Ground temperatures, landforms and processes in an Atlantic mountain. Cantabrian Mountains (Northern Spain)

This research was supported by the Formación de Profesorado Universitario FPU13/05837 (Ministerio de Educación Cultura y Deporte) program, by the OAPN 053/2010 (Organismo Autónomo Parques Nacionales, MAGRAMA) project, by the I + D + I CGL2015-68144-R (Ministerio de Economia y Competitividad) project, by the Leverhulme Trust International Network Grant IN-2012-140 and the Royal Geographical Society Dudley Stamp Memorial Award.Peer reviewedPostprin

The Sustainable Management of Metals: An Analysis of Global Research

The objective of this study was to analyze research trends in the field of sustainable management of metals on a global level between 1993 and 2017. To do so, a bibliometric analysis was carried out on a total of 6967 articles. The results revealed the growing interest in this research field, particularly over the last five year-period during which 63% of all articles were published. The three journals in which most articles had been published were the Journal of Cleaner Production, ACS Sustainable Chemistry and Engineering, and Chemsuschem. The countries that published the most articles were China, the United States, India, Germany, and the United Kingdom. A sizeable network of collaboration has been established between countries for the joint publication of studies. The main lines of research have been focused on metal decontamination in water and soil, waste management oriented towards reuse and recycling, and the innovation of processes for cleaner and more efficient production. The results revealed the need for comprehensive studies that integrate different disciplines within the same analytical framework, and to promote research that contributes to the different dimensions of sustainability (environmental, economic, and social)

Caracterización de la membrana NF-97 mediante disoluciones salinas. Aplicacióndel modelo de Spiegler-Kedem-Kachalsky

Los procesos fÍsicos basados en las tecnologÍas de membrana se muestran como una clara alternativa en el campo de la desalinización y tratamiento de aguas. Un paso previo en el diseño de estos procesos consiste en la selección y caracterización de las membranas que van a ser utilizadas, siendo estos ensayos de gran utilidad para predecir el comportamiento de las mismas durante su posterior empleo. En este trabajo se ha caracterizado, mediante el uso de dos disoluciones salinas distintas, la membrana de nanofiltración de poliamida (NF-97), al objeto de obtener sus condiciones óptimas de funcionamiento. Los resultados obtenidos se han ajustado al modelo de transporte de flujo a través de la membrana de Spiegler-Kedem-Katchalsky, determinando, mediante resolución gráfica, las constantes del mismo. Se ha comprobado que el modelo es adecuado para describir el proceso de eliminación de las sales mediante nanofiltración, lo que permite predecir el comportamiento de la membrana en otras condiciones de operación

Laser pointer maculopathy. A new public health problem?

pre-print186 K

Recent developments on hadron interaction and dynamically generated resonances

In this talk I report on the recent developments in the subject of dynamically generated resonances. In particular I discuss the gamma p -> K-0 Sigma+ and gamma n -> K-0 Sigma(0) reactions, with a peculiar behavior around the K*(0)Lambda threshold, due to a 1/2(-) resonance around 2035 MeV. Similarly, I discuss a BES experiment, J/psi -> eta K*(0) (K) over bar*(0) decay, which provides evidence for a new h(1) resonance around 1830 MeV that was predicted from the vector-vector interaction. A short discussion is then made about recent advances in the charm and beauty sectors

Catalytic hydroprocessing of lignin β-O-4 ether bond model compound phenethyl phenyl ether over ruthenium catalysts

The catalytic hydroprocessing of phenethyl phenyl ether (PPE), a model compound of one of the most significant ether linkages within lignin structure, β-O-4, has been studied. Reactions were carried out using two ruthenium-based catalysts, supported on different materials: 3.8 wt.% Ru/C and 3.9 wt.% Ru/Al2O3. Aiming at studying the reaction mechanism, experiments were carried out at 150 °C and 25 bar in H2 atmosphere, with varying feed to catalyst mass ratios and reaction time. Differences between the relative importance of the steps of the mechanism were observed when using those two catalysts. The most significant finding was the predominance of the cleavage of Cβ-O bonds compared to the cleavage of the Caryl-O when using Ru/Al2O3 as catalyst; whereas with Ru/C, the two routes were nearly equivalent. It has been observed that the kinetic model describes the general tendencies of consumption and formation of the different products, but some over/under estimation of concentrations occurs. Finally, the effect of temperature was also explored by carrying out reactions at 100 and 125 °C, observing that decreasing temperature from 150 to 125 or 100 °C favored the dimer hydrogenation route versus the hydrogenolysis of the ether bonds

Present situation of the autochthonous donkey population in Spain

A study of the present census and administrative situation has been studied also the possibilities of conservation has been analysed During the last 5 years the donkey census has increased because the consideration like a breed in danger of extinction. There are several initiatives looking for the consolidation of the autochthonous breeds of donkeys in Spain but most of them are less important and very isolated. Except for these conservation initiatives, the donkey breeds be considered in a serious danger of extinction.Se realiza un estudio de la situación actual censal y administrativa de las razas asnales españolas y se analizan sus posibilidades y perspectivas de conservación Queda reflejado cómo en los últimos 5 años se ha producido un aumento en los efectivos asnales como respuesta a las diferentes acciones de sensibilización con respecto a las razas en peligro de extinción. No faltan iniciativas que adaptándose a los nuevos tipos de demanda busquen soluciones para la consolidación de nuestras razas autóctonas asnales aunque aún muchas de ellas son discretas y localizadas. Fuera del ámbito esas actuaciones el panorama no se muestra muy alentador

Failure analysis of prestressed anchor bars

Three broken steel bars from a sewed crack in a dam are reported. The inspection of the fracture surfaces of the prestressed bars suggests that fractures were triggered by small cracks and by the inherent brittleness of the bars, as fracture toughness was about 40 MPa m1/2. The analysis of the failures shows that the usual design requirements for prestressing bars fail to warn against brittle failures if some damage exists. Some recommendations, based on the concept of damage tolerance, are suggested to avoid similar unfortunate incidents