Diffusion: the movement of molecules of a substance from a region of higher concentration to a region of lower concentration
Disturbance: alteration of a habitat by some agent of change, natural or unnatural ...
Diffusion: The movement of a substance from an area of high concentration to an area of low concentration.
Discharge: An outflow of water from a stream, pipe, groundwater aquifer, or watershed; the opposite of recharge.
Diffusion: The movement of gas molecules or aerosols into liquids, caused by a concentration gradient.
Digester: A closed tank for wastewater treatment, in which bacterial action is induced to break down organic matter.
diffusion
Spontaneous differential movement of components in a system.
Note: In molecular terms, the driving force for diffusion is random thermal motion. In thermodynamic terms, the driving force is a gradient of chemical potential.
[2] ...
Diffusion
The movement of suspended or dissolved particles (or molecules) from a more concentrated to a less concentrated area. The process tends to distribute the particles or molecules more uniformly.
Digester ...
diffusion 1) The process by which both ionic and molecular species dissolved in water move from areas of higher concentration to areas of lower concentration. 2) The scattering of light.
Eddy Diffusion - The exchange of gaseous components of the atmosphere in a turbulent flow by rapid mixing of fluid eddies. [Journal of Marine Research; v. 52; p.129-148;1994.] [Journal of Atmospheric and Terrestrial Physics; v. 54, 148; 1992.] ...
Diffusion: The process by which molecules in a single phase equilibrate to a zero concentration gradient by random molecular motion (Brownian motion).
Urban Diffusion Model for Carbon Monoxide from Motor Vehicle Traffic
APTI
Air Pollution Training Institute ...
plume The area occupied by a ground-water contaminant after it has begun to spread, through diffusion or other forces, away from its point of origin. point source A stationary source or fixed facility from which pollutants are discharged.
ocean mixing Processes that involve rates of advection, upwelling/ downwelling, and eddy diffusion and that determine how rapidly excess atmospheric carbon dioxide can be taken up by the oceans.
Diffusion coefficient A measure of the rate of movement of solutes or gases in response to a concentration gradient in the medium in which they are dissolved. Dimorphism The existence of two distinct forms of an organism or organ, e.g.
Any exposure surface that may allow diffusion of an agent into a target. Examples of absorption barriers are the skin, lung tissue, and gastrointestinal track wall.
Definition source
Translations of "absorption barrier": ...
the movement (diffusion) of a liquid through a semipermeable membrane such as living tissue.
soil water diffusivity (capacité de diffusion de l'eau dans le sol ) The hydraulic conductivity divided by the differential water capacity (using consistent units), ...
 See also: Water, Environment, Concentration, Condition, Air
  
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