A novel technique based in a cylindrical microwave resonator for high pressure phase equilibrium determination

Producción CientíficaThe development of a novel technique based on a cylindrical microwave resonator for high pressure phase equilibrium determination is described. Electric permittivity or dielectric constant is a physical property that depends on temperature and pressure ε(p,T). Based on this property, a measuring technique consisting of a cylindrical resonant cavity that works in the microwave spectrum has been developed. Equilibrium data of fluid mixtures are measured at high pressure using a synthetic method, where phase transition is determined under isothermal conditions due to the change of the dielectric constant. This technique may be a more accurate alternative to conventional visual synthetic methods. The technique was validated measuring pure CO2, and phase behaviour was then determined for two binary mixtures [CO2 (0.6) + CH4 (0.4)] and [CO2 (0.4) + CH4 (0.6)], results for which are presented. These systems are interesting for the study of biogas–like mixtures. In addition, data were compared with the equation of state used for natural gas GERG-2008, and also, they were modelled using Peng-Robinson equation of state and Wong- Sandler mixing rules, which are widely employed in chemical industries and which give good results.Trabajo financiado por el Ministerio de Industria, Economía y Competitividad (ENENE2013-47812-R y ENE2017-88474-R) y la Junta de Castilla y León (VA035U16 y VA280P18

Percepción directiva del impacto de los vuelos de bajo coste en la gestión hotelera: su influencia en la innovación.

La amplia competitividad actual del sector turístico internacional hace necesario analizar aquellos factores que inciden directamente en la productividad de la industria turística. En esta línea, el presente artículo pretende analizar los efectos en los hoteles andaluces del incremento de afluencia de turistas internacionales que llegan al territorio en los vuelos de bajo coste y estudiar si la influencia de esta tipología de turistas se refleja en el desarrollo de mejoras aplicadas a la gestión hotelera. Sobre todo, se pretende analizar si la percepción de los directores de esta nueva tendencia turística promueve la innovación y la introducción de las TICs en sus organizaciones y si estas mejoras logran un mayor desempeño de su actividad, vía una mayor atracción de turistas extranjeros. Para ello, este estudio analiza los resultados obtenidos de un total 205 encuestas recibidas, realizadas por directores de hoteles de todas las categorías situados en la Comunidad Autónoma Andaluza. Los resultados obtenidos establecen que la percepción de los directivos de los hoteles sobre la afluencia de turistas en vuelos de bajo coste está asociada de forma positiva y muy significativa con el uso de Internet y de forma significativa con el porcentaje de ocupación con turistas extranjeros y no muestra relación alguna con la existencia en la empresa de innovativeness o cultura organizativa que apoye la generación de innovaciones.Due to the growing current competitiveness of international tourism it has becomes necessary to analyze the factors that directly influence the productivity of the tourism industry. This article aims to analyze the effects on Andalusia hotels caused by the increase of international tourists arriving in the territory on low-cost flights. Also, we will consider whether the influence of this tourist typology is reflected in the development of enhancements in hotel management. Above all, it aims to analyze whether the perception of directors regarding this new tourist trend promotes innovation and the introduction of TICs in their organizations. For this reason, the study analyzes the results of a total of 205 surveys received by managers from every hotel category in the Autonomous Community. The results show that the perception of managers of the hotels on the influx of tourists in cheap air travel is associated positively and significantly with the use of the Internet and significantly with the percentage of occupation. However, there is no relationship with the existence in the company of innovation or organizational culture that supports the generation of innovations

Negative Regulation of Abscisic Acid Signaling by the Fagus sylvatica FsPP2C1 Plays A Role in Seed Dormancy Regulation and Promotion of Seed Germination

FsPP2C1 was previously isolated from beech (Fagus sylvatica) seeds as a functional protein phosphatase type-2C (PP2C) with all the conserved features of these enzymes and high homology to ABI1, ABI2, and PP2CA, PP2Cs identified as negative regulators of ABA signaling. The expression of FsPP2C1 was induced upon abscisic acid (ABA) treatment and was also up-regulated during early weeks of stratification. Furthermore, this gene was specifically expressed in ABA-treated seeds and was hardly detectable in vegetative tissues. In this report, to provide genetic evidence on FsPP2C1 function in seed dormancy and germination, we used an overexpression approach in Arabidopsis because transgenic work is not feasible in beech. Constitutive expression of FsPP2C1 under the cauliflower mosaic virus 35S promoter confers ABA insensitivity in Arabidopsis seeds and, consequently, a reduced degree of seed dormancy. Additionally, transgenic 35S:FsPP2C1 plants are able to germinate under unfavorable conditions, as inhibitory concentrations of mannitol, NaCl, or paclobutrazol. In vegetative tissues, Arabidopsis FsPP2C1 transgenic plants show ABA-resistant early root growth and diminished induction of the ABA-response genes RAB18 and KIN2, but no effect on stomatal closure regulation. Seed and vegetative phenotypes of Arabidopsis 35S:FsPP2C1 plants suggest that FsPP2C1 negatively regulates ABA signaling. The ABA inducibility of FsPP2C1 expression, together with the transcript accumulation mainly in seeds, suggest that it could play an important role modulating ABA signaling in beechnuts through a negative feedback loop. Finally, we suggest that negative regulation of ABA signaling by FsPP2C1 is a factor contributing to promote the transition from seed dormancy to germination during early weeks of stratification

Temporal trends in respiratory care and bronchopulmonary dysplasia in very preterm infants over a 10-year period in Spain

[Abstract] Objective: To evaluate trends in respiratory care practices and bronchopulmonary dysplasia (BPD) among very preterm infants born in Spain between 2010 and 2019. Study design: This was a retrospective cohort study of data obtained from a national population-based database (SEN1500 network). Changes in respiratory care and BPD-free survival of infants with gestational age (GA) of 230-316 weeks and <1500 g were assessed over two 5-year periods. Temporal trends were examined by joinpoint and Poisson regression models and expressed as the annual per cent change and adjusted relative risk (RR) for the change per year. Results: A total of 17 952 infants were included. In the second period, infants were less frequently intubated in the delivery room and during neonatal intensive care unit stay. This corresponded with an increase in use of non-invasive ventilation techniques. There were no significant differences between the periods in BPD-free survival or survival without moderate-to-severe BPD. After adjusting for covariates, the RR for the change per year was significant for the following variables: never intubated (RR 1.03, 95% CI 1.02 to 1.04); intubation in the delivery room (RR 0.98, 95% CI 0.97 to 0.99); use of nasal intermittent positive pressure ventilation (RR 1.08, 95% CI 1.05 to 1.11); and BPD-free survival (only in the group with the lowest GA; RR 0.98, 95% CI 0.97 to 0.99). Conclusion: Our findings reveal significant changes in respiratory care practices between 2009 and 2019. Despite an increase in use of non-invasive respiratory strategies, BPD-free survival did not improve and even worsened in the group with the lowest GA (230-256)

Nasal intermittent positive pressure ventilation and bronchopulmonary dysplasia among very preterm infants never intubated during the first neonatal admission: a multicenter cohort study

[Abstract] Introduction: While non-invasive positive-pressure ventilation (NIPPV) is increasingly used as a mode of respiratory support for preterm infants, it remains unclear whether this technique translates into improved respiratory outcomes. We assessed the association between NIPPV use and bronchopulmonary dysplasia (BPD)-free survival in never intubated very preterm infants. Methods: This multicenter cohort study analyzed data from the Spanish Neonatal Network SEN1500 corresponding to preterm infants born at <32 weeks gestational age and <1,500 g and not intubated during first admission. The exposure of interest was use of NIPPV at any time and the main study outcome was survival without moderate-to-severe BPD. Analyses were performed both by patients and by units. Primary and secondary outcomes were compared using multilevel logistic-regression models. The standardized observed-to-expected (O/E) ratio was calculated to classify units by NIPPV utilization and outcome rates were compared among groups. Results: Of the 6,735 infants included, 1,776 (26.4%) received NIPPV during admission and 6,441 (95.6%) survived without moderate-to-severe BPD. After adjusting for confounding variables, NIPPV was not associated with survival without moderate-to-severe BPD (OR 0.84; 95%CI 0.62–1.14). A higher incidence of moderate-to-severe BPD-free survival was observed in high- vs. very low-utilization units, but no consistent association was observed between O/E ratio and either primary or secondary outcomes. Conclusion: NIPPV use did not appear to decisively influence the incidence of survival without moderate-to-severe BPD in patients managed exclusively with non-invasive ventilation

El papel de la reflexión metodológica y la actualidad de la observación-participante en la antropología contemporánea: Entrevista a Cecilia Hidalgo

En este artículo presentamos un trabajo realizado durante la cursada del primer cuatrimestre de 2017 en la materia Metodología y Técnicas de la Investigación de Campo, en el cual los y las estudiantes nos organizamos grupalmente en torno a temáticas específicas, que en nuestro caso fue Perspectivas Etnográficas en los estudios de la ciencia, la tecnología y la innovación. Abordajes etnográficos en campos disciplinares y multidisciplinares. Para llevar a cabo dicho trabajo, decidimos como equipo entrevistar a la Dra. Cecilia Hidalgo, referente conocida en nuestra casa de estudios por su orientación en la Antropología de la Ciencia. Este trabajo de reflexión fue luego revisado con la colaboración de docentes de la materia, y comentado por ellos a modo de conclusión, para así reflexionar sobre algunos aspectos de la enseñanza de la metodología, en este caso especialmente sobre la OP.Fil: Liebling, Tamara. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Pérez, Amalia Margarita. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Porsella, Rodrigo Martín. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Villahoz, Martina. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Perez Velilla, Alejandro. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Fontana, Dolores. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; ArgentinaFil: Padawer, Ana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Instituto de Ciencias Antropológicas; ArgentinaFil: Pico, Mercedes. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras. Departamento de Ciencias Antropológicas; Argentin

Brief Report: CYP27B1 rs10877012 T Allele Was Linked to Non-AIDS Progression in ART-Naïve HIV-Infected Patients: A Retrospective Study.

HIV/AIDS progression is linked to vitamin D, which is regulated by several key cytochromes P450 (CYP). Single nucleotide polymorphisms (SNPs) in CYP genes influence vitamin D metabolism and serum levels. The objective of this study was to evaluate the association between CYP SNPs and the clinical AIDS progression in antiretroviral treatment (ART)-naïve HIV-infected patients. We performed a retrospective study in 661 ART-naïve HIV-infected patients who were stratified by their AIDS progression pattern [181 long-term nonprogressors (LTNPs), 332 moderate progressors, and 148 rapid progressors (RPs)]. Four CYP SNPs (CYP2R1 rs10500804, CYP2R1 rs1993116, CYP27B1 rs10877012, and CYP24A1 rs6013897) were genotyped using Agena Bioscience's MassARRAY platform. Correction for multiple testing was performed using the false discovery rate (Benjamini-Hochberg procedure). The adjusted regression showed a significant association only for CYP27B1 rs10877012 SNP. When analyzing all HIV patients, the rs10877012 T allele was protective against AIDS progression (ordinal outcome) under the dominant [adjusted odds ratio (aOR) = 0.69; P = 0.021) and additive (aOR) = 0.75; P = 0.025] inheritance models. When analyzing LTNPs versus RPs, the rs10877012 T allele also showed a significant protective association under the dominant (aOR = 0.45; P = 0.004) and additive (aOR = 0.54; P = 0.008) inheritance models. P values remained significant after correcting by multiple comparisons only for the comparison of LTNPs versus RPs (extreme phenotypes). The CYP27B1 rs10877012 T allele was linked to non-AIDS progression in ART-naïve HIV-infected patients. The rs10877012 SNP seems to have an impact on the clinical AIDS progression, possibly modifying vitamin D levels, which could be relevant for the pathogenesis of HIV infection.This work has been (partially) funded by the RD16/0025/0019 and RD16CIII/0002/0002, projects as part of Acción Estratégica en Salud, Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica (2013-2016) and cofinanced by Instituto de Salud Carlos III (ISCIII-Subdirección General de Evaluación) and Fondo Europeo de Desarrollo Regional (FEDER), RETIC PT17/0015/0042, Fondo de Investigación Sanitaria (FIS) (grant number PI16/01863, PI17/01115, PI17CIII/00003), EPIICAL Project and Comunidad de Madrid (B2017/BMD-3703). CIBER-BBN is an initiative funded by the VINational R&D&i Plan 2008-2011, Iniciativa Ingenio 2010, the Consolider Program, and CIBER Actions and financed by ISCIII with assistance from the European Regional Development Fund. This work has been supported partially by a EUROPARTNER: Strengthening and spreading international partnership activities of the Faculty of Biology and Environmental Protection for interdisciplinary research and innovation of the University of Lodz Programme: NAWA International Academic Partnership Programme. This article/publication is based upon work from COST Action CA 17140 "Cancer Nanomedicine from the Bench to the Bedside" supported by COST (European Cooperation in Science and Technology). AFR and MAJS are supported by “Instituto de Salud Carlos III” [grant number CP14/0010and CP17CIII/00007, respectivelly].Programa de Investigación de la Consejería de Sanidad de la Comunidad de Madrid to JLJ.S

Estrategias metodológicas enfocadas a la mejora del aprendizaje en estudiantes con diversidad

Diseño y desarrollo de estrategias metodológicas que faciliten el aprendizaje de los estudiantes en general y que permitan a los estudiantes con diversidad funcional la integración y participación en el proceso de aprendizaje, que refuercen su inclusión y que favorezcan la adquisición de competencias

Ampliación y actualización de las prácticas del laboratorio de Instrumentación Biomédica buscando un aprendizaje y evaluación centrados en el estudiante

El objetivo del proyecto es el diseño de las prácticas de laboratorio para la asignatura Instrumentación Biomédica del Master de Física Biomédica. Se pretende mejorar el aprendizaje potenciando la participación activa y autonomía de los estudiantes. La falta de financiación económica se ha traducido en obtener como resultado del proyecto la redacción de guiones de prácticas que posibiliten el trabajo individual del alumno fuera del laboratorio dado el alto número de alumnos por puesto para llevar a cabo las prácticas. Estos guiones se han complementado con scripts en MatLab para analizar y procesar los datos obtenidos en el laboratorio así como datos obtenidos en diversas bases. Esta propuesta dió información sobre el progreso de los estudiantes en el aprendizaje cuando se utilizó el sistema de rúbricas tambien resultado de este proyecto