Bibliotecas universitarias españolas en la web social

Overview of the implementation of social web technologies in Spanish university libraries. The research made it possible to determine, among other issues, the reasons why these libraries use (or not) the social web, which 2.0 services are used more and less and for what purposes, obstacles faced by the libraries in carrying out a process of this type, etc. Furthermore, the study attempted to quantify the degree of adoption of these technologies with the help of new measures designed as part of the research process

Análisis turístico de Almadén (Ciudad Real): propuestas de mejora en un entorno Patrimonio de la Humanidad

[Resumen] Venimos asistiendo en las últimas décadas a un incremento continuado de la importancia del turismo cultural tanto en nuestro país como en el resto de Europa, planteándose como un modelo alternativo al tradicional “turismo de sol y playa”. Este turismo “de interior” toma distintas posiciones dependiendo del destino a visitar, motivación del turista o tipo de oferta turística seleccionada, surgiendo así diferentes posibilidades de oferta turística, proporcionada a través de destinos de turismo cultural urbano, turismo de naturaleza o de turismo rural, a grandes rasgos. Estas formas de turismo no resultan independientes entre sí, y pueden mostrarse en combinación formando amplios espacios territoriales turísticos, pudiendo contener productos y elementos más innovadores como son el caso de las acciones de desarrollo del turismo cultural relacionado con la industria y la minería. En estos territorios se ha conseguido recuperar el patrimonio industrial y minero, acompañado de la implantación de oferta turística como elemento capaz de contribuir a desarrollar la zona. El caso de Almadén es paradigmático en España, debido a su reciente declaración como Patrimonio de la Humanidad, de ahí que sea necesario evaluar cuál es la situación en la que se encuentra actualmente el lugar, qué es lo que se ha venido haciendo hasta ahora, y en base a esto, qué debe realizarse en adelante desde la planificación y la gestión turística para continuar en el desarrollo y consolidación del destino, sin perder de vista los elementos de autenticidad e integridad recogidos por la UNESCO[Abstract] Tourism Analysis of Almaden (Ciudad Real). Improvement proposals in a UNESCO World Heritage Site environment In recent decades it has been attending a steady increase in the importance of cultural tourism in our country and in the rest of Europe, considering as an alternative model to the traditional "sun and beach tourism". This "indoor" tourism takes different positions depending on the destination to visit, tourist motivation or selected type of tourism, thus resulting different possibilities of tourism, provided through urban destinations of cultural tourism, nature tourism or rural tourism, roughly. These forms of tourism are not independent, and can be displayed in combination forming large touristic areas, and may contain innovative products such as the case of cultural tourism related to industry and mining elements. In these territories it has managed to recapture the industrial and mining heritage, accompanied by introducing tourism as an element capable of helping the development of the area. The case of Almadén is paradigmatic in Spain, due to its recent declaration as a World Heritage Site, hence it is necessary to assess what is the current situation on the place, what has been done so far, and based on this, to be carried forward from planning and tourism management in order to continue the development and consolidation of destination, without losing sight of the elements of authenticity and integrity imposed by UNESCO

Dilution versus pollution in watercourses affected by acid mine drainage: a graphic model for the Iberian Pyrite Belt (SW Spain)

The aim of this study was to chemically characterize the water quality impacts of the 88 acid mine drainage (AMD) generating mines in the Spanish sector of the Iberian Pyrite Belt (IPB). This was necessary because the Water Framework Directive of the European Union and the hydrological plans of the Tinto, Odiel, and Piedras river basins require that water quality be improved enough to allow at least some of the rivers in the IPB to sustain healthy fish populations by 2027. The results indicate a clear decrease in metals, arsenic, and sulfate concentrations and increased pH between the AMD-sources and the river channels.info:eu-repo/semantics/publishedVersio

Erythropoietin as a protective factor in rat CNS cells receiving radiotherapy: An in vitro study

Objetivo. Investigar el efecto de la eritropoyetina en cultivos celulares de corteza cerebral de ratas cuando se administra radioterapia. Materiales y métodos. El estudio se desarrolla con la obtención de corteza cerebral de embriones de 17 días de preñez de ratas Wistar. Las células cultivadas después de 72 horas de la extracción de la corteza se dividieron en dos grupos, a uno de ellos se le administró eritropoyetina alfa a una concentración de 30 pM y el otro era el grupo control. A los dos grupos de células se les radió con 6 Gy mediante un aparato Phoenix. Tras la radioterapia permanecieron 24 horas en la incubadora antes de fijarlas. Las células fueron fijadas con formaldehído al 4%. A continuación, con la técnica de TUNEL, se valoró el número de células apoptóticas en los cultivos radiados. Resultados. Se observó un porcentaje de apoptosis del 25,22% del grupo de cultivo sin eritropoyetina, mientras que en el grupo de células radiadas con eritropoyetina fue del 15,5%. Las variables cuantitativas se analizaron mediante el test t de Student y el resultado de la comparación entre los dos grupos fue estadísticamente significativo (p < 0,0001). Conclusión. En nuestro modelo experimental in vitro se comprobó que la eritropoyetina es eficaz en la prevención de la apoptosis en células del sistema nervioso central de ratas por radiación. Esto abre nuevos campos para la investigación del efecto protector del sistema nerviosoAim. To investigate the effect of erythropoietin in cultured rat cerebral cortex cells receiving radiotherapy. Materials and methods. Cerebral cortex was taken from 17-day-old Wistar rat embryos and placed in culture. At 72 hours, the cultures were divided into two groups, one receiving 30 pM erythropoietin alpha and the other was the control group. Both groups received 6 Gy from a Phoenix apparatus and were incubated for another 24 hours before fixation in 4% formaldehyde. TUNEL technique was employed to calculate the number of apoptotic cells in the irradiated cultures. 206 www.neurologia.com Rev Neurol 2014; 58 (5): 199-206 A. Gómez-De la Riva, et al Results. Apoptosis affected 25.22% of the cells cultured without erythropoietin and 15.5% in the group receiving erithropoyetin. Student’s t-test was used to analyse quantitative variables and showed a significant difference in apoptosis between the two groups (p < 0.0001). Conclusion. Our in vitro experimental model demonstrated that erythropoietin effectively prevents apoptosis in irradiated rat SNC cells, opening new fields for investigation into protective agents for the nervous syste

Magnesium and aluminum sulfates in salt efflorescences from acid mine drainage in the Iberian Pyrite Belt (SW Spain)

Proceedings IMWA 2016, Freiberg/Germany | Drebenstedt, Carsten, Paul, Michael (eds.) | Mining Meets Water – Conflicts and Solutions.The current study is focused on AMD-precipitates that compose the typical magnesium and aluminum sulfate assemblages in the Spanish sector of the Iberian Pyrite Belt (SW Spain). The main objectives are identify and describe the composition, morphology and paragenetic relationships of these sulfate phases. From the methodological pint of view, sampling procedure covered the entire metallogenetic province, including five selected representative mines and eight river basins, which are the main receptors of the acid mine drainage discharges. The mineralogical analyses were performed by X-Ray diffraction and electron microscopy. The obtained results showed the extraordinary abundance of aluminum sulfates with acicular habit, from the series pickeringite-apjhonite-halotrichite. They form typical assemblages with other aluminum sulfates, such as alunogen and tamarugite, and with the Mg sulfates: epsomite and hexahydrite. Moreover, the paragenetic relationships indicate the late occurrence of acicular Alsulfates from the halotrichite group.Financial support for this research was provided by the Andalusian Autonomous Government Excellence Project, code P06-RNM-02167. This work was also co-funded by the European Union through the European Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), project ICT (UID/GEO/04683/2013) with reference POCI-01-0145-FEDER-007690 and national funds provided by Fundação para a Ciência e Tecnologia.info:eu-repo/semantics/publishedVersio

Salt efflorescences in the iberian pyrite belt: occurrence and distribution

The evolution of sulfide wastes promotes acid mine drainage and phenomena of supergenic neoformation. These contribute to a secondary paragenesis, often dominated by salt efflorescences. These can be used as mineralogical indicators of reactivity conditions and of AMD potential. The present study shows the salt efflorescences that develop in the Spanish sector of the Iberian Pyrite Belt, as a result of the strong acid mine drainage observed in this region. The obtained results showed dominance of metallic sulfates. Depending on the proximity to the sulfide sources, there are different types of assemblages. Iron and cooper minerals dominate inside the mining areas, whereas magnesium sulfates occur more abundantly in the receiving river networkFinancial support was provided by the Andalusian Autonomous Government Excellence Project, code P06-RNM-02167. This work was also co-funded by the European Union through the European Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), project ICT (UID/GEO/04683/2013) with reference POCI-01-0145-FEDER- 007690 and national funds provided by Fundação para a Ciência e Tecnologia.info:eu-repo/semantics/publishedVersio

Fuzzy intelligence approach for modeling the migration of contaminants ina reservoir affected by AMD pollution

The Sancho Reservoir, located in the Huelva province (SW Spain), is supplied by the Meca River, which receives water contaminated by mining activities in Tharsis. This study focused on determining the relationship that temperature, pH, and electrical conductivity (EC) had with rainfall. The temperature, pH, and EC were simultaneously measured every 30 min by two probes suspended in the Sancho Reservoir. It was anticipated that the use of fuzzy logic and data mining would lead to a model that would show how the contaminant load evolved over space and time. Similar results were obtained for the two locations, except that the parameters had more outliers near the dam due to the greater distance from the contamination source. As expected, higher pH corresponded with lower EC, since, in the absence of chloride, sulphate was the principal anion. The dependency relationship of the variables as well as the cause–effect relationship with the rate of rainfall was more evident in the up-gradient sampling location than near the dam due to the different residence time and the transit time between the two points

Ligand exchange in gold-coated FePt nanoparticles

In this work, we present the magnetic properties of gold-coated FePt nanoparticles and the study of stable aqueous dispersions of FePt@Au and FePt synthesized after ligand exchange with mercaptoundecanoic acid. The particle size determined from transmission electron microscopy (TEM) micrographs goes from 4 nm for the uncoated nanoparticles to a maximum of 10 nm for the gold-coated ones indicating that the thickness of the shell ranges from 1 to 3 nm. The magnetic characterization consists in hysteresis cycles at 10 and 300 K. The results show that, at low field and room temperature, the magnetic behavior of uncoated and coated nanoparticles are surprisingly quite similar. Because the gold-coated nanoparticles keep the magnetic properties of FePt and the presence of gold improves the functionalization of nanoparticles, the system is suitable for biological application. Mercaptoundecanoic ligand transfer was used to render water stable nanoparticles in a wide pH range. Transmission electron microscopy and dynamic light scattering (DLS) results show the nanoparticles slightly agglomerate after ligand exchange. Fourier transform infrared spectroscopy results suggest that thiol binds to the gold atoms of the surface

Análisis comparativo de diferentes métodos para la determinación de dureza en maderas

Dentro de las numerosas propiedades físico-mecánicas de la madera, la dureza ha sido una de las que ha sido objeto de un menor número de estudios. Los valores de dureza que se pueden consultar en diferentes bibliografías presentan grandes diferencias entre sí. Esto se debe por un una parte a la heterogeneidad de la madera como material, pero por otro lado a la diferencia existente entre los distintos tipos de ensayos y su baja fiabilidad a la hora de comparar valores correspondientes a distintos rangos de magnitudes. En este estudio se trata de ampliar los conocimientos sobre las similitudes y diferencias que puedan existir entre distintos tipos de ensayos. Nos centraremos en analizar la relación entre ensayos de dureza a penetración constante y ensayos de dureza a fuerza constante. También se analizará la influencia de la densidad sobre el valor de dureza, y su variación entre los diferentes grupos taxonómicos [...]Producción Vegetal y Recursos ForestalesMáster en Ingeniería de Monte