Sökning: "tandem differential mobility analyser"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden tandem differential mobility analyser.

  1. 1. Hygroscopic Properties of Atmospheric Aerosol Particles in Various Environments

    Detta är en avhandling från Division of Nuclear Physics, PO Box 118, S-221 00 Lund, Sweden

    Författare :Jingchuan Zhou; Lunds universitet.; Lund University.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; tandem differential mobility analyser TDMA ; internal and external mixture; closure study; GDF95; AOE-96; Fysik; Physics; Kärnfysik; Nuclear physics; ACE-2; CLAIRE98; differential mobility particle sizer DMPS ; atmospheric aerosol particles; hygroscopic growth; Fysicumarkivet A:2001:Zhou;

    Sammanfattning : Atmospheric aerosol particles affect our living environment in many ways. Their effects are influenced by the interaction between the aerosol particles and the ubiquitous water vapour. The number-size distribution is a primary important parameter for aerosol particles and can be measured using the differential mobility particle sizer (DMPS). LÄS MER

  2. 2. Hygroscopic Growth of Atmospheric Aerosol Particles and Its Relation to Nucleation Scavenging in Clouds

    Detta är en avhandling från Division of Nuclear Physics, Lund University, Box 118, S-221 00 Lund, Sweden

    Författare :Birgitta Svenningsson; Lunds universitet.; Lund University.; [1997]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; aerosol formation; atmospheric aerosols; hygroscopic growth; nucleation scavenging; cloud; water activity; external mixing; tandem differential mobility analyser; Kärnfysik; cloud condensation nuclei spectra; Nuclear physics; TDMA; Fysicumarkivet A:1997:Svenningsson; inorganic salts;

    Sammanfattning : Aerosol particles in the atmosphere are important in several aspects. Some major aerosol constituents that are deposited in ecosystems are acidic or fertilisers and some minor or trace constituents are toxic. LÄS MER

  3. 3. Experimental Studies on Ambient Aerosol Hygroscopicity

    Detta är en avhandling från Division of Nuclear Physics, Lund University, Box 118, S-221 00 Lund, Sweden

    Författare :Erik Fors; Lunds universitet.; Lund University.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fysicumarkivet A:2011:Fors;

    Sammanfattning : Popular Abstract in Swedish Luften vi andas innehåller inte bara gaser som kväve och det syre vi behöver för att leva. Förutom de vanligaste gaserna i atmosfären finns det så kallade spårgaser, som visserligen har väldigt låg koncentration, men som har stor betydelse genom sina speciella kemiska och fysiska egenskaper. LÄS MER

  4. 4. Physical and Chemical Processes in the Formation of Biogenic secondary Organic Aerosols

    Detta är en avhandling från Göteborg

    Författare :Åsa M. Jonsson; Göteborgs universitet.; Gothenburg University.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Tropospheric chemistry; monoterpenes; ozonolysis; secondary organic aerosol SOA ; G-FROST; AIDA; humidity; temperature; hydroxyl radicals; volatility; pinonaldehyde; climate and health;

    Sammanfattning : Vegetation emits a vast number of biogenic volatile organic compounds (BVOC). In the atmosphere they are oxidised, predominantly by O3, OH radicals or NO3 radicals, depending e.g. on chemical structure. LÄS MER

  5. 5. Formation, ageing and thermal properties of secondary organic aerosol

    Detta är en avhandling från Göteborg

    Författare :Eva U. Emanuelsson; Göteborgs universitet.; Gothenburg University.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; volatile organic compounds; biogenic; anthropogenic; secondary organic aerosol; troposphere; volatility; ozone;

    Sammanfattning : In order to properly represent and predict the effects of aerosol in climate systems, an accurate description of their formation and properties is needed. This thesis describes work done to increase the knowledge of processes and properties of atmospherically relevant secondary organic aerosol (SOA) from both biogenic and anthropogenic origin. LÄS MER