permeable membrane


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Related to permeable membrane: Partially permeable membrane

permeable membrane

[′pər·mē·ə·bəl ′mem‚brān]
(chemistry)
A thin sheet or membrane of material through which selected liquid or gas molecules or ions will pass, either through capillary pores in the membrane or by ion exchange; used in dialysis, electrodialysis, and reverse osmosis.
References in periodicals archive ?
Selectively Permeable Membrane Based Chemical/Biological Protective Field Duty Uniform -- Quoc Truong, Eugene Wilusz
A permeable membrane, such as Mypex, is best of all as the water gets through, but the light doesn't.
Worms can also migrate into the bile ducts and the permeable membrane that covers the abdominal organs.
Their technique is based on the process of osmosis - the natural movement of water from a region with low solute concentration across a permeable membrane to a region with high concentration.
Preparing the site Remove all turf, cover the ground with a permeable membrane or black polythene and then gravel, to prevent weeds from growing.
Fix timbers around the edge, lay a permeable membrane over the area to suppress weeds and put down a 2in layer of gravel.
A further six will also be put forward for the work, which involves digging out half a metre of topsoil and putting down a permeable membrane before replacing it with clean soil.
A permeation dryer passes the sample over a selectively permeable membrane for moisture removal, transferring water through the membrane as a vapour so that condensate does not form during the dying process.
When a direct current (DC) is passed through the cell, the cations migrate from the diluting compartment through the cation permeable membrane toward the cathode; the anions migrate toward the anode through the anion permeable membrane.
The permeable membrane of the autoclave bags allows free flow of C[O.
It is laminated with Tetratex Release--a highly permeable membrane which acts as a primary dust cake and is suitable for use where dust particles are primarily larger than 5 microns.
Natick project engineer George Costas said that one of the most promising technologies for future protective garments is the selectively permeable membrane.