| DIFF, diff | difference, differential; diffusion |
|---|---|
| DL | danger list; De Lee [catheter]; deep lobe; developmental level; difference limen; diffusion lung [ca... |
| DLCO | carbon monoxide diffusion in the lung; single-breath diffusing capacity |
| DLCO2 | carbon dioxide diffusion in the lungs |
| DM | membrane component of diffusion |
| diffusion of innovation | The broad dissemination of new ideas, procedures, techniques, materials, and devices and the degree to which these are accepted and used. (12 Dec 1998) |
|---|---|
| diffusion potential | Potential arising from different rates of diffusion of ions at the interface of two dissimilar fluids, a junction potential. (18 Nov 1997) |
| diffusion respiration | Maintenance of oxygenation during apnea by intratracheal insufflation of oxygen at high flow rates. Synonym: apneic oxygenation. (05 Mar 2000) |
| diffusion shell | A small vessel made of a semipermeable membrane through which peptone, but not serum albumin, can pass; used in performing the Abderhalden test. (05 Mar 2000) |
| Einthoven's equation | In the electrocardiogram the potential of any wave or complex in lead II is equal to the sum of the potentials of leads I and III. Synonym: Einthoven's equation. (05 Mar 2000) |
| equation | 1. A making equal; equal division; equality; equilibrium. "Again the golden day resumed its right, And ruled in just equation with the night." (Rowe) 2. <mathematics> An expression of the condition of equality between two algebraic quantities or sets of quantities, the sign = being placed between them; as, a binomial equation; a quadratic equation; an algebraic equation; a transcendental equation; an exponential equation; a logarithmic equation; a differential equation, etc. 3. <astronomy> A quantity to be applied in computing the mean place or other element of a celestial body; that is, any one of the several quantities to be added to, or taken from, its position as calculated on the hypothesis of a mean uniform motion, in order to find its true position as resulting from its actual and unequal motion. 4. Equation box, or Equational box, a system of differential gearing used in spinning machines for regulating the twist of the yarn. It resembles gearing used in equation clocks for showing apparent time. 5. <astronomy> Equation of the center, the difference between the place of a planet as supposed to move uniformly in a circle, and its place as moving in an ellipse. Origin: L. Aequatio an equalizing: cf. F. Equation equation. See Equate. Source: Websters Dictionary (01 Mar 1998) |
| facilitated diffusion | <physiology> A process by which substances are conveyed across cell membranes faster than would be possible by diffusion alone. This is generally achieved by proteins that provide a hydrophilic environment for polar molecules throughout their passage through the plasma membrane, acting as either shuttles or pores. See: symport, antiport, uniport. (18 Nov 1997) |
| fick's law of diffusion | The principle that a substance put into solution will tend to diffuse towards constant concentration throughout the solution. (09 Oct 1997) |
| Fick's laws of diffusion | The direction of movement of solutes by diffusion is always from a higher to a lower concentration and the diffusive flux JA of solute A across a plane at x is proportional to the concentration gradient of A at x; i.e., JA = -D(CA/x), the increase of concentration of solute A with time, CA/t, is directly proportional to the change in the concentration gradient, i.e., CA/t = D(fl2/x2). (05 Mar 2000) |
| Fokker-Planck equation | <radiobiology> An equation that describes the time rate of change of a particle's velocity as a result of small-angle collisional deflections. Applicable when the cumulative effect of many small-angle collisions is greater than the effect of rarer large-angle deflections. (09 Oct 1997) |
| lateral diffusion | Diffusion in two dimensions, usually referring to movement in the plane of the membrane, such as the motion of fluorescently labelled lipids or proteins measured by the technique of fluorescent recovery after photobleaching (FRAP). (18 Nov 1997) |
| least diffusion circle | In the configuration of rays emerging from a spherocylindrical lens system, the place where diverging rays of the lens first forming a line image are balanced by converging rays of the second lens. (05 Mar 2000) |
| Lineweaver-Burk equation | A rearrangement of the Michaelis-Menten equation, 1/v = 1/Vmax + (Km/Vmax)(1/[S]). Compare: double-reciprocal plot. (05 Mar 2000) |