Search results for " medio ambiente"
showing 10 items of 967 documents
Evaluación del potencial edáfico en el País Valenciano
1998
14 páginas, 1 figura, 17 tablas.
Capacidad de uso del suelo en Enguera y Anna (la Canal de Navarrés)
2000
10 páginas, 1 figura, 1 cuadro
Alcoy: la crisis textil de 1965 y sus repercusiones
1976
Coping between crises: Early Triassic–early Jurassic bivalve diversity dynamics
2011
The Triassic is bounded by two of the most severe biotic crises, but nevertheless this time was, for bivalves, both a recovery and a diversification period, and a moment to fully exploit some of their evolutionary novelties. Just how and when this was achieved is analyzed in this paper, which covers Induan to Sinemurian bivalve diversity, based on a newly compiled database. Taxonomic diversity and ecospace dynamics are examined separately. Diversity and evolutionary rates were assessed, extinction selectivity was tested using a resampling algorithm, and cohort analysis was used to study extinction patterns. During the Early Triassic most bivalve genera were survivors from the Permian and th…
Bivalves and evolutionary resilience: Old skills and new strategies to recover from the P/T and T/J extinction events
2011
Diversity dynamics among bivalves during the Triassic and Early Jurassic provides the opportunity to analyse the recovery patterns after two mass extinctions: Permian/Triassic and Triassic/Jurassic (T/J). The results presented here are based on a newly compiled worldwide genus-level database and are contrasted to the main morphological characters of the different taxonomical (orders and their constituent families and genera) and ecological groups. Many of such morphological characters are innovations appearing during the time span considered. Diversity and evolutionary rates were assessed and compared between these groups. During the Early Triassic there was a slow recovery, dominated by ep…
AnMBR, reclaimed water and fertigation: Two case studies in Italy and Spain to assess economic and technological feasibility and CO2 emissions within…
2020
[EN] The use of anaerobic membrane bioreactor (AnMBR) technology on urban wastewater can help to alleviate droughts, by reusing the water and nutrients embedded in the effluent in agriculture (fertigation) in line with Circular Economy principles. The combination of AnMBR and fertigation reduces CO2 emissions due to the organic matter valorization and the partial avoidance of mineral fertilizer requirements. However, both AnMBR and fertigation still face technological and regulatory barriers that need to be overcome. These bottlenecks were tackled within the first Innovation Deal approved by the European Commission in 2016, and gave rise to several case studies on water reuse systems. The r…
Steam catalytic cracking of naphtha over ZSM-5 zeolite for production of propene and ethene: Micro and macroscopic implications of the presence of st…
2012
One option to produce more ethene and propene can be to crack naphtha type fractions in dedicated smaller FCC units. We present here the results obtained for high temperature steam catalytic cracking (SCC) of a representative naphtha product (n-heptane) with ZSM-5. It has been found that under those conditions the presence of steam produces an irreversible dealumination of the zeolite as well as a reversible deactivation due to the interaction of water with active sites with a negative effect on protolytic cracking. A kinetic decay model that takes into account the two phenomena has been developed. The apparent activation energy is lower in the presence of steam. It appears that whilst the …
La política territorial de la Generalitat Valenciana: la comarcalització pendent
1995
Aquest article tracta la política territorial seguida per la Generalitat Valenciana des de l"any 1982 fins el 1995 en la qüestió de la divisió comarcal, que hauria d"haver estat una de les claus de la política autonómica dórganització del territori. Per a situar el tema de la comarcalització cal esposar primer les raons que la justifiquen i la síntesi de les principals propostes de divisió comarcal del País Valencia que hom han presentat al llarg del segle. A continuació es fa un recompte de l"actuació dels governs de la Generalitat pel que fa a l"organització territorial, la qual cosa permet constatar-hi un progressiu afebliment de la voluntat de desenvolupqar allò que l"Estatut d"Autonomi…
L'exportació dins la indústria taulellera espanyola
1992
En los últimos años, la industria azulejera, enmarcada dentro del sector de materiales de construcción, ha sido el grupo que se ha mostrado más dinámico dentro de la industria autóctona valenciana, gracias sobre todo al auge de sus exportaciones, que se han duplicado en su volumen entre 1986 y 1992. Este estudio ofrece un análisis de la evolución reciente, situación actual y perspectivas de futuro de las exportaciones españolas de azulejos, las cuales provienen en un 90% desde la comarca de la Plana de Castelló.
Colonización territorial, razón ilustrada y particularidades valencianas en la nueva población de Benadressa (Castelló de la Plana)
2008
El presente artículo analiza la proyección de una nueva población en el interior de la Plana de Castelló (N. del País Valenciano), un proceso de colonización territorial realizado al amparo de la reposición del denominado Fuero o Privilegio Alfonsino (segunda mitad del s.XVIII). El ejemplo de Benadressa permite comprender las complejas relaciones de poder e ideología que se dieron en este tipo de planes, de iniciativa privada pero insertados plenamente en el proyecto económico y territorial de la Ilustración. A su vez, se trata de un capítulo más de las profundas transformaciones sufridas por la Plana de Castelló en la Edad Moderna, principalmente basadas en el avance de la superficie culti…