- (diffusion.)The process whereby solutes are transported at the microscopic level due to variations in the solute concentrations within the fluid phases . The kinetic energy generated by the transport of ionic or molecular constituents results in some dispersion of a chemical.
A Lexicon of Cave and Karst Terminology with Special Reference to Environmental Karst Hydrology. Courtesy of the author & The Karst Waters Institute. 2002.
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Molecular diffusion — This article is about spontaneous dispersion of mass. For a more generic treatment of diffusion, see Diffusion. Diffusion from a microscopic and macroscopic point of view. Initially, there are solute molecules on the left side of a barrier… … Wikipedia
molecular diffusion — molekulių difuzija statusas T sritis fizika atitikmenys: angl. molecular diffusion vok. molekulare Diffusion, f rus. молекулярная диффузия, f pranc. diffusion moléculaire, f … Fizikos terminų žodynas
molecular diffusion, coefficient of — The component of mass transport flux of solutes (at the microscopic level) due to variations in solute concentrations within the fluid phases. Synonymous with diffusion coefficient  … Lexicon of Cave and Karst Terminology
diffusion coefficient — (= diffusion constant) For the translational diffusion of solutes, diffusion is described by Fick s First Law, that states that the amount of a substance crossing a given area is proportional to the spatial gradient of concentration and the… … Dictionary of molecular biology
Diffusion (disambiguation) — Diffusion is a time dependent random process causing a spread in space. Diffusion may also refer to: In physical sciences Molecular diffusion, spontaneous dispersion of mass (distinct from migration, caused by an external force) Conduction of… … Wikipedia
Diffusion — This article is about the generic concept of the time dependent random process. For other uses, see Diffusion (disambiguation). Diffusion describes the spread of particles through random motion from regions of higher concentration to regions of… … Wikipedia
diffusion moléculaire — molekulių difuzija statusas T sritis fizika atitikmenys: angl. molecular diffusion vok. molekulare Diffusion, f rus. молекулярная диффузия, f pranc. diffusion moléculaire, f … Fizikos terminų žodynas
diffusion potential — Potential arising from different rates of diffusion of ions at the interface of two dissimilar fluids; a junction potential … Dictionary of molecular biology
diffusion coefficient — See molecular diffusion, coefficient of … Lexicon of Cave and Karst Terminology
Diffusion-controlled reaction — Diffusion controlled (or diffusion limited) reactions are reactions that occur so quickly that the reaction rate is the rate of transport of the reactants through the reaction medium (usually a solution). As quickly as the reactants encounter… … Wikipedia