Search results for " radical"
showing 10 items of 757 documents
Desclasamientoy desencanto. La representación de las clases medias como eje de una relectura generacional de la transición española
2014
Resumen: A partir de un ejemplo de cultura underground de mediados de los años setenta, este texto reflexiona sobre los límites de las narrativas convencionales y críticas sobre la instauración de la democracia en España debido a su sesgo politológico y plantea la existencia de un metarrelato sociológico subyacente común. Su fundamento es una representación de la clase media como estrato social que suaviza el conflicto social y garantiza la modernización económica y política. El artículo desvela una parte del proceso de cristalización, a partir de legados anteriores, de un discurso mesocrático en la cultura española durante la dictadura franquista, al que contribuyeron al unísono intelectua…
Unusual packing of ET molecules caused by π–π stacking interactions with TRISPHAT molecules in two [ET][TRISPHAT] salts (ET=bis(ethylenedithio)tetrat…
2007
Abstract The synthesis, structure and physical properties of two new radical salts formed with the organic donor bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) and a racemic mixture of the chiral anion (tris(tetrachlorobenzenediolato)phosphate(V)) (TRISPHAT) are reported. The structure of the salts (ET)4[TRISPHAT]4 · 3.5H2O (1) and (ET)(TRISPHAT) · CH2Cl2 · CH3CN (2) has been solved by X-ray single crystal diffraction. Unusual packings of ET molecules are obtained in the two structures. The electrical properties indicate that both compounds are insulators. This is in agreement with the isolation of the ET molecules and their complete ionization. On the other hand, the anisotropy of …
Synthesis and copper-mediated nuclease activity of a tetracationic tris(2,2′-bipyridine) ligand
2009
Abstract We report herein the synthesis of a novel tetracationic tris(2,2′-bipyridine) ligand 4 . We show that this ligand metalated with copper(II), and in the presence of ascorbate as a reducing agent, strongly damages pUC18 plasmid DNA. Copper complex formation was demonstrated by ESI-MS (electrospray ionization-mass spectrum) at a 1:3 ligand to metal ratio. Binding of both 4 and its copper(II) complex to CT-DNA (calf thymus DNA) was characterized by viscosimetry, thermal denaturation and fluorescence-based competition assays. The viscosimetric data indicated that 4 and its copper(II) complex bind DNA through partial intercalation and thermal denaturation studies revealed a significant i…
Contribution of the gas-phase reaction between hydroxyl radical and sulfur dioxide to the sulfate aerosol over West Pacific
2021
Sulfate is among the major components of atmospheric aerosols or fine particulate matters. Aerosols loaded with sulfate result in low air quality, damage to ecosystems, and influences on climate change. Sulfate aerosols could originate from that directly emitted to the atmosphere and that produced by atmospheric physicochemical processes. The latter is generated from sulfur dioxide (SO2) via oxidation either in the gas phase reactions or in the aqueous phase. Several mechanisms of SO2 oxidation have been proposed, but the differentiation of the various mechanisms and identification of the sources remain challenging. To meet this need, a new method to estimate the contribution of the gas-pha…
2010
Abstract. As a major source region of the hydroxyl radical OH, the Tropics largely control the oxidation capacity of the atmosphere on a global scale. However, emissions of hydrocarbons from the tropical rainforest that react rapidly with OH can potentially deplete the amount of OH and thereby reduce the oxidation capacity. The airborne GABRIEL field campaign in equatorial South America (Suriname) in October 2005 investigated the influence of the tropical rainforest on the HOx budget (HOx = OH + HO2). The first observations of OH and HO2 over a tropical rainforest are compared to steady state concentrations calculated with the atmospheric chemistry box model MECCA. The important precursors …
Tunable radical scavenging activity of carbonaceous structures and their anti-oxidant behaviour in polymer based nanocomposites
2017
Introduction: Carbon nanotubes (CNTs), due to their electronic properties, show radical scavenging activity toward the radical formed during the degradation processes of polymeric materials. In this work, we propose a novel strategy to control the CNTs anti-oxidant features through the application of an ultrasound treatment (us). Materials and Methods: Ultra high molecular weight polyethylene (UHMWPE); multi-walled carbon nanotubes (CNTs); CNTs have been sonicated at room temperature for different time intervals. Nanocomposites have been prepared though hot compaction and fully characterized. Results: The content of CNTs structural defects, evaluated through Raman-spectroscopy, increases wi…
Caeruleus: significado cromático en la poesía latina del s. I a.C.
2020
En este artículo se estudia el color azul a través de su significante caeruleus y su familia léxica en los poetas latinos del s. I a.C. y, especialmente, en la Eneida, poema en el que adquiere una especial relevancia. Se analiza su etimología, significado y valores; su relación con ?????? del que constituye una traducción. Se concluye que los poetas latinos usan este radical especialmente para el mar y las aguas (ríos, fuentes, tormentas), el cielo o el mundo vegetal, un uso ausente en Homero e infrecuente en la poesía griega.
La Germanía de Gandía y la radicalización de la revuelta agermanada
2018
Reformismo, radicalización y conflicto interno en el socialismo español : la Federación Socialista Valenciana durante la Segunda República y la Guerr…
2012
El objeto de esta tesis es analizar el socialismo político en Valencia -Federación Socialista Valenciana- durante los años treinta del s. XX (Segunda República y Guerra Civil). Este período fue uno de los más convulsos de la historia del socialismo español. En él, hubo dinámicas reformistas y radicales, y duros conflictos internos entre los partidarios de cada uno de estos posicionamientos, materializados desde 1935 en una división interna en dos facciones bien diferenciadas: caballeristas y prietistas. Las principales consecuencias de esta división aparecerían durante la Guerra Civil española, cuando los conflictos llegaron a su cénit. De este modo, esta tesis estudia en profundidad dichas…
Coexistence of ferro- and antiferromagnetic interactions in a metal-organic radical-based (6,3)-helical network with large channels.
2005
A metal–organic open-framework with an unprecedented (6,3)-helical topology, large channels and mixed ferro- and antiferromagnetic interactions has been synthesized using a three-connecting tricarboxylic polychlorotriphenylmethyl radical and Co(II) ions. Lloret Pastor, Francisco, Francisco.Lloret@uv.es