Buscar
Mostrando ítems 81-90 de 136
INTEGRAL and XMM-Newton observations towards the unidentified MeV source GRO J1411-64
(Edp Sciences, 2006-12)
Aims. We investigate the nature of the COMPTEL unidentified source GRO J1411-64. Methods. The source was observed by INTEGRAL. Its central part was also observed by XMM-Newton. Results. The data analysis shows no hint for ...
Porosity evolution in SnO2 xerogels during sintering under isothermal conditions
(1995-01-01)
The structural evolution during isothermal sintering (200≤T≤600 °C) of SnO2 xerogels was studied by small-angle x-ray scattering (SAXS) using synchrotron radiation. The SAXS intensity and, consequently, the structure ...
X-ray photoelectron diffraction study of relaxation and rumpling of ferroelectric domains in BaTiO3(001)
(Amer Physical SocCollege PkEUA, 2013)
Depth profiling nano-analysis of chemical environments using resonant Raman spectroscopy at grazing incidence conditions
(American Chemical Society, 2013-06)
Both X-ray total reflection and X-ray Raman scattering techniques were combined to discriminate chemical environments in depth-profiling studies using an energy dispersive system. This allowed, for the first time, to resolve ...
Unidentified γ-ray sources off the Galactic plane as low-mass microquasars?
(Springer, 2005-06)
A subset of the unidentified EGRET γ -ray sources with no active galactic nucleus or other conspicuous counterpart appears to be concentrated at medium latitudes. Their long-term variability and their spatial distribution ...
Structural characterization of nanoemulsions stabilized with sodium caseinate and of the hydrogels prepared from them by acid-induced gelation
(Elsevier, 2020-04)
Hydrogels obtained by acidification with glucono-δ-lactone (GDL), starting from nanoemulsions formulated with different concentrations of sodium caseinate (1–4 wt%) or 4 wt% sodium caseinate and sucrose (2–8 wt%), were ...
Raman spectroscopy of nanographites
(Universidade Federal de Minas GeraisUFMG, 2006-09-28)
This work presents the application of the Raman spectroscopy for the study and characterization of nanographite systems. We report the ¯rst detection of nanographite ribbons on a highly oriented pyrolytic graphite substrate ...