Sökning: "ozone"

Visar resultat 1 - 5 av 138 avhandlingar innehållade ordet ozone.

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

    Detta är en avhandling från Stockholm : KTH

    Författare :Margareta Eriksson; KTH.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi; NATURAL SCIENCES Chemistry; NATURVETENSKAP 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

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Jenny Bosson; Umeå universitet.; [2007]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; air pollution; ozone; diesel exhaust; airway inflammation; asthma; immunohistochemistry; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Lung diseases; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin 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. Impact of Rossby waves on ozone distribution and dynamics of the stratosphere and troposphere

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Grigory Nikulin; Umeå universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Meteorology; ozone; wave activity; trends; Brewer-Dobson circulation; Rossby waves; Arctic Oscillation; low ozone events; Meteorologi; NATURAL SCIENCES Earth sciences Atmosphere and hydrosphere sciences Meteorology; NATURVETENSKAP Geovetenskap Atmosfärs- och hydrosfärsvetenskap Meteorologi; meteorologi; Meteorology;

    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

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

    Detta är en avhandling från Umeå : Umeå universitet

    Författare :Jenny Klingberg; Göteborgs universitet.; Gothenburg University.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; 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

  5. 5. On the importance of radical formation in ozone bleaching

    Detta är en avhandling från Institutionen för pappers- och massateknologi

    Författare :Martin Ragnar; KTH.; [2000]
    Nyckelord :ozone; radical formation; superoxide; hydroxyl; selectivity; hexenuronic acid;

    Sammanfattning : .... LÄS MER