Edificios de ECN mediante el sistema combinado de inyección en cámara y solución de puentes térmicos. Demostrador a escala real: edificio de viviendas

La mejora de la envolvente del edificio mediante inyección de aislamiento térmico en cámara de aire es una opción de rehabilitación energética económicamente viable, sin pérdida de superficie útil, con poca incidencia en el aspecto exterior y mínima molestia al usuario. Pero para aproximarse a los Edificios de Energía Casi Nula conviene combinarlo con la resolución de puentes térmicos. Se proponen dos soluciones de intervención, desde el exterior y el interior del cerramiento, mediante paneles ligeros industrializados capaces de corregir el comportamiento en estos puntos. Se ha realizado una intervención de inyección en un demostrador en Madrid, que está siendo monitorizado como parte de la investigación del sistema de inyección y su repercusión sobre los puentes térmicos. Como segunda fase de la intervención se plantea la implementación de los sistemas de paneles

Análisis distribucional de la abeja sin aguijón Scaptotrigona mexicana (Apidae: Meliponini) en México: Información de referencia para Veracruz

Objective: To obtain the specific geographic distribution based on the stingless bee Scaptotrigonna mexicana in Mexico and the state of Veracruz. Design/methodology/approach: 2202 coordinates of the Gbif database were filtered using a spocc database manager in the programming language R. Subsequently, 55 coordinates were obtained with which multiple models of maximum entropy were calibrated with nine predictive environmental variables of 19 initials in MaxEnt 3.3 .3 in ENMeval. The best performing model (AUC> 0.897 and AICc = 0) was reclassified into 5 categories of climatic suitability with the k-means clustering technique. Results: The specific geographic distribution pattern was obtained based on the climatic suitability of S. mexicana in Mexico and Veracruz, which was classified into five categories: very low or zero, low, medium, high and very high. Here we show two large zones of climatic suitability in Mexico for S. mexicana, which could be divided by the geographical barrier of the Isthmus of Tehuantepec, the first zone is located in the Sierra Norte de Puebla and Veracruz influenced by the Transversal Mountain System and the Sierra Madre Oriental and the second in the south of the country in the South Pacific Coast, Chiapas and Guatemala. The variables that determine this pattern is the seasonality of temperature and precipitation in the wettest and driest quarter. In Veracruz, 52 municipalities were divided into two large groups with potential for the exploitation and conservation of S. mexicana, the first in the North zone and the second in the Central Zone of the state. Findings/conclusions: The incorporation of environmental variables of greater spatial and temporal resolution is necessary to extend the accuracy of the pollination pattern of S. mexicana at local scales.Objetivo: Obtener la distribución geográfica específica con base en la abeja sin aguijón Scaptotrigona mexicana en México y el estado de Veracruz. Diseño/metodología/aproximación: Se filtraron 2202 coordenadas de la base de datos Gbif utilizando un gestor de base datos spocc en el lenguaje de programación R. Posteriormente se obtuvieron 55 coordenadas con las que se calibraron múltiples  modelos de máxima entropía con nueve variables ambientales predictivas de 19 iniciales en MaxEnt 3.3.3 en ENMeval. El modelo con mejor rendimiento (AUC> 0.897 y AICc = 0) se reclasificó en cinco categorías de idoneidad climática con la técnica de clustering k-means. Resultados: Se obtuvo el patrón de distribución geográfico específico basado en la idoneidad climática de S. mexicana en México y Veracruz, el cual se clasificó en 5 categorías: muy baja o nula, baja, media, alta y muy alta. Aquí mostramos dos grandes zonas de idoneidad climática en México para S. mexicana, las cuales podrían estar divididas por la barrera geográfica del Istmo de Tehuantepec, la primera zona se localiza en la Sierra Norte de Puebla y Veracruz influenciada por el Sistema Montañoso Transversal y la Sierra Madre Oriental y la segunda al sur de país en la Costa del Pacifico Sur, Chiapas y Guatemala. En Veracruz se encontraron 50 municipios divididos en dos grandes grupos con potencial para el aprovechamiento y conservación de S. mexicana, el primero en la zona Norte y el segundo en la Zona Centro del estado. Limitaciones del estudio/implicaciones: Es necesario la incorporación de variables ambientales de mayor resolución espacial y temporal, para ampliar la precisión del patrón de polinización de S. mexicana a escalas locales. Hallazgos/conclusiones: Existen dos grandes zonas de distribución de S. mexicana en en el país, localizadas en zona norte y la zona sur delimitados claramente por el Istmo de Tehuantepec. En Veracruz hay un total de 50 municipios distribuidos en la zona norte y centro que se benefician de forma potencial por el patrón de distribución S. mexicana, con medio, alto y muy alto para el aprovechamiento de la misma

Activity of Thioallyl Compounds From Garlic Against Giardia duodenalis Trophozoites and in Experimental Giardiasis

Fresh aqueous extracts (AGEs) and several thioallyl compounds (TACs) from garlic have an important antimicrobial activity that likely involves their interaction with exposed thiol groups at single aminoacids or target proteins. Since these groups are present in Giardia duodenalis trophozoites, in this work we evaluated the anti-giardial activity of AGE and several garlic's TACs. In vitro susceptibility assays showed that AGE affected trophozoite viability initially by a mechanism impairing cell integrity and oxidoreductase activities while diesterase activities were abrogated at higher AGE concentrations. The giardicidal activities of seven TACs were related to the molecular descriptor HOMO (Highest Occupied Molecular Orbital) energy and with their capacity to modify the –SH groups exposed in giardial proteins. Interestingly, the activity of several cysteine proteases in trophozoite lysates was inhibited by representative TACs as well as the cytopathic effect of the virulence factor giardipain-1. Of these, allicin showed the highest anti-giardial activity, the lower HOMO value, the highest thiol-modifying activity and the greatest inhibition of cysteine proteases. Allicin had a cytolytic mechanism in trophozoites with subsequent impairment of diesterase and oxidoreductase activities in a similar way to AGE. In addition, by electron microscopy a marked destruction of plasma membrane and endomembranes was observed in allicin-treated trophozoites while cytoskeletal elements were not affected. In further flow cytometry analyses pro-apoptotic effects of allicin concomitant to partial cell cycle arrest at G2 phase with the absence of oxidative stress were observed. In experimental infections of gerbils, the intragastric administration of AGE or allicin decreased parasite numbers and eliminated trophozoites in experimentally infected animals, respectively. These data suggest a potential use of TACs from garlic against G. duodenalis and in the treatment of giardiasis along with their additional benefits in the host's health

Sexual Relationships in Hispanic Countries: a Literature Review

This is a pre-print of an article published in Current Sexual Health Reports. The final authenticated version is available online at: https://doi.org/10.1007/s11930-020-00272-6Purpose of Review: Sexuality is a complex dimension for which culture seems to play an important role, particularly in countries that are more traditional. This review summarizes the knowledge about sexual relationships in Hispanic countries, considering sexual debut, attitudes, behaviors, and satisfaction. Recent Findings: In line with the literature reviewed, the sexual double standard seems to be continuing to influence sexual relationships. Some countries show more open expressions of sexuality based on the level of gender inequality or sexualized context, and within countries, variables such as religious commitment, family characteristics, and access to resources may play important roles in sexuality. Summary: Future research, policies, and interventions should consider these specific characteristics, including these forms of expression of sexuality, in the adjustment of cross-cultural and cross-national strategies

Search for resonances in the mass spectrum of muon pairs produced in association with b quark jets in proton-proton collisions at root 8 and 13 TeV

A search for resonances in the mass range 12-70 GeV produced in association with a b quark jet and a second jet, and decaying to a muon pair, is reported. The analysis is based on data from proton-proton collisions at center-of-mass energies of 8 and 13 TeV, collected with the CMS detector at the LHC and corresponding to integrated luminosities of 19.7 and 35.9 fb(-1), respectively. The search is carried out in two mutually exclusive event categories. Events in the first category are required to have a b quark jet in the central region (|| 2.4) and at least one jet in the forward region (|| > 2.4). Events in the second category are required to have two jets in the central region, at least one of which is identified as a b quark jet, no jets in the forward region, and low missing transverse momentum. An excess of events above the background near a dimuon mass of 28 GeV is observed in the 8 TeV data, corresponding to local significances of 4.2 and 2.9 standard deviations for the first and second event categories, respectively. A similar analysis conducted with the 13 TeV data results in a mild excess over the background in the first event category corresponding to a local significance of 2.0 standard deviations, while the second category results in a 1.4 standard deviation deficit. The fiducial cross section measurements and 95% confidence level upper limits on those for a resonance consistent with the 8 TeV excess are provided at both collision energies

Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks

A search for supersymmetry is presented based on proton-proton collision events containing identified hadronically decaying top quarks, no leptons, and an imbalance p(T)(miss) in transverse momentum. The data were collected with the CMS detector at the CERN LHC at a center-of-mass energy of 13 TeV, and correspond to an integrated luminosity of 35.9 fb(-1). Search regions are defined in terms of the multiplicity of bottom quark jet and top quark candidates, the p(T)(miss) , the scalar sum of jet transverse momenta, and themT2 mass variable. No statistically significant excess of events is observed relative to the expectation from the standard model. Lower limits on the masses of supersymmetric particles are determined at 95% confidence level in the context of simplified models with top quark production. For a model with direct top squark pair production followed by the decay of each top squark to a top quark and a neutralino, top squark masses up to 1020 GeVand neutralino masses up to 430 GeVare excluded. For amodel with pair production of gluinos followed by the decay of each gluino to a top quark-antiquark pair and a neutralino, gluino masses up to 2040 GeVand neutralino masses up to 1150 GeVare excluded. These limits extend previous results.Peer reviewe

Search for Evidence of the Type-III Seesaw Mechanism in Multilepton Final States in Proton-Proton Collisions at root s=13 TeV

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Search for a light pseudoscalar Higgs boson produced in association with bottom quarks in pp collisions at root s=8 TeV

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Measurement of vector boson scattering and constraints on anomalous quartic couplings from events with four leptons and two jets in proton-proton collisions at root s=13 TeV

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Pseudorapidity distributions of charged hadrons in proton-lead collisions at root s(NN)=5:02 and 8.16 TeV

The pseudorapidity distributions of charged hadrons in proton-lead collisions at nucleon-nucleon center-of-mass energies root s(NN) = 5.02 and 8.16 TeV are presented. The measurements are based on data samples collected by the CMS experiment at the LHC. The number of primary charged hadrons produced in non-single-diffractive proton-lead collisions is determined in the pseudorapidity range vertical bar eta(lab)vertical bar vertical bar(vertical bar eta cm vertical bar) <0.5 are 17.1 +/- 0.01 (stat) +/- 0.59 (syst) and 20.10 +/- 0.01 (stat) +/- 0.5(syst) at root s(NN) = 5.02 and 8.16 TeV, respectively. The particle densities per participant nucleon are compared to similar measurements in proton-proton, proton-nucleus, and nucleus-nucleus collisions.Peer reviewe