yttrium


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yttrium

 [ĭ´tre-um]
a chemical element, atomic number 39, atomic weight 88.905, symbol Y. (See Appendix 6.) The radioisotope 90Y emits high energy beta particles, localizes predominantly in bone, and has been used in radiotherapy.

yt·tri·um (Y),

(it'rē-ŭm),
A metallic element, atomic no. 39, atomic wt. 88.90585.
[Ytterby, village in Sweden]

yttrium

 An ultrarare metalic element–atomic number, 39; atomic weight, 88.9–named after Ytterby in southern Sweden, which may be used in nuclear medicine scans

yt·tri·um

(Y) (it'rē-ŭm)
A metallic element, atomic no. 39, atomic wt. 88.90585.

yt·tri·um

(Y) (it'rē-ŭm)
A metallic element used in lasers.
References in periodicals archive ?
Carr, "Hepatic arterial90 Yttrium glass microspheres (therasphere) for unresectable hepatocellular carcinoma: interim safety and survival data on 65 patients," Liver Transplantation, vol.
Rare earth elements and yttrium in seawater: ICP-MS determinations in the East Caroline, Coral Sea, and South Fiji basins of the western South Pacific Ocean.
In a typical procedure, 0.5 M zinc nitrate and yttrium nitrate with different concentration (0.025-0.1) in molar ratio were dissolved in 50 mL of distilled water-ethanol (equal volume) and stirred for 10 min at 80[degrees] C in a round bottom flask, as a sulfur source 0.5 M [Na.sub.2]S x 9[H.sub.2]O was dissolved in 50 mL of distilled water-ethanol (equal volume) which was added dropwise to the above solution and stirred for 15 min.
Rouxel et al., "Rare Earth Element and yttrium compositions of Archean and Paleoproterozoic Fe formations revisited: new perspectives on the significance and mechanisms of deposition," Geochimica et Cosmochimica Acta, vol.
Yttrium is a heavy REE with a number of significant uses including; Yttrium Iron Garnets (YIG) are used as resonators for use in frequency meters, magnetic field measurement devices, tuneable transistors and oscillators.
Lipscombe, who specializes in neuronal ion channels and is a corresponding author on the paper, pointed out that yttrium's ionic radius is nearly identical to calcium's, which is why it "gets stuck and prevents calcium from entering and passing through.
Alloying elements were used in the form of degreased and dried chips of zirconium and yttrium. Weights of mentioned metals at the ratio 7:3 in amount (100 [+ or -] 3) g per 10 kg of copper were placed into special channels, drilled in copper ingot being evaporated, and on surface of the latter.
Er:YAG lasers produce energy by exciting the Erbium (Er) atoms in a crystal of Yttrium, Aluminum and Garnet, abbreviated as YAG.
It operates with glass, steel, zircon, cerium, and yttrium grinding media and is suitable for recirculation and single-pass operation.
Iron and steel operations have resorted to tough materials such as zirconia oxide, or aluminum oxide filters compounded with zirconia oxide, calcium oxide, yttrium oxide, mullite, spinels and other ceramics for improved thermal shock capabilities.
The standard procedure for secondary cataracts is a form of laser surgery known as YAG Capsulotomy (YAG is an abbreviation for Yttrium Aluminum Garnet, the laser used for this procedure and Capsulotomy means cutting into the capsule).
Figure 8 shows neutron diffraction scans of the magnetic peaks in a film where 15 atomic planes of magnetic dysprosium are separated by 14 atomic planes of non-magnetic yttrium, and then this basic bilayer is repeated (43,45-46).