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Showing result 1 - 5 of 16 swedish dissertations matching the above criteria.

2. 1. Isotope-based source apportionment of black carbon aerosols in the Eurasian Arctic

   Author : Patrik Winiger; Örjan Gustafsson; Meinrat O. Andreae; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Black Carbon; Radiocarbon; Air Pollution; Arctic Amplification; Climate Change; Arctic Haze; Atmospheric Transport Modeling; Emission Inventory; Carbon Isotopes; Applied Environmental Science; tillämpad miljövetenskap;

   Abstract : Aerosols change the Earth's energy balance. Black carbon (BC) aerosols are a product of incomplete combustion of fossil fuels and biomass burning and cause a net warming through aerosol radiation interactions (ari) and aerosol cloud interactions (aci). READ MORE

4. 2. Inflammation and wound healing following photorefractive keratectomy

   Author : Santiago Tomás Barberán; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Photorefractive keratectomy; excimer laser; inflammation; flare; prostaglandins; diclofenac; dexamethasone; pain; epithelial healing; corneal topography; growth factors; metalloproteinases; collagen; haze; haze distribution; Scheimpflug system; Laser Flare Meter; regression; reoperation; wound healing;

   Abstract : This study comprises different aspects on the inflammatory and wound healing responses of the eye after Photorefractive Keratectomy (PRK). The purpose was to provide basic information about the inflammatory reaction and the wound healing after surgery. PRK is considered a good technique for surgical correction of and moderate myopia. READ MORE

5. 3. Refractive surgery with the ArF excimer laser (photorefractive keratectomy) : surgical technique, wound healing and refractive results

   Author : Heléne Hamberg-Nyström; Karolinska Institutet; Karolinska Institutet; []
   Keywords : Photorefractive keratectomy; excimer laser; comparison; centration; contrast sensitivity; night vision; endothelial cell; epithelial thickness; multipassmultizone; multizone; haze; saccades; hyaluronan; myopic regression; reoperation; wound healing.;

   Abstract : Excimer lasers have been adapted to treat refractive errors in the human eye since 1987. By remodeling the corneal surface, myopia and astigmatism can be corrected. The investigations herein were performed during a time period when the surgical technique development was extensive. READ MORE

6. 4. Water, hyaluronan and surface shape in corneal wound healing after excimer surgery : experimental studies

   Author : Beat A Weber; Karolinska Institutet; Karolinska Institutet; []
   Keywords : photorefractive keratectomy; excimer laser; rabbit; cornea; wound healing; microradiography; hyaluronan; planimetry; leukocyte protein marker; haze; regression; surface irregularities; subepithelial deposits; remodeling; epithelial hyperplasia; corticosteroids;

   Abstract : Excimer laser photorefractive keratectomy (PRK) has evolved to a widely performed procedure. The excimer laser corrects refractive ametropias by removing a calculated amount of anterior corneal stroma with great precision and with minimal damage to the adjacent tissues. The correction of myopia up to -5. READ MORE

7. 5. High Clay Content Cellulose Nanocomposites for Mechanical Performance and Fire Retardancy

   Author : Lilian Medina; Lars Berglund; Jeffrey W. Gilman; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; nanocellulose; nanofibril; nanofiber; CNF; nanoplatelet; nanostructure; tactoid; montmorillonite; MTM; foam; aerogel; porosity; PVA; poly vinyl alcohol ; epoxy; moisture; biocomposite; biomaterial; biobased; flame; cone calorimetry; gas barrier; coating; film.; Fiber- och polymervetenskap; Fibre and Polymer Science;

   Abstract : Materials based on wood can offer sustainable alternatives to fossil-based plastics and composites, and show interesting mechanical properties. However, the issue of their flammability is generally unresolved. In this thesis, eco-friendly, fire retardant clay-cellulose nanofibril materials are investigated. READ MORE