Yttrium silicate

Fig. 1. Competition binding screens Bead/ligand compatibility test in early assay development. The beads PVT-WGA, Type A and Type B are based on polyvinyltoluene (PVT) not polyethyleneimine (PEI). PVT, polyvinyltoluene WGA, wheat germ agglutinin Ysi, yttrium silicate.

Typically, filtration is used to separate bound from free using 96-well plates in a total volume of 200 iL, but SPA technology using yttrium silicate wheatgerm agglutinin-coated beads in 384-well plates and a total volume of 60 pL has also been used [43]. 

In most cases the coating alone may be changed on subsequent treatments (e.g., by calcination at elevated temperatures), such as by converting basic carbonates into oxides. However, in some instances the shell and the core may interact to yield a different compound. For example, silica particles coated with Y(0H)C03 on heating to IOOO°C reacted to yield yttrium silicate, Y2Si207, which was restricted to the shell, as long as the amount of silica in the core was in molar excess (32). 

Natural teeth exhibit blue-white fluorescence in the long-wavelength UV [5.435]-[5.437]. Luminescent pigments are used to imitate this phenomena in artificial teeth. They are added to the ceramic paste at a concentration of 0.3-0.5 wt%. Yttrium silicates doped with cerium, terbium, and manganese give the best results [5.438]. The excitation maximum of these phosphors is in the range 325-370 nm. The fluorescence color of the teeth can be varied by changing the concentration of activators. 

Liddell, K., Thompson, D.P. (1986), X-ray diffraction data for yttrium silicates . Brit. Ceram. Trans. J., 85, 17-22. 

Yttria thin films can also be deposited on Si substrates from Y(hfac)3 and Y(thd)3 by oxygen plasma-assisted CVD. It is found that with Y(hfac)3 the appropriate thin films were contaminated with fluorine, leading to unexceptional electrical properties. As discussed in Section V.A.4, next to yttrium oxide, SiOi and yttrium silicate are formed on the substrate surface. Pre-nitridation of the silicon surface impedes the reaction with the substrate. 

Bosze, E.J., Hirata, G.A., and McKittrick, J., Investigation of the chromaticity of blue emitting yttrium silicate. Mater. Res. Soc. Symp. Proc., 560, 15, 1999. 

The stability of yttrium silicate apatite has been investigated by studying the influence of iron as a stabilising cation using X-ray diffraction and Si MAS NMR. " ... 

SPA beads are prepared from inorganic materials such as yttrium silicate (YSi)... 

Yttrium Silicate Y2S105 Ce Eu Blue-green Lamps for high color rendition... 

Cerium is also used as an activator in yttrium-silicate phosphors (e.g. Muresan et al. 2010). 

Muresan L, Stefan M, Bica E, Morar M, Indrea E, Popovici EJ (2010) Spectral investigations of cerium activated yttrium silicate blue emitting phosphor. J Optoelectr Adv Mat—Symp 2... 

Another class of ceramic glasses are termed Y-Mg-Al Si O (YMAS), prepared from magnesium aluminum silicate, yttrium silicate, magnesium aluminum oxide and corundum (AI2O3). 

Ytttrium aluminate and yttrium silicate, doped with cerium, are used as luminescent materials for cathode ray tubes in radar systems. Together they cover a broad wavelength region. 

Yttrium silicate cerium phosphors of superior properties were synthesized by Marsh et al. (2002). A precipitate was obtained by adding excess ammonia to a sol obtained from a mixture of tetraethyl orthosilicate (TEOS) in ethanol and yttrium nitrate in concentrated HNO3 solution. The precipitate was stirred in 2-propanol with cerium nitrate as the precursor for the dopant (see above for syntheses with dopant salt addition), dried and fired at 1600°C/2 h. Apparently the particles were not monodisperse (as in the ammonia-mediated synthesis in the so-called StOber method see Gel Microspheres Precipitated through pH Control ). 

Young s modulus of bulk glass gel, 139 yttria-doped zirconia gel, 150 yttrium aluminum garnet. See YAG yttrium silicate, 151... 

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