enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Aquifer - Wikipedia

    en.wikipedia.org/wiki/Aquifer

    The term "perched" refers to ground water accumulating above a low-permeability unit or strata, such as a clay layer. This term is generally used to refer to a small local area of ground water that occurs at an elevation higher than a regionally extensive aquifer.

  3. Permeability (materials science) - Wikipedia

    en.wikipedia.org/wiki/Permeability_(Materials...

    The global proportionality constant for the flow of water through a porous medium is called the hydraulic conductivity (K, unit: m/s). Permeability, or intrinsic permeability, ( k , unit: m 2 ) is a part of this, and is a specific property characteristic of the solid skeleton and the microstructure of the porous medium itself, independently of ...

  4. Permeation - Wikipedia

    en.wikipedia.org/wiki/Permeation

    Permeation will occur over time with the tires, so it is best to know the permeability of the material that will make up the tire with the desired gas to make the most efficient tires. Insulating material: Water vapour permeation of insulating material is important as well as for submarine cables to protect the conductor from corrosion.

  5. Reverse osmosis - Wikipedia

    en.wikipedia.org/wiki/Reverse_osmosis

    The membrane assembly consists of a pressure vessel with a membrane that allows feedwater to be pushed against it. The membrane must be strong enough to withstand the pressure. RO membranes are made in a variety of configurations. The two most common are spiral-wound and hollow-fiber. Only part of the water pumped onto the membrane passes through.

  6. Perm (unit) - Wikipedia

    en.wikipedia.org/wiki/Perm_(unit)

    The metric perm (not an SI unit) is defined as 1 gram of water vapor per day, per square meter, per millimeter of mercury. 1 metric perm = 1.51735 U.S. perms

  7. Hydrogel - Wikipedia

    en.wikipedia.org/wiki/Hydrogel

    A hydrogel is a biphasic material, a mixture of porous and permeable solids and at least 10% of water or other interstitial fluid. [1] [2] The solid phase is a water insoluble three dimensional network of polymers, having absorbed a large amount of water or biological fluids.

  8. Permeability - Wikipedia

    en.wikipedia.org/wiki/Permeability

    Permeability, permeable, and semipermeable may refer to: Chemistry Drug permeability ... Hydraulic conductivity, the permeability of soil for water; Electromagnetism

  9. Semipermeable membrane - Wikipedia

    en.wikipedia.org/wiki/Semipermeable_membrane

    The phospholipid bilayer is most permeable to small, uncharged solutes. Protein channels are embedded in or through the phospholipids, [4] and, collectively, this model is known as the fluid mosaic model. Aquaporins are protein channel pores permeable to water.