Sökning: "secondary phase"

Visar resultat 16 - 20 av 358 avhandlingar innehållade orden secondary phase.

1. 16. Formation, ageing and thermal properties of secondary organic aerosol

   Författare :Eva U. Emanuelsson; Göteborgs universitet; []
   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

3. 17. Analysis of tracer molecules from organic aerosols - Application of liquid phase microextraction to aerosol analysis

   Författare :Murtaza Hyder; Centrum för analys och syntes; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Liquid membrane extraction; Secondary organic aerosols; Enrichment; Tracers; Hollow fiber liquid phase microextraction; Biomass burning; Organic carbon;

   Sammanfattning : Airborne particulate matter is well known because of its adverse impacts on human health and its role in climate processes. In order to understand completely the role of aerosols in atmosphere, their chemical composition is of basic importance. LÄS MER

4. 18. Quantitative Spectroscopy of Gas Phase Reactions at Elevated Temperatures

   Författare :Joachim Walewski; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fluiddynamik; Gaser; plasma; Maskinteknik; vibration and acoustic engineering; vacuum technology; hydraulics; vibrationer; vakuumteknik; statistical inference; Mechanical engineering; polarisation spectroscopy; diamond CVD; quantitative spectroscopy; hydraulik; gas phase kinetics; plasmas; fluid dynamics; Gases; Fysik; akustik; Physics; Fysicumarkivet A:2001:Walewski;

   Sammanfattning : Gas phase reactions at elevated temperatures are versatile tools for material manufacturing and energy conversion. They are of great commercial interest, but they often entail hazardous impacts on the environment. There is consequently a pronounced need for the further develpment of processes utilising these types of reactions. LÄS MER

5. 19. Secondary ice production : An empirical formulation and organization of mechanisms among simulated cloud-types

   Författare :Akash Deshmukh; MERGE: ModElling the Regional and Global Earth system; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; ice; collision; ice production; ice enhancement; secondary ice; sublimation; fragmentation;

   Sammanfattning : Clouds are essential elements within Earth's atmosphere, posing a challenge for cloud-resolving models in understanding the creation of new cloud ice particles from existing ice and liquid phases. Such ice initiation determines cloud microphysical and radiative properties, influencing cloud phase, precipitation and cloud extent/properties. LÄS MER

7. 20. Med kränkningen som måttstock : om planerade bemötanden av främlingsfientliga uttryck i gymnasieskolan

   Författare :Emma Arneback; Tomas Englund; Carsten Ljunggren; Robert Thornberg; Örebro universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; moral education; upper secondary school; equal treatment; Taguieff; Dewey. philosophy of education; xenophobia; racism; violation.; Education; Pedagogik;

   Sammanfattning : The aim of this dissertation is to map and analyse planned responses to expressions of racism in upper secondary schools. Three questions are in focus: (1) What courses of action, in response to expressions of racism, are advocated in philosophical texts and equal treatment plans for upper secondary schools? (2) What consequences have these courses of action for the formation of the mission of schools, the responsibility of teachers, and the limits of free speech? (3) What kinds of expressions of racism are these courses of action intended to be a response to? The study takes its point of departure in two theoretical traditions: Pierre-André Taguieff’s categorisations of racism are used to define the problem in the dissertation, while John Dewey’s moral philosophy provides the methodological base. LÄS MER