Search results for " VAN"
showing 10 items of 209 documents
Nano-composite thermochromic thin films and their application in Energy-efficient glazing
2010
A hybrid atmospheric pressure and aerosol-assisted chemical vapour deposition strategy is presented as a facile route for the production of vanadium dioxide nano-composite thin films. The effect of the inclusion of gold nanoparticles and the use of a surfactant molecule, tetraoctylammonium bromide, is discussed. The films were fully characterised using a wide variety of techniques, including scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and UV/vis/NIR spectroscopy. It is shown that micro-structural changes brought about by careful control of film growth conditions, and/or the use of surfactant, lead to an enhancement of thermochromic properties. Gold nano…
A Dialysis Photocatalytic Reactor for the Green Production of Vanillin
2020
In the present work, dialysis was used to recover vanillin while being produced by partial photocatalytic oxidation of ferulic acid in an aqueous solution at ambient temperature. The relatively high value of the permeate flux through a dense polyether-block amide membrane allowed continuously extracting vanillin from the reacting solution, thus avoiding its successive oxidation. The rate of vanillin formation was improved, compared to other reactor configurations, because intermediate compounds permeated from the reacting solution and did not hinder the reaction, while ferulic acid permeated in the opposite direction to partially replenish the reactor with the substrate. The photocatalytic …
VanB-VanC1 Enterococcus gallinarum, Italy
2005
To the Editor: We report detecting a vanB determinant in Enterococcus gallinarum in poultry in Italy. High-level vanA-mediated glycopeptide resistance has been described for E. gallinarum and E. casseliflavus (1–4), and vanB-mediated vancomycin resistance has been frequently described for E. faecalis and E. faecium. However, vanB-mediated resistance in isolates of E. gallinarum has been described only in sporadic nosocomial cases of infection or colonization (5,6). In January 2005, a study of contamination by foodborne organisms in slaughtered broiler carcasses was conducted in Sicily. To detect glycopeptide-resistant enterococci (GRE), each carcass was placed in a bag with 100 mL sterile b…
Two differet ways of being modern
2005
Il confronto tra l''ambasciata di Olanda di OMA e lo stadio di Braga di Souto de Moura dimostra come nella loro diversità gli edifici siano entrambi moderni. Il primo apparentemente “diverso” lavora dentro le regole della città senza conferire all''architettura valore dimostrativo. Il secondo, sebbene lavori in una dimensione più arcaica dell''architettura, completa la città con il suo programma liberandosi dall''automatismo che lega la funzione dell''edificio al tipo e all''immagine dello stesso.
Accurate Treatment of Large Supramolecular Complexes by Double-Hybrid Density Functionals Coupled with Nonlocal van der Waals Corrections.
2015
In this work, we present a thorough assessment of the performance of some representative double-hybrid density functionals (revPBE0-DH-NL and B2PLYP-NL) as well as their parent hybrid and GGA counterparts, in combination with the most modern version of the nonlocal (NL) van der Waals correction to describe very large weakly interacting molecular systems dominated by noncovalent interactions. Prior to the assessment, an accurate and homogeneous set of reference interaction energies was computed for the supramolecular complexes constituting the L7 and S12L data sets by using the novel, precise, and efficient DLPNO-CCSD(T) method at the complete basis set limit (CBS). The correction of the bas…
Hybrid aerosol assisted atmospheric pressure Chemical Vapour Deposition: a facile route toward nano-composite thin films?
2009
A hybrid chemical vapour deposition strategy is presented as a facile route for the production of vanadium dioxide nano-composite thin films. The effect of the inclusion of gold nano-particles and the use of a surfactant molecule; tetraoctylammonium bromide (TOAB), is discussed. The films are fully characterised and it is shown that micro-structural changes lead to an enhancement of thermochromic properties, whilst gold nano-particles lead to a change in the films optical properties. Optical data is used in energy modelling studies to elucidate the films potential as an energy saving coating in architectural glazing.
Locura y muerte de Nadie. Leer a Benjamín Jarnés hoy en día
2010
El presente trabajo lleva a cabo un análisis de la conocida novela de Benjamín Jarnés “Locura y muerte de Nadie” (1929), una de las más logradas manifestaciones de la narrativa de vanguardia española, desde una óptica nueva, es decir una mirada actual desde las complejidades de la época contemporánea. En particular, a través del estudio del tema de la identidad, tópico del género de la novela de vanguardia, se quiere demonstrar que la sociedad de masas representada y criticada por el autor español encuentra su correspondiente en la sociedad tecnológica de hoy en día; el ‘hombre perdido’, tal como lo definiría Ramón Gómez de la Serna, a principios del siglo Veinte así como en la actualidad, …
Social Vision on Wet Nurses in the [Spanish] Newspaper “La Vanguardia” (1881-1908)
2017
Históricamente ha habido situaciones y momentos en que las madres han delegado el proceso de lactancia en nodrizas. En el siglo XIX las nodrizas fueron representadas en la prensa española reproduciendo los esquemas del modelo social androcéntrico imperante. Se pretende describir y categorizar la visión de la nodriza reflejada en la prensa española mediante el análisis de contenido de las fuentes periodísticas de este período. La conclusión alcanzada han sido que la prensa refleja la importancia social de la nodriza como un elemento normalizado en la sociedad con un papel fundamental en los aspectos demográficos de la sociedad, estableciendo una visión dual en función del grupo social al que…
Study of the Ti44(α,p)V47 reaction and implications for core collapse supernovae
2014
The underlying physics triggering core collapse supernovae is not fully understood but observations of material ejected during such events helps to solve this puzzle. In particular, several satellite based γ-ray observations of the isotope 44Ti have been reported recently. Conveniently, the amount of this isotope in stellar ejecta is thought to depend critically on the explosion mechanism. The most influential reaction to the amount of 44Ti in supernovae is Ti44(α,p)V47. Here we report on a direct study of this reaction conducted at the REX-ISOLDE facility, CERN. The experiment was performed with a 44Ti beam at Elab = 2.16MeV/u, corresponding to an energy distribution, for reacting α-partic…
Erratum to “Beta decay half-lives of neutron rich Ti–Co isotopes around N=40” [Nucl. Phys. A 660 (1999) 3–19]
2000
Abstract The neutron-rich 57−59 Ti, 59−62 V, 61−64 Cr, 63−66 Mn, 65−68 Fe, 67−70 Co have been produced at GANIL via interactions of a 60.4 MeV/u 86 Kr 34+ with a 58 Ni target. They have been separated by the doubly achromatic spectrometer LISE3. Beta-decay half-lives have been determined for all produced nuclei, and subsequent γ -rays have been observed for the most efficiently produced nuclei. The measured half-lives of vanadium and chromium isotopes are compared to QRPA calculations using ground states deformations from the FRDM or ETFSI models. In an astrophysical context, the short half-lives of 58 Ti and 64 Cr indicate that these nuclei are potential r-process progenitors, after β -dec…