Donnan equilibrium
An equilibrium established between a charged, immobile colloid (such as clay, ion exchange resin or cytoplasm) and a solution of electrolyte. Characteristics: ions of like charge to the colloid tend to be excluded; ions of opposite charge tend to be attracted; the colloid compartment is electrically polarized relative to the solution in the same direction as the colloid charges (a "Donnan potential") ; and the osmotic pressure is higher in the colloid compartment.

Dictionary of molecular biology. 2004.

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  • Donnan equilibrium — Donano pusiausvyra statusas T sritis chemija apibrėžtis Pusiausvyra tarp jonų, esančių abiejose puslaidės membranos pusėse arba tarp jonų, esančių tirpale ir jonitinėje membranoje. atitikmenys: angl. Donnan equilibrium rus. доннановское… …   Chemijos terminų aiškinamasis žodynas

  • Donnan equilibrium — Don·nan equilibrium dän ən n the ionic equilibrium reached in a solution of an electrolyte whose ions are diffusible through a semipermeable membrane but are distributed unequally on the two sides of the membrane because of the presence of a… …   Medical dictionary

  • donnan equilibrium — ˈdänən noun Usage: usually capitalized D Etymology: after Frederick G. Donnan died 1956 British chemist and physicist : the ionic equilibrium reached in a solution of an electrolyte whose ions are diffusible through a semipermeable membrane but… …   Useful english dictionary

  • Donnan equilibrium (effect) — Don·nan equilibrium (effect) (donґən) [Frederick George Donnan, English chemist, 1870–1956] see under equilibrium …   Medical dictionary

  • Gibbs-Donnan equilibrium (effect) — Gibbs Don·nan equilibrium (effect) (gibzґ donґən) [J.W. Gibbs; Frederick George Donnan, English chemist, 1870–1956] Donnan equilibrium …   Medical dictionary

  • Gibbs-Donnan equilibrium — Donnan e …   Medical dictionary

  • Donnan potential — appears as a result of Donnan equilibrium, named after Frederick G. Donnan, which refers to the distribution of ion species between two ionic solutions separated by a semipermeable membrane or boundary. The boundary layer maintains an unequal… …   Wikipedia

  • Donnan — can refer to: Saint Donnan Frederick G. Donnan, chemist Donnan equilibrium Harry Donnan, Australian cricketer Donnan, Iowa, a community in the United States This disambiguation page lists articles associated with the same title. If an …   Wikipedia

  • Equilibrium — is the condition of a system in which competing influences are balanced and it may refer to:cienceBiology* Equilibrioception, the sense of balance present in humans and animals * Homeostasis, the ability of an open system, especially living… …   Wikipedia

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