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Visar resultat 1 - 5 av 188 avhandlingar som matchar ovanstående sökkriterier.
1. Ultra-short-chain perfluoroalkyl acids : Environmental occurrence, sources and distribution
Sammanfattning : Ultra-short-chain perfluoroalkyl acids (PFAAs) is a group of highly fluorinated and very stable chemicals. Their small molecular structure in combination with the acidic functional group result in highly polar compounds and concern has been raised as these substances may threaten our drinking water supplies. LÄS MER
2. Chemical characteristics of atmospheric aerosols : the influence of natural and man-made sources and sinks
Sammanfattning : In order to improve the understanding of the climatic and environmental effects of atmospheric aerosol particles, knowledge about their sources, sinks, chemical and physical characteristics as well as transportation in the atmosphere is needed. This thesis examines the water-soluble chemical characteristics of aerosol particles and precipitation and their interaction with trace gases. LÄS MER
3. On Sahelian-Sudan rainfall and its moisture sources
Sammanfattning : The African Sahel is one of the most vulnerable regions to climate variability at different time scales. It is an arid to semi-arid region with limited water resources. The summer rainfall is one of these sources, but it exhibits pronounced interannual variability. This thesis presents several aspects of Sahelian Sudan rainfall. LÄS MER
4. Sources, transport and fate of perfluoroalkyl acids in the atmosphere
Sammanfattning : Perfluoroalkyl acids (PFAAs) are man-made chemicals which have been observed in the global environment, even in locations far away from where they are emitted. These persistent substances are taken up in humans and biota and may have toxic effects. LÄS MER
5. Resonance light sources and their use in atmospheric research
Sammanfattning : .... LÄS MER