semipermeable membrane


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semipermeable membrane

A substance which allows solvent molecules to pass through but not solute molecules.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.semipermeable membrane - a membrane (as a cell membrane) that allows some molecules to pass through but not others
cell membrane, cytomembrane, plasma membrane - a thin membrane (a double layer of lipids) enclosing the cytoplasm of a cell; proteins in the membrane control passage of ions (like sodium or potassium or calcium) in and out of the cell; "all cells have a cell membrane"
tissue layer, membrane - a pliable sheet of tissue that covers or lines or connects the organs or cells of animals or plants
References in periodicals archive ?
The Alexandria University process uses pervaporation--separating components of a mixture by passing it through a semipermeable membrane and evaporating the liquid--eliminating the need for electricity to pump water by relying on the sun and natural processes of evaporation.
The research on IEMs began in 1890 when Ostwald [1] discovered that a semipermeable membrane could be impermeable for any electrolyte if it was impermeable either for its cation or its anion and postulated the existence of the so-called "membrane potential" at the boundary between the membrane and the solution caused by the difference in concentration.
A two-fluid flat plate LAMEE is composed of several parallel air and desiccant solution channels, where each adjacent air and solution channels are separated by a semipermeable membrane.
Round window membrane is the only soft tissue barrier separating the middle ear from the inner ear this semipermeable membrane appears to be the main portal for the passage of noxious substance from the middle ear cavity to the labyrinth.
Gareau, is that the gut is bounded by a semipermeable membrane containing hundreds of millions of microbes.
Osmotic systems consist of a hydrophilic matrix and a coated extended-release system, with polyethylene oxide polymers and inorganic salts or sugars as osmogens in the tablet core and cellulose acetate with polyethylene glycol (PEG) polymers as the semipermeable membrane coating.
Obesity and overconsumption of foods high in saturated fats and simple carbohydrates have been found to weaken the blood brain barrier (BBB), a semipermeable membrane that helps protect the central nervous system and brain from pathogens and toxins circulating in the bloodstream.
Avoid slow-release formulations, including ion-exchange resins with a semipermeable membrane and those with slowly dissolving characteristics; substitute an immediate-release formulation.
When two solutions with different salt concentrations come into contact through a semipermeable membrane, these solutions 'want' to mix so that the concentration of salt is the same on both sides of the membrane--a natural process called osmosis.
In addition to the danger of direct intravenous bacterial inoculation, the small molecular size of endotoxin and endotoxin fragments produced by bacteria enables them to pass through the semipermeable membrane of a dialyzer from the dialysate compartment.
In nanofiltration (NF), a pressure driven membrane separation process, the separation takes place across a semipermeable membrane.
Replace the anode, cathode, and semipermeable membrane in each electrolytic cell annually.