Sökning: "carotenoids"

Visar resultat 21 - 25 av 50 avhandlingar innehållade ordet carotenoids.

  1. 21. Coherent Multidimensional Spectroscopy as a Probe of System-Bath Interactions

    Författare :Niklas Christensson; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nonlinear Spectroscopy Photon Echoes System-Bath Interactions Carotenoids;

    Sammanfattning : The interaction of molecules with their environment has a profound effect on dynamics in molecular systems. System-bath interactions, or the interaction of electronic and nuclear degrees of freedom, are important in order to understand chemical reactions and transport of energy and electrons in the condensed phase. LÄS MER

  3. 22. Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)

    Författare :Maria Prager; Göteborgs universitet; []
    Nyckelord :Ploceidae; weaverbirds; stochastic character mapping; phylogenetic uncertainty; mate choice; status signalling; sexual dichromatism; C4-oxygenation; status signalling;

    Sammanfattning : Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic and ontogenetic explanations for divergence in two classic condition-dependent signal traits in the African widowbirds and bishops (Euplectes spp. LÄS MER

  4. 23. Zooplankton responses to threats from UV and predation

    Författare :Samuel Hylander; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Ultraviolet radiation (UV) has been present longer than any biological life, and during the development of life the radiation intensities were initially high. Eventually a vital ozone layer developed, but despite that this layer screens out most of the high energy wavelengths, some still enter the biosphere and is potentially harmful to life on earth. LÄS MER

  5. 24. Synthesis and Photoinduced Electron Transfer of Donor-Sensitizer-Acceptor Systems

    Författare :Yunhua Xu; Licheng Sun; Björn Åkermark; Jean-Pierre Sauvage; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Artificial photosynthesis; Dye-sensitized solar cells; Electron donors; Dinuclear ruthenium complexes; Electron transfer; Organic chemistry; Organisk kemi;

    Sammanfattning : Artificial systems involving water oxidation and solar cells are promising ways for the conversion of solar energy into fuels and electricity. These systems usually consist of a photosensitizer, an electron donor and / or an electron acceptor. LÄS MER

  7. 25. Bolivian tomatoes : genetic diversity, quality traits and value chains

    Författare :Evelyn Elisabeth Villanueva Gutierrez; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Bolivia is considered one of the centres of origin and distribution of tomatoes, and wild relatives harbouring potential genetic diversity and quality traits are preserved in germplasm collections. Tomato is the most commonly grown vegetable world-wide, but in Bolivia, tomatoes are lowyielding and have short shelf-life. LÄS MER