Sökning: "ozone"

Visar resultat 1 - 5 av 168 avhandlingar innehållade ordet ozone.

  1. 1. Ozone chemistry in aqueous solution : ozone decomposition and stabilisation

    Författare :Margareta Eriksson; Lars Kloo; KTH; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Chemistry; Kemi; Chemistry; Kemi;

    Sammanfattning : Ozone is used in many applications in the industry as an oxidising agent for example for bleaching and sterilisation. The decomposition of ozone in aqueous solutions is complex, and is affected by many properties such as, pH, temperature and substances present in the water. LÄS MER

  2. 2. Ozone and diesel exhaust : airway signaling, inflammation and pollutant interactions

    Författare :Jenny Bosson; Anders Blomberg; Thomas Sandström; Ellinor Ädelroth; John Balmes; Umeå universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; air pollution; ozone; diesel exhaust; airway inflammation; asthma; immunohistochemistry; Lung diseases; Lungsjukdomar; lungmedicin; Lung Medicine;

    Sammanfattning : It is well established that air pollution has detrimental effects on both human health as well as the environment. Exposure to ozone and particulate matter pollution, is associated with an increase in cardiopulmonary mortality and morbidity. Asthmatics, elderly and children have been indicated as especially sensitive groups. LÄS MER

  3. 3. Ozonskiktet och risksamhället : En studie av den svenska politiska diskussionen rörande ozonskiktet 1968-1992

    Författare :Mathias Martinsson; Jonas Anshelm; Linköpings universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Ozone layer; ozone depletion; CFC; environmental politics; risk society; ecological modernisation; reflexive modernisation; political use of scientific knowledge; ozonskiktet; miljöaspekter; miljöpolitik; historia; Sverige; 1968-1992; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

    Sammanfattning : This thesis examines the development of the Swedish political discussion concerning the ozonelayer between 1968 and 1992. The analysis is based on the assumption that the threats against the ozone layer confronted the political system with an issue that called for new ways of thinking about environmental problems. LÄS MER

  4. 4. Impact of Rossby waves on ozone distribution and dynamics of the stratosphere and troposphere

    Författare :Grigory Nikulin; Sheila Kirkwood; Ulrike Langematz; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Meteorology; ozone; wave activity; trends; Brewer-Dobson circulation; Rossby waves; Arctic Oscillation; low ozone events; Meteorologi; Meteorology; Meteorologi; Meteorology; meteorologi;

    Sammanfattning : Several physical mechanisms concerning the impact of Rossby waves on ozone distribution and circulation in the stratosphere and troposphere are studied in the thesis.Summertime total ozone variability over Middle Asia and Northern Scandinavia shows similar wave-like behaviour with typical periods of 10-20 days and amplitudes of 20-50 Dobson units. LÄS MER

  5. 5. The influence of climate on ozone risk for vegetation

    Författare :Jenny Klingberg; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Nyckelord :local climate; topography; nocturnal temperature inversions; ozone spring peak; passive diffusion sampler; AOT40; stomatal ozone flux; stomatal conductance; phytotoxic ozone dose; EMEP; MATCH; RCA3; climate change;

    Sammanfattning : Ground-level ozone (O3) is a harmful air pollutant causing reduced crop yield and quality, reduced forest growth and negative effects on human health in large parts of the world. O3 is generally seen as a regional scale air pollution problem, but O3 concentration ([O3]) variation on a smaller geographical scale can be considerable. LÄS MER