Sökning: "DIM"

Visar resultat 1 - 5 av 32 avhandlingar innehållade ordet DIM.

1. 1. Celestial Orientation in Dim Light

   Författare :Marie Dacke; Funktionell zoologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; polarisation pattern; moon; polrised light detection; twilight; dim light; dung beetle; Zoologi; spider; vision; orientation; Zoology;

   Sammanfattning : The polarization pattern of skylight offers many animals a reference for visual compass orientation. In those cases when this optical compass is identified, the receptors involved are often confined to a small part of an eye built predominantly for other visual tasks. LÄS MER

3. 2. The function of annexin I in human neutrophils. Studies of membrane binding

   Författare :Charlotta Movitz; Göteborgs universitet; []
   Nyckelord :Human neutrophils; secretion; annexin I; grancalcin; subcellular organelles; lipid rafts; DIM;

   Sammanfattning : The neutrophil granulocyte plays an important role in host defense against infections induced by invading microorganisms. The defense mechanism is dependent on the migration of neutrophils from the blood stream to the infected area, where the intruder is phagocytosed and killed. LÄS MER

4. 3. Neurons against Noise : Neural adaptations for dim light vision in hawkmoths

   Författare :Anna Stöckl; Funktionell zoologi; []
   Nyckelord :vision; insect; hawkmoth; motion vision; spatial and temporal summation; dim light; neural processing;

   Sammanfattning : All animals perceive the world through their senses, which form the basis for their decisions and motor actions. However, when these all-important senses reach their limit and cease to provide reliable information, the animal’s survival is threatened. LÄS MER

5. 4. Bird Vision: Spatial acuity and colour discrimination in bright and dim light

   Författare :Olle Lind; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Animal vision; Visual ecology; Colour vision; Spatial acuity; Spatial contrast sensitivity; Dim light; Visual modelling; Behavioural experiments; Birds; Psittaciformes;

   Sammanfattning : Birds use vision to guide navigation, foraging and mate choice, and studies of the limitations in bird visual perception are most helpful for the understanding of bird ecology. Here, I present four studies of bird vision in bright and dim light. LÄS MER

7. 5. Adaptations for nocturnal vision in insect apposition eyes

   Författare :Birgit Greiner; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; temporal and spatial summation; optical and neural adaptations; theoretical modelling.; Djurs anatomi och morfologi; Zoologi; dim light; vision; landmark navigation; nocturnal bees and wasps; Zoology; Animal anatomy; animal morphology;

   Sammanfattning : Due to our own preference for bright light, we tend to forget that many insects are active in very dim light. The reasons for nocturnal activity are most easily seen in tropical areas of the world, where animals face severe competition for food and nocturnal insects are able to forage in a climate of reduced competition and predation. LÄS MER