Sökning: "High pressure"

Visar resultat 6 - 10 av 2322 avhandlingar innehållade orden High pressure.

1. 6. Experimental Study of some Potassium and Sodium Bearing Aluminosilicates at High Temperatures and High Pressures

   Författare :Faramarz Tutti; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Phlogopite; Orthoclase; Jadeite; Albite; Calcium ferrite; Hollandite; Dehydroxylation; High temperature; High pressure; Lower mantle; Geochemistry; Geovetenskap; Earth sciences; Geovetenskap; mineralogi; petrologi och tektonik; Mineral Chemistry; Petrology and Tectonics;

   Sammanfattning : This dissertation presents the results of a high-temperature and high-pressure experimental study of some abundant aluminositicates, which are the main repositories for the two geochemically important elements, sodium and potassium, in the Earth's crust. Phase transitions of end member alkali feldspars and jadeite clinopyroxene are studied at high and ultrahigh pressures corresponding to the conditions between the transition zone and the deep Earth's lower mantle. LÄS MER

3. 7. High Blood Pressure in Children with Hydronephrosis

   Författare :Ammar Nadhom Farman Al-Mashhadi; Mattias Carlström; Gundela Holmdahl; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Blood pressure; hydronephrosis; hypertension; ambulatory blood pressure monitoring; nitric oxide; oxidative stress; pelvo-ureteric junction obstruction.; Barnkirurgi; Pediatric Surgery;

   Sammanfattning : The most common cause of secondary hypertension is intrinsic renal disease, but little is known about the influence of hydronephrosis on blood pressure. In this thesis, the risk of development of hypertension in children with hydronephrosis was studied. LÄS MER

4. 8. New Fullerene Materials Obtained in Solution and by High Pressure High Temperature Treatment

   Författare :Alexandr Talyzin; B. Sundqvist; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; fullerene; solution; high pressure; Raman spectroscopy; polymerisation; XRD; Kemi; Chemistry; Kemi; Inorganic Chemistry; oorganisk kemi;

   Sammanfattning : Crystallization of C60 and C70 from organic solution often leads to the formation of new solvates and other fullerene compounds. In the present thesis, a number of such solvates were obtained and their phase transitions studied using in situ "in solution" techniques. LÄS MER

5. 9. Pressure Ulcer Prevention : Performance and Implementation in Hospital Settings

   Författare :Eva Sving; Lena Gunningberg; Marieann Högman; Anna-greta Mamhidir; Helle Wijk; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Pressure ulcer prevention; nursing care; implementation; Trycksårsprevention; omvårdnad; implementering; Omvårdnadsforskning med samhällsvetenskaplig inriktning; Caring Sciences in Social Sciences;

   Sammanfattning : Background: Pressure ulcers are related to reduced quality of life for patients and high costs for health care. Guidelines for pressure ulcer prevention have been available for many years but the problem remains. LÄS MER

7. 10. Studies on sitting pressure and buttock microcirculation : aiming at developing an alarm in the prevention of pressure ulcers in patients with spinal cord injuries

   Författare :Johan Thorfinn; Disa Lidman; Folke Sjöberg; Henry Svensson; Linköpings universitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Blood supply; Buttocks; Hyperemia; Ischemia; Laser-Doppler flowmetry; Microcirculation; Posture physiology; Pressure; Skin blood supply; Medicine; Medicin;

   Sammanfattning : Pressure ulcers in patients with spinal cord injuries are a major problem, the prevalence in this group being reported as high as 20 – 30 percent. Most pressure ulcers develop around the pelvic girdle, and the key-contributing factor in the development of pressure ulcers is ischaemia due to longstanding pressure. LÄS MER