Sökning: "ultrafine"

Visar resultat 16 - 20 av 40 avhandlingar innehållade ordet ultrafine.

  1. 16. The Urban Aerosol – Sources and Atmospheric Processes

    Författare :Sara Janhäll; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Air quality; traffic emissions; emission factor; Göteborg; ultra-fine particles; size distribution; winter inversion; vertical distribution; source apportionment; air quality; ultrafine particles; vertical distibution;

    Sammanfattning : .... LÄS MER

  3. 17. The fundamentals of ultrafine grinding in vibro-energy and annular ball mills

    Författare :Osawaru A. Orumwense; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mineralteknik; Mineral Processing;

    Sammanfattning : The growing demand for ultrafine materials, the stringent quality requirements and the rising energy cost have prompted interests in the development and improvements of fine particles production techniques. The methods of producing fine particles are summarized in this thesis. LÄS MER

  4. 18. Be Aware of the Indoor Air. Physicochemical Characterization of Airborne Fine Particles in Occupied Homes : Physicochemical Characterization of Airborne Fine Particles in Occupied Homes

    Författare :Yuliya Omelekhina; Metalund; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ultrafine particles UFP ; PM2.5; Black carbon; Indoor sources; Occupied homes; energy renovation;

    Sammanfattning : Negative health effects of exposure to particles of outdoor origin have been confirmed by epidemiological studies. In developed countries, we spend on average 65% of our time in our homes. Thus, the properties of airborne particles indoors need to be understood. LÄS MER

  5. 19. Innate immune airway responses after exposure to ultrafine and ambient particles : in vivo and in vitro models

    Författare :Anna Steneholm; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Inhalation of ultrafine and ambient particles in the air triggers a response in the innate immune system of the airways. This thesis explores measures to reduce exposure to organic dust, to dampen the adverse immune effects of chronic organic swine dust exposure and develop a refined in vitro bronchial mucosa model to reduce in vivo toxicity testing on humans and animals. LÄS MER

  7. 20. The impact of airway-irritating exposure and wet work on subjects with allergy or other sensitivity : epidemiology and mechanisms

    Författare :Pernilla Wiebert; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Air pollution; allergic rhinitis; allergy; asthma; blood; carbonaceous; circulation; clearance; cohort; dermatitis; epidemiology; exposure assessment; Indium-111; inhalation; job-exposure matrix; lung; occupation; retention; Technegas generator; Technetium-99m; translocation; ultrafine particles;

    Sammanfattning : The prevalence of asthma and allergies is increasing, which means that the proportion of workers on the labour market with allergy or other sensitivity also increases. It is as of yet not known to what extent these persons with an elevated sensitivity in the airways or the skin are affected by exposure to irritating substances at work. LÄS MER