Essays about: "membrane permeability"

Showing result 16 - 20 of 20 essays containing the words membrane permeability.

1. 16. Protocol optimization of the filter exchange imaging (FEXI) sequence and implications on group sizes : a test-retest study

   University essay from Institutionen för informationsteknologi

   Author : Björn Lampinen; [2012]
   Keywords : DWI; diffusion; FEXI; MRI; fisher information; CRLB; active imaging;

   Abstract : Diffusion weighted imaging (DWI) is a branch within the field of magnetic resonance imaging (MRI) that relies on the diffusion of water molecules for its contrast. Its clinical applications include the early diagnosis of ischemic stroke and mapping of the nerve tracts of the brain. READ MORE

3. 17. Performance analysis of Air GapMembrane Distillation:Comparison of PTFE membranes : Comparison of PTFE membranes

   University essay from KTH/Kraft- och värmeteknologi

   Author : Daniel Baaklini; [2011]
   Keywords : Membrane distillation; air gap; flux; PTFE; backing; morphology; performance; Gurley;

   Abstract : Membrane Distillation (MD) is a very promising new technology which can be coupled with renewableenergies and/or waste heat to produce pure water at a low-cost. MD is extremely dependent upon theperformance of the membrane, as it dictates the mass transfer, the heat transfer and the long-termapplication. READ MORE

4. 18. Energetics of cholesterol-modulated membrane permeabilities. A simulation study

   University essay from Institutionen för cell- och molekylärbiologi

   Author : Christian Wennberg; [2011]
   Keywords : Molecular dynamics; permeability; cholesterol; lipid bilayer; umbrella simulation; potential of mean force;

   Abstract : Molecular dynamics simulations were used to study the permeation of four different solutesthrough different cholesterol containing lipid bilayers. In all bilayers the limiting permeationbarrier shifted towards the hydrophobic core, as the cholesterol concentration was increased. READ MORE

5. 19. Nurses’ work with HIV prevention among women at Mpongwe Mission Hospital in Zambia

   University essay from Malmö högskola/Fakulteten för hälsa och samhälle (HS)

   Author : Charlotta Simmons; Sofie Sintéus; [2011]
   Keywords : HIV; Interview; Nurse; Content analysis; Prevention; Zambia;

   Abstract : Bakgrund: Zambia är ett av de länder i världen som är värst drabbat av HIV/AIDS och sjuksköterskor i landet jobbar ständigt med att spridda preventiv information om infektionen. Kvinnor är mer sårbara då de ofta gifter sig med äldre män som redan har ett sexuellt förflutet men också p.g.a. READ MORE

6. 20. Recovery of chemicals in xylan extraction process

   University essay from Institutionen för fysik, kemi och biologi

   Author : Cathrine Nygren; [2009]
   Keywords : ;

   Abstract : Food packages containing products such as fruit juices, coffee, snacks and spices need to have barriers that can prevent oxygen, aroma substances and grease to diffuse through the packages in order to maintain or extend a certain quality of the product. Today those barriers consist of aluminium and ethylene-vinyl alcohol (EVOH) plastics, based on petroleum. READ MORE