• Nenhum resultado encontrado

Quím. Nova vol.21 número3

N/A
N/A
Protected

Academic year: 2018

Share "Quím. Nova vol.21 número3"

Copied!
4
0
0

Texto

Loading

Imagem

Figure 1. Fluorescence spectra (77 K) of some Eu  3+  precursors: (a) solution, (b) sol
Figure 5. FLN spectra at 77 K of 1.0 wt% Eu 2 O 3  doped sol-gel silica, densified to 800  o C, prepared from the Eu(fod) 3  precursor

Referências

Documentos relacionados

A escola que pretende ser inclusiva necessita de ser reestruturada, deve planear e promover pedagogias e adequações necessárias de forma a responder efetivamente à

While for several decades the hydroxyl radical - pro- duced via the Fenton reaction - has been considered the species that initiates oxyradical damage, new findings suggest that

Most of the measured properties show the already observed 6,8 change in the glass structure as the PbO content increases: the TeO 4 trigonal bipyramids characteristics of TeO 2

The values of these parameters for typical compositions in both systems show the superior estimated stability of magnesium-doped glasses over those doped with gallium fluoride..

Small weight losses were registered and the absence of water on the glass matrix after the attack suggested that the use of MgF 2 in the systems studied can lead to better

Accordingly, it is proposed two possible intramolecular energy transfer mechanisms between indomethacinate ligand and rare earth ions, which involve the participation of excited

Deste modo, as questões de investigação, que serviram de propulsor para a realização deste estudo, visaram responder aos objetivos da pesquisa, que se dividem em indutivos

Pretendemos saber de que forma a história de vida de cada um influencia o seu quotidiano enquanto imigrante e, a partir daí, perceber as diferentes maneiras