Search for dissertations about: "Fluoride"

Showing result 16 - 20 of 154 swedish dissertations containing the word Fluoride.

2. 16. Solubility and Surface Complexation Studies of Apatites

   Author : Åsa Bengtsson; Staffan Sjöberg; Per Persson; Lars Lövgren; Laurent Charlet; Umeå universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; apatite; dissolution; calcium; phosphate; fluoride; goethite; surface complexation; speciation; outer-sphere complexation; FTIR; XPS; potentiometry; Chemistry; Kemi;

   Abstract : Apatites are a diverse class of phosphate minerals that are important in a great variety of natural and industrial processes. They are, for example, used as raw material in fertiliser production and in the remediation of metal-contaminated soils. READ MORE

4. 17. Fluoride varnish programmes for adolescents at school – caries, conceptions and costs

   Author : Eva-Karin Bergström; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; adolescents; approximal caries; caries incidence; caries increment; caries prevalence; cost-analysis; dental nurse; fluoride varnish; oral health promotion; phenomenography; population-based; school programme;

   Abstract : The overall aim of this thesis was to study the effects on caries, conceptions and costs of school-based fluoride varnish programmes for adolescents in Sweden. Paper I was a 3.5-year randomised controlled study of 1,143 adolescents, in a low caries prevalence area. READ MORE

5. 18. Crystallization of Metal Fluoride Hydrates from Mixed Acid Solutions

   Author : Kerstin Forsberg; Åke Rasmuson; Alison Lewis; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crystallization; crystal growth; b-FeF3.3H2O; iron fluoride trihydrate; CrF3.3H2O; pickling; pickle bath; hydrofluoric acid; nitric acid; stainless steel; Chemical engineering; Kemiteknik;

   Abstract : In this work crystal growth and nucleation of b-FeF3×3H2O and crystallization of chromium (III), iron (III) and nickel (II) fluoride hydrates from mixed acid (1-3 mol/kg HNO3 and 1-6 mol/kg free HF) have been investigated. The solubility of b-FeF3×3H2O has been determined in solutions of different hydrofluoric acid (1-7mol/ kg) and nitric acid (0-7mol/ kg) concentrations at 30, 40 and 50°C. READ MORE

6. 19. Lithium-ion Battery Safety - Assessment by Abuse Testing, Fluoride Gas Emissions and Fire Propagation

   Author : Carl Fredrik Larsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fire; thermal runaway; gas emission; gas explosion; propagation; safety; abuse testing; Lithium-ion; cell case explosion; hydrogen fluoride;

   Abstract : Lithium-ion batteries offer high energy and power densities as well as long life time but have a more narrow stability window compared to other battery types and contain reactive and flammable materials. In case of overheating the battery cell can release gas (vent) and, at temperatures of about 150-200 °C, a so called thermal runaway can occur, that is a rapid self-heated temperature increase which is typically accompanied with a large release of smoke and gas, fire and a potential cell case explosion or gas explosion. READ MORE

7. 20. High-fluoride Toothpaste (5000 ppm) in Caries Prevention

   Author : Anna Nordström; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Caries-active adolescents; Dental caries; Dental plaque; Dentifrice; de novo plaque formation; Frequency of brushing; High-fluoride toothpaste 5000 ppm ; Tooth-brushing; Toothpaste; Water rinsing;

   Abstract : Abstract High-fluoride Toothpaste (5000 ppm) in Caries Prevention Anna Nordström, Department of Cariology, Institute of Odontology, Sahlgrenska Academy, University of Gothenburg, Box 450, SE-405 30 Göteborg, Sweden. Dental caries is a common disease in a large number of individuals. READ MORE