Condroblastoma de astrágalo: localización inusual

Se expone 1 caso de un condroblastoma de astrágalo en 1 paciente de 17 años. Esta tumoración, definida como tal en 1942 por Jaffe y Lichtenstein, presenta un comportamiento benigno que responde al tratamiento mediante curetaje e injerto óseo de la cavidad. A pesar de este comportamiento benigno se hace mención a la posibilidad de metástasis pulmonares y a la agresividad local en algunos casos.A 17-year-old man with chondroblastoma of the talus is reported. This tumor described in 1942 by Jaffe and Lichtenstein has a benign behavior and a good response to surgical treatment by curetage of the cavity and bone graft. In certain cases local aggresivity and lung metastasis has been described

Killing spinor initial data sets

A 3+1 decomposition of the twistor and valence-2 Killing spinor equation is made using the space spinor formalism. Conditions on initial data sets for the Einstein vacuum equations are given so that their developments contain solutions to the twistor and/or Killing equations. These lead to the notions of twistor and Killing spinor initial data. These notions are used to obtain a characterisation of initial data sets whose development are of Petrov type N or D.Comment: 31 pages, submitted to J. Geom. Phy

Envejecimiento hidrotérmico en nanocompuestos epoxi/organoarcilla

Las dispersiones de organoarcillas como refuerzo en nanocompuestos de matriz polimérica han sido ampliamente estudiadas como una vía en la mejora de las propiedades (mecánicas, térmicas, de barrera frente a gases y disolventes e inflamabilidad). Una ventaja añadida es que se consigue una mejora de propiedades con la adición de una pequeña cantidad de refuerzo. En este trabajo se han preparado nanocompuestos basados en una matriz epoxi tipo DGEBA reforzada con dos organoarcillas, C30B e I.30E. Con el fin de mejorar la interfase matriz-refuerzo, también se han preparado nanocompuestos en los que las organoarcillas han sido previamente funcionalizadas a través del anclaje a la superficie de las mismas de un agente silano que contiene grupos reactivos con la matriz. Se ha realizado el estudio de la absorción de agua de estos nanocompuestos a temperatura constante hasta alcanzar el equilibrio de hinchamiento, determinando gravimétricamente la cantidad de agua absorbida en función del tiempo. El análisis de los resultados mediante el modelo de Fick y Langmuir nos ha permitido obtener los valores de los coeficientes de difusión (D). Los nanocompuestos han sido caracterizados mediante Difracción de Rayos X (DRX) y Calorimetría Diferencial de Barrido (DSC). Los valores de D obtenidos por el modelo de Fick son menores que los hallados a través del modelo de Langmuir, el cual se ajusta mejor a los valores experimentales. Como resultado y de acuerdo con la bibliografía, se ha observado que la presencia de las organoarcillas disminuyen el valor de D debido al camino tortuoso que ha de seguir el agua a través del nanocompuesto. Sin embargo, la presencia de grupos silano no mejora los resultados obtenidos del coeficiente de difusión para los nanocompuestos epoxi/organoarcilla

Influence of the epoxy/amine stoichiometry on the thermomechanical properties of nanocomposites based on high Tg epoxy and organophilic clays.

In layered silicate-epoxy nanocomposites organic modification of the silicates makes them compatible with the epoxy which intercalates into the clay galleries. The effect of clay dispersion on epoxies of high Tg is not clear. Decreases of the epoxy Tg have been frequently reported. The presence of clay may cause stoichiometry imbalances that conduces to the formation of imperfect network

Effects of a concurrent exercise training program on low back and sciatic pain and pain disability in late pregnancy

Objective: The aim of the present study was to explore the influence of a concurrent exercise (aerobic + resistance) training program, from the 17th gestational week (g.w.) until birth on low back and sciatic pain, and pain disability. A total of 93 pregnant women divided into exercise (n = 49) and control (n = 44) groups followed a 60-min, 3 days/week, concurrent exercise training. Methods: Low back and sciatic pain were measured with a Visual Analogic Scale (VAS). The disability resulting from pain was assessed with the Oswestry Disability Index (ODI). Measures were performed at the 16th and 34th g.w. Results: The exercise group increased 21.9 mm less the VAS low back (between-group differences (B): 95% CI: −33.6 to −10.2; p < 0.001) and 12.9 mm less the VAS sciatica score (between-group differences: 95% CI (B): −21.8 to −4.0; p = 0.005) than the control group. Regarding the ODI questionnaire, the exercise group increased 0.7, 0.5, and 0.7 less than the control group in pain while sleeping (between-group differences (B): 95% CI: −1.4 to −0.01; p = 0.025), pain while lifting weight (between-group differences (B): 95% CI: −0.9 to −0.01; p = 0.016), and limitations of the social life due to pain (between-group differences(B): 95% CI: −1.3 to −0.06; p = 0.032). Furthermore, the exercise group suffered 6.9% less pain than the control group in the ODI total score (between-group differences (B): 95% CI: −13.9 to 0.053; p = 0.052). Conclusion: This concurrent exercise training program adapted to pregnant women improved pain compared to controls.Funding information Regional Ministry of Health of the Junta de Andalucía, Grant/Award Number: PI-0395-2016; Spanish Ministry of Education, Culture, and Sports, Grant/Award Number: FPU17/03715; University of Granada, Excellence actions: Units of Excellence; Unit of Excellence on Exercise and Health (UCEES), and by the Junta de Andalucía, Consejería de Conocimiento, Investigación y Universidades and European Regional Development Fund (ERDF), Grant/ Award Number: REF. SOMM17/6107/UGR10 página

Análisis de los Másteres universitarios españoles relacionados con las ciencias del deporte

La finalidad del presente estudio es aportar una visión global del estado de los Másteres españoles relacionados con las ciencias del deporte, conseguir conocerlos en profundidad, para poder establecer marcadores de calidad, que permita obtener de forma rápida y sencilla una valoración general de cada uno de ellos. Los objetivos del presente estudio son: a) analizar la Estructura Académica de los Másteres oficiales universitarios españoles relacionados con las ciencias del deporte; b) analizar las Características del profesorado que imparte su docencia; y c) analizar el Tipo de Evaluación de las asignaturas que lo componen. Para ello, se estudiaron cuarenta y cuatro Másteres localizados en la Agencia Nacional de Evaluación de la Calidad y Acreditación (ANECA), a través de sus páginas webs oficiales. En cuestiones relacionadas con el profesorado, se utilizó también la base de datos de Tesis Doctorales (TESEO). Los resultados que arroja el estudio señalan que: a) la totalidad de los másteres estudiados son de temática general y gestión, de un año de duración, presenciales, con horario mayoritario de tarde, o mañana/tarde, se desarrollan a lo largo de la semana, y el criterio principal de acceso es el expediente académico; b) la mayoría de los másteres universitarios analizados, no presentan objetivos, ni competencias, ni definen salidas profesionales, ni ofrecen prácticas externas; c) su precio medio es de 5151€, con 34 plazas ofertadas, y ajustados al EESS en cuanto a sus créditos; d) El número de tesis medio por profesor es de dos, con mayoría de hombres en los equipos docentes; y e) en cuanto a las características de las asignaturas, no suelen ser reflejadas en sus guías docentes. Como conclusión se puede señalar que es necesario ajustar estos aspectos para ofrecer un servicio de mayor calidad

Valorization of Prickly Pear [<em>Opuntia ficus-indica</em> (L.) Mill]: Nutritional Composition, Functional Properties and Economic Aspects

Opuntia ficus-indica (L.) Mill, usually named prickly pear or nopal cactus, is the Cactaceae plant with the greatest economic relevance in the world. It is a tropical or subtropical plant, native to tropical and subtropical America, which can grow in arid and semiarid climates. Prickly pear is mainly known by its fruits, popularly named “tunas” or “figs,” but their cladodes are also consumed, principally in Mexico, which is the country with the largest cultivated area and the largest producer. There is ample evidence of the health benefits of prickly pear: it shows high antioxidant activity, it is a source of nutrients and vitamins and it presents medicinal uses, among others. Furthermore, prickly pear presents other uses, including cosmetics, biofuel production, animal nutrition and soil phytoremediation

Long term oscillations of Mediterranean sardine and anchovy explained by the combined effect of multiple regional and global climatic indices

This study is a contribution to the PELWEB project (“Winners, losers and shifts of PELagic food WEB changes in the western Mediterranean Sea: from ecosystem consequences to future projections”, CTM2017-88939-R,2018–2020), and to “Fostering the capacity of marine ecosystem models to PROject the cumulative effects of global change and plausible future OCEANS” (PROOCEANS): Funding by Ministerio de Ciencia e Innovación, Proyectos de I+D+I (RETOS-PID2020-118097RB-I00).It is widely known that the abundance and distribution dynamics of populations of small pelagic clupeid fish, such as sardines and anchovies, are affected by large-scale climate variability, which may lead to changeovers to new regimes of small pelagics. However, long-distance climatic oscillations, such as El Niño/La Niña and the Pacific Decadal Oscillation, have been little explored in the Western Mediterranean Sea. We investigated the possible effects of the South Oscillation Index (i.e. the atmospheric oscillation coupled with the El Niño/La Niña) and Pacific Decadal Oscillation on fluctuations in catches of European anchovy (Engraulis encrasicolus) and sardine (Sardina pilchardus) in the Western Mediterranean Sea, and their association with regional climate oscillations (i.e. the Atlantic Multidecadal Oscillation, the North Atlantic Oscillation, the Western Mediterranean Oscillation index, and the Arctic Oscillation)

Physical fitness and maternal body composition indices during pregnancy and postpartum: the GESTAFIT project

ABSTRACT We explored the association of physical fitness (PF) during pregnancy with maternal body composition indices along pregnancy and postpartum period. The study comprised 159 pregnant women (32.9 ± 4.7 years old). Assessments were carried out at the 16th and 34th gestational weeks (g.w.) and six weeks postpartum. Cardiorespiratory fitness (CRF), muscular strength (absolute and relative values) and flexibility were measured. Body composition indices were obtained by using dual-energy X-ray absorptiometry at postpartum. The results, after adjusting for potential covariates at the 16th g.w., indicated that greater CRF was associated with lower postpartum indices total fat mass, android and gynoid fat mass (all, p < 0.05). Greater absolute upper-body muscular strength was associated with greater pre-pregnancy body mass index (BMI), gestational weight gain (GWG); and postpartum indices body weight, BMI, lean mass, fat free mass, fat mass, gynoid fat mass, T-score and Z-score bone mineral density (BMD) (all, p < 0.05). Greater upper-body flexibility was associated with lower pre-pregnancy BMI; and postpartum indices body weight, BMI, lean mass, fat free mass, fat mass, android fat mass and gynoid fat mass, and with greater GWG (all, p < 0.05). At the 34th g.w., greater CRF was additionally associated with greater postpartum T-score and Z-score BMD (both, p < 0.05). In conclusion, this study reveals that greater PF levels, especially during early pregnancy, may promote a better body composition in the postpartum period. Therefore, clinicians and health promoters should encourage women to maintain or improve PF levels from early pregnancy. KEYWORDS Cardiorespiratory fitness; strength; flexibility; bone density; gestation Highlights . Given that obesity is on the rise today, it is important to find strategies to cope with it, especially during pregnancy. . The results of the present study suggest that greater physical fitness during early pregnancy is key to promoting better body composition in the postpartum period. . It should be of clinical interest to encourage pregnant women to maintain or improve their physical fitness levels