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The Archean basement in the northeastern part of the Kaapvaal craton is intruded by a large number of mafic dykes, defining three major dyke swarms, which collectively appear to fan out from the Bushveld Complex. Herein we present U-Pb baddeleyite ages for two of these dyke swarms, the northwest trending Badplaas Dyke Swarm and the east-west trending Rykoppies Dyke Swarm, and infer their correlati

Objectives The aim of the study was to examine the predictive value of QRS duration and morphology during watchful waiting in asymptomatic patients with aortic stenosis (AS). Background QRS duration and morphology are associated with poor prognosis in many different populations, but the predictive value, particularly of the risk of sudden cardiac death (SCD), in asymptomatic patients with AS has n

Leaf area index (LAI), a measure of canopy density, is a key variable for modelling and understanding primary productivity, and also water use and energy exchange in forest ecosystems. However, LAI varies considerably with phenology and disturbance patterns, so alternative approaches to quantifying stand-level processes should be considered. The carbon isotope composition of soil organic matter (C

1. Shallow lake ecosystems are normally dominated by submerged and emergent plants. Biological stabilising mechanisms help preserve this dominance. The systems may switch to dominance by phytoplankton, however, with loss of submerged plants. This process usually takes place against a background of increasing nutrient loadings but also requires additional switch mechanisms, which damage the plants

Hydroxyl radicals (OH) are the most important reagent for the oxidation of trace gases in the atmosphere. OH concentrations measured during recent field campaigns in isoprene-rich environments were unexpectedly large. A number of studies showed that unimolecular reactions of organic peroxy radicals (RO2) formed in the initial reaction step of isoprene with OH play an important role for the OH budg

Today, innovation is a key word for many universities, as it constitutes an important part of most universities’ public and scientific interaction with society. Many universities are striving to increase the number of innovations spun out. At many universities, innovations are thought of as being sprung from research projects and generated by researchers. However, Sandström (2014) claims that whil

Popular Abstract in Swedish Antibiotikaresistens hos pneumokocker har utvecklats till ett problem i hela världen. Interkontinental spridning av ett fåtal resistenta kloner verkar stå för den snabba ökningen av förekomsten av pneumokocker med nedsatt känslighet för penicillin (PNSP). Förekomst av PNSP har reducerat behandlingsalternativen för såväl vanliga luftvägsinfektioner som invasiva infektionPneumococcal resistance to antibiotics has become a worldwide problem. The rapid increase in frequency seems to be caused by intercontinental spread of a few resistant clones. Resistance to antibiotics in pneumococci has reduced the therapeutic arsenal for common respiratory tract infections as well as for invasive infections. Problems of specific clinical concern are meningitis due to penicillin-

Detta examensarbete har som syfte att undersöka möjligheterna för införandet av en kvotplikt på den svenska jetbränslemarknaden, något som inte tidigare gjorts i en sammanfattande studie. Målet är att utvärdera detta styrmedel från flera olika perspektiv. Fokus läggs på det legala, ekonomin I förnybara bränslen, utformingen av ett kvotsystem och effekten ett sådant system kan ha på den svenska fly