Sökning: "recombination rate"

Visar resultat 1 - 5 av 99 avhandlingar innehållade orden recombination rate.

1. 1. Ion recombination in liquid ionization chambers : development of an experimental method to quantify general recombination

   Författare :Jonas Andersson; Heikki Tölli; Lennart Johansson; Anders Ahnesjö; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; General recombination; initial recombination; liquid ionization chamber; radiation dosimetry; radiofysik; radiation physics;

   Sammanfattning : An experimental method (the two-dose-rate method) for the correction of general recombination losses in liquid ionization chambers has been developed and employed in experiments with different liquids and radiation qualities. The method is based on a disassociation of initial and general recombination, since an ionized liquid is simultaneously affected by both of these processes. LÄS MER

3. 2. Evolutionary Processes and Hybridization within the Peat Mosses, Sphagnum

   Författare :Rayna Natcheva; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .; Sphagnum; bryophytes; morphology; phytogeography; chemotaxonomy. Physiology of nonvascular plants; Systematisk botanik; growth rate; regeneration; evolution; Systematic botany; taxonomy; introgression; maternal inheritance; recombination; hybridizarion;

   Sammanfattning : The aim of this thesis was to reveal details of the interspecific hybridization among bryophytes as exemplified by Sphagnum capillifolium and S. quinquefarium. LÄS MER

4. 3. Advances in studying the role of genetic divergence and recombination in adaptation in non-model species

   Författare :Ramprasad Neethiraj; Christopher Wheat; Sören Nylin; Mathieu Joron; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Recombination; Genetic divergence; Lepidoptera; Genetic variation; Genetic diversity; Holocentric chromosomes; cis-regulatory variation; Allele-specific expression; populationsgenetik; Population Genetics;

   Sammanfattning : Understanding the role of genetic divergence and recombination in adaptation is crucial to understanding the evolutionary potential of species since they can directly affect the levels of genetic variation present within populations or species. Genetic variation in the functional parts of the genome such as exons or regulatory regions is the raw material for evolution, because natural selection can only operate on phenotypic variation already present in the population. LÄS MER

5. 4. Interaction of atomic ions with electrons : Recombination rate coefficients for C1+, F5+, Ne5+, S14+,S15+

   Författare :Sultan Mahmood; Reinhold Schuch; Christoph Biedermann; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; fysik; Physics;

   Sammanfattning : This thesis concentrates on electron-ion interaction studies, in particular focusing on dielectronic recombination (DR) of highly charged ions relevant to astrophysics and plasma physics. The measurements were performed at the Stockholm Refrigerated Electron Beam Ion Trap (R-EBIT) and at the CRYRING heavy-ion storage ring. LÄS MER

7. 5. Electron - Ion Recombination Data for Plasma Applications : Results from Electron Beam Ion Trap and Ion Storage Ring

   Författare :Safdar Ali; Reinhold Schuch; José R. Crespo López-Urrutia; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Highly charged ions; Atomic processes; Atomic data; Electron-ion recombination; Plasmas; fysik; Physics;

   Sammanfattning : This thesis contains results of electron-ion recombination processes in atomic ions relevant for plasma applications. The measurements were performed at the Stockholm Refrigerated Electron Beam Ion Trap (R-EBIT) and at the CRYRING heavy-ion storage ring. LÄS MER