Essays about: "membrane permeability"

Showing result 11 - 15 of 20 essays containing the words membrane permeability.

1. 11. Membrane evaluation and thermal modelling of the vanadium redox flow battery

   University essay from Lunds universitet/Kemiteknik (CI)

   Author : Anders Kronander; [2016]
   Keywords : thermodynamics; Thermal; Simulation; Energy storage solutions; Modelling; VRB; Vanadium; Battery; chemical engineering; kemiteknik; Technology and Engineering; Chemistry;

   Abstract : In this study, different membranes were tested for their use in a vanadium redox flow battery (VRB). The membranes were first tested under charge-discharge operation of the VRB over four charge-discharge cycles at different current densities (20 mAcm-2, 40 mA cm-2 and 60 mAcm-2) and the corresponding cell performance was evaluated in terms of total energy efficiency (EE), coulombic efficiency (CE) and voltage efficiency (VE). READ MORE

3. 12. A GIS analysis of electricity production using pressure retarded osmosis in the Nordic countries

   University essay from Uppsala universitet/Institutionen för geovetenskaper

   Author : David Jirout; [2015]
   Keywords : osmotic power; pressure retarded osmosis; sustainable development; carbon neutral renewable energy; GIS; NORDEL;

   Abstract : Osmotic power is an unexploited source of renewable energy that is based on mixing two types of water with a different salinity gradient. Osmotic power production (if life-cycle analysis of all necessary components is ignored) does not emit greenhouse gases to the atmosphere as opposed to fossil fuels employed in electricity production today, thus osmotic power does not systemically contribute to global warming and climate change. READ MORE

4. 13. Building predictive unbound brain-to-plasma concentration ratio (Kp,uu,brain) models

   University essay from Lunds universitet/Examensarbeten i bioinformatik

   Author : Srinidhi Varadharajan; [2014]
   Keywords : Biology and Life Sciences;

   Abstract : Abstract The blood-brain barrier (BBB) constitutes a dynamic membrane primarily evolved to protect the brain from exposure to harmful xenobiotics. The distribution of synthesized drugs across the blood-brain barrier (BBB) is a vital parameter to consider in drug discovery projects involving a central nervous system (CNS) target, since the molecules should be capable of crossing the major hurdle, BBB. READ MORE

5. 14. Effects of Varying Sludge Quality on the Permeability of a Membrane Bioreactor

   University essay from KTH/Industriell ekologi

   Author : Varvara Apostolopoulou - Kalkavoura; [2014]
   Keywords : ;

   Abstract : This master thesis firstly includes a theory part describing, the conventional municipal wastewater treatment plant (WWTP) and especially the conventional activated sludge (CAS) process. As Stockholm municipality want to retrofit the current activated sludge system at Henriksdal into a membrane bioreactor (MBR), an extensive description of the MBR and its advantages and disadvantages are included. READ MORE

6. 15. Oxysterols inhibit plant Sterol methyl transferase type-1 enzyme activity in vitro

   University essay from SLU/Dept. of Plant Biology and Forest Genetics (until 131231)

   Author : Taraneh Shirazi; [2013]
   Keywords : oxysterol; sterol; sterol methyl transferase; plant secondary metabolism;

   Abstract : Sterols are important structural components of eukaryotic cell membranes, where they influence membrane fluidity and permeability. Sterols contain a four-ring structure with a hydrocarbon side-chain. The sterol composition and structure differs among plants, mammals and fungi. READ MORE