Sökning: "High pressure"

Visar resultat 1 - 5 av 1767 avhandlingar innehållade orden High pressure.

  1. 1. High-Pressure Microfluidics

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Sam Ogden; Uppsala universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase change; actuator; valve; pump; supercritical fluid; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

    Sammanfattning : In this thesis, some fundamentals and possible applications of high-pressure microfluidics have been explored. Furthermore, handling fluids at high pressures has been addressed, specifically by creating and characterizing strong microvalves and pumps.A variety of microstructuring techniques was used to realize these microfluidic devices, e.g. LÄS MER

  2. 2. High pressure vulcanization crosslinking of diene rubbers without vulcanization agents

    Detta är en avhandling från Institutionen för polymerteknologi

    Författare :Martin Bellander; KTH.; [1998]
    Nyckelord :;

    Sammanfattning : High pressure vulcanization (HPV) is defined in this thesisas crosslinking of rubber materialsat elevated pressure andtemperature, without the use of any vulcanization agents. Thisis atotally new vulcanization technique, not used in theindustry today. LÄS MER

  3. 3. Bonding veneers using only heat and pressure focus on bending and shear strength

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Carmen Cristescu; Luleå tekniska universitet.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; self-bonding; auto-adhesion; LVL; beech; Fagus Sylvatica; high-temperature; pressure; Forestry; agricultural sciences and landscape planning - Wood fibre and forest products; Skogs- och jordbruksvetenskap samt landskapsplanering - Träfiber- och virkeslära; Träteknik; Wood Technology;

    Sammanfattning : A compact laminated board can be obtained by pressing layers of veneers with no other material or substance placed between them. The process does not require the use of steam pretreatment, surface activation methods, a gastight press, friction or adhesives. It strictly involves the heat and the pressure induced by the press in the veneers. LÄS MER

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

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Faramarz Tutti; Uppsala universitet.; [2001]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Earth sciences; Phlogopite; Orthoclase; Jadeite; Albite; Calcium ferrite; Hollandite; Dehydroxylation; High temperature; High pressure; Lower mantle; Geochemistry; Geovetenskap; NATURAL SCIENCES Earth sciences; NATURVETENSKAP 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

  5. 5. High Blood Pressure in Children with Hydronephrosis

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Ammar Nadhom Farman Al-Mashhadi; Uppsala universitet.; [2018]
    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