Sökning: "lenses"

Visar resultat 21 - 25 av 156 avhandlingar innehållade ordet lenses.

  1. 21. Hydrogels of Poly(vinyl alcohol) and Nanocellulose for Ophthalmic Applications : Synthesis, Characterization, Biocompatibility and Drug Delivery Studies

    Författare :Gopi Krishna Tummala; Albert Mihranyan; Natalia Ferraz; Cecilia Persson; Jonas Lindh; Che Connon; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nanocellulose; poly vinyl alcohol ; hydrogel; cornea regeneration; therapeutic lens; Engineering Science with specialization in Nanotechnology and Functional Materials; Teknisk fysik med inriktning mot nanoteknologi och funktionella material;

    Sammanfattning : Hydrogels are commonly used materials in ophthalmic care as contact lenses, bandage lenses, corneal implants, and cornea regeneration scaffolds. Hydrogels can be produced by physical, chemical, or radiation crosslinking of hydrophilic polymers. LÄS MER

  3. 22. Safety limit estimation for cataract induced by ultraviolet radiation

    Författare :Xiuqin Dong; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Ultraviolet radiation UVR ; Sprague-Dawley rat; cataract; light scattering; doseresponse function; maximum acceptable dose MAD ; maximum tolerable dose MTD ; in vivo; in vitro; age.;

    Sammanfattning : Background: Ultraviolet radiation (UVR) is considered one of the major risk factors for agerelated cataract. UVR-induced cataract follows a continuous dose-response function. LÄS MER

  4. 23. Volcanic stratigraphy and hydrothermal alteration of the Petiknäs south Zn-Pb-Cu-Au-Ag volcanic-hosted massive sulfide deposit, Sweden

    Författare :Denis Schlatter; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ore Geology; Malmgeologi;

    Sammanfattning : The Skellefte district is one of the most important mining regions in Sweden and Europe. The district contains more than 85 pyritic Zn-Cu-Au-Ag massive sulfide deposits. LÄS MER

  5. 24. Oxidative stress and proteolysis in the lens. Effects of anti-inflammatory drugs

    Författare :Anne Kling-Petersen; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; oxidation NSAIDs ASA dexamethasone apoptosis GSH GSSG proteasome lens epithelial cells mouse lens cataract;

    Sammanfattning : Oxidative stress has been implied in formation of age-related cataract. The objectives of this thesis were to study redox regulation of proteolysis and oxidative/antioxidative effects of anti-inflammatory substances in human lens epithelial cells (HLEC) and intact mouse lenses. LÄS MER

  7. 25. Sulphur Regulations for Shipping – Why a Regional Approach?: Scientific and Economic Arguments in IMO Documents 1988-1997

    Författare :Erik Svensson; Chalmers tekniska högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; costs; framing; shipping; SECA; distribution; environmental; policy environment; international; MARPOL; conceptual lens; IMO; Annex VI; regional approach; economic interests; directional problem; benefits; policy-making; SOx; science;

    Sammanfattning : Some environmental issues for shipping are regulated globally with uniform standards and others with stricter regulations in specific areas. This thesis aims to provide an understanding of why a regional approach was chosen with SOx Emission Control Areas (SECAs) as the main form of control of sulphur oxide emissions from international shipping, with explanations based on documents from negotiations within the International Maritime Organization (IMO) during 1988-1997. LÄS MER