See Also: grenz ray(medicine)
grenz zone(medicine)
Herbal medicine (botanical medicine, herbology, phytomedicine)(health)
Medicine Lodge Memorial Hospital- Medicine Lodge(health)
Concentration(money)
Concentration(medicine)
concentration(dictionary)
M concentration(medicine)
concentration(dictionary)
critical concentration(medicine)

concentration gradient (medicine) and grenz ray (medicine)


concentration gradient (medicine)


concentration gradient -->
density gradient
<chemistry> A column of liquid in which the density varies continually with position, usually as a consequence of variation of concentration of a solute.

Such gradients may be established by progressive mixing of solutions of different density as for example: sucrose gradients) or by centrifuge induced redistribution of solute (as for caesium chloride gradients).

Density gradients are widely used for centrifugal and gravity induced separations of cells, organelles and macromolecules. The separations may exploit density differences between particles or primarily differences in size, in which latter case the function of the gradient is chiefly to stabilise the liquid column against mixing.


grenz ray (medicine)


grenz ray


Very soft X-ray's, closely allied to the ultraviolet ray's in their wavelength (i.e., long) and in their biologic action upon tissues; they are produced by a specially built vacuum tube with a hot cathode operating from a transformer delivering not more than 8 kw.

Origin: Ger. Grenze, borderline, boundary