Search for dissertations about: "ultraviolet UVB"

Showing result 1 - 5 of 14 swedish dissertations containing the words ultraviolet UVB.

  2. 1. Thin-film ultraviolet light-emitting diodes realized by electrochemical etching of AlGaN

    Author : Michael Alexander Bergmann; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; thin-film flip-chip; light-emitting diodes; UVB; AlGaN; thermocompression bonding; substrate removal; ultraviolet light; electrochemical etching; heterogeneous integration; LEDs;

    Abstract : Ultraviolet (UV) light sources have a direct impact on everyone’s life. They are used to sterilize surfaces as well as for water purification. In addition, they are used in green houses to enhance health-promoting substances in plants, for phototherapy to treat skin diseases, for sensing and material curing. READ MORE

  4. 2. Vitamin D status in psoriasis patients treated with UVB therapy

    Author : Amra Osmancevic; Göteborgs universitet; []
    Keywords : Vitamin D; PTH; psoriasis; bone mineral density; ultraviolet UVB;

    Abstract : Vitamin D status in psoriasis patients treated with UVB therapy Amra Osmancevic Department of Dermatology and Venereology, Institute of Clinical Sciences at Sahlgrenska Academy, University of Gothenburg, Göteborg, Sweden Abstract The thesis deals with the effect of ultraviolet B (UVB) 280-320 nm on vitamin D production in psoriasis patients during treatment with phototherapy. Background: Psoriasis is a chronic, inflammatory disease affecting the skin and potentially the joints. READ MORE

  5. 3. Ultraviolet vertical-cavity surface-emitting lasers and vertical microcavities for blue lasers

    Author : Filip Hjort; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GaN; ultraviolet; microcavity; electrical conductivity; vertical-cavity surface-emitting laser; AlGaN; electrochemical etching; nanostructures; distributed Bragg reflector;

    Abstract : III-nitride materials are used for ultraviolet (UV) and visible light emitters. One such light source is the vertical-cavity surface-emitting laser (VCSEL) that could find applications within areas ranging from sterilization and medical treatment to car headlights and augmented reality displays. READ MORE

  6. 4. The role of MTH1 in ultraviolet radiation-induced mutagenesis

    Author : Asal Fotouhi; Siamak Haghdoost; Harry Vrieling; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ultraviolet radiation; MTH1; reactive oxygen species; 8-oxo-dGTP; 2-OH-dATP; micronucleus; molekylärgenetik; Molecular Genetics;

    Abstract : Ultraviolet radiation (UVR) is known to be highly mutagenic. What types of DNA lesions that are induced by different UVR wavelengths are still a matter of debate. UVR induces mutagenesis mostly by the formation of photoproducts and the induction of reactive oxygen species (ROS). READ MORE

  7. 5. Studies related to bone mass in patients with cystic fibrosis

    Author : Eva Gronowitz; Göteborgs universitet; []
    Keywords : DXA; infection; lung function; parathyroid hormone; physical activity; vitamin D; ; pQCT; UVB;

    Abstract : Cystic fibrosis is the most common genetic disease that causes respiratory failure and earlydeath. The lifespan of these patients has gradually increased due to improved generaltreatment, but concurrent with this, new complications have emerged, and changes in bonemineral density (BMD) have been stressed as a major problem. READ MORE