Sökning: "Mineral dust"

Visar resultat 1 - 5 av 12 avhandlingar innehållade orden Mineral dust.

  1. 1. Measuring occupational dust exposure with a passive sampler

    Detta är en avhandling från Umeå : Umeå university

    Författare :Mariam Shirdel; Umeå universitet.; [2018]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; dust particles; mineral; PM10; PM2.5; respirable fraction; UNC passive aerosol sampler; working environment;

    Sammanfattning : Objectives: In a working environment it is important to measure dust exposure to evaluate possible health issues. Passive sampling could be an alternative to active sampling with pumps when measuring occupational dust exposure. One passive sampler is the University of North Carolina passive aerosol sampler (UNC sampler). LÄS MER

  2. 2. Reconstruction of Holocene atmospheric mineral dust deposition from raised peat bogs in south–central Sweden

    Detta är en avhandling från Stockholm : Department of Geological Sciences, Stockholm University

    Författare :Jenny Sjöström; Stockholms universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mineral dust; paleodust; peat; Sweden; Holocene; mineralogy; XRD;

    Sammanfattning : Atmospheric mineral dust plays a dynamic role in the climate system acting both as a forcing and a feedback mechanism. To date, the majority of paleodust studies have been conducted on marine sediments or polar ice cores, while terrestrial deposition has been less studied. LÄS MER

  3. 3. Air quality assessment and pollution measurements in a typical Sub-Sahara African city: Nairobi, Kenya

    Detta är en avhandling från Göteborg

    Författare :Samuel Mwaniki Gaita; Göteborgs universitet.; Gothenburg University.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Particulate matter pollutants; Source apportionment; Sub-Saharan Africa; deposition fractions;

    Sammanfattning : Exposure to air pollution is detrimental to human health and is reported to cause about 7 million premature deaths in 2012 according to the World Health Organization. In sub-Sahara Africa (SSA) cities, air quality issue is complex due to challenges resulting from the rapid growth of urban population, poor infrastructure development and an exponential increase in number of vehicles. LÄS MER

  4. 4. Chemical exposures, biological monitoring and cancer risks in Swedish aluminium foundries and remelting plants

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Håkan Westberg; Linköpings universitet.; Linköpings universitet.; [2001]

    Sammanfattning : In aluminium foundries and remelting plants, a wide range of chemical agents are formed and emitted, including some highly toxic organochlorine compounds. This thesis explores emissions and exposures, as well as worker risk of porphyria and cancer. LÄS MER

  5. 5. Thin water and ice films on minerals a molecular level study

    Detta är en avhandling från Umeå : Umeå University

    Författare :Merve Yeşilbaş; Umeå universitet.; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; water; ice; cryosalt; minerals; rocks; atmosphere; Dynamic Vapour Sorption; FTIR; cryo-FESEM; fysikalisk kemi; Physical Chemistry;

    Sammanfattning : Minerals in Earth’s crust and suspended in the atmosphere form water or ice films as thin as a few nanometers to as thick as a few micrometers, and beyond. Mineral-bound water and ice films in terrestrial systems (e.g. LÄS MER