gradient


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Related to gradient: concentration gradient, divergence

gradient

 [gra´de-ent]
rate of increase or decrease of a variable value, or its representative curve.
edge gradient in radiology, the penumbra or partial shadow on a radiograph caused by the three-dimensional shape of an object.
electrochemical gradient the difference in ion concentration and electrical potential from one point to another, so that ions tend to move passively along it.

gra·di·ent

(grā'dē-ĕnt),
Rate of change of temperature, pressure, magnetic field, or other variable as a function of distance, time, or other continuously changing influence.

gradient

/gra·di·ent/ (gra´de-ent) rate of increase or decrease of a variable value, or its graphic representation.
electrochemical gradient  a difference in ion concentration between two points so that ions tend to move passively along it.

gradient

(grā′dē-ənt)
n. Abbr. grad.
1. A rate of inclination; a slope.
2. An ascending or descending part; an incline.
3. Physics The rate at which a physical quantity, such as temperature or pressure, changes in response to changes in a given variable, especially distance.
4. Biology A series of progressively increasing or decreasing differences in the growth rate, metabolism, or physiological activity of a cell, organ, or organism.

gradient

[grā′dē·ənt]
Etymology: L, gradus, step
1 the rate of increase or decrease of a measurable phenomenon, such as temperature or pressure.
2 a visual representation of the rate of change of a measurable phenomenon; a curve.

gra·di·ent

(grā'dē-ĕnt)
Rate of change of temperature, pressure, or other variable, as a function of factors of distance or time.

gra·di·ent

(grā'dē-ĕnt)
Rate of change of temperature, pressure, magnetic field, or other variable as a function of distance, time, or other continuously changing influence.

gradient

rate of increase or decrease of a variable value.
References in periodicals archive ?
This study introduces a novel parametric statistical gradient distribution model as an empirical result from face image data base.
Mean percentage of sperm concentration after processing in density gradient procedure was 57.
In order to demonstrate how the locus of the position of the centre of mass of a two-axled, rigid vehicle varies whilst undergoing a gradient transition, we shall provide a series of examples beginning with a simple, albeit unrealistic, right angle step climbing exercise.
My whole career is based on this idea of weight of evidence, or systematic review," said Goodman, who along with colleagues at Gradient has looked at dozens of different ways of conducting such reviews.
To determine whether gradient shifts could be produced toward either symmetrical or asymmetrical faces, the stimulus selected for S- was also varied.
My preferred method uses the DBE tool (PROCESS > BaclcgroundModelization > DynamicBackgroundExtraction), which I find to be the most flexible and user-friendly gradient removal method available to amateurs today.
In a third test, they created a gradient of crosslink density within the hydrogels.
Keywords Emulsion polymerization, Gradient latex particle, Sequence distribution, Nuclear magnetic resonance
But some biologists have raised questions about the theory, which contends that physical features are necessarily tied to absolute concentrations of proteins within the morphogen gradient.
Using numerical calculations the influence on the gradient of electric field of each microelectrode's size parameter when the other two size parameters are altered was investigated.