Sökning: "hybridization"

Visar resultat 21 - 25 av 578 avhandlingar innehållade ordet hybridization.

  1. 21. Speciation and Metabolic rate : Insights from an avian hybrid zone

    Författare :S. Eryn McFarlane; Anna Qvarnström; Jenny Boughman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; resting metabolic rate; life history; hybridization; speciation; reproductive isolation; Ficedula flycatcher; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : The role of divergent climate adaptation in speciation has received surprisingly little scientific attention. My dissertation research focused on how resting metabolic rate (RMR) relates to the build up of prezygotic and postzygotic isolation in a natural Ficedula flycatcher hybrid zone. LÄS MER

  3. 22. Sex, Sperm and Speciation : On sexual selection and fertility in hybridizing flycatchers

    Författare :Murielle Ålund née Podevin; Anna Qvarnström; Simone Immler; Leonie Moyle; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; sperm biology; sexual selection; speciation; hybridization; cryptic female choice; fertility; Ficedula flycatchers; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : Sexual reproduction entails complex co-evolution between the sexes, necessary for successful fertilization, ensuring individual and population-level fitness. Interfertility is the main criterion for species definition and understanding speciation requires detailed studies of reproductive barriers. LÄS MER

  4. 23. Development of novel molecular methods for Campylobacter species and for Helicobacter pylori

    Författare :Kristina Blom; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Campylobacter; Helicobacter pylori; PCR; mRNA; hybridization; flow cytometry; HpaA; urease; NAP;

    Sammanfattning : Background and Aim: Different Campylobacter species and Helicobacter pylori are common causes of gastrointestinal infections that may result in diarrhea and chronic gastritis, respectively. The overall aim of this thesis was to develop novel methods for identification, differentiation and characterization of these bacteria. LÄS MER

  5. 24. On Hybrid Fuel Cell and Battery Systems for Maritime Applications

    Författare :Ariel Chiche; Carina Lagergren; Göran Lindbergh; Ivan Stenius; Lars Eriksson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fuel Cell; Autonomous Underwater Vehicles AUVs ; Hybridization; Optimization; Buoyancy; Battery; Hydrogen Storage; Oxygen Storage; Dead-End Anode; Purge; Bränslecell; autonom undervattensfarkost AUV ; hybridisering; optimering; flytkraft; batteri; vätgaslagring; syrelagring.; Chemical Engineering; Kemiteknik; Chemical Engineering; Kemiteknik;

    Sammanfattning : Hydrogen is seen as a key player in leading to a sustainable energy sector and decarbonizing the transport sector. Proton Exchange Membrane Fuel Cells (PEMFCs) consume hydrogen and oxygen to generate water, heat and electricity. LÄS MER

  7. 25. Phylogenetic Support and Chloroplast Genome Evolution in Sileneae (Caryophyllaceae)

    Författare :Per Erixon; Bengt Oxelman; Sean Graham; Uppsala universitet; []
    Nyckelord :Biology; Phylogenetics; Bayesian inference; Bootstrapping; cpDNA; Sileneae; Interspecific chloroplast recombination; Hybridization; clpP; Positive selection; Extreme substitution rates; Biologi;

    Sammanfattning : Evolutionary biology is dependent on accurate phylogenies. In this thesis two branch support methods, Bayesian posterior probablities and bootstrap frequencies, were evaluated with simulated data and empirical data from the chloroplast genome. LÄS MER