Y stabilization

The bond between the bridgehead carbons of bicyclo[1.1.0]butanes can be either normal or inverted [35]. The normal bond is stabilized by the high s-character (Scheme 16a). In this case, the hybrids on the bridgeheads Y have low s-character for the bridging Y-X bonds. Electronegative atoms X or substituents R at Y stabilize... 

Whereas the larger rare-earth ions form the perovskites LnFeOs, the smaller ions (Ln = Ho-Lu, Y) stabilize a series of structures Lni+ Fe2+n04+3 containing the Ln " " ion in an octahedral site and the iron in trigonal bipyramidal sites. The end member, LnFe204, contains rare-earth basal planes alternating with a double-layer of edge-shared iron sites, see Fig. The other members of the series incorporate intergrowths of a similar... 

Cubic fluorite-structure (Fm3m) zirconia-based solid solution, (Zr,ACT,REE)02 x, exhibi ts significant compositional flexibility to incorporate high concentrations of Pu, neutron absorbers, and impurities contained in Pu-bearing wastes (Gong et al. 1999). The phase has excellent radiation stability. No amorphization was observed under ion irradiation at room temperature to a dose corresponding to 200 dpa, and at 20 K to a dose of 25 dpa. Irradiation with I+ and Sr+ up to 300 dpa produced defect clusters in Y-stabilized zirconia, but did not cause amorphization. Amorphization... 

Fig. 7. Cartoon illustrating the x and y stability regions in a quadrupole mass filter.

Figure 9 Relationship between tan 6 stability S, and E /y stability 5e for chemically treated wood. See legend to Fig. 2 for abbreviations.

Matsuda Y, Minamida Y. Stability of solid dosage forms. II Coloration and photolytic degradation of sulfisomidine tablets by exaggerated ultraviolet irradiation. Chem Pharm Bull 1976 24(9) 2229-2236. 

T eraoka R, Matsuda Y. Stabilization-oriented preformulation study of photo labile mena-tetrenone (vitamin K2). Int J Pharm 1993 93 85-90. 

Reactions with neutrons are used to produce nuclides on the right-hand side of the line of y stability, i.e. nuclides exhibiting decay. 

Functional group X activates reactant 1 Functional group Y stabilizes reaction transition state... 

Nirasawa, H. Kawachi, T. Ogawa, T. Hori, M. Tomimatsu, N. Nakagawa, K. Ohzu, H. Yamazaki, Y. Stabilized matrix for molten carbonate fuel cell. 31st Intersociety Energy Conversion Engineering Conference, Washington, DC, Aug 11-16, 1996 1132-1137. 

Y stabilized ZrOT SY 5.2 from Z-Tech 10 mol dm" NaNOj room acousto 6.65 204... 

Uchikoshi, T, Hisashige, T, and Sakka, Y, Stabilization of yttria aqueous suspension with polyelhylenimine and electrophoretic deposition, 7. Ceram. Soc.Jpn, 110, 840. 2002. 

Karel, M., Anglea, S., Buera, R, Karmas, R., Levi, G., and Roos, Y. Stability related transitions of amorphous foods, Thermochim. Acta, 246, 249, 1994. 

Seto Y. Stability and spontaneous production of blood cyanide during heating. J Forensic Sci, 1996 41 465-468. 

Kodera,Y., Sekine, T., Yasokochi, T., Kiriu, Yoshihiro, Hiroto, Misao, Matsnshima, A., Inada, Y., Stabilization of L-Aspariginase modified with comb shaped poly(ethylene glycol) derivatives, in Vivo and in Vitro, Bioconjugate Chem., 1994 5 283-286. 

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