75 research outputs found
Activated carbons as catalytic support for Cu nanoparticles
There are a wide range of catalytic applications for Cu-based nanoparticles materials, since Cu is an
abundant and inexpensive metal and Cu nanoparticles possess unusual electrical, thermal and
optical properties. The possible modification of the chemical and physical properties of these
nanoparticles using different synthetic strategies and conditions and/or via postsynthetic chemical
treatments has been largely responsible for the rapid growth of interest in these nanomaterials and
their applications in catalysis. A previous work have explored the possibilities of SBA-15 (1,2) as
support for Cu nanoparticles. In the present contribution, those results will be compared with the
use of a carbon material as support, since activated carbon present many advantages with respect
SBA, as the high surface area.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
MS-222 toxicity in juvenile seabream correlates with diurnal activity, as measured by a novel video-tracking method
©2010. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
This document is the Accepted version of a Published Work that appeared in final form in Aquaculture. To access the final edited and published work see
https://doi.org/10.1016/j.aquaculture.2010.06.028Fish are frequently exposed to anaesthetics since their use is necessary in several
aquaculture procedures. The aim of this study was to investigate the existence of day night differences in toxicity and effectiveness of a common fish anaesthetic (MS-222)
in juvenile gilthead seabream (Sparus aurata), determining the induction time of
anaesthesia and subsequent recovery by a novel video-recording system. Our results
showed that MS-222 toxicity was significantly higher at ML (mid-light) (LC50=85.5
mg/L) than at MD (mid-darkness) (LC50=107.6 mg/L) (trimmed Spearman-Karber
method). In addition, when fish were exposed to a sublethal but effective MS-222
concentration (65 mg/L), 7 min passed before 50% a reduction in swimming activity
was observed at ML compared to the 9 min required at MD. As regards recovery, fish
showed activity levels similar to basal levels 10 min after MS-222 removal at ML, but
only 6 min at MD. These results indicated that both toxicity and effectiveness were
higher during the day than at night, coinciding with the diurnal activity pattern
displayed by seabream, which should be taken into account when designing and
applying daily protocols for anaesthesia in aquacultur
Balance hídrico de una cuenca regable al sur de españa utilizando técnicas de teledetección
Comunicación presentada al XXXVII Congreso Nacional de Riegos, celebrado en Don Benito del 4 al 6 de Junio de 2019 y organizada por la Asociación Española de Riegos y Drenajes y la Universidad de ExtremaduraSe caracterizaron y evaluaron eventos hidrológicos en la estación de lluvias 2015-2016 y la calidad del riego entre el 21 de abril y 30 de septiembre de 2016 en una cuenca agrícola en la Zona Regable Genil-Cabra, al suroeste de Córdoba, España. El balance hídrico asumió que la percolación profunda fue despreciable ya que bajo el suelo subyacen margas impermeables a poca profundidad, siendo los flujos de salida solo la escorrentía (Es) y la evapotranspiración de los cultivos (〖ET〗_c), esta última derivada de los índices de vegetación. La precipitación (P) y el agua de riego suministrada (R) fueron los flujos de entrada. Los indicadores de calidad del riego evaluados fueron el Coeficiente de Escorrentía (CE), Suministro Relativo de Agua (SRA), Suministro Relativo de Riego (SRR) y la Eficiencia de Aplicación del Riego (EA). La P fue 306 mm y la Es 23 mm, con un CE de 7,5% para 27 eventos hidrológicos. R fue 56 mm, P 22 mm y Es 0,24 mm, para el período de 1 de junio al 30 de septiembre de 2016. La 〖ET〗_c para el conjunto de cultivos fue de 204 mm. El riego aplicado fue inferior al requerido (SRR=0,38), indicando la práctica de riego deficitario, con una alta eficiencia de aplicación del agua de riego (EA = 0,99 y CE = 0,31%), y que las precipitaciones no compensan la demanda de los cultivos (SRA=0,36). Los sistemas de información geográfica, combinados con técnicas de teledetección, son herramientas muy útiles, casi imprescindibles, para los estudios hidrológicos de cuencas agrícolas, mejorando la precisión de los balances de agua. El patrón de escorrentía en respuesta a la lluvia observado en la cuenca de estudio concuerda con observaciones anteriores y permite predecir un CE aproximado para cada situación o episodio de lluvia en función de la humedad precedente. El riego en la cuenca de estudio es altamente eficiente y deficitario
The Bàlitx landslide (Mallorca, Spain) and its possible seismic origin: active spreading since the Late Pleistocene
El deslizamiento de Bàlitx, situado en el escarpado litoral de la Serra de Tramuntana de Mallorca es un gran deslizamiento rocoso traslacional, cuya superficie de rotura aprovecha un plano de falla normal preexistente. La datación de estrías de calcita sobre el plano de falla con U/Th pone de manifiesto que el último movimiento de la falla está fuera del rango de datación de este método (> 400 ka). El volumen de material movilizado por el deslizamiento se estima en unos 700 millones de metros cúbicos, con un desplazamiento de unos 300 m hacia el NO. Se han identificado procesos activos de apertura de grietas de tracción, con desplazamientos y desplomes de grandes bloques de roca procedentes del escarpe principal del deslizamiento, proceso cuyo inicio coincide con un máximo transgresivo hace 83 ka (Pleistoceno superior), correspondiente al estadio isotópico 5a (OIS 5a), constatado como más cálido y húmedo que el actual. En los materiales deslizados se han identificado grietas con longitudes decamétricas y aperturas de hasta 50 m, cuya generación y apertura continua
en la actualidad, y que parecen poner de manifiesto la ruptura del bloque deslizado en varias unidades que se desplazan a distintas velocidades. Se ha realizado un análisis retrospectivo de la estabilidad, considerando
varios escenarios posibles relacionados con posiciones críticas del nivel del mar. Los resultados ponen de manifiesto condiciones de estabilidad en todos los casos, con factores de seguridad >1.3, lo que avala la hipótesis de un posible origen sísmico del deslizamiento. El estudio en condiciones dinámicas pone de manifiesto que el deslizamiento de Bàlitx pudo ser provocado por un posible terremoto de magnitud moderada a alta (Mw≥6.0), localizado en las inmediaciones del deslizamiento (10-30 km), probablemente en relación con alguna de las fallas activas de Mallorca, como la de Palma.The Bàlitx landslide, located on the steep coastal side of the Tramuntana range on the island of Mallorca, is a large translational rock landslide in which the failure surface coincides with the reactivation of an earlier normal fault. The dating of calcite striae on the fault plane with U/Th techniques reveals that the last movement was over 400 kyr ago, which falls outside of the range of this method. The volume of the landslide is estimated to be over 700 million cubic metres, with a north-westward displacement of 300 m. Active extensional cracks as well as block spreads have been identified along the main scarp, together with displacement
and toppling of blocks, the beginning of which coincides with oxygen isotope stage OIS 5a (Late Pleistocene = 83 kyr), a wetter and warmer period than the present. Currently active decametre-long cracks up to 50 mDepto. de Geodinámica, Estratigrafía y PaleontologíaFac. de Ciencias GeológicasTRUEEspaña. Plan Nacional de Investigación Científica y Desarrollo e Innovación Tecnológicapu
Changes in health behaviors, mental and physical health among older adults under severe lockdown restrictions during the covid-19 pandemic in spain
We used data from 3041 participants in four cohorts of community-dwelling individuals aged =65 years in Spain collected through a pre-pandemic face-to-face interview and a telephone interview conducted between weeks 7 to 15 after the beginning of the COVID-19 lockdown. On average, the confinement was not associated with a deterioration in lifestyle risk factors (smoking, alcohol intake, diet, or weight), except for a decreased physical activity and increased sedentary time, which reversed with the end of confinement. However, chronic pain worsened, and moderate declines in mental health, that did not seem to reverse after restrictions were lifted, were observed. Males, older adults with greater social isolation or greater feelings of loneliness, those with poorer housing conditions, as well as those with a higher prevalence of chronic morbidities were at increased risk of developing unhealthier lifestyles or mental health declines with confinement. On the other hand, previously having a greater adherence to the Mediterranean diet and doing more physical activity protected older adults from developing unhealthier lifestyles with confinement. If an-other lockdown were imposed during this or future pandemics, public health programs should spe-cially address the needs of older individuals with male sex, greater social isolation, sub-optimal housing conditions, and chronic morbidities because of their greater vulnerability to the enacted movement restrictions. © 2021 by the authors. Licensee MDPI, Basel, Switzerland
Programa nacional de mejora y conservación de los recursos genéticos de la encina y el alcornoque frente a la seca
Como respuesta a la gravedad de los procesos de decaimiento y mortalidad de la encina y el
alcornoque, que amenazan la sostenibilidad de sus masas en la Península Ibérica, en el año 2019
se constituyó el subgrupo de trabajo “Mejora genética y fisiológica”, que forma parte del grupo de
trabajo “Seca”, coordinado por el MITECO. Este subgrupo incluye a científicos y técnicos de varias
administraciones y numerosos centros de investigación y Universidades y una empresa pública,
expertos en mejora genética, fitopatología, ecología, propagación vegetativa, bioquímica y biología
molecular. El programa tiene como objetivo la selección de genotipos de Quercus ilex y Q. suber
tolerantes al estrés hídrico y a la podredumbre radical provocada por Phytophthora cinnamomi. A
partir del estudio de 18 poblaciones y de 194 árboles “escape” seleccionados en focos de seca, se
espera seleccionar un material apto para restaurar zonas afectadas por problemas de decaimiento.
Se presenta una síntesis de las primeras actividades de caracterización e identificación de árboles
escape en focos de seca, ensayos de invernadero para el estudio de la variabilidad poblacional en
cuanto a vigor y tolerancia al estrés, recogida de muestras vegetales y edáficas para el análisis
genético, molecular y de microbioma, identificación de marcadores moleculares asociados a
resiliencia y micropropagación del material de mayor valor potencial
Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC
Measurements of inclusive jet suppression in heavy ion collisions at the LHC
provide direct sensitivity to the physics of jet quenching. In a sample of
lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated
luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with
a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the
transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the
anti-kt algorithm with values for the distance parameter that determines the
nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of
the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp.
Jet production is found to be suppressed by approximately a factor of two in
the 10% most central collisions relative to peripheral collisions. Rcp varies
smoothly with centrality as characterized by the number of participating
nucleons. The observed suppression is only weakly dependent on jet radius and
transverse momentum. These results provide the first direct measurement of
inclusive jet suppression in heavy ion collisions and complement previous
measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables,
submitted to Physics Letters B. All figures including auxiliary figures are
available at
http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02
Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector
A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results
RICORS2040 : The need for collaborative research in chronic kidney disease
Chronic kidney disease (CKD) is a silent and poorly known killer. The current concept of CKD is relatively young and uptake by the public, physicians and health authorities is not widespread. Physicians still confuse CKD with chronic kidney insufficiency or failure. For the wider public and health authorities, CKD evokes kidney replacement therapy (KRT). In Spain, the prevalence of KRT is 0.13%. Thus health authorities may consider CKD a non-issue: very few persons eventually need KRT and, for those in whom kidneys fail, the problem is 'solved' by dialysis or kidney transplantation. However, KRT is the tip of the iceberg in the burden of CKD. The main burden of CKD is accelerated ageing and premature death. The cut-off points for kidney function and kidney damage indexes that define CKD also mark an increased risk for all-cause premature death. CKD is the most prevalent risk factor for lethal coronavirus disease 2019 (COVID-19) and the factor that most increases the risk of death in COVID-19, after old age. Men and women undergoing KRT still have an annual mortality that is 10- to 100-fold higher than similar-age peers, and life expectancy is shortened by ~40 years for young persons on dialysis and by 15 years for young persons with a functioning kidney graft. CKD is expected to become the fifth greatest global cause of death by 2040 and the second greatest cause of death in Spain before the end of the century, a time when one in four Spaniards will have CKD. However, by 2022, CKD will become the only top-15 global predicted cause of death that is not supported by a dedicated well-funded Centres for Biomedical Research (CIBER) network structure in Spain. Realizing the underestimation of the CKD burden of disease by health authorities, the Decade of the Kidney initiative for 2020-2030 was launched by the American Association of Kidney Patients and the European Kidney Health Alliance. Leading Spanish kidney researchers grouped in the kidney collaborative research network Red de Investigación Renal have now applied for the Redes de Investigación Cooperativa Orientadas a Resultados en Salud (RICORS) call for collaborative research in Spain with the support of the Spanish Society of Nephrology, Federación Nacional de Asociaciones para la Lucha Contra las Enfermedades del Riñón and ONT: RICORS2040 aims to prevent the dire predictions for the global 2040 burden of CKD from becoming true
Measurement of the View the tt production cross-section using eμ events with b-tagged jets in pp collisions at √s = 13 TeV with the ATLAS detector
This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2 fb−1 of proton–proton collisions at a centre-of-mass energy of √s = 13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be:
σtt¯ = 818 ± 8 (stat) ± 27 (syst) ± 19 (lumi) ± 12 (beam) pb,
where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented
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