Sökning: "sandsten"
Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet sandsten.
1. Development of infrared spectroscopy techniques for environmental monitoring
Sammanfattning : Infrared spectroscopy techniques have long been utilized in identifying and quantifying species of interest to us. Many of the elementary molecules in the atmosphere interact with infrared radiation through their ability to absorb and emit energy in vibrational and rotational transitions. LÄS MER
2. Waterfowl herbivory on submerged macrophytes in eutrophic lakes
Sammanfattning : Submerged macrophytes are thought to stabilize clear-water states of shallow lakes. The aim of this thesis was to elucidate how waterfowl herbivory can affect abundance, distribution and species composition of submerged macrophytes in eutrophic lakes. LÄS MER
3. Museum Naturalium Academiæ Upsaliensis. cujus part. XVII. venia exp. Ord. Med. Ups. præside Carol. Pet. Thunberg, ... publico examini subjicit Gabriel Sandsten, Smolandus. in audit. botanico die 10 Dec. 1794
Sammanfattning : .... LÄS MER
4. Studies on the frost resistance of natural stone
Sammanfattning : This work deals with the effects of freeze-thawing on the deterioration of some types of natural stone, especially stones frequently used in old buildings in Sweden. Laboratory studies were performed mainly on Gotland sandstone. This stone has been widely used in old buildings in the whole Baltic region, and is often badly deteriorated. LÄS MER
5. Single fluid inclusion analysis using ToF-SIMS : Implications for ancient Earth biodiversiy and paleoenvironment studies
Sammanfattning : When and how life first emerged on the Earth is an area of intense research. Signs of the first life on Earth, including morphological fossils, are scarce and hard to interpret. An alternative approach is to study organic biomarkers, which are molecular fossils commonly considered as bona fide biosignatures. LÄS MER