Characterization of the five-fold Ca2+ binding site of satellite tobacco necrosis virus using Eu3+ luminescence spectroscopy: A marked size-selectivity among rare earth ions

1992 ◽  
Vol 42 (3) ◽  
pp. 249-256 ◽  
Author(s):  
Sarah E. Burroughs ◽  
George Eisenman ◽  
William DeW. Horrocks
Keyword(s):  
Rare Earth ◽  
Binding Site ◽  
Rare Earth Ions ◽  
Luminescence Spectroscopy ◽  
Tobacco Necrosis Virus ◽  
Size Selectivity ◽  
Necrosis Virus

Fabrication and characterization of TiO2/Sepiolite nanocomposites doped with rare earth ions

2018 ◽  
Vol 228 ◽  
pp. 100-103 ◽  
Author(s):  
Feng Zhou ◽  
Chunjie Yan ◽  
Hongquan Wang ◽  
Sen Zhou ◽  
Sridhar Komarneni
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Fabrication And Characterization

Structural and optical characterization of CdSe nanocrystallites/rare earth ions in sol–gel glasses

2007 ◽  
Vol 29 (11) ◽  
pp. 1495-1500 ◽  
Author(s):  
Gijo Jose ◽  
Cyriac Joseph ◽  
M.A. Ittyachen ◽  
N.V. Unnikrishnan
Keyword(s):  
Rare Earth ◽  
Sol Gel ◽  
Optical Characterization ◽  
Rare Earth Ions ◽  
Gel Glasses

Molecular characterization of a Hungarian isolate of Tobacco necrosis virus A

2010 ◽  
Vol 155 (6) ◽  
pp. 999-1001
Author(s):  
Laszlo Krizbai ◽  
Maria Nemeth ◽  
Vivian Law ◽  
Christopher Reed ◽  
Aniko Varga ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Tobacco Necrosis Virus ◽  
Necrosis Virus

scholarly journals Synthesis and characterization of lanthanum- and yttrium-doped Fe2O3 pigments

Cerâmica ◽  
2007 ◽  
Vol 53 (325) ◽  
pp. 79-82 ◽  
Author(s):  
D. M. A. Melo ◽  
M. A .F. Melo ◽  
A. E. Martinelli ◽  
Z. R. Silva ◽  
J. D. Cunha ◽  
...  
Keyword(s):  
Rare Earth ◽  
Calcination Temperature ◽  
Structural Changes ◽  
Pechini Method ◽  
Color Stability ◽  
Rare Earth Ions ◽  
X Ray Diffraction ◽  
Rare Earth Ion ◽  
Uv Visible

Iron oxide has been doped with rare earth ions (yttrium or lanthanum) aiming at producing ceramic pigments with hues that vary from orange to brown. The powders were synthesized from polymeric precursors using the Pechini method and subsequently calcined between 900 and 1100 ºC. The resulting pigments were characterized by BET, X ray diffraction, colorimetric analysis, UV-visible, infrared (FTIR), particle size distribution and thermal analysis. The color depicted by La/Fe powders changed as the calcination temperature increased from 900 ºC to 1100 ºC, as established by the corresponding changes in the values of the colorimetric coordinates from L* a* b* = 49.003, 10.541, 12.609 to L* a* b* = 31.279, 6.096, 6.877. On the other hand, Y/Fe powders were little affected by similar changes in the calcination temperature, revealing the effect of yttrium on the color stability of the powder. The values of the colorimetric coordinates in this case varied from L* a* b* = 45.230, 17.315, 28.750 to L* a* b* =51.631, 15.726, 25.825. Structural changes were also noticed as a function of the size of the rare earth ion added to the structure. Upon calcination at 900°C, lanthanum stabilized the ABO3-type perovskite structure whereas the presence of yttrium resulted in a mixture of oxides.

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