| alfa grass | A plant (Macrochloa tenacissima) of North Africa; also, its fibre, used in paper making. Source: Websters Dictionary (01 Mar 1998) |
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| alfacalcidol | 1-alpha-Hydroxycholecalciferol;a derivative of vitamin D used in the treatment of hypoparathyroidism, vitamin D dependent rickets, and rickets associated with malabsorption syndromes. (05 Mar 2000) |
| alfalfa | <botany> The lucern (Medicago sativa); so called in California, Texas, etc. Origin: Sp. Source: Websters Dictionary (01 Mar 1998) |
| alfalfa mosaic virus | The type-species of the genus alfamovirus that is non-persistently transmitted by aphids. (12 Dec 1998) |
| alfamovirus | A genus of the family bromoviridae with a wide host range. Transmission is by aphids and the type species is alfalfa mosaic virus. (12 Dec 1998) |
| alfenide | <chemistry> An alloy of nickel and silver electroplated with silver. Source: Websters Dictionary (01 Mar 1998) |
| alfentanil | <chemical> N-(1-(2-(4-ethyl-4,5-dihydro-5-oxo-1h-tetrazol-1-yl)ethyl)-4-(methoxymethyl)-4-piperidinyl)-n-phenylpropanamide. A short-acting opioid anaesthetic and analgesic derivative of fentanyl. It produces an early peak analgesic effect and fast recovery of consciousness. Alfentanil is effective as an anaesthetic during surgery, for supplementation of analgesia during surgical procedures, and as an analgesic for critically ill patients. Pharmacological action: analgesics, opioid, anaesthetics, intravenous, narcotics. Chemical name: Propanamide, N-(1-(2-(4-ethyl-4,5-dihydro-5-oxo-1H-tetrazol-1-yl)ethyl)-4-(methoxymethyl)-4-piperidinyl)-N-phenyl- (12 Dec 1998) |
| alfentanil hydrochloride | C21H32N6O3 -HCl -H2O;a very potent, short acting narcotic agonist analgesic used as an anaesthetic or as an adjunct in the maintenance of general anaesthesia. (05 Mar 2000) |
| alfilaria | <botany> The pin grass (Erodium cicutarium), a weed in California. Source: Websters Dictionary (01 Mar 1998) |
| alfione | <zoology> An edible marine fish of California (Rhacochilus toxotes). Source: Websters Dictionary (01 Mar 1998) |
| alfisols | <ecology> Soils having significantly more clay in the B-horizon than in the A-horizon and high base status. (09 Oct 1997) |
| Alfred Wallace | <person> A British naturalist who founded the field of biogeography and independently formulated a theory of natural selection around the same time that Darwin was doing his work. Lived: 1823-1913. (09 Oct 1997) |
| Alfven ion cyclotron instability | <radiobiology> An electromagnetic microinstability near the ion cyclotron frequency, driven by the ion loss cone in a mirror device. Acronym: AIC (13 Nov 1997) |
| Alfven velocity | <physics, radiobiology> Phase velocity of the Alfven wave, equal to the speed of light divided by the square root of (1 plus the ratio of the plasma frequency to the cyclotron frequency for a given species). Va = c / SQRT(1 + plasma frequency / cyclotron frequency) (13 Nov 1997) |
| Alfven waves | <physics, radiobiology> Transverse electromagnetic waves that are propagated along lines of magnetic force in a plasma. The waves have frequency significantly less than the ion cyclotron frequency, and are characterised by the fact that the field lines oscillate (wiggle) with the plasma. The propagation velocity depends on the particle density and the strength of the magnetic field. [Relatively] Low frequency ion oscillation in the presence of an equilibrium magnetic field. Also called the transverse hydromagnetic wave along B_0. The torsional Alfven wave in cylindrical geometry was first measured in liquid mercury by B. Lehnert. Alfven waves were first generated and detected in plasma by Allen, Baker, Pyle, and Wilcox in Berkeley and by Jephcott in England in 1959. (13 Nov 1997) |
| Westergren, Alf | <person> Swedish physician, *1891. See: Westergren method. (05 Mar 2000) |
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