Sökning: "sources"

Visar resultat 26 - 30 av 4429 avhandlingar innehållade ordet sources.

  1. 26. Unraveling the importance of solid and adsorbed phase mercury speciation for methylmercury formation, evasion and bioaccumulation

    Författare :Sofi Jonsson; Erik Björn; Ulf Skyllberg; Erik Lundberg; Per Persson; Robert Mason; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; mercury; methylmercury; aquatic systems; estuary; Hg; MeHg; bioaccumulation; methylation; demethylation; evasion; sediment; water; terrestrial sources; atmospheric sources; climate change; eutrophication;

    Sammanfattning : Monomethylmercury, MeHg, is formed under anoxic conditions in waters, sediments and soils and then bioaccumulated and biomagnified in aquatic food webs, negatively effecting both human and wildlife health. It is generally accepted that precipitation of mercury, Hg, and adsorption of Hg to e.g. LÄS MER

  3. 27. On the lifecycle of aerosol particles : Sources and dispersion over Scandinavia

    Författare :Peter Tunved; Hans-Christen Hansson; Johan Ström; Douglas Nilsson; Urs Baltensperger; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aerosols; Meteorology; Meteorologi;

    Sammanfattning : Aerosol particles are likely important contributors to our future climate. Further, during recent years, effects on human health arising from emissions of particulate material have gained increasing attention. LÄS MER

  4. 28. Air pollution in Nairobi slums : sources, levels and lay perceptions

    Författare :Kanyiva Muindi; Nawi Ng; Joacim Rocklöv; Elizabeth Kimani-Murage; Marie Thynell; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Air pollution; perceptions; slums; health impacts; Nairobi; Epidemiology; epidemiologi; folkhälsa; Public health;

    Sammanfattning : BackgroundAir quality in Africa has remained a relatively under-researched field. Most of the African population is dependent on biomass for cooking and heating, with most of the combustion happening in low efficiency stoves in unvented kitchens. LÄS MER

  5. 29. Quantification of sources and removal mechanisms of atmospheric aerosol particles

    Författare :Henrik Grythe; Johan Ström; Dominick Spracklen; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aerosol; aerosol removal; aerosol emission; aerosol sources; FLEXPART; Arctic aerosol; Applied Environmental Science; tillämpad miljövetenskap;

    Sammanfattning : The focus of this work has been to quantify important processes for climatically relevant aerosols, and to improve our understanding of, and ability to accurately model, aerosols in the atmosphere on a large scale. This thesis contains five papers focused on different parts of the life cycle of atmospheric aerosol particles. LÄS MER

  7. 30. Att gestalta en region : Källornas strategier och mediernas föreställningar om Öresund

    Författare :Jesper Falkheimer; Institutionen för strategisk kommunikation; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Media Analysis; Öresund Region; Sources; Transnational Journalism; Public Relations; Press and communication sciences; News Management; media; Journalistik; media; kommunikation;

    Sammanfattning : The Öresund Bridge between Denmark and Sweden was inaugurated in the year 2000, connecting the city of Malmö and the Danish capital Copenhagen. The bridge was an important move towards the visionary realisation of a transnational Öresund Region. In this dissertation the communicative aspects of the regional process are put in focus. LÄS MER