32 research outputs found

    Cartography of Homogeneous Environmental Units in Salta: Input for ordering the Chaco forests

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    En la provincia de Salta, la Ley 7543 de Ordenamiento Territorial del Bosque Nativo zonificó el territorio al norte del río Bermejo dentro de las categorías I y II, esta última destinada al aprovechamiento forestal y a sistemas silvopastoriles (SSP) o a ganadería bajo monte. Las tecnologías para implantar pasturas en SSP se adecuan a la Ley y se están implementando exitosamente en sitios con bosque alto en suelos de fuerte desarrollo, pero no en arbustales con baja cobertura vegetal, donde se pierden rápidamente. El objetivo de este trabajo es elaborar cartografía de las Unidades Ambientales Homogéneas (UAH) que cubren el Sitio Piloto Chaco Semiárido (SPChSA) de la red del Observatorio Nacional de Degradación de Tierras y Desertificación (ONDTyD), agrupadas por criterios de vegetación y suelos como insumo para el ordenamiento del uso del territorio. Mediante un sistema de información geográfica (SIG) y muestreos de suelos y vegetación se efectuó una clasificación supervisada que arrojó seis UAH. Se elaboró cartografía temática del sitio piloto en la que se muestra, a escala de semidetalle, la distribución de las UAH y la superficie que ocupa cada UAH. Se encontró que 30% del área Categoría II está cubierta con arbustales que no poseen aptitud para mantener SSP sostenibles en el largo plazo, pero que fueron descritos como valiosos para el funcionamiento del ecosistema. Esto constituye un alerta sobre la necesidad de mapear de forma apropiada las áreas que deben ser resguardadas en la zonificación vigente, a fin de no profundizar procesos de degradación en el territorio.The north of the Bermejo River, territory of Salta province, was zoned as categories I and II, according to the Law 7543 of Native Forest Territorial Planning. The Category II allows forest use or raising ca�le under forests. The technologies involved in implanting pastures under silvopastoral systems meet the requirements of the Law and are being successfully implemented in sites with high forest and developed soils, but not in shrubland with low vegetation cover, where they quickly disappear. The aim of this work is to elaborate cartography of the Homogeneous Environmental Units (HEU) covering Semiarid Chaco Pilot Site (SPChSA) of the National Observatory of Land Degradation and Desertification (ONDTyD), grouped by criteria of vegetation and soils, as input for land use planning. A supervised classification of the study area was carried out using geographic information system (GIS) and sampling soil and vegetation. Six EHU were identified. Thematic mapping of the pilot site was prepared, and the area occupied by each unit was calculated as a contribution to current environmental legislation. It is reported that 30% of Category II is covered with shrublands that do not have the ability to maintain sustainable SSP in the long term, but are valuable for the functioning of the ecosystem. This is a warning of the need to properly map the areas that should be protected in the current zoning to avoid further degradation processes in the territory.Fil: Camardelli, María Cristina. Universidad Nacional de Salta. Facultad de Ciencias Naturales; ArgentinaFil: Miranda, Santiago Rubén. Universidad Nacional de Salta. Facultad de Ciencias Naturales; ArgentinaFil: Córdoba, Gisela Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; Argentin

    Acercamiento al mundo laboral de la nueva Generación Z de estudiantes del Máster en Ingeniería Química mediante aprendizaje basado en retos y mentorías en el marco del desarrollo sostenible

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    Esta metodología (ABR) que se ha empleado en la parte teórica de la asignatura “Estancias en empresas y centros de investigación” del máster en Ingeniería Química: Ingeniería de Procesos en la UCM. La metodología implica el establecimiento de un panel de expertos, la definición de los retos a resolver, la configuración de los grupos de trabajo, la realización de distintas actividades para resolver el reto, y la exposición pública del mismo. La evaluación de la metodología se realizó mediante una encuesta a los alumnos cuyas conclusiones más relevantes son que, a pesar de que consideraban que era necesario mucho esfuerzo, los estudiantes pensaban que la metodología era interesante. Entre las actividades llevadas a cabo, las visitas a plantas industriales fueron las más valoradas, mientras que la preparación de un CV resultó la menos atractiva para los estudiantesDepto. de Ingeniería Química y de MaterialesFac. de Ciencias QuímicasFALSEsubmitte

    Modelling the spatial risk of malaria through probability distribution of Anopheles maculipennis s.l. and imported cases

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    Malaria remains one of the most important infectious diseases globally due to its high incidence and mortality rates. The influx of infected cases from endemic to non-endemic malaria regions like Europe has resulted in a public health concern over sporadic local outbreaks. This is facilitated by the continued presence of competent Anopheles vectors in non-endemic countries. We modelled the potential distribution of the main malaria vector across Spain using the ensemble of eight modelling techniques based on environmental parameters and the Anopheles maculipennis s.l. presence/absence data collected from 2000 to 2020. We then combined this map with the number of imported malaria cases in each municipality to detect the geographic hot spots with a higher risk of local malaria transmission. The malaria vector occurred preferentially in irrigated lands characterized by warm climate conditions and moderate annual precipitation. Some areas surrounding irrigated lands in northern Spain (e.g. Zaragoza, Logroño), mainland areas (e.g. Madrid, Toledo) and in the South (e.g. Huelva), presented a significant likelihood of A. maculipennis s.l. occurrence, with a large overlap with the presence of imported cases of malaria. While the risk of malaria re-emergence in Spain is low, it is not evenly distributed throughout the country. The four recorded local cases of mosquito-borne transmission occurred in areas with a high overlap of imported cases and mosquito presence. Integrating mosquito distribution with human incidence cases provides an effective tool for the quantification of large-scale geographic variation in transmission risk and pinpointing priority areas for targeted surveillance and prevention

    Impact of Biological Agents on Postsurgical Complications in Inflammatory Bowel Disease : A Multicentre Study of Geteccu

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    Background: The impact of biologics on the risk of postoperative complications (PC) in inflammatory bowel disease (IBD) is still an ongoing debate. This lack of evidence is more relevant for ustekinumab and vedolizumab. Aims: To evaluate the impact of biologics on the risk of PC. Methods: A retrospective study was performed in 37 centres. Patients treated with biologics within 12 weeks before surgery were considered "exposed". The impact of the exposure on the risk of 30-day PC and the risk of infections was assessed by logistic regression and propensity score-matched analysis. Results: A total of 1535 surgeries were performed on 1370 patients. Of them, 711 surgeries were conducted in the exposed cohort (584 anti-TNF, 58 vedolizumab and 69 ustekinumab). In the multivariate analysis, male gender (OR: 1.5; 95% CI: 1.2-2.0), urgent surgery (OR: 1.6; 95% CI: 1.2-2.2), laparotomy approach (OR: 1.5; 95% CI: 1.1-1.9) and severe anaemia (OR: 1.8; 95% CI: 1.3-2.6) had higher risk of PC, while academic hospitals had significantly lower risk. Exposure to biologics (either anti-TNF, vedolizumab or ustekinumab) did not increase the risk of PC (OR: 1.2; 95% CI: 0.97-1.58), although it could be a risk factor for postoperative infections (OR 1.5; 95% CI: 1.03-2.27). Conclusions: Preoperative administration of biologics does not seem to be a risk factor for overall PC, although it may be so for postoperative infections

    Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

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    The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality
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