2.5-MHD models of circumstellar discs around FS~CMa post-mergers : I. Non-stationary accretion stage

We investigate the dynamic evolution of gaseous region around FS~CMa post-mergers. Due to the slow rotation of a central B-type star, the dynamics is driven mainly by the magnetic field of the central star. Recent observations have allowed us to set a realistic initial conditions such as, the magnetic field value ($B_\star\approx6\times10^{3}G$), the mass of the central star ($M_\star=6M_\odot$), and the initial disc density $\rho_{d0}\in[10^{-13}\mathrm{g\,cm^{-3}},10^{-11}\mathrm{g \, cm^{-3}}]$. We use the PLUTO code to perform 2.5D-MHD simulations of thin and thick discs models. Especially relevant for the interpretation of the observed properties of FS~CMa post-mergers are the results for low-density discs, in which we find formation of a jet emerging from inner edge of the disc, as well as the formation of the so called "hot plasmoid" in the corona region. Jets are probably detected as discrete absorption components in the resonance lines of FS~CMa stars. Moreover, the magnetic field configuration in the low-density plasma region, favors the appearance of magnetocentrifugal winds from the disc. The currents toward the star created by the magnetic field may explain accidentally observed material infall. The disc structure is significantly changed due to the presence of the magnetic field. The magnetic field is also responsible for the formation of a hot corona as observed in several FS~CMa stars through the Raman lines. Our results are valid for all magnetic stars surrounded by a low density plasma, i.e., some of stars showing the B[e] phenomenon.Comment: 12 pages, 6 figure

Fructose stimulated de novo lipogenesis is promoted by inflammation

Benign hepatosteatosis, affected by lipid uptake, de novo lipogenesis and fatty acid (FA) oxidation, progresses to non-alcoholic steatohepatitis (NASH) on stress and inflammation. A key macronutrient proposed to increase hepatosteatosis and NASH risk is fructose. Excessive intake of fructose causes intestinal-barrier deterioration and endotoxaemia. However, how fructose triggers these alterations and their roles in hepatosteatosis and NASH pathogenesis remain unknown. Here we show, using mice, that microbiota-derived Toll-like receptor (TLR) agonists promote hepatosteatosis without affecting fructose-1-phosphate (F1P) and cytosolic acetyl-CoA. Activation of mucosal-regenerative gp130 signalling, administration of the YAP-induced matricellular protein CCN1 or expression of the antimicrobial peptide Reg3b (beta) peptide counteract fructose-induced barrier deterioration, which depends on endoplasmic-reticulum stress and subsequent endotoxaemia. Endotoxin engages TLR4 to trigger TNF production by liver macrophages, thereby inducing lipogenic enzymes that convert F1P and acetyl-CoA to FA in both mouse and human hepatocytes

SUPLEMENTO DEL XV CONGRESO INTERNACIONAL DE ACTIVIDAD FÍSICA Y DEPORTE. 17,18 y 19 DE OCTUBRE DEL 2018. ENSENADA, BAJA CALIFORNIA, MÉXICO

Compendio, en formato artículo, de los mejores trabajos presentados en el XV CONGRESO INTERNACIONAL DE ACTIVIDAD FÍSICA Y DEPORTE celebrado los días  17,18 y 19 de octubre del 2018 en la Universidad Autónoma de Baja California en la ciudad de Ensenada, Baja California, México:La nutrición en la actividad física y deportiva: alimentos funcionales con nanotecnología, aplicaciones potenciales. González González, K.Y.; Huerta Plaza, B.A.; Amaya Parra, G. (118-130)Perfil antropométrico, físico y hábitos alimentarios en escolares indígenas de Tijuana México. Avendaño Cano, D.L.; Gómez Miranda, L.M.; Aburto Corona, J.A. (131-142)Relación entre el clima de aprendizaje en Educación Física y la percepción de los estudiantes en las competencias del profesorado. Baños, R; Ortiz-Camacho, M.M.; Baena-Extremera, A.; Granero-Gallegos, A.; Machado-Parra, J.P.; Rentería, I.; Acosta, I.; Ramírez, L. (143-153)Valoración de capacidades físicas, composición corporal y consumo de vitaminas en una competencia de Crossfit. Cervantes-Hernández, N.; Hernández Nájera, N.; Carrasco Legleu, C.E.; Candia Lujan, R.; Enríquez Del Castillo, L.A. (154-164)Relación de la actividad física, características antropométricas y VO2máx en jóvenes universitarios: características por género. Enríquez-del Castillo, L.A.; Cervantes-Hernández, N.; Carrasco-Legleu, C.E.; Candia Luján, R. (165-174)Entrenamiento vibratorio de cuerpo completo y sus efectos sobre la composición corporal en jóvenes universitarios. Flores-Chico, B.; Bañuelos-Teres, L.E.; Buendía Lozada, E.R.P. (175-183)Actualización curricular, plan 2016 de la Licenciatura en Cultura Física de la BUAP. Flores-Chico, B.; Flores-Flores, A.; López de La Rosa, LE.; Aguilar-Enríquez, R.I.; Caballero Gómez, JM; Villanueva-Huerta, JA. (184-192)Evaluación psicológica y de la musculatura isquiosural de basquetbolistas universitarias en distintas etapas deportivas. Moranchel-Charros, R.; Martínez-Velázquez, E.S. (193-203)Efecto del ejercicio físico sobre la fuerza, resistencia y riesgo de caída en mujeres adultas. Ortiz Ortiz, M; Espinoza Gutiérrez, R; Gómez Miranda, LM.; Guzmán Gutiérrez, EC.; Calleja Núñez, JJ. (204-212)Desigualdad vs igualdad numérica y su efecto en la técnica de jugadores de fútbol infantil. Vega-Orozco, SI; Gavotto Nogales, OI; Bernal Reyes, F; Horta Gim, MA; Sarabia Sainz, HM. (213-224

Avifauna del parque estatal Cerro de la Tortuga, Morelos, México

Los patrones de distribución y extinción de la biodiversidad subrayan la necesidad urgente de proteger los hábitats. El estado de Morelos alberga más de 400 especies de aves, 35.6% de la diversidad total nacional. El parque estatal cerro de la tortuga, área natural protegida del estado de Morelos, es de los últimos remanentes de vegetación del centro-sur del estado. Hasta ahora no se conocía la avifauna presente en esta región, por lo cual, este estudio representa el primer listado y análisis de la diversidad avifaunística presente en esta área natural protegida. Realizando muestreos mensuales de marzo a octubre del 2017, a través de puntos de conteo, redes de niebla y búsquedas intensivas, procurando registrar el mayor número de especies presentes. Se registraron un total de 125 especies de aves, que se agruparon en diferentes gremios tróficos, categorías de residencia, endemismo y amenaza. De las 125 especies de aves presentes en el área natural protegida, 11 se encuentran bajo alguna categoría de amenaza y 22 con alguna categoría de endemismo. El cerro de la tortuga, a pesar de ser un área de poca extensión territorial, representa un área de importancia para la conservación de la avifauna mexicana en el estado de Morelos

Nature and photoreactivity of of TiO2-rGO nanocomposites in aqueous suspensions under UV-A irradiation

This Accepted Manuscript will be available for reuse under a CC BY-NC-ND licence after 24 months of embargo periodDifferent studies to unravel the nature of the activity of TiO2 photocatalysts modified with rGO were carried out. The band edge potentials and the band gap energy of the nanocomposites were determined by performing electrochemical impedance and UV–vis diffuse reflectance measurements, respectively. However, no changes were observed when TiO2 is modified with rGO. Nevertheless, the presence of rGO in the hybrid composite led to a low charge transfer resistance across the electrode-electrolyte interface, observing even a tenfold increase in the photocurrent values in methanol photo-oxidation for P25-rGO 1%. Moreover, a higher oxygen reduction current was found when increasing the rGO concentration that could lead to a higher ROS formation. In order to analyze the beneficial properties of the hybrid materials, the influence of rGO doping ratio on oxalic acid photocatalytic degradation and on oxalic acid adsorption onto the nanocomposites surface was studied, both of them under UV-A light irradiation. In addition, the photoactivity of the conduction band electrons and the valence band holes was investigated by performing EPR and transient absorption spectroscopy measurements under UV-A illumination in O2 or N2 atmospheres. It was demonstrated that rGO behaved as an electron acceptor. Finally, TAS results under O2 and N2 atmospheres proved that the role played by rGO was not as crucial in excess of dissolved O2 as in N2 atmosphere. These findings agree with the observed photocatalytic activity and EPR measurements. Nevertheless, generation of HO[rad] in N2 saturated suspensions was highly increased with the addition of rGOThis work has been supported by the Spanish Plan Nacional de I+D+i through the project CTM2015-64895-R and CTM2016-76454-R. Alvaro Tolosana-Moranchel thanks to Ministerio de Educación, Cultura y Deporte for his FPU grant (FPU14/01605

AVIFAUNA DEL PARQUE ESTATAL CERRO DE LA TORTUGA, MORELOS, MÉXICO

Patterns of distribution and extinction of biodiversity underscore the urgent need to protect habitats. The state of Morelos has more than 400 species of birds, 35.6% of the total national diversity. The Cerro de la Tortuga State Park, protected natural area of the state of Morelos, is one of the last remnants of vegetation in the center-south of the state. Until now, the avifauna present in this region was not known, for which reason, this study presents a list and analysis of avifauna diversity present in this protected natural area. Monthly samplings were carried out, from March to October 2017, through counting points, mist nets and intensive searches, trying to register the largest number of species present. A total of 125 bird species were recorded, grouped into different trophic guilds, residence categories, endemism and threat. Of the 125 species of birds present in the protected natural area, 11 are under some category of threat and 22 with some category of endemism. The Cerro de la Tortuga, despite being an area of little territorial extension, represents an area of importance for the conservation of the Mexican avifauna in the state of Morelos.Los patrones de distribución y extinción de la biodiversidad subrayan la necesidad urgente de proteger los hábitats. El estado de Morelos alberga más de 400 especies de aves, 35.6% de la diversidad total nacional. El Parque Estatal Cerro de la Tortuga, área natural protegida del estado de Morelos, es de los últimos remanentes de vegetación del centro-sur del estado. Hasta ahora no se conocía la avifauna presente en esta región, por lo cual, este estudio representa el primer listado y análisis de la diversidad avifaunística presente en esta área natural protegida. Realizando muestreos mensuales de marzo a octubre del 2017, a través de puntos de conteo, redes de niebla y búsquedas intensivas, procurando registrar el mayor número de especies presentes. Se registraron un total de 125 especies de aves, que se agruparon en diferentes gremios tróficos, categorías de residencia, endemismo y amenaza. De las 125 especies de aves presentes en el área natural protegida, 11 se encuentran bajo alguna categoría de amenaza y 22 con alguna categoría de endemismo. El Cerro de la Tortuga, a pesar de ser un área de poca extensión territorial, representa un área de importancia para la conservación de la avifauna mexicana en el estado de Morelos

TiO2-reduced graphene oxide nanocomposites: Microsecond charge carrier kinetics

This Accepted Manuscript will be available for reuse under a CC BY-NC-ND licence after 24 months of embargo periodIn this work, transient absorption spectroscopy studies in the microsecond time scale were carried out to investigate the dynamics of photogenerated electron-hole pairs in TiO2-rGO nanocomposites, prepared by a hydrothermal method, under different atmospheres: N2, O2, and N2 saturated in CH3OH. Under N2 atmosphere, the transient absorption signal detected in the region between 450 and 700 nm dropped as the rGO mass concentration in the composite was raised. The electron transfer from TiO2 to rGO was confirmed by using a model based on fractal surfaces which describes the decay kinetics. In the presence of methanol as hole acceptor, P25-rGO 0.5% and 1% were able to reach the maximum transient absorption faster than the other studied nanocomposites. However, after 10 μs, the P25-rGO 0.1% nanocomposite yielded the highest transient absorption signal and the best conversion and initial reaction rate in the photocatalytic degradation of dichloroacetic acid in aqueous suspensions. The effect of rGO on free electrons was investigated by detecting the transient signal at 980 nm under N2 saturated in CH3OH, for the different samples. It was found that the measured signals followed the same response than at 660 nm further evincing the electron transfer process. No sensitization effect of rGO was observed when the samples were excited at 450 nm.This work has been supported by the Spanish Plan Nacional de I+D+i through the project CTM2015-64895-R. Alvaro Tolosana-Moranchel thanks to Ministerio de Educación, Cultura y Deporte for his FPU grant (FPU14/01605) and (EST16/00065). The authors are also grateful to Technical Research Support Unit of Instituto de Catálisis y Petroleoquímica (CSIC