The role of the density gradient depends on its sign.

Such a density gradient may be continuous or prepared in a stepped manner.

A variation of this method makes use of a density gradient column.

Density gradient is a spatial variation in density over an area.

Perturbations caused by density gradients and winds will be backed out from these measurements.

A blood donation technique called Pheresis involves density gradient separation.

"Yes, due to the refraction effect from the density gradient of the thick atmosphere," Percy said.

For density gradient centrifugation, the product is known as OptiPrep.

As neurogenesis occurs, a density gradient of neuronal cells appears in the body.

In the physical world this is difficult to observe due to the presence of many other current driving forces (i.e. pressure and density gradients).

The tube contains an insert that prevents the mixing of the density gradient medium and blood.

It sediments as a distinct band in caesium chloride density gradients.

The temperature gradient alone causes a density gradient that decreases with depth.

The blood was separated by density gradient, which left a population of cells enriched in lymphocytes and monocytes.

As a general rule, establishing density gradients between miscible substances is very tricky, because they are inherently unstable.

The density gradient goes from high to low from the proximal to the distal end of the Hydra.

The term refers to the movement of water over large distances as a consequence of global oceanic density gradients.

The caesium chloride molecules sink to the bottom of the test tubes creating a density gradient.

That was no lengthy descent, as steep as the density gradient is under Imhotepan gravity.

The simplest configuration in principle (although not in practice) is a flow with uniform velocity and density gradients.

Green flashes are enhanced by mirage, which increase the density gradient in the atmosphere and therefore, increase refraction.

A dense atmosphere under strong gravity has a high density gradient, therefore a high temperature gradient.

The carriers move in the direction of decreasing concentration, so for electrons a positive current results for a positive density gradient.

(2006) Sinking velocities of phytoplankton measured on a stable density gradient by laser scanning.

After amputation, regeneration occurs and the neuron density gradient is reestablished along the Hydra.