selective permeability


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selective permeability

or

differential permeability

the capacity of a membrane to allow some particles to pass through but not others. Such ‘differentially permeable’ membranes (e.g. CELL MEMBRANE, cellular organelle membrane, TONOPLAST) allow water molecules to pass readily through them, whereas solutes dissolved in water can pass less rapidly or not at all. The ability of molecules to travel across the membrane and the velocity with which they do so is dependent on the fat solubility, size, and charge of the molecules. An extreme example of differential permeability is a semipermeable membrane which is almost completely impermeable to solute molecules, but is permeable to the solvent.Such membranes, however, are rare.see ACTIVE TRANSPORT.
References in periodicals archive ?
In the MAP treatment, the CO2 concentration was lower than in the CC treatment, indicating the selective permeability of the polymer to CO2 (Exama et al.
By its selective permeability the unique packaging structure is moisture permeable whilst having an oxygen barrier, thus a real breakthrough technology in cheese ripening: bringing economics while substantially improving the footprint of cheese production.
For cell and developmental biologists wanting the specifics of how cells interact in multicellular organisms, this text covers such activities, which reach back over 600 million years and are fundamental to tissue integrity and the functions of selective permeability and intercellular transport.

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