Search for dissertations about: "Nitrogen dioxide NO2"

Showing result 6 - 10 of 29 swedish dissertations containing the words Nitrogen dioxide NO2.

  2. 6. Validation of diffusive samplers for nitrogen oxides and applications in various environments

    Author : Annika Hagenbjörk-Gustafsson; Kåre Eriksson; Greta Smedje; Umeå universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nitrogen dioxide; NOx; diffusive sampling; validation; vehicle exhaust; exposure measurement;

    Abstract : The overall aim of this thesis was to validate diffusive samplers for measurements of nitrogen dioxide (NO2) and nitrogen oxides (NOx). The Willems badge was validated for NO2 measurements both in laboratory tests and in field tests (Paper I-II). The sampling rate was 40.0 mL/min for ambient air concentrations and 46. READ MORE

  4. 7. Oxidation of terpenes in indoor environments : A study of influencing factors

    Author : Linda Pommer; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Environmental chemistry; Monoterpene; Ozone O3 ; Nitrogen dioxide NO2 ; Nitrogen oxide NO ; Relative humidity RH ; Modelling; Scrubber; Experimental design; Interaction; Volatile organic compounds VOC ; Sick buildings syndrome SBS ; Principal component analysis PCA ; Indoor air; Ventilation; Tenax TA; Sodium sulphite; Miljökemi; Environmental chemistry; Miljökemi; analytisk kemi; Analytical Chemistry;

    Abstract : In this thesis the oxidation of monoterpenes by O3 and NO2 and factors that influenced the oxidation were studied. In the environment both ozone (O3) and nitrogen dioxide (NO2) are present as oxidising gases, which causes sampling artefacts when using Tenax TA as an adsorbent to sample organic compounds in the air. READ MORE

  5. 8. Molecular mechanisms of nitrogen dioxide induced lung damage

    Author : Ba Tu; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Nitrogen dioxide (NO2) is an oxidant gas which contaminates ambient air in many urban and industrial locations, and indoor air in homes with combustion appliances. The Environmental Protection Agency (USA) regulates N02 in ambient air as a "criteria" pollutant. READ MORE

  6. 9. Effects of nitrogen dioxide on airway responsiveness in allergic asthma

    Author : Victoria Strand; Karolinska Institutet; Karolinska Institutet; []
    Keywords : air pollution; nitrogen dioxide; asthma; allergy; airway responsiveness; pulmonary function; eosinophils; particulates; repeated exposure;

    Abstract : Asthma is one of the most common chronic diseases in the industrialized world and its prevalence is increasing. Clinical symptoms of airway obstruction and bronchial hyper responsiveness can be induced by specific agents, such as allergens and non-specific stimuli, such as cold air and irritants. READ MORE

  7. 10. Oxy-Fuel Combustion - The Control of Nitrogen Oxides

    Author : Fredrik Normann; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; oxy-fuel; NOx; O2 CO2; combustion; emission; nitrogen oxides;

    Abstract : Oxy-fuel combustion is one of the main candidates for carbon dioxide capture from power plants. In oxy-fuel combustion, oxygen diluted with recycled flue gas oxidizes the fuel. The elimination of air-borne nitrogen generates a flue gas that mainly consists of carbon dioxide and water. READ MORE