Search results for "Tale"
showing 10 items of 6428 documents
Il patrimonio scultoreo nel territorio sud-orientale dell'Arcidiocesi di Palermo dal 1690 al 1845.
2012
I sistemi di aree protette in Italia e il loro contributo alla conservazione forestale
2005
Aree Protette, Italia, conservazione forestale
Analisi dei dati di sbarco del gambero viola Aristeus antennatus (Crustacea Aristeidae) in due marinerie della Sicilia nord occidentale.
2008
El miedo, arma política
1998
Arquitectura modernista valenciana: el Círculo Frutero Burrianense
2011
El artículo analiza los aspectos históricos, económicos y artísticos del Círculo Frutero Burrianense, un edificio construido en la ciudad de Burriana (Castellón) en 1916 para servir de apoyo a la explotación y comercialización de cítricos. El estudio profundiza en la autoría; su relación con la vertiente más racionalista de la Arquitectura Modernista, emparentada con la Secesión Vienesa; y se hace un comentario de los elementos constitutivos del interior y del exterior, junto al desciframiento iconográfico de los temas que figuran en la fachada. Se ha hecho un esfuerzo especial por sacar a la luz toda la documentación conservada sobre el inmueble. (A)
Dependence of O2 diffusion dynamics on pressure and temperature in silica nanoparticles
2013
An experimental study of the molecular O2 diffusion process in high purity non-porous silica nanoparticles having 50 m2/g BET specific surface and 20 nm average radius was carried out in the temperature range from 127 to 177 °C at O2 pressure in the range from 0.2 to 66 bar. The study was performed by measuring the volume average interstitial O2 concentration by a Raman and photoluminescence technique using a 1,064 nm excitation laser to detect the singlet to triplet emission at 1,272 nm of the molecular oxygen in silica. A dependence of the diffusion kinetics on the O2 absolute pressure, in addition to temperature dependence, was found. The kinetics can be fit by the solution of Fick’s dif…
O2 Diffusion in Amorphous SiO2 Nanoparticles Probed by Outgassing
2012
An experimental study of the O2 diffusion process in nanoparticles of amorphous SiO2 in the temperature range from 98 to 157 °C was carried out by Raman and photoluminescence techniques. We studied O2 diffusion in high purity silica nanoparticles with a mean diameter of 14, 20, and 40 nm detecting the outgassing of molecules trapped during the manufacturing. The kinetics of diffusion is well described for all the investigated nanoparticles by the Fick’s equation proving its applicability to nanoscale systems. The diffusion coefficient features an Arrhenius law temperature dependence in the explored temperature range, and the diffusion coefficient values are in good agreement with extrapolat…
Irradiation induced Germanium Lone Pair Centers in Ge-doped Sol-gel SiO2: luminescence lifetime and temperature dependence
2010
We studied the temperature dependence of the emission profile and of the lifetime, measured at 4.3 eV, related to the germanium lone pair centers (GLPC) induced by gamma ray at 5 MGy in a Ge-doped silica sample and in an analogous sample irradiated at 10 MGy, in which by a successive thermal treatment up to 415 °C the induced GLPC has been modified (named residual GLPC in the following). The measurements were recorded in the temperature range 10-300 K using an excitation of ∼5.2 eV. The data show that the energy level scheme of the induced and the residual GLPC is very similar to that of the native defects generated during the synthesis, and the intersystem crossing process (ISC) of the ind…
Una piccola capitale dell'Art Nouveau. Palermo
2008
Floral volatiles in a sapromyiophilous plant and their importance in attracting house fly pollinators
2015
Floral scent in sapromyiophilous plants often consists of complex blends with not only fetid (e.g., sulfides) but also sweet (e.g., terpenoids) volatile organic compounds and a recent study suggests that both groups of compounds are involved in pollinator attraction. However, little is known about the number and identity of compounds involved in pollinator attraction in these deceptive plants that mimic breeding sites of fly pollinators. In the present paper, we studied flower volatiles of sapromyiophilous Periploca laevigata and their capability to elicit biological responses in one of the pollinator species, Musca domestica. Floral volatiles were collected by dynamic headspace and analyse…