| dribble | 1. To drool, slaver, drivel. 2. To fall in drops, as the urine from a distended bladder. (05 Mar 2000) |
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| Drickamer motif | Either of the two highly conserved patterns of invariant amino acids found in the carbohdrate recognition domain of C type and S type lectins. (18 Nov 1997) |
| dried alum | Alum deprived of its water of crystallization by heat; an astringent dusting powder. Synonym: burnt alum. (05 Mar 2000) |
| dried human albumin | A sterile preparation of serum albumin obtained by fractionating blood plasma proteins from healthy persons; used as a transfusion material and to treat oedema due to hypoproteinaemia. Synonym: dried human albumin. (05 Mar 2000) |
| dried human plasma protein fraction | Freeze-dried human plasma protein fraction. (05 Mar 2000) |
| dried human serum | Serum prepared by drying liquid human serum by freeze-drying or by any other method that will avoid denaturation of the proteins and will yield a product readily soluble in a quantity of water equal to the volume of liquid human serum from which it was prepared. (05 Mar 2000) |
| dried yeast | The dry cells of a suitable strain of Saccharomyces cerevisiae; brewers' dried yeast, debittered brewers' dried yeast, or primary dried yeast are the sources of dried yeast; it contains not less than 45% of protein, and in 1 g not less than 0.3 mg of nicotinic acid, 0.04 mg riboflavin, and 0.12 mg thiamin hydrochloride; used as a dietary supplement. (05 Mar 2000) |
| drift | Collectively, stream invertebrates (almost wholly the aquatic larval stages of insects) that voluntarily or accidentally leave the substrate to move or float with the current, as well as terrestrial invertebrates that drop into the stream. Also, any detrital material transported in the water current. (09 Oct 1997) |
| drift cyclotron loss cone instabilities | (DCLC) This is an electrostatic microinstability (frequencies at harmonics of the ion cyclotron frequency) which is of major concern in small mirror devices. Mode is driven by radial gradients in the electron density, and causes loss of ions due to non-conservation of magnetic moment (see adiabatic invariant) as they interact with the mode, and are dispersed in velocity space into the loss cone. Stabilisation is accomplished by increasing the plasma size and by partially filling the loss cone with a continuous extermal warm plasma stream. (09 Oct 1997) |
| drift feeder | Fish and other predators that forage on invertebrates drifting on the water surface or in the water column. (09 Oct 1997) |
| drift line | An accumulation of water-carried debris along a contour or at the base of vegetation that provides direct evidence of prior inundation and often indicates the directional flow of flood waters. (09 Oct 1997) |
| drift motion | <radiobiology> Ordinarily particles placed in a magnetic field will simply orbit in circles, but if the magnetic field is not uniform, or curves, or there is an electrical field perpendicular to the magnetic field, or another force is applied perpendicular to the magnetic field, then the guiding centres of the particle orbits will drift (generally perpendicular to the magnetic field and to the applied force). (09 Oct 1997) |
| drift movements | Slow ocular movements of greater amplitude than flicks, occurring during ocular fixation. Synonym: drift movements. (05 Mar 2000) |
| drift pumping | <radiobiology> A process that removes ions trapped in a thermal barrier using radial transport induced by an externally-applied radiofrequency field tuned to resonate with the azimuthal drift frequency. (09 Oct 1997) |
| drift surface | <radiobiology> Surface on which the guiding centre of a particle is constrained to move, due to the effects of the laws of adiabatic invariance on its drift motion. (09 Oct 1997) |