Sökning: "particulate nature of matter"

Visar resultat 6 - 10 av 14 avhandlingar innehållade orden particulate nature of matter.

  1. 6. Relationships between models used for teaching chemistry and those expressed by students

    Författare :Karina Adbo; Susanne Wikman; Shu-Nu Chang-Rundgren; Linnéuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; chemistry didactics; particulate nature of matter; phase transition; student expressed models; Swedish school; teaching models; Science Education; Naturvetenskap med utbildningsvetenskaplig inriktning; Science Education; Naturvetenskap med utbildningsvetenskaplig inriktning;

    Sammanfattning : This thesis is focused upon chemistry as a school subject and students' interpretations and use of formally introduced teaching models. To explore students' developing repertoire of chemical models, a longitudinal interview study was undertaken spanning the first year of upper secondary school chemistry. LÄS MER

  3. 7. Urban Climate and Air Pollution in Ouagadougou, Burkina Faso

    Författare :Jenny Lindén; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Sub-Saharan Africa; Sahel; semi arid; nocturnal cooling; urban vegetation; evening evaporative cooling; cooling rate; atmospheric stability; thermal wind; carbon monoxide; particulate matter; road dust; exposure differences;

    Sammanfattning : ABSTRACT Africa has recently been singled out by UN Habitat as the fastest urbanizing continent in the world. The most extreme case was found in the Sahelian city of Ouagadougou, Burkina Faso, where the population is expected to almost double over the next ten years. LÄS MER

  4. 8. Particulate airborne impurities : express analysis and health effects

    Författare :Kai Wilkinson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : The cumulative effects of air pollutants are of principal concern in research on environmental protection in Sweden. Post-industrial society has imposed many limits on emitted air pollutants, yet the number of reports on the negative effects from them is increasing, largely due to human activity in the form of industrial emissions and increased traffic flows. LÄS MER

  5. 9. Bioavailability of organic contaminants in a changing climate

    Författare :Matyas Ripszam; Peter Haglund; Roland Kallenborn; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; climate change; organic contaminants; sorption; dissolved organic carbon; bioavailability;

    Sammanfattning : The effects of predicted future climate change was investigated with special emphasis on the association of organic contaminants with dissolved organic carbon (DOC) in the Baltic Sea.An automated method was developed for the measurements of DOC - water distribution constants at realistic DOC concentrations in brackish water. LÄS MER

  7. 10. On the phase-space distribution of heavy particles in turbulence

    Författare :Jan Meibohm; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fluid dynamics; Particle-laden flows; Turbulent aerosols; Chaotic dynamics; Non-equilibrium statistical physics;

    Sammanfattning : Turbulent fluids laden with small, heavy particles are common in nature. Prominent examples of such turbulent suspensions are water droplets in warm clouds, as well as particulate matter or living organisms in the turbulent upper layer of oceans. LÄS MER