| dopamine beta-hydroxylase | <enzyme> Chemical name: 3,4-Dihydroxyphenethylamine, ascorbate:oxygen oxidoreductase (beta-hydroxylating) Registry number: EC 1.14.17.1 (12 Dec 1998) |
|---|---|
| dopamine beta-monooxygenase | A copper-containing enzyme catalyzing oxidation of ascorbate and 3,4-dihydroxyphenylethylamine simultaneously by O2 to yield norepinephrine, dehydroascorbate, and water; a crucial step in catecholamine metabolism. Synonym: dopamine beta-hydroxylase. (05 Mar 2000) |
| dopamine hydrochloride | A biogenic amine and neural transmitter substance, used as a vasopressor agent for treatment of shock. (05 Mar 2000) |
| dopamine uptake inhibitors | Drugs that block the transport of dopamine into axon terminals or into storage vesicles within terminals. most of the adrenergic uptake inhibitors also inhibit dopamine uptake. (12 Dec 1998) |
| dopaminergic | Relating to nerve cells or fibres that employ dopamine as their neurotransmitter. Origin: dopamine + G. Ergon, work (05 Mar 2000) |
| dopaminergic system | The system of nerve cells that uses dopamine asits neurotransmitter. (22 May 1997) |
| dope | 1. Any drug, either stimulating or depressing, administered for its temporary effect, or taken habitually or addictively. 2. To administer or take such a drug. Origin: Dutch, doop, sauce (05 Mar 2000) |
| doping | (Dutch doop, sauce) the action of administering a drug to someone before a sports event (originally to a horse before a race), the substance thus administered. (18 Nov 1997) |
| doping in sports | Illegitimate use of drugs for a desired effect in competitive sports; includes humans and animals. (12 Dec 1998) |
| doppler | The use of an augmented listening device for the purpose of detecting the pulse in an extremity. Use in the evaluation of peripheral (occlusive) vascular disease. (27 Sep 1997) |
| doppler broadening | <radiobiology> Frequency spreading which causes broadening of single-frequency radiation (for example, spectral lines) when the radiating bodies (atoms, molecules, etc.) have different velocities. Radiation from each individual radiating body has a different Doppler shift, and the collection of radiations at different frequencies broadens the peak of the line in an intensity-vs-frequency plot. (09 Oct 1997) |
| Doppler colour flow | A computer-generated colour image produced by Doppler ultrasonography in which different directions of flow are represented by different hues. This technique is typically used to examine blood flow when evaluating heart disease. Where obstructions (for instance, arterial plaques) exist, blood flow will alter according to the principles of fluid mechanics. Eddies and reversals are readily apparent on the colour image. See: Doppler ultrasonography. (05 Mar 2000) |
| Doppler echocardiography | Use of Doppler ultrasonography techniques to augment two-dimensional echocardiography by allowing velocities to be registered within the echocardiographic image. See: duplex ultrasonography, Doppler ultrasonography. Synonym: duplex echocardiography. (05 Mar 2000) |
| doppler effect | <radiobiology> Variation in the frequency of a wave (as measured by an observer) due to relative motion between the observer and the source of the wave. (The observed frequency increases if the source is moving towards the observer and vice versa.) The equation can be found in most optics texts and many introductory physics texts. (09 Oct 1997) |
| Doppler phenomenon | <radiobiology> Variation in the frequency of a wave (as measured by an observer) due to relative motion between the observer and the source of the wave. (The observed frequency increases if the source is moving towards the observer and vice versa.) The equation can be found in most optics texts and many introductory physics texts. (09 Oct 1997) |