نتایج جستجو برای: donnan
تعداد نتایج: 518 فیلتر نتایج به سال:
Cellulose acetate phthalate (CAP)membrane was interacted separately with aqueous HCl solution and aqueous HCl with sodium dodecyl hydrogen sulphate (SDS) as a surfactant and their characteristic properties were determined on the basis of water content, conductance-time and membrane potential data. The possibility of electrochemical modification of cellulose acetate phthalate membrane upon immob...
Efficient recovery of ammonium, a valuable nutrient, from dilute streams is still an unsolved challenge. One possible approach to separate and simultaneously concentrate ammonium low concentration Donnan dialysis. To design process, mass transport model was utilized for both plate frame hollow fiber modules compared experiments. The chosen based on film theory, accounting resistances in the liq...
From our theoretical treatment which is an extension of the classical Donnan theory, we have estimated the rational selectivity coefficients of the carboxylic groups of the walls during exchanges of divalent ions against monovalent ones (i.e. calcium and potassium or calcium and sodium ions). These coefficients express the interactions between the different ions, those between the counter-ions ...
Individual patient data meta-analysis of randomized trials of Solitaire stent thrombectomy Bruce C.V. Campbell MBBS PhD, Michael D. Hill MD MSc, Marta Rubiera MD, Bijoy K. Menon MD MSc, Andrew Demchuk MD, Geoffrey A. Donnan MD, Daniel Roy MD, John Thornton MD, Laura Dorado MD PhD, Alain Bonafe MD, Elad I. Levy, MD, Hans-Christoph Diener MD PhD, María Hernández-Pérez MD PhD, Vitor M. Pereira MD,...
A novel work was performed for fabrication and modification of composite nanofiltration (NF) membrane by polymerization reaction between polyethyleneimine (PEI) and triphthaloyldechloride (TPC). the main purpose of this work was water treatment. polysulfone was applied as a main polymer of substrate. The result of reaction between PEI and TPC would be formation of polyamide layer on the membran...
Electrodes modified layer-by-layer by self-assembly of redox active polyelectrolytes comprised of osmium bipyridine-pyridine derivatized poly(allyl-amine) and poly(vinyl) sulfonate have been studied by EQCM, ellipsometry, cyclic voltammetry and electrochemical impedance spectroscopy in aqueous solutions of different anions and cations. Redox driven swelling by solvent exchange during oxidation,...
A mathematical model has been developed which describes the mass transfer across monovalent-ionpermselective membranes as used in an electrodialysis cell. The mass transfer model is based on the StefanMaxwell transport equations. The latters are derived in the membrane phase with two unstirred layers on each side. Donnan equilibrium is used to describe the concentration and the potential discon...
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