429 research outputs found

    La seca de encinas y alcornoques en AndalucĂ­a : decaimiento y enfermedad

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    El decaimiento forestal es una enfermedad de etiologĂ­a compleja, resultado de la acciĂłn de un nĂșmero variable de factores biĂłticos y abiĂłticos que causan un deterioro gradual y general de los ĂĄrboles afectados, hasta su muerte. Los factores implicados en el decaimiento de los Quercus en AndalucĂ­a son factores predisponentes de tipo selvĂ­cola, alteraciones climĂĄticas como factor incitante, y plagas y enfermedades como factores contribuyentes. Entre las enfermedades implicadas en Seca de los Quercus destacan, por orden de importancia, la podredumbre radical causada por Phytophthora cinnamomi, los chancros de tronco y ramas causados por Botryosphaeria spp. y el chancro carbonoso causado por Biscogniauxia mediterranea. No obstante, las dos primeras enfermedades tienen una especial incidencia en distintas zonas de AndalucĂ­a de forma independiente, no asociadas al decaimiento. En el presente artĂ­culo se exponen las medidas de control disponibles contra estas enfermedades de los Quercus y se plantea la necesidad de disponer de un diagnĂłstico preciso en cada caso para abordar dicho control con garantĂ­as, ya que no cabe encontrar soluciones Ășnicas que resulten eficaces con independencia de la naturaleza del problema._____________________________________The forestry decline is a complex disease, as a result of the action of a changeable number of biotic and abiotic factors that cause a gradual and general deterioration of the affected trees, until their death. The factors involved in the Quercus decline in Andalusia are predisposing factors like silvic, climatic alterations as inciting factor, and insect pest and diseases as contributing factors. Between the diseases involved in oak decline stand out, in order of importance, the root roting caused by Phytophthora cinnamomi, the chancres of trunk and branches caused by Botryosphaeria spp. and the charcoal canker caused by Biscogniauxia mediterranea. Nevertheless, the first two diseases have a special effect on different zones of Andalusia in different ways, not associated with the decay. In this article we expose the available tools of disease control. We emphasizes the need of having a precise diagnosis in every case to approach the control with guarantees, since there is no chance of finding only one efficient solution regardless of the nature of the problem

    Sub-arcsecond radio and optical observations of the likely counterpart to the gamma-ray source 2FGL J2056.7+4939

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    We have searched and reviewed all multi- wavelength data available for the region towards the gamma-ray source 2FGL J2056.7+4939 in order to con- strain its possible counterpart at lower energies. As a result, only a point-like optical/infrared source with flat-spectrum radio emission is found to be consistent with all X-ray and gamma-ray error circles. Its struc- ture is marginally resolved at radio wavelengths at the sub-arcsecond level. An extragalactic scenario appears to be the most likely interpretation for this object.Comment: 5 pages, 3 figures, 1 tabl

    Langerhans cell histiocytosis in the maxillofacial area in adults : report of three cases

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    Langerhans cell histiocytosis (LCH) is a disease of unknown etiology, characterized by proliferation of pathological Langerhans cells within different organs. It mainly affects children, but adult cases also occur, with an incidence rate of one to two per million. The head and neck are affected in almost 90% of cases. Diagnosis is made by means of histopathological analysis, and imaging studies are necessary in order to determine extent of the disease. There are no controlled trials proposing an optimal treatment protocol for LCH. Prognosis in adults is generally good due to the slow evolution of the disease and its favourable response to treatment. In our report, we present three cases of LCH in patients aged 16, 24, and 28 years respectively, with primary manifestation in the maxillofacial area. A literature review was also conducted

    Bioactive potential of silica coatings and its effect on the adhesion of proteins to titanium implants

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    There is an ever-increasing need to develop dental implants with ideal characteristics to achieve specific and desired biological response in the scope of improve the healing process post-implantation. Following that premise, enhancing and optimizing titanium implants through superficial treatments, like silica sol-gel hybrid coatings, are regarded as a route of future research in this area. These coatings change the physicochemical properties of the implant, ultimately affecting its biological characteristics. Sandblasted acid-etched titanium (SAE-Ti) and a silica hybrid sol-gel coating (35M35G30T) applied onto the Ti substrate were examined. The results of in vitro and in vivo tests and the analysis of the protein layer adsorbed to each surface were compared and discussed. In vitro analysis with MC3T3-E1 osteoblastic cells, showed that the sol-gel coating raised the osteogenic activity potential of the implants (the expression of osteogenic markers, the alkaline phosphatase (ALP) and IL-6 mRNAs, increased). In the in vivo experiments using as model rabbit tibiae, both types of surfaces promoted osseointegration. However, the coated implants demonstrated a clear increase in the inflammatory activity in comparison with SAE-Ti. Mass spectrometry (LC–MS/MS) analysis showed differences in the composition of protein layers formed on the two tested surfaces. Large quantities of apolipoproteins were found attached predominantly to SAE-Ti. The 35M35G30T coating adsorbed a significant quantity of complement proteins, which might be related to the material intrinsic bioactivity, following an associated, natural and controlled immune response. The correlation between the proteomic data and the in vitro and in vivo outcomes is discussed on this experimental work

    Numerical study for the development of flood maps considering the break hypothesis in irrigation reservoirs

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    [EN] The need to regulate the water volume as a function of irrigation needs, as well as the availability of hydric resources, caused the building of a high number of irrigation reservoir. This research describes the process for the development of floods maps when the break hypothesis is considered in irrigation reservoirs. This process was applied on 14 study cases, using FLDWAV and IBER model. The results showed the difference between the failure forms (piping and overtopping). These differences force to consider the two failure hypotheses in the study. Different criteria of damage were defined through velocity and depth values, which enable to interpret more specific the risk areas. The study contributes to improve the interpretation of this type of situations, helping in the planning and management of these possible emergencies.[ES] La necesidad de regular los volĂșmenes de agua en funciĂłn de las necesidades de riego y la disponibilidad de los recursos hĂ­dricos ha provocado la construcciĂłn de un gran nĂșmero de balsas de riego. El presente trabajo describe el proceso para el desarrollo de mapas de inundaciĂłn en caso de rotura, los cuales son obligatorios segĂșn la normativa española. Este proceso ha sido aplicado a 14 casos de estudio reales, empleĂĄndose los modelos de cĂĄlculo FLDWAV e IBER. Los resultados han mostrado que existen diferencias al considerar las distintas formas de rotura: tubificaciĂłn o sobrevertido, obligando a que ambas sean consideradas. A partir de los valores de calado y velocidad se han definido diferentes criterios de daño, que permiten una interpretaciĂłn mĂĄs especĂ­fica de las zonas inundadas. El estudio realizado contribuye a una mejor interpretaciĂłn de este tipo de situaciones, asĂ­ como ayudar en la planificaciĂłn y gestiĂłn de posibles emergencias.Este trabajo se encuentra en el marco del convenio de investigaciĂłn entre la Universidad PolitĂ©cnica de Valencia y la Comunidad General de Usuarios del Alto VinalopĂł denominado “RealizaciĂłn de documentos PE para balsas de riego”.Los autores agradecen D. JosĂ© Luis Adalid Elorza (†) su aportaciĂłn al diseño de elementos de seguridad en balsas de tierra para riego que estĂĄn contribuyendo eficazmente a la seguridad real de las mismas.SĂĄnchez-Romero, F.; PĂ©rez-SĂĄnchez, M.; RedĂłn-SantafĂ©, M.; Torregrosa Soler, J.; Ferrer Gisbert, C.; FerrĂĄn GozĂĄlvez, J.; Ferrer Gisbert, A.... (2019). Estudio numĂ©rico para la elaboraciĂłn de mapas de inundaciĂłn considerando la hipĂłtesis de rotura en balsas para riego. IngenierĂ­a del Agua. 23(1):1-18. https://doi.org/10.4995/ia.2019.8892SWORD118231Abt, S.R., Wittier, R.J., Taylor, A., Love, D.J. 1989. Human Stability in a High Flood Hazard Zone. JAWRA Journal of the American Water Resources Association, 25, 881-890. https://doi.org/10.1111/j.1752-1688.1989.tb05404.xACA, 2003. Recomanacions tĂšcniques per als estudis d'inundabilitat d'Ă mbit local. Agencia catalana del Agua. Guia TĂ©cnica. 106.Adalid, J., Ferrer, C., Torregrosa, J. 2009. GuĂ­as para el proyecto, construcciĂłn, explotaciĂłn, mantenimiento, vigilancia y planes de emergencia de las balsas de riego con vistas a la seguridad. ConsellerĂ­a de Medi Ambient, Aigua, Urbanisme i Habitatge https://www.cma.gva.es/comunes_asp/documentos/agenda/Cas/62949-balsas_indices.pdf, Valencia.Anta, J., BermĂșdez, M., Cea, L., SuĂĄrez, J., Ures, P., Puertas, J. 2015. ModelizaciĂłn de los impactos por DSU en el rĂ­o Miño (Lugo). IngenierĂ­a del agua, 19(2), 105-116. https://doi.org/10.4995/ia.2015.3648Areu-Rangel, O.S., GonzĂĄlez-Cao, J., Crespo, A.J.C., Bonasia, R. 2017. Numerical modelling of hydrological safety assignment in dams with IBER. Sustainable Water Resources Management, 1-12. https://doi.org/10.1007/s40899-017-0135-2BladĂ©, E., Cea, L., Corestein, G. 2014a. ModelizaciĂłn numĂ©rica de inundaciones fluviales. IngenierĂ­a del agua, 18, 71-82. https://doi.org/10.4995/ia.2014.3144BladĂ©, E., Cea, L., Corestein, G., Escolano, E., Puertas, J., VĂĄzquez-CendĂłn, E., Dolz, J., Coll, A. 2014b. Iber: herramienta de simulaciĂłn numĂ©rica del flujo en rĂ­os. Revista Internacional de MĂ©todos NumĂ©ricos para CĂĄlculo y Diseño en IngenierĂ­a, 30, 1-10. https://doi.org/10.1016/j.rimni.2012.07.004BladĂ©, E., Cea, L., Corestein, G., Escolano, E., Puertas, J., VĂĄzquez-CendĂłn, E., Dolz, J., Coll, A. 2014c. Iber: herramienta de simulaciĂłn numĂ©rica del flujo en rĂ­os. 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    A systematic cross-search for radio/infrared counterparts of XMM-Newton sources

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    We present a catalog of cross-correlated radio, infrared and X-ray sources using a very restrictive selection criteria with an IDL-based code developed by us. The significance of the observed coincidences was evaluated through Monte Carlo simulations of synthetic sources following a well-tested protocol. We found 3320 coincident radio/X-ray sources with a high statistical significance characterized by the sum of error-weighted coordinate differences. For 997 of them, 2MASS counterparts were found. The percentage of chance coincidences is less than 1%. X-ray hardness ratios of well-known populations of objects were used to provide a crude representation of their X-ray spectrum and to make a preliminary diagnosis of the possible nature of unidentified X-ray sources. The results support the fact that the X-ray sky is largely dominated by Active Galactic Nuclei at high galactic latitudes (|b| >= 10^\circ). At low galactic latitudes (|b| <= 10^\circ) most of unidentified X-ray sources (~94%) lie at |b| <= 2^\circ. This result suggests that most of the unidentified sources found toward the Milky Way plane are galactic objects. Well-known and unidentified sources were classified in different tables with their corresponding radio/infrared and X-ray properties. These tables are intended as a useful tool for researchers interested in particular identifications.Comment: Accepted for publication in Ap&SS. 47 pages, 10 figures. On-line material: figures and table

    Peripheral organ equivalent dose estimation procedure in proton therapy

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    The aim of this work is to present a reproducible methodology for the evaluation of total equivalent doses in organs during proton therapy facilities. The methodology is based on measuring the dose equivalent in representative locations inside an anthropomorphic phantom where photon and neutron dosimeters were inserted. The Monte Carlo simulation was needed for obtaining neutron energy distribution inside the phantom. The methodology was implemented for a head irradiation case in the passive proton beam of iThemba Labs (South Africa). Thermoluminescent dosimeter (TLD)-600 and TLD-700 pairs were used as dosimeters inside the phantom and GEANT code for simulations. In addition, Bonner sphere spectrometry was performed inside the treatment room to obtain the neutron spectra, some relevant neutron dosimetric quantities per treatment Gy, and a percentual distribution of neutron fluence and ambient dose equivalent in four energy groups, at two locations. The neutron spectrum at one of those locations was also simulated so that a reasonable agreement between simulation and measurement allowed a validation of the simulation. Results showed that the total out-of-field dose equivalent inside the phantom ranged from 1.4 to 0.28 mSv/Gy, mainly due to the neutron contribution and with a small contribution from photons, 10% on average. The order of magnitude of the equivalent dose in organs was similar, displaying a slow reduction in values as the organ is farther from the target volume. These values were in agreement with those found by other authors in other passive beam facilities under similar irradiation and measurement conditions

    Determinants and Differences in Satisfaction with the Inhaler Among Patients with Asthma or COPD

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    Satisfaction with the inhaler is an important determinant of treatment adherence in patients with asthma and chronic obstructive pulmonary disease (COPD). However, few studies have compared these 2 groups to identify the factors associated with satisfaction with the inhaler. To assess and compare satisfaction with the inhaler in patients with asthma or COPD and to determine the variables associated with high inhaler satisfaction. A multicenter, cross-sectional study of 816 patients (406 with asthma and 410 with COPD) was conducted. Satisfaction was assessed with the Feeling of Satisfaction with Inhaler (FSI-10) questionnaire. All participants completed the Test of Adherence to Inhalers and either the Asthma Control Test (ACT) or the COPD Assessment Test (CAT). Overall, the asthma group was significantly more satisfied with the inhaler (mean [standard deviation] FSI-10 scores: 44.1 [6.5] vs 42.0 [7.7]; P <.001) and more satisfied on most (7 of 10; 70%) items. Patients with asthma were significantly more satisfied with the inhaler regardless of the adherence level or the type of nonadherence pattern. Younger age, good disease control (ACT ≄20 or CAT ≀10), previous inhaler training, and absence of unwitting nonadherence were all independently and significantly associated with high inhaler satisfaction. Age, disease control, and training in inhalation technique all play a more significant role than the specific diagnosis in explaining satisfaction with the device in patients with asthma and COPD. These findings underscore the need to provide better training and more active monitoring of the inhalation technique to improve patient satisfaction, treatment adherence, and clinical outcomes

    Model-independent search for CP violation in D0→K−K+π−π+ and D0→π−π+π+π− decays

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    A search for CP violation in the phase-space structures of D0 and View the MathML source decays to the final states K−K+π−π+ and π−π+π+π− is presented. The search is carried out with a data set corresponding to an integrated luminosity of 1.0 fb−1 collected in 2011 by the LHCb experiment in pp collisions at a centre-of-mass energy of 7 TeV. For the K−K+π−π+ final state, the four-body phase space is divided into 32 bins, each bin with approximately 1800 decays. The p-value under the hypothesis of no CP violation is 9.1%, and in no bin is a CP asymmetry greater than 6.5% observed. The phase space of the π−π+π+π− final state is partitioned into 128 bins, each bin with approximately 2500 decays. The p-value under the hypothesis of no CP violation is 41%, and in no bin is a CP asymmetry greater than 5.5% observed. All results are consistent with the hypothesis of no CP violation at the current sensitivity
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