Search for dissertations about: "Freeze-thaw"

Showing result 16 - 20 of 55 swedish dissertations containing the word Freeze-thaw.

2. 16. Artificial Ground Freezingin Clayey Soils : Laboratory and Field Studies of Deformations During Thawing at the Bothnia Line

   Author : Teddy Johansson; Staffan Hintze; Håkan Stille; Sven Knutsson; Kauko Kujala; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Artificial ground freezing; AGF; thaw deformation; deformation; thawing; frost heaving; Bothnia Line.; Artificiell markfrysning; artificiell jord- och bergfrysning; AGF; tiningsdeformation; deformation; tining; tjälhävning; Botniabanan; Geoengineering; Geoteknik;

   Abstract : Artificial ground freezing as a method to temporarily stabilize and create hydraulic sealing in urban as well as in rural areas has been used in a number of Swedish construction projects, particularly during the last decade. One problem with the freezing of soil and rock is that fine-grained clayey types of soils have showed a tendency to under certain circumstances, during the thawing process, create a pore water overpressure and to consolidate, despite a change in the external loading conditions. READ MORE

4. 17. Northern peatland carbon biogeochemistry : the influence of vascular plants and edaphic factors on carbon dioxide and methane exchange

   Author : Mats Öquist; Bo Svensson; Joseph B. Yavitt; Linköpings universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Biogeokemi; Biologi; Autekologi; Klimatologi; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Abstract : The interest in carbon dynamics and the interactions between ecosystems and the atmosphere has increased during the last decade due to the postulated threat of anthropgenically induced global and climate change. Northern peatlands, with their large stores of organic carbon and long-term net accumulation of atmospheric carbon dioxide are key ecosystems in these interactions. READ MORE

5. 18. Basal cell carcinoma: real-life burden on healthcare and simplified destructive treatments

   Author : Eva Johansson Backman; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Basal cell carcinoma; Cryosurgery; Curettage; Dermoscopy; Epidemiology; Randomized controlled trial; Mixed methods study; Cosmetic outcome;

   Abstract : Basal cell carcinoma (BCC) is the most common cancer in humans. With steadily increasing incidence rates, there is a constant need to evaluate current diagnostic methods and treatment alternatives to achieve effective care for the patients while considering available healthcare funding. READ MORE

6. 19. Chromatographic characterization of the human red cell glucose transporter Glut1 in the cells, in membrane vesicles and in proteoliposomes

   Author : Andreas Lundqvist; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biochemistry; Biokemi; Biochemistry; Biokemi; biokemi; Biochemistry;

   Abstract : The human glucose transporter Glut1 is used by many cells, especially red blood cells andbrain cell, to take up glucose and other necessary metabolites. Gentle chromatographic methods can be applied for analyses of Glut1 activities in lipid environments similar to the native one. READ MORE

7. 20. Methods for measurements of chlorophyll fluorescence, luminescence and photosynthesis in intact plants

   Author : Erik Sundbom; Thor Bernt Trondheim Melö; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Luminiscence; delayed light emission; phytoluminography; fluorescence; in vivo chlorophyll a^ fluorescence; photosynthesis; electron transport; frost tolerance; intact plants; Physiological Botany; fysiologisk botanik;

   Abstract : Methods were developed to study delayed light emission (luminiscence) and fluorescence changes in intact leaves of plants. Delayed light emission, detected from plants in darkness, was used to produce images of the plant leaves. The procedure was termed "phytoluminography". READ MORE