Sökning: "permeability"

Visar resultat 21 - 25 av 650 avhandlingar innehållade ordet permeability.

1. 21. Drug Transport and Metabolism in Rat and Human Intestine

   Författare :Sofia Berggren; Hans Lennernäs; Janet Hoogstraate; Patrick Augustijns; Uppsala universitet; []
   Nyckelord :Biopharmacy; Ussing chamber; microsome; single-pass perfusion; human; rat; intestine; permeability; efflux; P-glycoprotein; metabolism; cytochrome P450; ropivacaine; lidocaine; bupivacaine; Biofarmaci; PPX;

   Sammanfattning : One of the aims of this thesis was to investigate the involvement of efflux proteins, such as the P-glycoprotein (Pgp), in the drug transport in different regions of the rat and the human intestine. The intestinal extrusion of intracellularly formed CYP3A4 metabolites, including whether this extrusion might be mediated by Pgp, was also studied. LÄS MER

3. 22. The mechanisms controlling heat and mass transfer on frying of beefburgers

   Författare :Bea Kovácsné Oroszvári; Livsmedelsteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Livsmedelsteknik; Food and drink technology; permeability; porosity; contraction; frying; beefburger; heat and mass transfer;

   Sammanfattning : The aim of the present work was to gain better understanding of the mechanisms controlling heat and mass transfer during thermal processing of beefburgers. The effects of different factors such as the chemical composition and comminution of the meat raw material, the pan temperature and the meat patty diameter on the characteristics of heat and mass transfer were studied. LÄS MER

4. 23. Vascular mechanisms in ovulation

   Författare :Kenrokuro Mitsube; Göteborgs universitet; []
   Nyckelord :angiotensin; blood flow; nitric oxide; ovary; ovulation; permeability; permselectivity; rat.;

   Sammanfattning : Ovulation is a unique biological process, which involves the degradation and rupture of healthy tissue of the ovarian follicle and the extrusion of the oocyte. This process is initiated by the preovulatory surge of luteinizing hormone (LH), which leads to the up-regulation of various intraovarian mediators. LÄS MER

5. 24. Influence of Composition and Pore Geometry on Immiscible Fluid Flow through Greensands: Development of Neutron Transmission Methods and Image Analysis

   Författare :Mikael Solymar; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; pore geometry; image analysis; fluid flow; petrography; greensand; porosity; glauconite; permeability; neutron transmission methods; fluid saturation;

   Sammanfattning : The effect of the mineralogical composition and pore geometry of sediments on the distribution as well as the flow of immiscible fluids are of importance when evaluating petroleum reservoirs. Greensand containing the clay mineral glauconite is a complex reservoir rock type. LÄS MER

7. 25. Mathematical and Experimental Study on Filtration of Solid Inclusions from Molten Aluminium and Steel

   Författare :Shahin Akbarnejad; Pär Jönsson; Dong-Yuan Sheng; Björn Glaser; Torbjörn Carlberg; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Filtration; Porous Media; Permeability; Water modeling; Fluid Bypassing; Stacked Filters; Ceramic Foam Filter; Monolithic Ceramic Filter; Alumina CFF; Particle Tracing; Aluminum Filtration; Steel Filtration; CFD; Alumina Inclusion; Filtrering; porösa medier; permeabilitet; vattenmodellering; vätskebypass; staplade filter; keramiskt skumfilter; monolitiskt keramiskt filter; aluminiumoxid CFF; partikelspårning; aluminiumfiltrering; stålfiltrering; CFD; aluminiumoxidinkludering; Materials Science and Engineering; Teknisk materialvetenskap;

   Sammanfattning : Aluminum and steel have been the most produced metal and alloy, respectively, for many years. Their extensive use in various industries, their fundamental role in our everyday life, and their excellent recycling characteristics are the major driving forces for development of their production towards more sustainable processes. LÄS MER