(n.) Any statue of the goddess Pallas; esp., the famous statue on the preservation of which depended the safety of ancient Troy.
(n.) Hence: That which affords effectual protection or security; a sateguard; as, the trial by jury is the palladium of our civil rights.
(n.) A rare metallic element of the light platinum group, found native, and also alloyed with platinum and gold. It is a silver-white metal resembling platinum, and like it permanent and untarnished in the air, but is more easily fusible. It is unique in its power of occluding hydrogen, which it does to the extent of nearly a thousand volumes, forming the alloy Pd2H. It is used for graduated circles and verniers, for plating certain silver goods, and somewhat in dentistry. It was so named in 1804 by Wollaston from the asteroid Pallas, which was discovered in 1802. Symbol Pd. Atomic weight, 106.2.
Example Sentences:
(1) The coverslips were dehydrated in ethanol, critical point dried with CO2, and coated with gold-palladium.
(2) Acylation with benzoyl chloride and triethylamine in acetonitrile followed by hydrogenolysis with 10% palladium on carbon in trifluoroacetic acid gives O-benzoyl-L-serine, isolated as the hydrochloride salt.
(3) The effect of various fuel additives on the ability of platinum-palladium catalytic converters to remove the carbon monoxide and hydrocarbon components of automotive exhaust has been examined.
(4) The teeth were air dried, mounted on stubs, sputter-coated with gold-palladium and examined under SEM.
(5) Cell spreading was limited since focal contacts were restricted to the palladium.
(6) The device limits the amount of oxygen entering with the sample to a maximum of 2%, which is rapidly removed by reacting with hydrogen in the presence of a palladium catalyst.
(7) For palladium complexes this line coincides with the location of ligands according to their ability to draw off the electron density from the central atom while in case of platinum complexes it has an opposite course of relationship for platinum and palladium complexes, points to a different mechanism of their interaction with the enzyme.
(8) 2-Ethynyl-4,5-diphenylthiazoles were synthesized by the palladium catalyst cross-coupling reaction of 2-iodo-4,5-diphenylthiazole with monosubstituted acetylenes.
(9) 470 patients were additionally tested with a metallic palladium disc.
(10) For example, a post-consumer automotive catalyst has a concentration of platinum group metals (like platinum, palladium and rhodium) more than 100 times higher than in natural ores.
(11) At the end of the synthesis the Alloc group was selectively removed by palladium-catalyzed hydrostannolysis and biotin coupled to the epsilon-amino group of Lys7.
(12) The palladium-silver alloy had inhomogeneous crystallites.
(13) During the welding, a small amount of hydrogen was released from the titanium which, over a period of 2 to 4 weeks, was absorbed by the palladium plates in the capacitor.
(14) Thin sections of specimens that had been prepared for scanning electron microscopy showed that the gold-palladium coating was desposited directly on the indented surface of the lipid core of lipolyzed chylomicrons fixed at pH 7.4.
(15) The acidoligands studied according to their inhibition effect can be arranged in the following line: NO2, Cl, Br, SCN, I, which is true both for platinum and palladium compounds.
(16) Palladium-containing amalgam alloys were developed utilizing the atomization method.
(17) Of the 306 workers, 38 had a positive skin prick test to the platinum halide salts; of these, one gave a positive reaction to the palladium salt and six to the rhodium salt.
(18) Carbon contents up to 200 ppm were measured in the case of a high-palladium system.
(19) Twelve single crowns were cast in a silver-palladium alloy by six different casting techniques.
(20) The inferior medullary velum and tela choroidea were removed intact from the fourth ventricle, post-osmicated, dehydrated, critical point dried, coated with palladium-gold and examined in a Cambridge Stereoscan S4 scanning electron microscope.
Pallas
Definition:
(n.) Pallas Athene, the Grecian goddess of wisdom, called also Athene, and identified, at a later period, with the Roman Minerva.
Example Sentences:
(1) Autogenous Aedes (Ochlerotatus) caspius Pallas from Aswan deposits 1 to 2 egg batches without a blood meal.
(2) The authors report an epizootic form of toxoplasmosis observed among the crowned pigeons (Goura cristata Pallas and Goura victoria Frazer).
(3) Host preferences of mosquitoes, mainly Culex pipiens L. and Aedes caspius (Pallas), were studied in Israel using live baits, chemical attractants, light, and suction traps.
(4) Aedes caspius Pallas populations from the Mediterranean regions are genetically highly polymorphic, and may diverge into 2 genetically isolated forms.
(5) At the infection with the typical strain of the altai subspecies rare transmissions of the agent to Pallas' pika can take place as well as its long preservation in fleas.
(6) Electron microscopically using morphometric analysis, the median eminence and hypophysis posterior lobe have been studied in newborn lemmings (Dicrostonyx torquatus Pallas) at the stage of decreasing population.
(7) The species used were Halocynthia aurantium Pallas and H. roretzi Drashe.2.
(8) Bloodmeals of twenty-nine wild-caught G. palpalis were identified as mostly from man (fifteen) and bushbuck (Tragelaphus scriptus (Pallas] or other wild ruminants (eleven), plus three from reptiles.
(9) A toxic component (AgTx) from the venom of Agkistrodon halys (Pallas) was isolated using DEAE-cellulose DE11 and CM-Sephadex C50 column chromatography and finally purified to homogeneity by FPLC on a MonoQ column.
(10) The fleas of this species are capable to transmit not only the plague agent of the strains typical of this nidus but also non-typical ones which differ in some biological properties and are avirulent for most carriers but Pallas's pika.
(11) Pallas also criticised the state-funded Swedish Film Institute – the biggest financier of Swedish film – for vocally supporting the project, saying a state institution should not "send out signals about what one should or shouldn't include in a movie".
(12) Adult specimens of Astrangia danae (Agassiz) and settled planulae of Porites porites (Pallas) contain crystals averaging 0.7 mu by 0.1 mu by 0.3 mu within Golgi-derived vesicles.
(13) Toxoplasma gondii was found in tissues of a six-year-old female Pallas cat (Felis manul) from the Milwaukee County Zoo.
(14) Parasites collected from free-ranging black bears, Ursus americanus Pallas, 1780, from northeastern Minnesota or northern Michigan include the dog tick, Dermacentor variabilis (Say, 1821), the winter tick, D. ALBIPICTUS (Packard, 1869), a louse, Trichodectes pinguis euarctidoes Hopkins, 1954, an ascarid worm, Baylisascaris transfuga (rudolphi, 1819), a filarial worm, Dirofilaria ursi Yamaguti, 1941, taeniid tapeworms, and unidentified fleas.
(15) In the treatment of the pallas pit viper bite, it was considered that should insisting the excluding poison and detoxifying methods, so as to cut off the absorption of the poison into the body and promote the discharge of the poison from the body, protect and improve the hepatic and renal functions, keep the balance of inter-circumstance.
(16) In Gobius fluviatilis (Pallas), Gobius (Proterorhinus) marmoratus (Pallas), glossa Platichthys flesus (L) the cornea is double and there is an iridescent layer.
(17) During a pilot survey of the parasites of some artiodactylids in the Kalahari Gemsbok National Park a new species of Trichostrongylus Looss, 1905 was recovered from the small intestine of a steenbok, Raphicerus campestris (Thunberg, 1811), a gemsbok, Oryx gazella (Linnaeus, 1758), and a red hartebeest, Alcelaphus buselaphus (Pallas, 1766).
(18) The 85-kDa subunit is the same protein previously shown to associate with polyoma virus middle T antigen and the platelet-derived growth factor receptor (Kaplan, D. R., Whitman, M., Schaffhausen, B., Pallas, D. C., White, M., Cantley, L., and Roberts, T. M. (1987) Cell 50, 1021-1029).
(19) As a result of histological investigations of seasonal dynamics in the anatomical-tissue organization of the litoral sponge Halichondria panicea (Pallas), morphogenetical processes during different periods of its life cycle are described in detail.
(20) Materials from the liver of a wild-living hare (Lepus europeus pallas) which had died from "European Brown Hare Syndrome" (EBHS) and of two hares kept in captivity which had been experimentally infected with the same material and died after two days with the classical signs of EBHS (Eskens and Volmer, 1989) were investigated for the presence of virus particles by electron microscopy using the negative contrast technique.