Sökning: "Johan Eriksson"
Visar resultat 1 - 5 av 69 avhandlingar innehållade orden Johan Eriksson.
1. Polybrominated diphenyl ethers and Tetrabromobisphenol A : Chemical synthesis, X-ray crystallography and Photochemical degradation
Sammanfattning : In the 1960s’ several manmade chemicals were detected in the environment, far from their sources. The most well known, and most likely those with the largest impact on the society, were DDT and its related compounds, and PCBs. These anthropogenic compounds were characterised as persistent organic pollutants (POPs). LÄS MER
Sammanfattning : Spacecraft on interplanetary missions or advanced satellites orbiting the Earth all require propulsion systems to complete their missions. Introducing microelectromechanical systems technology to the space industry will not only reduce size and weight of the propulsion system, but can also increase the performance of the mission. LÄS MER
Sammanfattning : Linking environmental variation to population dynamics is necessary to understand and predict how the environment influences species abundances and distributions. I used demographic, environmental and trait data of forest herbs to study effects of spatial variation in environmental factors on populations as well as environmental change in terms of effects of forest succession on field layer plants. LÄS MER
4. Vita S. Brynolphi Svethice ex apographo Örnhjelmiano Bibliothecae R. Acad. Upsal. aucta et illustrata. Venia ampl. Facult. Philos. Upsal. præside mag. Joh. Henr. Schröder ... p. p. Ericus Erici Sparre comes. Gestr. Helsingus, in Audit. Gustav. die xxi. Maji MDCCCXXXVI. H A. M. S., P. I
Sammanfattning : .... LÄS MER
Sammanfattning : Gas turbines are widely used in industry for power generation and as a power source at "hard to reach" locations where other possibilities for electrical supply are insufficient. There is a strong need for greener energy, considering the effect that pollution has had on global warming, and we need to come up with ways of producing cleaner electricity. LÄS MER