semipermeable membrane

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semipermeable membrane

[¦sem·i′pər·mē·ə·bəl ′mem‚brān]
(physics)
A membrane which allows a solvent to pass through it, but not certain dissolved or colloidal substances.
References in periodicals archive ?
The semipermeable membrane allows diffusion of water molecules but prevents diffusion of solutes.
This increase in total energy performance effectiveness, compared to typical sensible energy effectiveness for heat exchangers, makes semipermeable membrane air-to-air exchangers that transfer heat and moisture a better design option to meet the increasing demands for efficient energy use in buildings.
The differences in hormone concentrations on opposite sides of semipermeable membranes and the magnitudes of hormone losses during ultrafiltration were unexpected.
Primary sludge was held in vials capped with semipermeable membranes that allowed liquid and gas to flow through the vials.
Often used to remove salts, reverse osmosis requires electricity to pump water through semipermeable membranes.