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Search Results: 1 - 10 of 100103 matches for " Ma José Miralles Romero "
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El análisis de los efectos de la escuela sobre el rendimiento académico en matemáticas: Un análisis multinivel con datos de PISA 2003
Ma José Miralles Romero,Juan Luís Castejón Costa,Antonio Miguel Pérez Sánchez,Raquel Gilar Corbí
Revista de Psicología y Educación , 2012,
Abstract: Esta investigación, enmarcada dentro del movimiento sobre Eficacia de la Escuela, realiza una explotación parcial de los datos PISA 2003, para el territorio espa ol, obtenidos en la investigación llevada a cabo por la OCDE. El alumnado espa ol que ha participado en el estudio PISA, supone un total de 10.791 estudiantes de 383 centros de Educación Secundaría pertenecientes a varias Comunidades Autónomas. Las variables predictoras que forman parte de la investigación se obtienen de alumno y del centro. La variable de respuesta, desde un enfoque criterial, establece información sobre el nivel de competencias alcanzado por el alumno en matemáticas. Los resultados del análisis multinivel proporcionan diferentes modelos que tratan de explicar la variabilidad observada entre los centros a través de la incorporación de sus variables. El modelo resultante reconoce que las variables de centro: titularidad, porcentaje de alumnas, fomento de actividades matemáticas y compromiso y moral del alumnado se relacionan con el rendimiento en matemáticas.
Influencia de la fertilización con lodos de depuradura compostados en las propiedades químicas del suelo de dos olivares
Eulalia Ma. Beltrán,Rosario Miralles de Imperial,Miguel ángel Porcel,José Valero Martín
Revista internacional de contaminación ambiental , 2005,
Abstract: Debido al interés creciente en el cultivo del olivo y a la necesidad de reutilizar los lodos residuales procedentes de estaciones depuradoras de la zona centro de Espa a se ha determinado el efecto que tiene el lodo de depuradora compostado (LDC) en las propiedades químicas (materia orgánica, nitrógeno, fósforo, pH y conductividad eléctrica, del suelo de dos olivares de la variedad cornicabra. El ensayo se llevó a cabo en campo durante 4 a os y se evaluaron cuatro tratamientos: a) testigo (T) b) 16,000 kg/ha de lodo de depuradora compostado (LDC) c) 1 kg/árbolde N en forma de urea (U) y d) 8,000 kg/ha de lodo de depuradora compostado más 0.5 kg/árbol de N de urea(LDC +U). Las variables estudiadas fueron concentración en el suelo de materia orgánica, nitrógeno, fósforo disponible, pH y conductividad eléctrica. Todos estos parámetros aumentaron de valor al final de los 4 a os por efecto de las aplicaciones del lodo de depuradora compostado, por lo que puede afirmarse que las propiedades químicas del suelo del olivar experimentan mejoría.
Mineralización del nitrógeno contenido en un lodo de depuradora secado térmicamente
José Valero Martín,Rosario Miralles de Imperial,Eulalia Ma. Beltrán,Miguel Angel Porcel
Revista internacional de contaminación ambiental , 2006,
Abstract: Se presentan resultados de un ensayo de mineralización con lodo de depuradoras de aguas residuales secado térmicamente con el fin de comprobar su comportamiento al aplicarlo al suelo. Se realizó un ensayo de incubación de 52 semanas con tres tipos de suelos (S1, S2, S3) que fueron mezclados con diferentes dosis de lodo secado térmicamente: 0, 15, 30 y 60 t ha-1. Los resultados mostraron que la mayor cantidad de nitrógeno mineralizado aportada por el lodo secado térmicamente se produjo en el suelo S1 (ácido) con 364.60 mg N por kg de suelo seguido del suelo S2 (básico) con 292.19 mg N por kg de suelo y por último la arena, S3 con 221.85 mg N por kg de suelo. Se ajustaron los modelos de regresión para describir la mineralización del lodo secado térmicamente, y para comprobar las variaciones existentes entre los diferentes suelos y las diversas dosis de aplicación. Los modelos se ajustaron tanto a los datos de la suma de N-amonio (N-NH4 +) y N-nitrato (N-NO3 -) como para cada una de estas variables por separado. En el caso del N-NO3 - se encontraron diferencias en el inicio de la nitrificación entre los diferentes suelos. Es importante considerar lo anterior para sincronizar la aplicación con la demanda del cultivo y evitar con ello la contaminación ambiental.
Estudio de la calidad del aceite de oliva virgen de la Denominación de Origen Les Garrigues (Lleida) durante la campa a 1995/96
Motilva, Ma José,Jaria, Ismael,Bellart, Ismael,Romero, Ma Paz
Grasas y Aceites , 1998,
Abstract: The Garrigues territorial quality label (Les Garrigues D.O.) is located in the southern part of Lleida (Catalonian. Spain). The most oil produced in this D.O. corresponds to extra virgin classification and it has a distinctive sensorial quality, as a consecuence of olive cultivar ( Arbequina cv) and the careful elaboration of oil. The new cultural technologies applied to the olive tree cultivar and.the new technologies of olive oil extraction have made necessary the study of oil composition and quality during consecutive harvests, to know if the quality could be afected. The objective of this work is the characterization of virgin olive oils (67 samples from 13 olive mills) during the 1995/96 harvest. Analytical controls show that the mean acidity index is 0.17% in oleic acid, the mean peroxide value is 6.9 meq oxygene active/kg of oil and the mean K270 of 0.21; these quality parameters fulfill the policy values of Les Garrigues D.O. The mean polyphenol content is 152 ppm expressed as cafeic acid, with a great variability among olive mills. As harvesting time progresses, the concentration of pigments in olive oil decreases. The concentration of chlorophyl and that of carotenoid pigments at the begin of the harvest is 15 and 12.6 mg/kg of oil respectively and at the end of the period they are 6 and 4.6 mg/kg of oil respectively. The oil color, expressed as visual ABT index and the chromatic ordinates CIELAB, lies within the yellow zone and does not vary along the harvest season. Departamento de Tecnología de Alimentos, Escuela Técnica Superior de Ingeniería Agraria, Universidad de Lleida. Centro UdL-IRTA. Avda. Alcalde Revira Roure, 177. 25198 Lleida, Espa a. RESUMEN Estudio de la calidad del aceite de oliva virgen de la Denominación de Origen Les Garrigues (Lleida) durante la campa a 1995/96. La Denominación de Origen Les Garrigues se sitúa en el extremo meridional de la provincia de Lleida. La gran mayoría del aceite producido en esta D.O. corresponde a la categoría de virgen extra y posee unas características organolépticas muy peculiares, derivadas del fruto de origen, la variedad Arbequina y de su cuidada elaboración. La aplicación en la zona de modemas técnicas de cultivo del olivo y las nuevas tecnologías de extracción del aceite, hacen necesario un estudio de su composición en campa as sucesivas, con el fin de determinar si la calidad se pudiera ver afectada. El presente trabajo se centra en la caracterización de los aceites producidos en la D.O. Les Garrigues durante la campa a 1995/96. Los aceites obtenidos presentan un grado de acid
El potencial bursátil del mercado portugués
José Luis Miralles Marcelo,José Luis Miralles
Universia Business Review , 2008,
Abstract: La reciente inestabilidad de los principales mercados bursátiles europeos ha conducido a los inversores a considerar otros mercados en los que invertir, como los mercados latinoamericanos o aquellos pertenecientes a los países del Este. Sin embargo, existe otra posibilidad mucho más cercana que es la inversión en el mercado portugués ya que ofrece una transparencia y seguridad mayor que la de los mercados emergentes. Además, forma parte de la mayor plataforma bursátil europea (NYSE Euronext) y sus datos macroeconómicos y bursátiles revelan un gran potencial de crecimiento.
Hyperammonemia induced oxidative stress in cirrhotic rats without promoting differential protein expression in the brain cortex: A 2D-DIGE analysis  [PDF]
Pilar Carbonero-Aguilar, Ma del Mar Diaz-Herrero, José A. del Campo, Olga Cremades, Manuel Romero-Gómez, Juan Bautista
Advances in Bioscience and Biotechnology (ABB) , 2012, DOI: 10.4236/abb.2012.38137
Abstract: Oxidative stress induced by a high ammonia concentration could modify protein expression in the brain. This study was undertaken in order to investigate the impact of hyperammonemia, caused by thioacetmide (TAA) in rats, on brain cortex protein expression using 2D-DIGE, and analyzing its role in the pathogenesis of HE. Hyperammonemia was induced with TAA. Ammonia and active oxidants were measured by L-glutamate dehydrogenase and dichlorodihydrofluorescein diacetate methods, respectively. Lipid peroxidation and protein oxidation biomarkers were also studied. Differential protein expression in the cortex of TAA- and control-rats was studied by 2D-DIGE. Image analysis was performed using the DeCyder? Software. Ammonia concentration in plasma and brain tissue was higher in TAA-rats compared to control-rats, 3.12 and 2.43 fold higher, respectively. Active oxidants production in TAA-rats was increased by 2.7 fold compared to control-rats. Measurements of MDA, HNE and carbonyl groups, biomarkers of lipid peroxidation and protein oxidation respectively, were found to be statistically significantly increased in TAA-rats compared to control-rats (3.16-, 2.44- and 1.95-fold, respectively), reflecting the presence of oxidative stress in the brain of TAA-rats. 2D-DIGE analysis of brain cortex protein allowed the detection of 2896 spots, however, image analysis showed no statistically significant differential protein expression between the proteins expressed in TAA- and control-rats. No statistical significant differential protein expression in the cortex of TAA-rats was observed, although oxidative stress biomarkers for lipid and proteins were higher in the brain of TAA-rats than in control-rats. These results support the idea that oxidative post-translational modifications are implicated in HE physiopathology.
Occupational Therapy in mental health: the occupation as an entity, agent and means of treatment
Moruno Miralles, P,Romero Ayuso, D M
TOG : Revista de Terapia Ocupacional de la APGTO , 2004,
Abstract: I hope you excuse me for starting my exposition telling you a little story. My purpose is not being witty, because maybe most of you do not see anything funny at all in it; at best, quite the reverse: I want to give the best example, which is not always easy, of the reality of our profession. A reality we keep facing despite the passage of time.A few months ago, I was visiting a relative with my wife and my son in a rest home belonging to one of the most famous names of geriatric services today. In the lobby, decorated like a hotel, we were received by the girl at the desk, who was very kind and wore the unavoidable white coat. That was the moment my son took up to shake off my hand and our vigilance. He had found a room which had strongly caught his attention; of course, he ran to it. Once on the inside, he started to manipulate the familiar objects filling that big room. On the table, there was a dominoes of animals (of a famous toys brand) which was by chance like the one he had been given as a present; a puzzle with images from the latest Disney film; plastic cubes and little balls of very vivid colours, blue, red, yellow, green, and a very strange sphere whith a metallic net and containing small spheres with numbers inscribed. The big sphere rotated and ejected the small ones when pressing a button. Excited, he pointed on the wall the sheets to be coloured. Some of them were about butterflies, little ducks, fish, flowers, Bamby, Donald, the duck and the chubby face of an Indian baby with a feather. He also put his attention into a corner full of mats, balls, rings, ropes and coloured rolling-pins.I guess Diego was amazed, maybe surprised by the fact of having been driven by us to such an amusing place without previous notice (as usual). So that, he needed to express his discovery: “Look mummy, it's a school!”.Then, his comment made me laugh ironically, with a bitter face, hardly raising my lip. I remembered the picture of the new costume of the Emperor.Diego, who is not easily cheated by words—in this case, because he could not read the explanatory labels: T.O.R (on the puzzles and the dominoes), gerontogymnastics (near the rings and the balls), and especially a label over the entry door reading: Occupational Therapy. As I said, the child could not read nor perceive more than the bare reality: a kind of school.At that moment I better understood why the relative we were visiting repeatedly refused to go to Occupational Therapy; why he did not listen to my reccomendations, and why he liked better chatting with his friends at the garden, drinking a cof
Nuevas perspectivas del mercado bursátil. El caso espa ol
José Luis Miralles Marcelo,José Luis Miralles Quiros
Universia Business Review , 2006,
Abstract: Los mercados de valores desarrollan su actividad en un entorno cada vez más competitivo. El mercado espa ol, abanderado por la sociedad Bolsas y Mercados Espa oles (BME), está llamado a desempe ar un papel de notable importancia con el objetivo principal de convertirse en una referencia de rentabilidad y liquidez para los inversores y fuente de financiación para las compa ías. En este contexto nuevos productos y medios tecnológicos permitirán el desarrollo de unos mercados transparentes, rápidos y eficaces.
Desagregación conjunta de series anuales: perturbaciones AR(1) multivariante
José Manuel Pavía Miralles
Investigaciones Económicas , 2000,
Abstract:
Presencia, abundancia y estrategias reproductivas de helechos en áreas alteradas de la Sierra Nevada, México
Rodríguez Romero,Ma. Lucía; Zavala Hurtado,José Alejandro; Pacheco,Leticia;
Revista de Biología Tropical , 2011,
Abstract: presence, abundance and reproductive strategies of ferns in disturbed areas of sierra nevada, méxico. diverse reproductive strategies shown by ferns and lycophytes allow them to colonize a variety of habitats, particularly after the incidence of natural or anthropogenic disturbances. this study assessed the presence, abundance and reproductive strategies of ferns growing in soils of temperate forests with different levels of disturbance at the sierra nevada mountain range in the state of mexico. vegetation, soil and environmental variables were recorded in 200m2 permanent plots located in four forest stands. one-way anova and canonical correspondence analysis resulted in the recognition of three landscape types defined by the degree of environmental alteration: low, moderate and severe. also, from five soil samples collected in each stand, germination of ferns and lycophytes was induced. a positive relationship was found between the alteration degree and cheilanthes abundance. under a low landscape alteration regime, species richness is restricted to cheilanthes bonariensis, c. marginata and pellaea ternifolia subsp. ternifolia. the soil is a reservoir of spores of cheilanthes and pellaea ternifolia subsp. ternifolia because their spores can remain viable for different time intervals. apogamy is the usual reproductive strategy of cheilanthes species in disturbed ecosystems, although these species also show sexual reproduction in natural ecosystems with adequate water availability. apogamy may be related to a shorter generation time in comparison with a low disturbed ecosystem. on the other hand, pellaea ternifolia subsp. ternifolia only has sexual reproduction. apogamy might be related to a faster generation in comparison with a low disturbed ecosystem. rev. biol. trop. 59 (1): 417-433. epub 2011 march 01.
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