Search for dissertations about: "Ryggradsdjur"

Showing result 1 - 5 of 30 swedish dissertations containing the word Ryggradsdjur.

  2. 1. A systematic revision of the Neotropical catfish genus Rhamdia (Teleostei, Pimelodidae)

    Author : Anders M. C. Silfvergrip; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ryggradsdjur; Vertebrata; Systematik;

    Abstract : .... READ MORE

  4. 2. Diversity and Limits of Colour Vision in Terrestrial Vertebrates

    Author : Lina Roth; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Reptiles; Dim light vision; Colour vision; Camera-type eyes; Vertebrates; Mammals; Geckos; Horses;

    Abstract : Most terrestrial vertebrates have colour vision, some perceive a less colourful world and others actually discriminate a wider colour spectrum than humans do. Still, we can all make use of the valuable colour information, which is more rigid than just brightness. READ MORE

  5. 3. Evolution of Vertebrate Eyes: a study on lens suspension and optical proterties

    Author : Ola Gustafsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; evolution; eye; fish; crystalline lens; lens suspension; multifocal optical systems; Agnatha; Actinopterygii; Chondrichthyes; Vertebrate; Sarcopterygii;

    Abstract : Many fishes have well-developed visual systems with color vision capabilities. The crystalline lens is the major refractive element in a fish eye since the cornea is optically inactive underwater. A typical fish eye has a large pupil and a lens of short focal length, features that increase light gathering ability. READ MORE

  6. 4. The ubiquity and type diversity of papillomaviruses in normal skin

    Author : Annika Antonsson; Malmö Klinisk mikrobiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Microbiology; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi; skin phylogeny; HPV prevalence; HPV type detrmination; PCR; human papillomavirus; HPV;

    Abstract : Papillomaviruses are a diverse, epitheliotropic group of viruses. Some genotypes are the main cause of anogenital cancer in humans; others can induce skin lesions. In order to investigate the occurrence of subclinical skin infections with human papillomavirus (HPV), a pair of degenerate primers (FAP59/64) was designed. READ MORE

  7. 5. The optic tectum of the salmon:site of interaction of neurohormonal photoperiodic and neural visual signals. The GABAergic neuronal system and melatonin receptors

    Author : Marie Anzelius; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal anatomy; melatonin receptors; GABA; optic tectum; fish; brain; animal morphology; Djurs anatomi och morfologi;

    Abstract : Melatonin is a neurohormone which mediates photoperiodic signals from the pineal organ to the brain. GABA (g-aminobutyric acid) is the major inhibitory transmitter in the central nervous system. READ MORE