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It is a dopant in some types of glass in lasers and other optoelectronic devices. Europium oxide (Eu 2 O 3) is widely used as a red phosphor in television sets and fluorescent lamps, and as an activator for yttrium-based phosphors. [51] [52] Color TV screens contain between 0.5 and 1 g of europium oxide. [53]
Europium compounds fluoresce under UV light at 395 nm and 365 nm. [1] Europium compounds are compounds formed by the lanthanide metal europium (Eu). In these compounds, europium generally exhibits the +3 oxidation state, such as EuCl 3, Eu(NO 3) 3 and Eu(CH 3 COO) 3. Compounds with europium in the +2 oxidation state are also known.
This article needs to be updated.The reason given is: the section related to E.U. needs further updates (esp. in sections 3.2 and 4.2.2) as the directives 93/42/EEC on medical devices and 90/385/EEC on active implantable medical devices have been fully repealed on 26 May 2021 by Regulation (EU) no. 2017/745 (MDR); furthermore, Brexit triggers updates in these sections (U.K. developed their own ...
The practice of reusing medical devices labeled for only one use began in hospitals in the late 1970s. [8] After a thorough review by the U.S. FDA in 1999 and 2000, [8] the agency released a guidance document for reprocessed SUDs that began regulating the sale of these reprocessed devices on the market, [9] under the condition that third-party reprocessors would be treated as the manufacturer ...
A custom-made device, as defined in the regulations, means a medical device, other than a mass-produced medical device, that (a) is manufactured in accordance with a HCP's written direction giving its design characteristics; (b) differs from medical devices generally available for sale or from a dispenser; and (c) is for the sole use of a ...
Regulation (EU) 2017/745 is a regulation of the European Union on the clinical investigation and placing on the market of medical devices for human use. It repealed Directive 93/42/EEC on Medical Devices (MDD) and Directive 90/385/EEC on active implantable medical devices (AIMDD).
Eu 2+,Dy 3+,B:SrAl 2 O 4 shows significantly longer afterglow than the europium-only doped material. The Eu 2+ dopant shows high afterglow, while Eu 3+ has almost none. Polycrystalline Mn:SrAl 12 O 19 is used as a green phosphor for plasma displays, and when doped with praseodymium or neodymium it can act as a good active laser medium.
Europium(III) oxalate (Eu 2 (C 2 O 4) 3) is a chemical compound of europium and oxalic acid. There are different hydrates including the decahydrate, hexahydrate and tetrahydrate. [ 1 ] Europium(II) oxalate is also known.