Search for dissertations about: "lens"

Showing result 1 - 5 of 298 swedish dissertations containing the word lens.

  1. 1. Caspase-3 in lens epithelium

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Nooshin Talebizadeh; Uppsala universitet.; [2016]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ultraviolet radiation; caspase-3; lens; cataract; apoptosis; Immunohistochemistry; spatial distribution; time evolution; modelling; automatic analysis; cell counting; image analysis.; Ophtalmology; Oftalmiatrik;

    Abstract : Purpose: To model the time evolution of active caspase-3 protein expression in a healthy lens, and in a lens exposed to UVR-300 nm (UVR-B). To develop an automated method to classify the fluorescent signal of biomarkers in the lens epithelial cells.Methods: Six-week old Sprague-Dawley rats were used. READ MORE

  2. 2. A multi-prism lens for hard X-Rays

    University dissertation from Stockholm : KTH

    Author : Björn Cederström; KTH.; [2002]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; x-ray; optics; refractive; lens; mammography; synchrotron; NATURAL SCIENCES Physics; NATURVETENSKAP Fysik;

    Abstract : This thesis describes a new type of refractive lens for hardx-rays. It is shown that a linear array of prisms, slightlyinclined with respect to the optical axis, will form a linefocus at a certain distance from the lens. Hence, the namemulti-prism lens. READ MORE

  3. 3. Morphological and Physiological Adaptations in Cichlid Crystalline Lenses

    University dissertation from Stockholm : KTH

    Author : Marcus Schartau; Lunds universitet.; Lund University.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; SKF-38393; D1-agonist; optical properties 6-hydroxydopamine; optical measurements; organ culture; dopamine; teleost; lens circulation; Lens; SCH-23390; melatonin; multifocal optical system;

    Abstract : Vertebrate eyes share a common ancestry as well as the basic design with a pupil, a retina and a lens. The lens is essential for perceiving the details in the world around us and ensures that a sharp image of the surroundings is focused onto the photoreceptors in the retina. READ MORE

  4. 4. Control of early development of the lens and the retina

    University dissertation from Umeå : Umeå universitet

    Author : Tanushree Pandit; Umeå universitet.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Lens; retina; BMP; FGF; chick; Developmental Biology; miljömedicinsk utvecklingsbiologi;

    Abstract : The nervous system is composed of two separate compartments, the central and the peripheral nervous system. The peripheral nervous system (PNS) composed mainly of sensory organs transmits sensory information to the central nervous system (CNS) comprising the brain and the spinal cord. READ MORE

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

    University dissertation from Umeå : Umeå universitet

    Author : Ola Gustafsson; Lunds universitet.; Lund University.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; evolution; eye; fish; crystalline lens; lens suspension; multifocal optical systems; Agnatha; Actinopterygii; Chondrichthyes; Vertebrate; Sarcopterygii;

    Abstract : Popular Abstract in Swedish Alla ryggradsdjur har ögon av en typ som kallas kameraöga. Som man kan höra på namnet så fungerar ett sådant öga ungefär som en kamera. En lins fokuserar ljuset på ett ljuskänsligt lager som i ett öga kallas för näthinna (retina). De ljuskänsliga cellerna i näthinnan heter tappar och stavar. READ MORE