Search results for "BAND"
showing 10 items of 2610 documents
PLANT SUCCESSION ON SICILIAN TERRACES
2007
189 phytosociological relevés have been made in five areas of Sicily, three on volcanic substrates and two on limestones, to study plant community succession trends within abandoned terraced vineyards and cereal fields. Disturbance status and abandonment age was recorded for each sample plot. DCA of these relevés suggests that four are the most important factors driving succession, i.e. geological substrate, bioclimate, age of abandonment and disturbance. In most cases - if there are some dispersal centres near the old fields - undisturbed and less disturbed terraces evolve quite rapidly towards the local potential “climax” community. Different tren…
Gli avantesti delle opere abbandonate. Georges Perec e la disseminazione dei fantasmi del romanzo
2022
The abandoned work is a form of voluntary incompletion because the interruption of the writing process is decided by the author himself. Abandonment is preceded by considerations and traces that make the process intelligible, especially when identified in avant-textual documents in which the author often not only plans the construction of the text but also reasons about it by tracing the criticalities that condition its progress. The article aims to reflect on some aspects of Georges Perec's abandoned works, showing how these are integrated within the completed works through the processes of dissemination and proliferation.
The impact of the farming, abandonment and agricultural intensification on loss of water and soil. The example of the northern slopes of the Serra Gr…
2012
Land abandonment throughout the twentieth century led to an intense landscape transformation in the mountain areas of the Iberian Peninsula. In some cases, and after 50 years of abandonment, agriculture returned with the development of commercial farms and the intensification of the agrarian activities. In the Easter Iberian Peninsula, following the abandonment of olive groves, vineyards and cereals during the 50's, has been in the past two decades the expansion of intensive citrus production on sloping terrain. Geomorphological transects and simulated rainfall experiments have quantified the impact of traditional rainfed cultivation of the 50's, abandonment, and the intensification of farm…
Un paisaje que cambia. Monumentos que fueron en tierras valencianas
2001
En el presente artículo se estudian varios edificios de la Comunidad Valenciana, que se remontan a una época relativamente lejana. A la luz de los estudios recientes y de la investigación arqueológica se puede constatar la escasez de restos, a excepción de algún caso aislado. El contenido comprende fundamentalmente murallas, castillos, palacios señoriales, torres, algún convento o ermita, y el Jardín Botánico del palacio del Arzobispo en Puzol. Las comarcas donde se ubican los monumentos son: "el Camp de Morvedre", "el Camp del Turia", "l'Horta Nord", "la Plana de Utiel-Requena", "la Ribera Alta", "la Safor", "la Vall d'Albaida" y "la Costera". (A)
Do Vulnerable Youth Dream Of Precarious Employment? Decision Making at (In/Ex) clusion Pathways
2015
Este trabajo aborda el análisis de los discursos de jóvenes que han tenido dificultades en su itinerario educativo y que han participado en “itinerarios de segunda oportunidad”. A partir de entrevistas a jóvenes, pretendemos aproximarnos a los argumentos desde los que dan sentido a sus itinerarios académicos y a las decisiones a las que se han enfrentado. Estos argumentos muestran fuertes implicaciones de la posición social de los actores, y están influidos por agentes de la institución educativa y familiar. En ese marco los jóvenes van configurando unas expectativas de futuro. Estas expectativas se debaten entre tres vías: salidas a espacios laborales poco cualificados y precarios, aunque …
El derribo decimonónico de la Casa de la Ciudad de Valencia
2011
En el año 1860 se consumó el derribo total de la antigua Casa de la Ciudad de Valencia. ¿Edificio ruinoso o deliberadamente arruinado? A un cierto deterioro inicial no atendido correctamente se sumó el oprobio, la desidia, la inoperancia y la nefasta gestión de un gobierno municipal que cambiaba de presidencia con demasiada asiduidad en virtud de los vaivenes políticos y sociales. A ello se sumaron intereses económicos derivados de las nuevas alineaciones viales circundantes. El presente estudio desvela los pormenores de la pérdida de uno de los tantos edificios sucumbidos en la Valencia del siglo XIX. (A)
Profesorado : revista de curriculum y formación del profesorado
2015
Este trabajo aborda el análisis de los discursos de jóvenes que han tenido dificultades en su itinerario educativo y que han participado en 'itinerarios de segunda oportunidad'. A partir de entrevistas a jóvenes, pretendemos aproximarnos a los argumentos desde los que dan sentido a sus itinerarios académicos y a las decisiones a las que se han enfrentado. Estos argumentos muestran fuertes implicaciones de la posición social de los actores, y están influidos por agentes de la institución educativa y familiar. En ese marco los jóvenes van configurando unas expectativas de futuro. Estas expectativas se debaten entre tres vías: salidas a espacios laborales poco cualificados y precarios, aunque …
Impact of hydroxy and octyloxy substituents of phenothiazine based dyes on the photovoltaic performance
2013
Two novel organic dyes containing hydroxy and octyloxy substituents onto a phenothiazine skeleton were synthesized and their effects on the photovoltaic performance were studied. Hydroxy acts as an ancillary anchoring unit along with the carboxylic group, while the phenothiazine modified moiety acts as an electron donor. The photophysical and electrochemical studies revealed that maximum absorbance of the dye with the hydroxy group in the solution was blue shifted and its band gap increased, indicating that donor acceptor strength was reduced as compared to the octyloxy substituted dye. Furthermore, electron lifetime of the organic dye with the hydroxy moiety was shorter due to smaller resi…
FTIR spectroscopy studies of high pressure-induced changes in pork macromolecular structure
2019
Abstract High pressure processing (HPP) allows to extend the shelf life of meat and meat products by pressurization of microorganisms. At the same time, HPP can induce changes of the protein structure. Vacuum-packed pork chops were HPP-treated at 300, 600 MPa for 1 or 15 min. Samples of raw, cooked and HPP-treated meat muscles and juice were analysed to evaluate the structure of macromolecules. HPP caused visible discolouration of pork chops; hence, the colour of pork meat surface was tested. The lightness (colour component L*) was directly proportional to the applied pressure, probably due to the increased protein denaturation by high pressure. Pork meat muscle and juice samples were analy…
Electronic structure of phthalocyanines : Theoretical investigation of the optical properties of phthalocyanine monomers, dimers, and crystals
1990
We present valence effective Hamiltonian (VEH) calculations on the optical absorptions of a series of phthalocyanine compounds: the metal‐free phthalocyanine molecule, a model system for the lithium phthalocyanine molecule, the metal‐free phthalocyanine dimer, and model systems for the lutetium diphthalocyanine and the lithium phthalocyanine crystal. For these compounds, it is found that the major factor influencing the evolution of the optical transitions is not the electronic structure of the metal but rather the geometric structure: phthalocyanine intraring geometry and, in the dimers and crystals, interring separation and staggering angle. The origin of the so‐called Soret or B absorpti…