Efecto de la disponibilidad de recursos sobre la eficacia reproductiva de Juniperus thurifera

Documentos apresentados no âmbito do reconhecimento de graus e diplomas estrangeiro

Extensive analysis of native and non-native Centaurea solstitialis L. populations across the world shows no traces of polyploidization

Centaurea solstitialis L. (yellow starthistle, Asteraceae) is a Eurasian native plant introduced as an exotic into North and South America, and Australia, where it is regarded as a noxious invasive. Changes in ploidy level have been found to be responsible for numerous plant biological invasions, as they are involved in trait shifts critical to invasive success, like increased growth rate and biomass, longer life-span, or polycarpy. C. solstitialis had been reported to be diploid (2n = 2x = 16 chromosomes), however, actual data are scarce and sometimes contradictory. We determined for the first time the absolute nuclear DNA content by flow cytometry and estimated ploidy level in 52 natural populations of C. solstitialis across its native and non-native ranges, around the world. All the C. solstitialis populations screened were found to be homogeneously diploid (average 2C value of 1.72 pg, SD = ±0.06 pg), with no significant variation in DNA content between invasive and non-invasive genotypes. We did not find any meaningful difference among the extensive number of native and non-native C. solstitialis populations sampled around the globe, indicating that the species invasive success is not due to changes in genome size or ploidy level

Treatment with tocilizumab or corticosteroids for COVID-19 patients with hyperinflammatory state: a multicentre cohort study (SAM-COVID-19)

Objectives: The objective of this study was to estimate the association between tocilizumab or corticosteroids and the risk of intubation or death in patients with coronavirus disease 19 (COVID-19) with a hyperinflammatory state according to clinical and laboratory parameters. Methods: A cohort study was performed in 60 Spanish hospitals including 778 patients with COVID-19 and clinical and laboratory data indicative of a hyperinflammatory state. Treatment was mainly with tocilizumab, an intermediate-high dose of corticosteroids (IHDC), a pulse dose of corticosteroids (PDC), combination therapy, or no treatment. Primary outcome was intubation or death; follow-up was 21 days. Propensity score-adjusted estimations using Cox regression (logistic regression if needed) were calculated. Propensity scores were used as confounders, matching variables and for the inverse probability of treatment weights (IPTWs). Results: In all, 88, 117, 78 and 151 patients treated with tocilizumab, IHDC, PDC, and combination therapy, respectively, were compared with 344 untreated patients. The primary endpoint occurred in 10 (11.4%), 27 (23.1%), 12 (15.4%), 40 (25.6%) and 69 (21.1%), respectively. The IPTW-based hazard ratios (odds ratio for combination therapy) for the primary endpoint were 0.32 (95%CI 0.22-0.47; p < 0.001) for tocilizumab, 0.82 (0.71-1.30; p 0.82) for IHDC, 0.61 (0.43-0.86; p 0.006) for PDC, and 1.17 (0.86-1.58; p 0.30) for combination therapy. Other applications of the propensity score provided similar results, but were not significant for PDC. Tocilizumab was also associated with lower hazard of death alone in IPTW analysis (0.07; 0.02-0.17; p < 0.001). Conclusions: Tocilizumab might be useful in COVID-19 patients with a hyperinflammatory state and should be prioritized for randomized trials in this situatio

Mortality and pulmonary complications in patients undergoing surgery with perioperative SARS-CoV-2 infection: an international cohort study

Background: The impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on postoperative recovery needs to be understood to inform clinical decision making during and after the COVID-19 pandemic. This study reports 30-day mortality and pulmonary complication rates in patients with perioperative SARS-CoV-2 infection. Methods: This international, multicentre, cohort study at 235 hospitals in 24 countries included all patients undergoing surgery who had SARS-CoV-2 infection confirmed within 7 days before or 30 days after surgery. The primary outcome measure was 30-day postoperative mortality and was assessed in all enrolled patients. The main secondary outcome measure was pulmonary complications, defined as pneumonia, acute respiratory distress syndrome, or unexpected postoperative ventilation. Findings: This analysis includes 1128 patients who had surgery between Jan 1 and March 31, 2020, of whom 835 (74·0%) had emergency surgery and 280 (24·8%) had elective surgery. SARS-CoV-2 infection was confirmed preoperatively in 294 (26·1%) patients. 30-day mortality was 23·8% (268 of 1128). Pulmonary complications occurred in 577 (51·2%) of 1128 patients; 30-day mortality in these patients was 38·0% (219 of 577), accounting for 81·7% (219 of 268) of all deaths. In adjusted analyses, 30-day mortality was associated with male sex (odds ratio 1·75 [95% CI 1·28–2·40], p\textless0·0001), age 70 years or older versus younger than 70 years (2·30 [1·65–3·22], p\textless0·0001), American Society of Anesthesiologists grades 3–5 versus grades 1–2 (2·35 [1·57–3·53], p\textless0·0001), malignant versus benign or obstetric diagnosis (1·55 [1·01–2·39], p=0·046), emergency versus elective surgery (1·67 [1·06–2·63], p=0·026), and major versus minor surgery (1·52 [1·01–2·31], p=0·047). Interpretation: Postoperative pulmonary complications occur in half of patients with perioperative SARS-CoV-2 infection and are associated with high mortality. Thresholds for surgery during the COVID-19 pandemic should be higher than during normal practice, particularly in men aged 70 years and older. Consideration should be given for postponing non-urgent procedures and promoting non-operative treatment to delay or avoid the need for surgery. Funding: National Institute for Health Research (NIHR), Association of Coloproctology of Great Britain and Ireland, Bowel and Cancer Research, Bowel Disease Research Foundation, Association of Upper Gastrointestinal Surgeons, British Association of Surgical Oncology, British Gynaecological Cancer Society, European Society of Coloproctology, NIHR Academy, Sarcoma UK, Vascular Society for Great Britain and Ireland, and Yorkshire Cancer Research

TIC Y SISTEMAS INTELIGENTES como herramientas de soporte para el manejo, educación y prevención del trauma

La corporación ecuatoriana para el desarrollo de la investigación y la academia,. CEDIA, promueve la exploración y resultados de proyectos innovadores que vinculan a instituciones ecuatorianas. A inicios del año 2014, CEDIA conformó grupos de trabajo en varias áreas d einterés; una de ellas fue Telemedicina y Telesalud debido al gran impacto que tiene dentro de la investigación. Este grupo cuenta con la participación de seis universidades ecuatorianas: Universidad de Cuenca, Universidad Salesiana, Universidad Católica de Cuenca, Universidad del Azuay, Universidad Regional Autónoma de los Andes y Universidad Nacional de Chimborazo. El objetivo de este grupo de trabajo es fortalecer, impulsar y motivar actividades de investigación entre las instituciones miembros de CEDIA en bienestar d ela comunidad. En este libro se visualiza el trabajo realizado por el Grupo de Trabajo en temas de trauma utilizando múltiples formas de tecnología, desde aplicaciones móviles, e-learning, objetos de aprendizaje, hasta sistemas de recolección automatizada de datos; desarrollando programas que impactan en la atención de la salud en el área pre-hospitalaria, prevención de lesiones, registro de trauma, modalidades de educación y aprendizaje, mediante el uso de las TIC

GEODIVULGAR: Geología y Sociedad

Fac. de Ciencias GeológicasFALSEsubmitte

Juniperus thurifera: a dioecious, masting, relictual tree

La dioecia es un factor extremadamente significativo a lo largo de toda la historia vital de J. thurifera. Machos y hembras modifican el ambiente de forma diferencial, generando dinámicas poblacionales y estructuras espaciales determinadas por el sexo. Además, la diferencia en costos reproductivos de ambos sexos presenta una interesante interacción cuando se estudia el efecto en la variación en la disponibilidad de recursos, ya que modifica la eficacia reproductiva de machos y hembras de forma diferente: los machos suelen distribuir los recursos adicionales entre diversas funciones biológicas, utilizando los recursos disponibles de forma más o menos inmediata; por su parte las hembras almacenan la mayor parte de esos recursos, demostrando tener una estrategia a largo plazo que les permite optimizar el compromiso entre la eficacia reproductiva presente y la supervivencia futura. Machos y hembras presentan diferentes compromisos de inversión de recursos, estrategias fisiológicas y funcionales bien diferenciadas para ambos sexos e incluso diferencias entre los ciclos reproductivos de ambos sexos, lo que genera un "desacoplamiento en la vecería" entre machos y hembras. Las hembras controlan el éxito del proceso reproductivo y son, por tanto, de importancia crítica frente a los cambios ambientales naturales o inducidos por la actividad humana, que reducirían paulatinamente su fertilidad induciendo un declive que en el largo plazo podría comprometer la regeneración de sus poblaciones.Dioecy is an extremely significant character along the life history of J. thurifera. Male and female trees modify their surrounding environment differently, creating population dynamics and spatial structures determined by sex of adult trees. Besides, reproductive costs between sexes present an interesting interaction when the effect of the variation in resource availability is studied, since it affects reproductive strategies of males and females differently: males split additional resources between diverse biological functions, using their resources immediately; on the other hand females store most of the additional resources, in a long term strategy which allows the optimization of the compromise between present reproduction and future survival. Male and female trees present different trade-offs, physiological and functional strategies and even differences between their reproductive cycles, generating "masting uncoupling" between males and females. Female trees control the success of the reproductive process and any decline in females’ fertility will compromise the regeneration of its populations in the long term. Their response to environmental changes induced by human activity is therefore critical

La educación bilingüe en Andalucía : análisis, experiencias y propuestas

Resumen basado en el de la publicaciónUn auténtico progreso de la educación bilingüe en Andalucía precisa, junto al empeño y al impulso institucional, un compromiso genuino de reflexión, de análisis, de investigación y de evaluación, así como la divulgación de experiencias válidas y de buenas prácticas. Se reflexiona sobre el estado de la cuestión de la enseñanza bilingüe, se elaboran propuestas de mejora (particularmente referidas a la formación del profesorado), y se difunden iniciativas de y para la educación bilingüe adecuadas y fundamentadas, llevadas a cabo por profesores de Andalucía en distintos niveles y contextos de enseñanza.AndalucíaBiblioteca de Educación del Ministerio de Educación, Cultura y Deporte; Calle San Agustín 5 -3 Planta; 28014 Madrid; Tel. +34917748000; [email protected]