Ensayo sobre la vegetación rupícola basófila de la clase Aslenietea trichornanis en la provincia corológica bética

Se hace un estudio y recopilación de las comunidades vegetales rupícolas basófilas de la provincia corológica Bética. En este contexto, se proponen algunas combinaciones y sinonimias y se describe la alianza Campano/ion relutinae y las asociaciones Teucrio- Linarietum lilacinue, Saxifragetum camposii y Anthyllido-Arenarietum alfacarensis.The rupicolous calcicoles communities of the Betica biogeographical province have been studied and compiled. Some combinations and synonymy are proposed and the alliance Campanulion velutinae and the associations Teucrio-Linarietum lilacinue, Saxifragetum composh and Anthyllido-Arenarietum ahracarensis are also described

Nursing students in Saharan refugee camps: Expectations and options of professional future from a qualitative perspective

Artículo como resultado del proyecto de cooperación internacional para el desarrollo “Contribución a la mejora de la calidad de vida de la población de los campamentos de refugiados/as saharauis” financiado por la Agencia Andaluza de Cooperación Internacional para el Desarrollo de la Junta de Andalucía, Spain (Reference: 2014DEC/008).Aim: The aim of this study was to explore and understand the perceptions of the expectations of the professional future of nursing students who study in Saharan refugee camps. Background: Part of the Saharan population live in refugee camps with a precarious healthcare system, which depends on nursing professionals who are trained in the only nursing school in the world that exists inside a refugee camp. Design: An interpretive qualitative research methodology using Gadamer’s philosophical hermeneutics. Methods: A qualitative study with nursing students (n = 14) of different years from the nursing school in a Saharan refugee camp (Algeria) in 2021. Focus groups recorded in audio for subsequent transcription and analysis by two researchers through Fleming´s stages. Results: Three themes were identified as important aspects of the personal and professional expectations perceived by this population group: (1) studying nursing as a moral obligation; (2) Culture as a determinant for dropping out of school; and (3) aspirations for a professional future in the Saharan refugee camps. The participants highlighted the role of social and cultural aspects to complete their studies and develop a professional career. Conclusions: These Saharan nursing students can study a nursing speciality or work in healthcare. However, they struggle to choose between the moral obligation of doing so and the social and cultural factors that lead some of them to abandon their studies. Tweetable abstract: The possibility of studying for a career and the professional future of Saharan nursing studies are conditioned by the environment, culture and the socio-economic situation. Their work is especially important in the refugee camps where they live.Universidad de GranadaAndalusian Agency for International Development Cooperation of the Junta de Andalucía, Spain (Reference: 2014DEC/008

A new alternative for obtaining nanocrystalline bioactive coatings: study of hydroxyapatite deposition mechanisms by cold gas praying

The present article is intended to study the deposition mechanisms of bioactive hydroxyapatite (HA) particles by means of Cold Gas Spraying (CGS). A comparison of the deposition on two different substrates (Ti6Al4V and Al7075T6) and different particle sizes is presented. Although this is a more specific deposition technique for ductile materials, it is here shown that, in certain conditions, ceramic deposition is possible despite the inherent low ductility. The resulting internal structure and the features at the particle-substrate interface are discussed in view of Transmission Electron Microscopy examinations of a Focused Ion Beam lift-out prepared sample. Mainly, under shock compressive loading, the porous sintered powder proceeds through pore collapse, fragmentation and densification as well as grain refinement. The process is described through different plastic mechanisms in ceramics. This opens a new alternative route to produce nanocrystalline HA coatings through a cost-effective proces

Dense nanostructured calcium phosphate coating on titanium by cold spray

This article deals with the understanding of building-up mechanisms of bioactive nanocrystalline hydroxyapatite coatings by Cold Spray, revealing very promising results in contrast to more conventional techniques such as Plasma Spray. A full characterization of feedstock and coatings is provided. The agglomerated structure of the powder proved to be suitable to obtain successfully thick hydroxyapatite coatings. A crystallite size below similar to 20 nm in the powder and the as-sprayed coatings is calculated by the Rietveld X-ray refinement method and agreed by Transmission Electron Microscopy. Some wipe tests were carried out on Ti6Al4V substrates in order to study the deposition of single particles and the nanoscale features were evaluated. The resulting structure indicates that there is no delimitation of particle boundaries and the overall coating has been formed by effective compaction of the original nanocrystallites, leading to consistent and consolidated layers

SrMnO3 thermochromic behavior governed by size-dependent structural distortions

The influence of particle size in both the structure and thermochromic behavior of 4H-SrMnO related perovskite is described. Microsized SrMnO suffers a structural transition from hexagonal (P6/mmc) to orthorhombic (C222) symmetry at temperature close to 340 K. The orthorhombic distortion is due to the tilting of the corner-sharing MnO units building the 4H structural type. When temperature decreases, the distortion becomes sharper reaching its maximal degree at ∼125 K. These structural changes promote the modification of the electronic structure of orthorhombic SrMnO phase originating the observed color change. nano-SrMnO adopts the ideal 4H hexagonal structure at room temperature, the orthorhombic distortion being only detected at temperature below 170 K. A decrease in the orthorhombic distortion degree, compared to that observed in the microsample, may be the reason why a color change is not observed at low temperature (77 K)

Claves diagnósticas y terapéuticas para el manejo de la hemorragia digestiva alta no varicosa

La hemorragia digestiva alta tiene su origen en una lesión situada entre el esfínter esofágico superior y el ángulo de Treitz. Las causas más frecuentes son la úlcera péptica y la hipertensión portal. El diagnóstico de este síndrome se basa en la anamnesis, exploración física, los datos de laboratorio y la endoscopia oral. Se discute cada uno de ellos, resaltando la importancia de la endoscopia. El tratamiento inmediato en urgencias incluye algunas medidas generales del paciente en shock y medidas hemostáticas especiales. Una vez estabilizado el enfermo hay que administrar el tratamiento farmacológico específico en la hemorragia no varicosa.  PALABRAS CLAVE: Diagnóstico. Tratamiento. Hemorragia digestiva alta

Competencia digital, alfabetización mediática y formación del profesorado: vinculación de la teoría y la práctica a través de la colaboración inter-nivelar

Depto. de Estudios EducativosFac. de EducaciónFALSEsubmitte

The evolution of the ventilatory ratio is a prognostic factor in mechanically ventilated COVID-19 ARDS patients

Background: Mortality due to COVID-19 is high, especially in patients requiring mechanical ventilation. The purpose of the study is to investigate associations between mortality and variables measured during the first three days of mechanical ventilation in patients with COVID-19 intubated at ICU admission. Methods: Multicenter, observational, cohort study includes consecutive patients with COVID-19 admitted to 44 Spanish ICUs between February 25 and July 31, 2020, who required intubation at ICU admission and mechanical ventilation for more than three days. We collected demographic and clinical data prior to admission; information about clinical evolution at days 1 and 3 of mechanical ventilation; and outcomes. Results: Of the 2,095 patients with COVID-19 admitted to the ICU, 1,118 (53.3%) were intubated at day 1 and remained under mechanical ventilation at day three. From days 1 to 3, PaO2/FiO2 increased from 115.6 [80.0-171.2] to 180.0 [135.4-227.9] mmHg and the ventilatory ratio from 1.73 [1.33-2.25] to 1.96 [1.61-2.40]. In-hospital mortality was 38.7%. A higher increase between ICU admission and day 3 in the ventilatory ratio (OR 1.04 [CI 1.01-1.07], p = 0.030) and creatinine levels (OR 1.05 [CI 1.01-1.09], p = 0.005) and a lower increase in platelet counts (OR 0.96 [CI 0.93-1.00], p = 0.037) were independently associated with a higher risk of death. No association between mortality and the PaO2/FiO2 variation was observed (OR 0.99 [CI 0.95 to 1.02], p = 0.47). Conclusions: Higher ventilatory ratio and its increase at day 3 is associated with mortality in patients with COVID-19 receiving mechanical ventilation at ICU admission. No association was found in the PaO2/FiO2 variation