Sökning: "ultraviolet radiation"

Visar resultat 1 - 5 av 102 avhandlingar innehållade orden ultraviolet radiation.

  1. 1. Ultraviolet Radiation Cataract

    Detta är en avhandling från Stockholm : Karolinska Institutet, Dept of Clinical Neuroscience

    Författare :Konstantin Galichanin; Karolinska Institutet.; Karolinska Institutet.; [2012]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; lens;

    Sammanfattning : Cataract is the leading cause of blindness in the world. Epidemiological and experimental evidence supports a link between mid-range ultraviolet radiation (UVR-B) exposure and the development of cataract. LÄS MER

  2. 2. Cataract from ultraviolet radiation

    Detta är en avhandling från Stockholm : Karolinska Institutet, Department of Clinical Sciences

    Författare :Stefan Löfgren; Karolinska Institutet.; Karolinska Institutet.; [2001]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cataract; ultraviolet radiation; lens; rat; transmittance; pigment; age; pupil size.;

    Sammanfattning : Cataract is the major cause of low vision and blindness in the world. Epidemiological and experimental studies link cataract to (solar) ultraviolet radiation (UVR) exposure. Current safety limits of UVR exposure are based on animal experiments, but many factors are less well known in UVR cataractogenesis. LÄS MER

  3. 3. Ultraviolet radiation and cornea

    Detta är en avhandling från Stockholm : Karolinska Institutet, -

    Författare :Alexander Podskochy; Karolinska Institutet.; Karolinska Institutet.; [2002]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Cornea; UVR; keratocytes; apoptosis; Fas ligand; hyaluronan; biglycan; rabbit; wound healing.;

    Sammanfattning : Results. UVR at subthreshold doses did not produce any corneal damage that could be detected in the light microscope. Apoptosis was detected to be one important mechanism leading to corneal cell damage after UVR exposure at photokeratitis doses. Photokeratitis doses at 270, 280, and 290 inn led to a superficial corneal damage. LÄS MER

  4. 4. Effects of ultraviolet radiation on marine phytoplankton

    Detta är en avhandling från Section of Plant Physiology, Lund University, P.O. Box 117. S-221 00 Lund Sweden

    Författare :Tom Nielsen; [1996]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; UV-B; UV-A; Ultraviolet radiation; Phytoplankton; Photosynthesis; Ozone depletion PAR; Oxygen evolution; Motility; Marine ecosystem; Humic substances; Growth rate; Dinoflagellate; Carbon uptake; Diatom; Botany; Botanik; Electromagnetism; optics; acoustics; Elektromagnetism; optik; akustik;

    Sammanfattning : This thesis examines the effects of artificial and solar ultraviolet radiation on photosynthesis, growth rate, phototactic orientation and motility of marine phytoplankton. The effects of UV-B (280-320 nm) radiation in combination with humic substances, as well as the ability of the organisms to adapt and/or recover from exposure to UV-B radiation, were also investigated. LÄS MER

  5. 5. Optical Studies For Synchrotron Radiation Beamlines

    Detta är en avhandling från MAX IV Laboratory, Lund University

    Författare :Walan Grizolli; Lunds universitet.; Lund University.; Lunds universitet.; Lund University.; [2015]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Synchrotron Radiation; Optics; X-ray Optics; Beamline; Polarimetry; Coherence; Storage Rings; Diffraction Limited Storage Rings;

    Sammanfattning : Popular Abstract in English Among the large variety of experiments performed in science, a common one is to pass a light beam through a sample, the object to be studied, and to study the outcomes of the light-sample interaction. Many light sources have been used for this purpose, like light bulbs and lasers. LÄS MER