Suchergebnisse

Ante el Covid-19 el mundo adoptó medidas como el uso de mascarillas para evitar el contagio, producto desechable que generó gran presión sobre la recolección de los servicios municipales y de las instituciones con protocolos de bioseguridad para la protección de sus colaboradores, como la Bluefields Indian & Caribbean University (BICU) y las alcaldías de Bluefields, El Rama, Bilwi y Bonanza, donde esta universidad tiene extensiones. Objetivos del estudio: tipificar los residuos sólidos derivados de estrategias de protección frente a la pandemia; valorar las medidas de protección empleadas en los niveles evaluados (municipal y gestión universitaria) y proponer un plan de acción para la reducción de riesgos biológicos y manejo de residuos sólidos, como agentes diseminadores del covid-19. La metodología contempló la caracterización de los residuos in situ de los puntos de recolección y disposición final; se evaluaron los protocolos de bioseguridad y disponibilidad de los equipos de protección personal de los operarios en el proceso. Entre los resultados se destacan: la necesidad de la creación de un plan de gestión de residuos como herramienta para la minimización de riesgos de contagio al coronavirus para cuatro municipalidades y la validación de estrategias. Igualmente, se identificó la cohabitación de personas, incluyendo niños, en los rellenos sanitarios, siendo un detonante para proliferación de enfermedades del tipo zoonótico, las entidades de gobiernos locales, regionales y nacionales en alianza con las universidades deben generar estrategias para la reducción de los riesgos identificados.

Cuyo y Chile central constituyen, desde el siglo XVIII hasta hoy, el principal polo vitivinícola de América Latina y uno de los con mayor desarrollo del mundo. Su producción de vinos y aguardientes ha tenido fuertes implicancias sociales, económicas, políticas y culturales en la región. En la base de este proceso se encuentra el cultivo de la vid, trabajo agrícola intensivo y especializado, en el cual los vidueños tienen una relevancia central. Este artículo examina las variedades cultivadas en la región a partir de documentos originales inéditos, sobre todo de fondos notariales y judiciales de archivos de Santiago, Mendoza y San Juan. Sobre esta base se conformó un corpus documental de 3,5 millones de plantas, con vistas a identificar el proceso de ingreso, adaptación y propagación de las variedades de vid, desde la llegada de los españoles hasta el ingreso de las cepas francesas a mediados del siglo XIX. Particular atención se presta al inicio de la coexistencia entre la uva País y la uva de Italia (moscatel de Alejandría), situación que generó las condiciones para el surgimiento del torrontés, única variedad criolla de alto valor enológico y actual cepa emblemática de los vinos blancos argentinos. ; From the eighteenth century until today Cuyo and central Chile have been the main viticulture centers in Latin America and one of the most developed in the world. Their wine and spirits making have had important social, economic, politic and cultural implications in the region. Behind this, there has been viticulture, intensive and specialized farm-working, and viticulturists, who have had key roles. This article, based on originals and unpublished documents from Santiago, Mendoza, and San Juan notaries and court archives, examines varieties cultivated in the region. At the end, a document corpus was generated with 3.5 million plants in order to identify time of entry, adaptation, and propagation of grape varieties from Spanish colonization until French strains entered the region during mid nineteenth century. In particular, coexistence of Pais grape and Italia grape (muscat of Alexandria) is examined, which had direct influence over the appearance of the Torrontes variety. The latest is the only high value wine-making Creole variety that prevails until today and is the most important in white-wine-making in Argentina. ; Centro de Estudios Históricos Rurales

The rare earth elements (REE) along with iron and manganese distribution in ochre-precipitates and wetland soils in a passive system for acid mine drainage treatment (Jales, Portugal) was studied. The results obtained by instrumental neutron activation analysis showed a higher incorporation of the light REE (particularly La and Ce) by the ochre-precipitates resulting from the mine water-limestone interaction. These fluffy materials influence the entrance of the first wetland where a correlation between Fe and La and Ce was found. Then Mn phases appear to play a more important role controlling REE distribution in the remaining area of the wetland soils. ; Thanks to EDM (Empresa de Desenvolvimento Mineiro, S.A.) for providing access to the water treatment plant, and to the staff of the Portuguese Research Reactor (RPI) of CTN/IST. C2TN authors gratefully acknowledge the FCT (the Portuguese Science and Technology Foundation) support through the UID/Multi/04349/2013. This work is co-funded by European Union through the European Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), project ICT (UID/GEO/04683/2013) with reference POCI-01-0145-FEDER-007690 and national funds provided by FCT. ...

Cuyo y Chile central constituyen, desde el siglo XVIII hasta hoy, el principal polo vitivinícola de América Latina y uno de los con mayor desarrollo del mundo. Su producción de vinos y aguardientes ha tenido fuertes implicancias sociales, económicas, políticas y culturales en la región. En la base de este proceso se encuentra el cultivo de la vid, trabajo agrícola intensivo y especializado, en el cual los vidueños tienen una relevancia central. Este artículo examina las variedades cultivadas en la región a partir de documentos originales inéditos, sobre todo de fondos notariales y judiciales de archivos de Santiago, Mendoza y San Juan. Sobre esta base se conformó un corpus documental de 3,5 millones de plantas, con vistas a identificar el proceso de ingreso, adaptación y propagación de las variedades de vid, desde la llegada de los españoles hasta el ingreso de las cepas francesas a mediados del siglo XIX. Particular atención se presta al inicio de la coexistencia entre la uva País y la uva de Italia (moscatel de Alejandría), situación que generó las condiciones para el surgimiento del torrontés, única variedad criolla de alto valor enológico y actual cepa emblemática de los vinos blancos argentinos ; From the eighteenth century until today Cuyo and central Chile have been the main viticulture centers in Latin America and one of the most developed in the world. Their wine and spirits making have had important social, economic, politic and cultural implications in the region. Behind this, there has been viticulture, intensive and specialized farm-working, and viticulturists, who have had key roles. This article, based on originals and unpublished documents from Santiago, Mendoza, and San Juan notaries and court archives, examines varieties cultivated in the region. At the end, a document corpus was generated with 3.5 million plants in order to identify time of entry, adaptation, and propagation of grape varieties from Spanish colonization until French strains entered the region during mid nineteenth century. In particular, coexistence of Pais grape and Italia grape (muscat of Alexandria) is examined, which had direct influence over the appearance of the Torrontes variety. The latest is the only high value wine-making Creole variety that prevails until today and is the most important in white-wine-making in Argentina.

Cuyo y Chile central constituyen, desde el siglo XVIII hasta hoy, el principal polo vitivinícola de América Latina y uno de los con mayor desarrollo del mundo. Su producción de vinos y aguardientes ha tenido fuertes implicancias sociales, económicas, políticas y culturales en la región. En la base de este proceso se encuentra el cultivo de la vid, trabajo agrícola intensivo y especializado, en el cual los vidueños tienen una relevancia central. Este artículo examina las variedades cultivadas en la región a partir de documentos originales inéditos, sobre todo de fondos notariales y judiciales de archivos de Santiago, Mendoza y San Juan. Sobre esta base se conformó un corpus documental de 3,5 millones de plantas, con vistas a identificar el proceso de ingreso, adaptación y propagación de las variedades de vid, desde la llegada de los españoles hasta el ingreso de las cepas francesas a mediados del siglo XIX. Particular atención se presta al inicio de la coexistencia entre la uva País y la uva de Italia (moscatel de Alejandría), situación que generó las condiciones para el surgimiento del torrontés, única variedad criolla de alto valor enológico y actual cepa emblemática de los vinos blancos argentinos ; From the eighteenth century until today Cuyo and central Chile have been the main viticulture centers in Latin America and one of the most developed in the world. Their wine and spirits making have had important social, economic, politic and cultural implications in the region. Behind this, there has been viticulture, intensive and specialized farm-working, and viticulturists, who have had key roles. This article, based on originals and unpublished documents from Santiago, Mendoza, and San Juan notaries and court archives, examines varieties cultivated in the region. At the end, a document corpus was generated with 3.5 million plants in order to identify time of entry, adaptation, and propagation of grape varieties from Spanish colonization until French strains entered the region during mid nineteenth century. In particular, coexistence of Pais grape and Italia grape (muscat of Alexandria) is examined, which had direct influence over the appearance of the Torrontes variety. The latest is the only high value wine-making Creole variety that prevails until today and is the most important in white-wine-making in Argentina.

Cuyo y Chile central constituyen, desde el siglo XVIII hasta hoy, el principal polo vitivinícola de América Latina y uno de los con mayor desarrollo del mundo. Su producción de vinos y aguardientes ha tenido fuertes implicancias sociales, económicas, políticas y culturales en la región. En la base de este proceso se encuentra el cultivo de la vid, trabajo agrícola intensivo y especializado, en el cual los vidueños tienen una relevancia central. Este artículo examina las variedades cultivadas en la región a partir de documentos originales inéditos, sobre todo de fondos notariales y judiciales de archivos de Santiago, Mendoza y San Juan. Sobre esta base se conformó un corpus documental de 3,5 millones de plantas, con vistas a identificar el proceso de ingreso, adaptación y propagación de las variedades de vid, desde la llegada de los españoles hasta el ingreso de las cepas francesas a mediados del siglo XIX. Particular atención se presta al inicio de la coexistencia entre la uva País y la uva de Italia (moscatel de Alejandría), situación que generó las condiciones para el surgimiento del torrontés, única variedad criolla de alto valor enológico y actual cepa emblemática de los vinos blancos argentinos ; From the eighteenth century until today Cuyo and central Chile have been the main viticulture centers in Latin America and one of the most developed in the world. Their wine and spirits making have had important social, economic, politic and cultural implications in the region. Behind this, there has been viticulture, intensive and specialized farm-working, and viticulturists, who have had key roles. This article, based on originals and unpublished documents from Santiago, Mendoza, and San Juan notaries and court archives, examines varieties cultivated in the region. At the end, a document corpus was generated with 3.5 million plants in order to identify time of entry, adaptation, and propagation of grape varieties from Spanish colonization until French strains entered the region during mid nineteenth century. In particular, coexistence of Pais grape and Italia grape (muscat of Alexandria) is examined, which had direct influence over the appearance of the Torrontes variety. The latest is the only high value wine-making Creole variety that prevails until today and is the most important in white-wine-making in Argentina.

From the eighteenth century until today Cuyo and central Chile have been the main viticulture centers in Latin America and one of the most developed in the world. Their wine and spirits making have had important social, economic, politic and cultural implications in the region. Behind this, there has been viticulture, intensive and specialized farm-working, and viticulturists, who have had key roles. This article, based on originals and unpublished documents from Santiago, Mendoza, and San Juan notaries and court archives, examines varieties cultivated in the region. At the end, a document corpus was generated with 3.5 million plants in order to identify time of entry, adaptation, and propagation of grape varieties from Spanish colonization until French strains entered the region during mid nineteenth century. In particular, coexistence of Pais grape and Italia grape (muscat of Alexandria) is examined, which had direct influence over the appearance of the Torrontes variety. The latest is the only high value wine-making Creole variety that prevails until today and is the most important in white-wine-making in Argentina. ; Cuyo y Chile central constituyen, desde el siglo XVIII hasta hoy, el principal polo vitiviní­cola de América Latina y uno de los con mayor desarrollo del mundo. Su producción de vinos y aguardientes ha tenido fuertes implicancias sociales, económicas, polí­ticas y culturales en la región. En la base de este proceso se encuentra el cultivo de la vid, trabajo agrí­cola intensivo y especializado, en el cual los vidueños tienen una relevancia central. Este artí­culo examina las variedades cultivadas en la región a partir de documentos originales inéditos, sobre todo de fondos notariales y judiciales de archivos de Santiago, Mendoza y San Juan. Sobre esta base se conformó un corpus documental de 3,5 millones de plantas, con vistas a identificar el proceso de ingreso, adaptación y propagación de las variedades de vid, desde la llegada de los españoles hasta el ingreso de las cepas francesas a mediados ...

The main objectives of the present study were to (i) investigate the effects of mineralogy and solid-phase distribution on element bioaccessibility and (ii) perform a risk assessment to calculate the risks to human health via the ingestion pathway. Multiple discriminant analysis showed that the dust chemistry discriminates between indoor and outdoor samples. The solid-phase distribution of the elements in indoor dust indicated that a large proportion of zinc, nickel, lead, copper, and cobalt is associated with an aluminum oxy-hydroxides component, formed by the weathering of aluminum silicates. This component, which seems to influence the mobility of many trace elements, was identified for a group of indoor dust samples that probably had a considerable contribution from outdoor dust. An iron oxide component consisted of the highest percentage of chromium, arsenic, antimony, and tin, indicating low mobility for these elements. The bioaccessible fraction in the stomach phase from the unified BARGE method was generally high in zinc, cadmium, and lead and low in nickel, cobalt, copper, chromium, and antimony. Unlike other potentially toxic elements, copper and nickel associated with aluminum oxy-hydroxides and calcium carbonates were not extracted by the stomach solutions. These trace elements possibly form stable complexes with gastric fluid constituents such as pepsin and amino acid. Lead had a hazard quotient >1, which indicates the risk of non-carcinogenic health effects, especially for children. ; This research was by funded the LabexDRIIHM,Frenchprogramme"Investissementsd'Avenir"(ANR‐11‐LABX‐0010) which is managed by the ANR, and co‐funded by the European Union through the European Regional Development Fund, based on COMPETE 2020 (Programa Operacional da Competitividade e Internacionalização), projects ICT UIDB/04683/2020 and UIDP/04683/2020, project GeoBioTec (UID/GEO/04035/2019) and national funds provided by the FCT ‐ Fundação para a Ciência e a ...

Mineral-water interaction in mine drainage often results in the formation of iron-rich precipitates, called ochre products. They often comprise particles in the nanoscale, known by their strong reactivity. The present study focuses on these nanoprecipitates formed in streams that receive water from a U-Ra mine. Water and the ochre-precipitates that cover the streambed were sampled for geochemical and mineralogical characterization. Results indicate low crystallinity and variety of morphology of the ochre product, which is mainly composed by ferrihydrite in coexistence with minor hematite. The work concludes by noting the potential relevance of these nanophases in fate and transport of elements that pose major environmental concern, namely in uranium-rich mine waters. ; This work was co-funded by the European Union through the European Regional Development Fund, based on COMPETE 2020 - project ICT (UID/GEO/04683/2013) with reference POCI-01-0145- FEDER-007690 and project Nano-MINENV number 029259. The authors are grateful to the suggestions of the ...

The geochemical evolution of acid mine drainage results in secondary minerals that play a key role in the environmental behavior of the mine wastes. The present work is focused on these newly formed minerals at the Penedono waste dump, characterized by fine-grained tails with pyrite and arsenopyrite. Mineralogical study led to an inventory of secondary phases, comprising soluble sulfates, scorodite, and oxyhydroxysulfates. In addition, there is amorphous Fe, As rich-nanoprecipitates. Jarosite and scorodite are abundant minerals, acting as cement for encrusting tails in Fe and As-rich hardpans. These hard structures are relatively insoluble, retaining toxic elements, thereby contributing to natural attenuation of mining contamination associated with the sulphide wastes. ; European Union through the European Regional Development Fund, based on COMPETE 2020 - project ICT (UID/GEO/04683/2013) with reference POCI-01-0145- FEDER-007690 and project Nano-MINENV number ...

The objective of this study was to evaluate the influence of ration energy levels on the performance and carcass characteristics of confined lambs. Four energy levels were evaluated: 2.00; 2.28; 2.54, and 2.80 Mcal of ME kg-1DM, with the last content being recommended by the National Research Council [NRC] (2007) for daily weight gains of 300 g. Twenty-four crossbred Ile de France ram lambs (six per treatment) at 240.0 ± 9.6 days of age and 26.6 ± 3.8 kg body weight, fed with isoprotein diets (158 g kg-1, CP) were used. The confinement lasted 57 days. Final body weight, cold carcass weight, and cold carcass yield were linearly and positively influenced by diet energy content. Food intake, average daily weight gain, and feed conversion were quadratically influenced by energy level, where the highest averages were observed under diets containing between 2.54 and 2.80 Mcal. In percentage terms, the main carcass cuts (leg and shoulder) were not influenced by diet energy level. In terms of the shoulder tissue composition, it was observed that bone content decreased linearly, fat content increased quadratically, and muscle content was not affected by the energy content of the diet. It was concluded that diets with higher energy densities lead to the production of heavier carcasses with higher yields, as well as increased weight gains. Optimal diets should therefore contain between 2.54 and 2.80 Mcal of ME kg-1DM.