Sökning: "Ljus spektrum"

Visar resultat 1 - 5 av 20 uppsatser innehållade orden Ljus spektrum.

  1. 1. Spatial resolution threshold in layers and red jungle fowls : are there differences due to light intensity or light spectra?

    Master-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Pauline Annerstedt; [2018]
    Nyckelord :spatial resolution threshold; layer; red jungle fowls; visual acuity;

    Sammanfattning : The domestic fowl (Gallus gallus domesticus) originates from the forests in South-east Asia. It may be correct to assume that the visual system of the domestic fowl is still adapted to light that is filtered through the green forest canopy. LÄS MER

  2. 2. Copper abundances of F and G dwarf stars in the Milky Way

    Kandidat-uppsats, Lunds universitet/Astronomi

    Författare :Filip Andersson; [2018]
    Nyckelord :Copper Abundance; Galaxy Formation; Dwarf Stars; Milky Way; Chemical Evolution; Physics and Astronomy;

    Sammanfattning : An investigation has been done in order increase the understanding of the origin and chemical evolution of copper in the Milky Way stellar disks. This is interesting to know as it plays a part of the Galaxy puzzle, so we become more able to map how and why galaxies look like they do. LÄS MER

  3. 3. Chemical composition of giant planet hosts

    Kandidat-uppsats, Lunds universitet/Astronomi

    Författare :Frida Ekstrand; [2017]
    Nyckelord :chemical composition; planet hosts; stellar twins; differential abundance analysis; Physics and Astronomy;

    Sammanfattning : Does the formation of planets give imprints on the chemical composition of the host star? In order to test this theory a differential abundance analysis (i.e. comparing two stars' abundances to each other) was carried out on a few stars with and without known planets, to see if any differences were found. LÄS MER

  4. 4. Evaluation of Amyloid Fibrils as Templates for Photon Upconversion by Sensitized Triplet-Triplet Annihilation

    Kandidat-uppsats, KTH/Skolan för kemivetenskap (CHE); KTH/Skolan för kemivetenskap (CHE); KTH/Skolan för kemivetenskap (CHE)

    Författare :Sharon Berkowicz; Helena Olsson; Henrik Broberg; [2017]
    Nyckelord :photon upconversion; sensitized triplet-triplet annihilation; anti-stokes emission; amyloid fibrils; whey protein;

    Sammanfattning : In the face of global warming and shrinking resources of fossil fuels the interest in solar energy has increased in recent years. However, the low energy and cost efficiency of current solar cells has up to this date hindered solar energy from playing a major role on the energy market. LÄS MER

  5. 5. Co-pretreatment of spruce and poplar for ethanol production - Effects of mixed feedstocks on pretreatment and enzymatic hydrolysis efficiency

    Master-uppsats, Lunds universitet/Kemiteknik (CI)

    Författare :Hanna Jovanovic; [2017]
    Nyckelord :Biofuels; Bioethanol; Second generation bioethanol; Poplar; Spruce; Enzymatic hydrolysis; Pretreatment; Lignocellulose; Chemical Engineering; Kemiteknik; Technology and Engineering;

    Sammanfattning : Oil is very important for today’s society and the transportation sector is almost completely dependent on this material. Unfortunately, it affects the level of greenhouse gases negatively which in turn contribute to global warming. LÄS MER