Sökning: "modified atmosphere"

Visar resultat 11 - 15 av 48 avhandlingar innehållade orden modified atmosphere.

1. 11. Submicrometre aerosol emissions from sea spray and road traffic

   Författare :Monica Mårtensson; Douglas Nilsson; Christer Johansson; Michael Smith; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Eddy covariance method; aerosol emissions; submicrometre sea salt parameterisation; primary marine organic aerosols; sea spray; road traffic emission factors; air-sea exchange; aerosol dynamics model; internal aerosol mixing; combustion aerosols; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap; atmosfärvetenskap; Atmospheric Sciences;

   Sammanfattning : The uncertainty of the climate and health effects of aerosols is still large, one important reason being lack of knowledge of the primary emissions. This thesis combines laboratory and field experiments, and process modelling in an effort to better quantify the submicrometre aerosol emissions and to understand some of the processes in the atmosphere. LÄS MER

3. 12. Exploratory Study of Novel Materials Used for Intermediate Temperature Solid Oxide Fuel Cell (IT-SOFC) Electrolytes

   Författare :Junfu Bu; Pär Jönsson; Zhe Zhao; Christopher Knee; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hafnium oxide; Solid oxide fuel cells SOFCs ; Electrolyte; Electrochemical impedance spectroscopy; Solid state reaction method; Solid state reactive sintering SSRS ; Ionic conductivity; oxygen ion conductivity; Protonic conductivity; Composite electrolyte.;

   Sammanfattning : Currently, yttria-stabilized zirconia (YSZ) is still the dominant electrolyte material in commercial SOFC applications. But it has severe drawbacks due to its high operating temperatures. In present work, two electrolyte materials: Hf0.69Y0. LÄS MER

4. 13. Adsorption, desorption, and redox reactions at iron oxide nanoparticle surfaces

   Författare :Lelde Krumina; MEMEG; []
   Nyckelord :Ferrihydrite; Goethite; Secondary metabolites; Reductive dissolution; Catalytic oxidation; hydroxyl radicals; Fenton reaction; SOM decomposition;

   Sammanfattning : Iron oxide nanoparticles are involved in several important biogeochemical processes. The interfaces between aqueous solutions and iron oxide nanoparticle surfaces are found everywhere in nature, and the chemical and microbial processes occurring at these complex interfaces control e.g. nutrient and contaminant availability and transport. LÄS MER

5. 14. Restaurant meal experiences from customers' perspectives : a grounded theory approach

   Författare :Kai Victor Hansen; Inga-Britt Gustafsson; Øystein Jensen; Tommy Andersson; Örebro universitet; []
   Nyckelord :Customers; meal; grounded theory; à la Carte restaurants; meal experience categories; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Culinary Arts and Meal Science; Måltidskunskap; Måltidskunskap; Culinary Arts and Meal Science;

   Sammanfattning : The purpose of this doctoral dissertation has been to increase the knowledge of customers’ view on relation to commercial restaurant meals and thereby to increase the knowledge within the restaurant industry about customers’ perspectives about meals. The dissertation is based on four studies of customers’ meal experiences in á la Carte restaurants in Norway. LÄS MER

7. 15. Air-Sea Exchange of Momentum and Sensible Heat Over the Baltic Sea

   Författare :Xiaoli Guo Larsén; Sven-Erik Gryning; Uppsala universitet; []
   Nyckelord :Meteorology; meteorologi;

   Sammanfattning : Long term measurements are used to explore the wave impact on the momentum and sensible heat transfer in the marine atmospheric surface layer. This is important in determining the boundary conditions of atmosphere-ocean coupled models of many scales. LÄS MER