Sökning: "two-step evolution"
Visar resultat 11 - 15 av 15 avhandlingar innehållade orden two-step evolution.
11. Phylogenetic Inference and Allopolyploid Speciation - A Study of Silene section Physolychnis
Sammanfattning : The major theme of this thesis is allopolyploidization, with focus on Silene section Physolychnis. The evolutionary history of an allopolyploid species can be established by inferring the sister relationships of the homoeologous sequences from low copy nuclear markers. LÄS MER
12. Ring-opening catalysts for cetane improvement of diesel fuels
Sammanfattning : The global oil refining industry with its present product distribution essentially shifted towards fuels such as gasoline and diesel will most likely hold the fort for considerable time. However, conditions are changing and refinery survival will very much depend on long-term planning, process and product flexibility and being at the frontiers of refining technology, a technology where catalysts play leading roles. LÄS MER
13. Growth of thick GaN layers on sapphire by Hydride Vapour Phase Epitaxy
Sammanfattning : Gallium nitride (GaN) is a wide bandgap material that is already extensively used in industrial production of optoelectronic devices (light emitters) that operate in the blue and ultraviolet wavelength range. GaN is interesting not only because it has a wide bandgap (3. LÄS MER
14. Martensitic Transformation in High Carbon Steels - Martensite Tetragonality and Impact of Cooling Rate
Sammanfattning : Case-hardened gears are an essential part of our every day life in their role of power transmission in cars and heavy-duty trucks. The increasing use of low pressure carburizing (LPC) for case-hardening in combination with high pressure gas quenching (HPGQ) for cooling opens new possibilities in the design of heat treatments for improved fatigue performance. LÄS MER
15. International and export behavior of firms : a critical review and empirical assessment
Sammanfattning : The current thesis examines exporting as a leading discipline in International Business and sheds light into various exporting issues which have not been thoroughly investigated in the past. The thesis is divided into two parts. The first part includes two studies based on literature review, specifically on International Management and Exporting. LÄS MER