ärftliga som omgivningsfaktorer har betydelse. RA har ett varierande förlopp. Dels kaRheumatoid arthritis (RA) is characterized by persistent inflammation, progressive joint damage and disability. This thesis describes the outcome after 10 years in a cohort of 183 RA patients (116 women, 67 men) recruited 1985-89. The mean age was 51 years and symptom duration 11 months at inclusion. Standardized clinical, biochemical and radiographic assessments were performed annually. Health st

Livets ursprung och liv i extrema miljöer

Astrobiologi kallar vi det vetenskapliga sökandet efter liv i rymden som görs av den jordbundna varelsen Homo sapiens sapiens och som utförs på en vanlig planet kring en vanlig sol bland miljarder andra stjärnor och galaxer. Under hennes i universellt perspektiv korta historia på jorden har hon ofta, när hon blickat upp på den stjärnbeströdda natthimlen, undrat över de grundläggande existentiella

Low recognition of posttraumatic stress disorder in primary care

Post-traumatic stress disorder (PTSD) is a common and disabling disorder that develops as a consequence of traumatic events and is characterised by distressing re-experiencing of parts of the trauma, avoidance of reminders, emotional numbing and hyperarousal. The NICE guidelines for PTSD (2005)recommend trauma-focused psychological therapy as the first-line treatment. A survey of 129 GPs in south

The archaeology of the Bronze Age cultural landscape - research goals, methods, and results

The article describes the methods used to determine Bronze Age peoples' use of the landscape in southern Scandinavia. The study is part of the Ystad Project, a large, interdisciplinary project with the aim of studying people and landscape from the advent of agriculture about 6000 years ago. Methods used included studies of archive data and maps, fieldwalking, and excavation. Results showed that th