Actualización, pronóstico y medidas de intervención para la tríada de la mujer deportista

El propósito de este artículo fue determinar las medidas a adoptar para prevenir, diagnosticar y tratar la tríada de la mujer deportista. Métodos: Se comparan los reportes de numerosos estudios realizados acerca de las causas, diagnóstico y tratamiento de esta entidad, con experiencia acumulada en la atención a deportistas de alto rendimiento por especialistas que laboran en este campo. Resultados: Se hizo énfasis en los factores predisponentes y desencadenantes de la aparición de la tríada y se proponen medidas preventivas y curativas de intervención. Conclusiones: Se propone una estrategia encaminada a evitar la aparición de este síndrome

Validación del potencial antioxidante de Citrus aurantium en Tabasco, México

Citrus aurantium L. (Rutaceae), commonly known as bitter orange, has multiple therapeutic potentials. An experimental qualitative study was carried out with the objective of knowing the characteristics of the consumption of C. aurantium (CA) in the Tabasco population. To validate its use, an ethanolic extract (85 %) was prepared from the dry CA leaves and phytochemical screening was performed, with subsequent quantification of the content of total phenols and flavonoids. Subsequently, antioxidant activity was determined by the DPPH assay and acute toxicity with Artemia salina. The most used parts of the plant are the leaves to relieve muscle pain, cold symptoms. In the phytochemical study it was found that the extract contains alkaloids, flavonoids, coumarins, quinones and tannins. In the thin layer chromatography of the hydroalcoholic extract, the presence of naringin was demonstrated. A total phenol content of 69.42 ± 3.47 EAG/g DM and total flavonoids of 14.78 ± 0.28 EQ/g DM were obtained. It contains antioxidant activity of 9240 ± nmol TEAC/gMS and the acute toxicity test showed moderate toxicity. The results show that the 85% ethanolic extract contains phenolic compounds and flavonoids, allowing to sustain the medicinal and pharmacological properties conferred to the plant in the state of Tabasco.Conclusions: this study showed the existence of phenols and flavonoids, the antioxidant activity of hydroalcoholic extracts from C. aurantium leaves and their moderate toxicity against Artemia salina.

The Trans-Neptunian Object (84922) 2003 VS2 through Stellar Occultations

We present results from three world-wide campaigns that resulted in the detections of two single-chord and one multi-chord stellar occultations by the plutino object (84922) 2003 VS2. From the single-chord occultations in 2013 and 2014 we obtained accurate astrometric positions for the object, while from the multi-chord occultation on 2014 November 7, we obtained the parameters of the best-fitting ellipse to the limb of the body at the time of occultation. We also obtained short-term photometry data for the body in order to derive its rotational phase during the occultation. The rotational light curve present a peak-to-peak amplitude of 0.141 ± 0.009 mag. This allows us to reconstruct the 3D shape of the body, with principal semi-axes of a = 313.8 ± 7.1 km, = - + b 265.5 9.8 8.8 km, and = - + c 247.3 43.6 26.6 km, which is not consistent with a Jacobi triaxial equilibrium figure. The derived spherical volume equivalent diameter of - + 548.3 44.6 29.5 km is about 5% larger than the radiometric diameter of 2003 VS2 derived from Herschel data of 523 ± 35 km, but still compatible with it within error bars. From those results we can also derive the geometric albedo ( - + 0.123 0.014 0.015) and, under the assumption that the object is a Maclaurin spheroid, the density r = - + 1400 300 1000 for the plutino. The disappearances and reappearances of the star during the occultations do not show any compelling evidence for a global atmosphere considering a pressure upper limit of about 1 microbar for a pure nitrogen atmosphere, nor secondary features (e.g., rings or satellite) around the main body.Fil: Benedetti Rossi, Gustavo. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia. Laboratório Interinstitucional de e-Astronomia; BrasilFil: Santos Sanz, P.. Instituto de Astrofísica de Andalucía; EspañaFil: Ortiz, J. L.. Instituto de Astrofísica de Andalucía; EspañaFil: Assafin, M.. Observatório do Valongo; BrasilFil: Sicardy, B.. Sorbonne University; Francia. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Morales, N.. Instituto de Astrofísica de Andalucía; EspañaFil: Vieira Martins, R.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. Laboratório Interinstitucional de e-Astronomia; Brasil. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Duffard, R.. Instituto de Astrofísica de Andalucía; EspañaFil: Braga Ribas, F.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. Laboratório Interinstitucional de e-Astronomia; Brasil. Centre National de la Recherche Scientifique. Observatoire de Paris; Francia. Universidade Tecnologia Federal do Parana; BrasilFil: Rommel, F. L.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. Laboratório Interinstitucional de e-Astronomia; BrasilFil: Camargo, J. I. B.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; Brasil. Laboratório Interinstitucional de e-Astronomia; BrasilFil: Desmars, J.. Instituto de Astrofísica de Andalucía; EspañaFil: Colas, A. F.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Vachier, F.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Alvarez Candal, A.. Ministério de Ciencia, Tecnologia e Innovacao. Observatorio Nacional; BrasilFil: Fernández Valenzuela, E.. University of Central Florida; Estados UnidosFil: Almenares, L.. Universidad de la Republica; UruguayFil: Artola, R.. Estación Astrofísica de Bosque Alegre; ArgentinaFil: Baum, T. P.. Observatoire Astronomique des Makes; FranciaFil: Behrend, R.. Observatoire de Genève; ItaliaFil: Bérard, D.. Centre National de la Recherche Scientifique. Observatoire de Paris; FranciaFil: Bianco, F. B.. University of Delaware; Estados Unidos. University of New York; Estados UnidosFil: Brosch, N.. Universitat Tel Aviv; IsraelFil: Ceretta, A.. Observatorio Astronómico Los Molinos; UruguayFil: Colazo, C. A.. Estación Astrofísica de Bosque Alegre; ArgentinaFil: Gomes Junior, A. R.. Laboratório Interinstitucional de e-Astronomia; Brasil. Universidade Estadual Paulista Julio de Mesquita Filho. Faculdade de Engenharia; BrasilFil: Ivanov, V. D.. Observatorio Europeo del Sur; AlemaniaFil: Jehin, E.. Université de Liège; BélgicaFil: Kaspi, S.. Universitat Tel Aviv; IsraelFil: Gil Hutton, Ricardo Alfredo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico "El Leoncito". Universidad Nacional de Córdoba. Complejo Astronómico "El Leoncito". Universidad Nacional de la Plata. Complejo Astronómico "El Leoncito". Universidad Nacional de San Juan. Complejo Astronómico "El Leoncito"; Argentin

Clay calcination technology: state-of-the-art review by the RILEM TC 282-CCL

The use of calcined clays as supplementary cementitious materials provides the opportunity to significantly reduce the cement industry’s carbon burden; however, use at a global scale requires a deep understanding of the extraction and processing of the clays to be used, which will uncover routes to optimise their reactivity. This will enable increased usage of calcined clays as cement replacements, further improving the sustainability of concretes produced with them. Existing technologies can be adopted to produce calcined clays at an industrial scale in many regions around the world. This paper, produced by RILEM TC 282-CCL on calcined clays as supplementary cementitious materials (working group 2), focuses on the production of calcined clays, presents an overview of clay mining, and assesses the current state of the art in clay calcination technology, covering the most relevant aspects from the clay deposit to the factory gate. The energetics and associated carbon footprint of the calcination process are also discussed, and an outlook on clay calcination is presented, discussing the technological advancements required to fulfil future global demand for this material in sustainable infrastructure development

The Size, Shape, Albedo, Density, and Atmospheric Limit of Transneptunian Object (50000) Quaoar from Multi-chord Stellar Occultations

We present results derived from the first multi-chord stellar occultations by the transneptunian object (50000) Quaoar, observed on 2011 May 4 and 2012 February 17, and from a single-chord occultation observed on 2012 October 15. If the timing of the five chords obtained in 2011 were correct, then Quaoar would possess topographic features (crater or mountain) that would be too large for a body of this mass. An alternative model consists in applying time shifts to some chords to account for possible timing errors. Satisfactory elliptical fits to the chords are then possible, yielding an equivalent radius R [SUB]equiv[/SUB] = 555 ± 2.5 km and geometric visual albedo p[SUB]V[/SUB] = 0.109 ± 0.007. Assuming that Quaoar is a Maclaurin spheroid with an indeterminate polar aspect angle, we derive a true oblateness of \epsilon = 0.087^{+0.0268}_{-0.0175}, an equatorial radius of 569^{+24}_{-17} km, and a density of 1.99 ± 0.46 g cm[SUP]–3[/SUP]. The orientation of our preferred solution in the plane of the sky implies that Quaoar's satellite Weywot cannot have an equatorial orbit. Finally, we detect no global atmosphere around Quaoar, considering a pressure upper limit of about 20 nbar for a pure methane atmosphere.Peer reviewe

A ring system detected around the Centaur (10199) Chariklo

Until now, rings have been detected in the Solar System exclusively around the four giant planets. Here we report the discovery of the rst minor-body ring system around the Centaur object (10199) Chariklo, a body with equivalent radius 124±9 km. A multi-chord stellar occultation revealed the presence of two dense rings around Chariklo, with widths of about 7 km and 3 km, optical depths 0.4 and 0.06, and orbital radii 391 and 405 km, respectively. The present orientation of the ring is consistent with an edge-on geometry in 2008, thus providing a simple explanation for the dimming of Chariklo's system between 1997 and 2008, and for the gradual disappearance of ice and other absorption features in its spectrum over the same period. This implies that the rings are partially composed of water ice. These rings may be the remnants of a debris disk, which were possibly con ned by embedded kilometre-sized satellites

Ten golden rules for optimal antibiotic use in hospital settings: the WARNING call to action

Antibiotics are recognized widely for their benefits when used appropriately. However, they are often used inappropriately despite the importance of responsible use within good clinical practice. Effective antibiotic treatment is an essential component of universal healthcare, and it is a global responsibility to ensure appropriate use. Currently, pharmaceutical companies have little incentive to develop new antibiotics due to scientific, regulatory, and financial barriers, further emphasizing the importance of appropriate antibiotic use. To address this issue, the Global Alliance for Infections in Surgery established an international multidisciplinary task force of 295 experts from 115 countries with different backgrounds. The task force developed a position statement called WARNING (Worldwide Antimicrobial Resistance National/International Network Group) aimed at raising awareness of antimicrobial resistance and improving antibiotic prescribing practices worldwide. The statement outlined is 10 axioms, or “golden rules,” for the appropriate use of antibiotics that all healthcare workers should consistently adhere in clinical practice

Introducing a cross federation identity solution for converged network environments

The Future Internet architecture, based on the integration of existing networks and services, and the addition of many new devices like sensors, face a series of important technical challenges, one of them being the management of diverse user identities. The diversity and plethora of the services and procedures affected by the unassociated existing user identities stress the necessity for a holistic solution to deal with the different aspects of the identity management problem. Existing efforts propose limited identity solutions that can only be applied within well defined boundaries and cannot extend their functionality to support converged network environments and service operations across different administrative domains. This paper presents a Dynamic Identity Mapping Association N'Discovery System (DIMANDS) as a holistic identity solution for large scale heterogeneous network environments. This solution offers cross federation identity services and is based on a uni versal discovery mechanism which spans across different networks, layers and federations. It is also empowered with a unified trust framework which can collect and process diverse trust information to provide trust decisions on a widely accepted format

Paper of RILEM TC 282-CCL: mineralogical characterization methods for clay resources intended for use as supplementary cementitious material

status: publishe

Paper of RILEM TC 282-CCL: mineralogical characterization methods for clay resources intended for use as supplementary cementitious material

To respond to the rapid introduction and development of calcined clays as supplementary cementitious material (SCM), the toolbox of characterization methods for cementitious materials requires extension to raw clay characterization. Borrowing concepts and methods developed in the field of clay mineralogy, this paper outlines the merits and limits of widely accessible characterization techniques for raw clays intended for use as SCM, when calcined. The paper focuses mainly on the identification and quantification of the raw clay mineral components, as these characteristics have important implications for further material processing and performance. General notes are provided on clay sampling and pre-treatment as well as bulk chemical analysis. The main techniques considered are X-ray diffraction, thermal analysis and infrared spectroscopy. Their application on raw clays is introduced, highlighting clay-specific aspects of sample preparation, data acquisition, and processing. Guidelines and interpretation tables are provided to aid in the analysis of the acquired data, while limitations and potential interferences are identified. Options for remote prospection by infrared spectroscopy are included as well. To illustrate the type of information to be gained and the complementarity of the techniques, two representative raw clays are fully characterised. This paper aims to highlight that mineralogical characterization is a feasible and often necessary step in the study and assessment of raw clays that can deliver a wealth of informative data if carried out appropriately