241 research outputs found

    Baseline to Evaluate Off-Site Suspended Sediment-Related Mining Effects in the Alto Tajo Natural Park, Spain

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    Mining is a human activity with considerable environmental impact. To evaluate such impacts, international laws require undertaking local studies based on direct sampling to establish baseline conditions of parameters modified by human activities. Mining takes place near the Alto Tajo Natural Park, where a suspended sediment concentration (SSC) baseline is required to determine whether mining affects water quality. To this end, we have monitored the Tajo River and its tributary the Tajuelo following Before–After Control-Impact (BACI) techniques, recommended by Australian and New Zealand laws, requiring a specific method based on continuous monitoring and sampling to enable evaluation of SSCs. An SSC baseline has been defined at stations situated upstream of the mining area and compared with those downstream. The highest detected SSC upstream of the Tajuelo mines was 24 g l−1 whereas the highest simultaneous downstream value was 391 g l−1, more than one order of magnitude higher than the supposed baseline (24 g l−1). Additionally, this value is 1000 times more than the average concentration of 25 mg l−1, used by the European Union until 2015, to guarantee the quality of salmonid waters. Following a BACI approach, a statistically significant SSC impact has been identified. The mined areas are the only source that can explain this increase. This is the first instance that such an increase and baseline have been found using this method. BACI is a simple and reliable method recommended for studying degraded areas rather than an irrelevant, fixed standard as included in most international laws. Copyright © 2016 John Wiley & Sons, Ltd.This study was funded by: (i) Research Project CGL2010-21754-C02-01 (Spanish Ministry of Science and Technology, and Ministry of Economy); (ii) the Department of Agriculture and Environment of Castile—La Mancha through its socalled “Fondos Verdes” (Green Funding); (iii) the research contract 249/2015 between CAOBAR and UCM; (iv) the Ecological Restoration Network REMEDINAL-3 of the Madrid Community (S2013/MAE-2719); (v) the Spanish National Research Council (CSIC) for Ph.D. Grant JAEPredoc to IZAPeer reviewe

    Switching Roles: Beneficial Effects of Adipose Tissue-Derived Mesenchymal Stem Cells on Microglia and Their Implication in Neurodegenerative Diseases

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    This research was funded by the Andalusian Government, Spain (grant no. P20-01255 to M.D. and FEDER program grant no. A1-CTS-324-UGR18 to M.R.S.) and by the Spanish Ministry for Economy and Competition, Spain (grant no. SAF2017-85602-R and PID2020-119638RB-I00, both to E.G.-R.). A.I.S.-C. was the awardee of a Research Starting Fellowship for master´s students at the University of Granada, Spain. The APC was funded by MDPI.Neurological disorders, including neurodegenerative diseases, are often characterized by neuroinflammation, which is largely driven by microglia, the resident immune cells of the central nervous system (CNS). Under these conditions, microglia are able to secrete neurotoxic substances, provoking neuronal cell death. However, microglia in the healthy brain carry out CNS-supporting functions. This is due to the ability of microglia to acquire different phenotypes that can play a neuroprotective role under physiological conditions or a pro-inflammatory, damaging one during disease. Therefore, therapeutic strategies focus on the downregulation of these neuroinflammatory processes and try to re-activate the neuroprotective features of microglia. Mesenchymal stem cells (MSC) of different origins have been shown to exert such effects, due to their immunomodulatory properties. In recent years, MSC derived from adipose tissue have been made the center of attention because of their easy availability and extraction methods. These cells induce a neuroprotective phenotype in microglia and downregulate neuroinflammation, resulting in an improvement of clinical symptoms in a variety of animal models for neurological pathologies, e.g., Alzheimer’s disease, traumatic brain injury and ischemic stroke. In this review, we will discuss the application of adipose tissue-derived MSC and their conditioned medium, including extracellular vesicles, in neurological disorders, their beneficial effect on microglia and the signaling pathways involved.Andalusian Government, Spain P20-01255FEDER program grant no. A1-CTS-324-UGR18Spanish Ministry for Economy and Competition, Spain (grant no. SAF2017-85602-R and PID2020-119638RB-I00)Research Starting Fellowship for master´s students at the University of Granada, SpainMDP

    Plasma engineering of microstructured piezo – Triboelectric hybrid nanogenerators for wide bandwidth vibration energy harvesting

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    We introduce herein the advanced application of low-pressure plasma procedures for the development of piezo and triboelectric mode I hybrid nanogenerators. Thus, plasma assisted deposition and functionalization methods are presented as key enabling technologies for the nanoscale design of ZnO polycrystalline shells, the formation of conducting metallic cores in core@shell nanowires, and for the solventless surface modification of polymeric coatings and matrixes. We show how the perfluorinated chains grafting of polydimethylsiloxane (PDMS) provides a reliable approach to increase the hydrophobicity and surface charges at the same time that keeping the PDMS mechanical properties. In this way, we produce efficient Ag/ZnO convoluted piezoelectric nanogenerators supported on flexible substrates and embedded in PDMS compatible with a contact–separation triboelectric architecture. Factors like crystalline texture, ZnO thickness, nanowires aspect ratio, and surface chemical modification of the PDMS are explored to optimize the power output of the nanogenerators aimed for harvesting from low-frequency vibrations. Just by manual triggering, the hybrid device can charge a capacitor to switch on an array of color LEDs. Outstandingly, this simple three-layer architecture allows for harvesting vibration energy in a wide bandwidth, thus, we show the performance characteristics for frequencies between 1 Hz and 50 Hz and demonstrate the successful activation of the system up to ca. 800 Hz.EMERGIA Junta de Andalucía programUniversity of Seville the VI PPIT-USICMS and the CITIUS from the University of Sevill

    Combatiendo el prejuicio en personas mayores desde la formación.

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    The present study analyzes the effectiveness of a procedure of automatic reduction of prejudice, based on the assumption of the perspective of the members of stereotyped groups. Specifically, the evaluation of this cognitive strategy in the elderly population is addressed, and potentially modulating variables between the intervention and its effects on prejudice are considered: personality, values, empathy and attribution. Data were collected from a sample of 58 participants with a mean age of 63 years, in which an intervention based on mental imagery aimed at reducing prejudice was implemented. The results show a moderate effectiveness of the strategy and find interaction with several modulating variables, notably particularly kindness, along with attributional activity and values of benevolence, universalism, self direction and conformity, which modulated the effectiveness of perspective taking. The discussion, in addition to contrasting parallels and divergences with the results of other experiments, suggests some applications in the training of elder people, demonstrating that cognitive self-regulation is considered as a relevant competence in the advanced stages of life, decisive for achieving a satisfactory and inclusive active ageing.El presente estudio analiza la efectividad de un procedimiento de reducción automática del prejuicio, basado en la asunción de la perspectiva de los miembros de grupos estereotipados.Específicamente, se aborda la evaluación de esta estrategia cognitiva en población mayor, y se contemplan variables potencialmente moduladoras entre la intervención y sus efectos sobre el prejuicio: personalidad, valores, empatía y atribución. Se recogieron datos en una muestra de 58 participantes con edad media de 63 años, en la que se implementó una intervención basada en imaginería mental dirigida a la reducción del prejuicio. Los resultados muestran una moderada efectividad de la estrategia y hallan interacción con diversas variables moduladoras. Particularmente fue la amabilidad, junto con la actividad atribucional y los valores de benevolencia, universalismo, autodirección y conformidad, los que intervinieron modulando la eficacia de la toma de perspectiva. La discusión, además de contrastar paralelismos y divergencias con los resultados de otros experimentos, sugiere algunas aplicaciones en la formación de personas mayores, demostrando que la autorregulación cognitiva se plantea como una competencia relevante en los estadios avanzados de la vida, decisiva para lograr un envejecimiento activo, satisfactorio e inclusivo

    Internacionalización de las asignaturas de mediación de la Facultad de Trabajo Social de la UCM

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    Este proyecto pretende mejorar "internacionalización del currículum" así como el desarrollo de las competencias trasversales de los alumnos de la Facultad de Trabajo Social y de la UCM en general, mediante la oferta de una asignatura de 3 ECTS complementaria de mediación que será impartida en la Facultad de Trabajo social y ofrecida a todos los estudiantes de la UCM. La creación de este seminario sobre mediación ofrecerá al alumnado las técnicas y herramientas necesarias para la negociación y la gestión colaborativa de conflictos, mejorando sus competencias transversales, pero además se hará desde la perspectiva internacional e interdisciplinar que requiere la mediación, puesto que se trata de una materia con un profundo carácter interdisciplinario y con una gran proyección internacional.La estructura de este seminario se organiza en torno a la intervención de diferentes profesores a lo largo de todo del segundo semestre académico. Se aprovechará la experiencia previa de los miembros del grupo en el ámbito de las relaciones internacionales y coordinación de seminarios y eventos internacionales, así como contribuye a las competencias generales y específicas del Grado en Trabajo Social, con especial atención en las transversales, desde la CT1 hasta la CT6

    Highly Anisotropic Organometal Halide Perovskite Nanowalls Grown by Glancing-Angle Deposition

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    Polarizers are ubiquitous components in current optoelectronic devices as displays or photographic cameras. Yet, control over light polarization is an unsolved challenge, since the main drawback of the existing display technologies is the significant optical losses. In such a context, organometal halide perovskites (OMHP) can play a decisive role given their flexible synthesis with tunable optical properties such as bandgap and photoluminescence, and excellent light emission with a low non-radiative recombination rate. Therefore, along with their outstanding electrical properties have elevated hybrid perovskites as the material of choice in photovoltaics and optoelectronics. Among the different OMHP nanostructures, nanowires and nanorods have lately arisen as key players in the control of light polarization for lighting or detector applications. Herein, the fabrication of highly aligned and anisotropic methylammonium lead iodide perovskite nanowalls by glancing-angle deposition, which is compatible with most substrates, is presented. Their high alignment degree provides the samples with anisotropic optical properties such as light absorption and photoluminescence. Furthermore, their implementation in photovoltaic devices provides them with a polarization-sensitive response. This facile vacuum-based approach embodies a milestone in the development of last-generation polarization-sensitive perovskite-based optoelectronic devices such as lighting appliances or self-powered photodetectors

    COVID-19 mRNA Based Vaccine Immune-Response Assessment in Nursing Home Residents for Public Health Decision

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    Nursing home residents (NHR) have been targeted as a vaccination priority due to their higher risk of worse outcome after COVID-19 infection. The mRNA-based vaccine BTN2b2 was first approved in Europe for NHRs. The assessment of the specific vaccine immune response (both humoral and cellular) at long term in NHRs has not been addressed yet. A representative sample of 624 NHR subjects in Northern region of Spain was studied to assess immune response against full vaccination with BTN2b2. The anti-S1 antibody levels and specific T cells were measured at two and six months after vaccination. 24.4% of NHR had a previous infection prior to vaccination. The remaining NHR were included in the full vaccination assessment group (FVA). After two months, a 94.9% of the FVA presented anti-S1 antibodies, whereas those seronegative without specific cellular response were 2.54%. At long-term, the frequency of NHR within the FVA group with anti-S1 antibodies at six months were 88.12% and the seronegative subjects without specific cellular response was 8.07%. The cellular immune assays complement the humoral test in the immune vaccine response assessment. Therefore, the cellular immune assessment in NHRs allows for the fine tuning of those seronegative subjects with potential competent immune responses against the vaccine

    Impact of hospitalization on nutritional status in persons aged 65 years and over (NUTRIFRAG Study): Protocol for a prospective observational study

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    Background: Malnutrition is a recurring problem that has become more relevant in recent years. The aim of this study is to assess the risk of malnutrition and nutritional status on admission and its evolution until discharge in patients aged 65 and over admitted to medical and surgical hospitalization units in hospitals of the Spanish National Health System. Methods: Prospective observational study to be carried out in the medical-surgical hospitalization units of 9 public hospitals between 01/09/2022 and 31/12/2024. Using consecutive sampling, a total of 4077 patients will be included (453 in each hospital). Variables included are related to the care process, functionality, cognition and comorbidity, risk profile, nutritional status and dysphagia; as well as frailty, dietary quality and contextual variables. The incidence of risk of malnutrition, undernutrition and dysphagia during the care process and at discharge will be calculated. The association with risk factors will be studied with logistic regression models and multivariate Cox regression models. In addition, an analysis of participants' satisfaction with food services will be carried out. The study was approved by the Ethics and Research Committee on 30/09/2020, approved for funding on 02/12/2021 and with registration number RBR-5jnbyhk in the Brazilian clinical trials database (ReBEC) for observational studies. Discussion: Some studies address nutritional status or dysphagia in older people in various care settings. However, there is a lack of large sample studies including both processes of the impact of hospitalization. The results of the project will provide information on the incidence and prevalence of both pathologies in the study subjects, their associated factors and their relationship with the average length of stay, mortality and early readmission. In addition, early detection of a problem such as malnutrition related to the disease and/or dysphagia during a hospital stay will favor the action of professionals to resolve both pathologies and improve the health status of patients.This study has been funded by Instituto de Salud Carlos III (ISCIII) through the project "PI21/00738" and co-funded by the European Union. The funders did not and will not have a role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.S
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