This pioneering study was carried out by Antonio González Ramón and directed by doctors Manuel López Chicano and Juan Carlos Rubio Campos. They based their research on the karst aquifer situated in the Pegalajar and the Mojón Blanco ranges. It occupies the northern side of the Betica mountain range and was provisionally declared overexploited in 1992 because of the complete drying up of the La Reja spring - whose source is situated in the centre of the village of Pegalajar - due to the exploitation of the water resources in order to supply the villages of Mancha Real, Pegalajar and La Guardia, which are all situated in the province of Jaén, Spain.
These scientists have proven that important rivers such as Guadalbullón are not insurmountable barriers for groundwater flows, as previously believed. The analysis of piezometric, hydrochemical and isotopic data from groundwater flows revealed that they cross the Guadalbullón River from one bank to the other due to a certain geological structure which prevents the groundwater from being influenced by the river flow.The analysed data
“The hydrogeological model which results from this research has been a useful basis for the development of a programme which controls the exploitation of the Mancha Real – Pegalajar aquifer. This programme aims to solve the social problems related to the exploitation of the groundwater in that area,” according to the author of this study.
After having proven their success, some measures included in this programme have already been put into practice. Also, other measures are being implemented in order to restore the spring of La Reja. The research carried out at the University of Granada has shown the importance of accurate knowledge of geological structures to explain the stages of storage and circulation of groundwater in karst aquifers severely folded and fractured.
Antonio Marín Ruiz | alfa
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Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
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Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.
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At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
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Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.
The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...
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