concentration gradient


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Related to concentration gradient: active transport, Facilitated diffusion

den·si·ty gra·di·ent

a solution in which the concentration (density) of a solute increases in a continuous fashion from top to bottom, or end to end, of a container (for example, the centrifuge tube in density-gradient centrifugation).

concentration gradient

a difference in the concentration of a substance on two sides of a permeable barrier.

concentration gradient

The difference in the amounts of a substance on either side of a membrane or in two areas of a biological system. Substances diffuse down a concentration gradient, from the area of higher concentration to lower concentration.
See also: gradient

concentration gradient

a system that is set up where the concentration of any SUBSTRATE (usually in the form of ions or molecules) is different with respect to the concentration elsewhere in the system. For example, ionic concentration across cell membranes, solutes in sap.
References in periodicals archive ?
This result represents the first task of the present paper: to infer the concentration gradient law governing any diffusion process as a consequence of the fundamental eq.
Another way to alter the concentration gradient for the diffusion of oxygen is to increase the percentage of inspired oxygen.
Additionally, oxygen in the dissolved state establishes concentration gradients between plasma and erythrocytes, and between plasma and the interstitium.
The rate of pressure buildup in the osmometers over the 10-hour period is directly related to solute concentration differences across the membranes; the larger the solute concentration gradient, the more rapidly the pressure increases inside the osmometer.
Concentration gradients for monoamine metabolites in lumbar cerebrospinal fluid.
With increasing copper concentration in the solder, the rate of dissolution decreases because of the concentration gradient reduction.
By simple microbiological experiments according to ASTM D 5590 performed on multilayered paint film species and with different biocide concentration gradients over the cross section, it can be demonstrated that:
The S-parameter obtained by DBES exhibited a three-layer depth profile, which is attributed to the presence of a "skin" layer in the polymer matrix of the primer and a concentration gradient in the inorganic phases distributed through the primer.
The model considers transport of ion due to concentration gradient, electric potential and applied pressure and describes fluid flow and potential distribution inside the capillary.
Weiss and his colleagues placed the signal-generating cells in the middle of a lab dish where they produced a concentration gradient that diminished toward the dish edges.
8 mmol/L) but high transtubular potassium concentration gradient (TTKG: 9.
Gas diffusion rate is proportional to the concentration gradient according to Fick's 1st Law (Eqn 1) (Glinski and Stepniewski 1985; Ghildyal and Tripathi 1987).

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