Search results for "Estructura"
showing 10 items of 368 documents
Estructura social i educació
2018
Recull d'apunts de l'assignatura Estructura social i educació del grau de Magisteri. Material docent supervisat pel Servei de Política Lingüística de la UV. Recull d'apunts de l'assignatura Estructura social i educació del grau de Magisteri. Material docent supervisat pel Servei de Política Lingüística de la UV.
Comentario
1978
A monument to whom? Artist positionality in community art-based projects
2022
Artistic interventions in the public domain are often legitimized as opportunities for the empowerment of local communities. However, the nature of such interventions is complex and cannot be inferred from stated intentions. The interaction between agents of cultural and artistic interventions and local communities is shaped by power relationships that are seldom made explicit, let alone negotiated. Here, we analyze The Gramsci Monument, a site-specific project by Thomas Hirschhorn that took place in the Forest House neighborhood (Bronx, New York) in 2013. The project has been celebrated as an example of an emancipatory practice that involved a disenfranchised local community. We show that …
Comentario
1978
Triblock SEBS/DVB crosslinked and sulfonated membranes: Fuel cell performance and conductivity
2021
[EN] A set of styrene-ethylene-butylene-styrene triblock copolymer (SEBS) membranes with 10 or 25 wt.% divinyl-benzene (DVB) as a crosslinking agent were prepared and validated. Physicochemical characterization revealed suitable hydrolytic and thermal stability of photo-crosslinked membranes containing 25%wt. DVB and post-sulfonated. These compositions were evaluated in H2/O2 single cells, and electrical and proton conductivities were furtherly assessed. The membranes with the milder post-sulfonation showed greater proton conductivity than those with excessive sulfonation. In terms of electrical conductivity, a universal power law was applied, and the values obtained were low enough for bei…
A hybrid nano-MOF/polymer material for trace analysis of fluoroquinolones in complex matrices at microscale by on-line solid-phase extraction capilla…
2021
Abstract A hybrid material (nano-metal organic framework@organic polymer, named as nano-MOF@polymer) was applied for the first time as sorbent for on-line solid-phase extraction capillary electrophoresis with ultraviolet detection (SPE-CE-UV). The resulting material was prepared building layer-by-layer a HKUST-1 (Hong Kong University of Science and Technology-1) nano-MOF onto the polymer surface, which allowed controlling the thickness and maximizing the active surface area. The sorbent was widely characterized at micro- and nano-scale to validate the synthesis and to establish the material properties. Then, fritless microcartridges (2 mm) were assembled by packing only a few micrograms of …
Electronic Structure Modulation in an Exceptionally Stable Non-Heme Nitrosyl Iron(II) Spin-Crossover Complex
2016
The highly stable nitrosyl iron(II) mononuclear complex [Fe(bztpen)(NO)](PF6)(2) (bztpen=N-benzyl-N,N',N'-tris(2-pyridylmethyl)ethylenediamine) displays an S=1/2 S=3/2 spin crossover (SCO) behavior (T-1/2=370 K, Delta H= 12.48 kJmol(-1), Delta S=33 JK(-1) mol(-1)) stemming from strong magnetic coupling between the NO radical (S=1/2) and thermally interconverted (S=0 S=2) ferrous spin states. The crystal structure of this robust complex has been investigated in the temperature range 120-420 K affording a detailed picture of how the electronic distribution of the t(2g)-e(g) orbitals modulates the structure of the {FeNO}(7) bond, providing valuable magneto-structural and spectroscopic correlat…
Spin-crossover nanoparticles anchored on MoS2 layers for heterostructures with tunable strain driven by thermal or light-induced spin switching
2021
In the past few years, the effect of strain on the optical and electronic properties of MoS2 layers has attracted particular attention as it can improve the performance of optoelectronic and spintronic devices. Although several approaches have been explored, strain is typically externally applied on the two-dimensional material. In this work, we describe the preparation of a reversible ‘self-strainable’ system in which the strain is generated at the molecular level by one component of a MoS2-based composite material. Spin-crossover nanoparticles were covalently grafted onto functionalized layers of semiconducting MoS2 to form a hybrid heterostructure. Their ability to switch between two spi…
Crystal structure of 4-[(adamantan-1-yl)amino]naphthalene-1,2-dione
2019
The title compound, an example of a stable 1,2-naphthoquinone, illustrates steric buttressing of the adamantanyl group.
Interpretación paleohidrológica y geoarqueológica del substrato romano y musulmán de la ciudad de Valencia
1990
SE ESTUDIA EL REGISTRO GEOARQUEOLOGICO, ROMANO Y MUSULMAN DE LA CIUDAD DE VALENCIA. SE OBSERVAN CUATRO NIVELES DE SEDIMENTACION DIFERENCIADOS: UN SUELO HIDROMORFO DE EPOCA PRERROMANA, LIMOS Y ARENAS DE DESBORDAMIENTO EN FACIES OVERBANK Y CREVASSE SPLAY DEL PERIODO ROMANO, ARCILLAS Y LIMOS ORGANICOS TARDO ROMANOS Y, FINALMENTE, SECUENCIAS VERTICALES DE SEDIMENTOS DE GRANO MUY GRUESO EN FACIES DE BARRAS Y DEPOSITOS DE CANAL DE EPOCA MUSULMANA. LOS DEPOSITOS DE INUNDACION DE EPOCA HISTORICA CORRESPONDEN A FASES DE PROGRADACION CONTINENTAL EN LA LLANURA COSTERA. (A)