5,318 research outputs found
Hydrocarbon levels in sediments and bivalve mollusks from Bahía Nueva (Patagonia, Argentina): An assessment of probable origin and bioaccumulation factors
No full textEffects of crude oil and its derived products on marine ecosystems are well known. Both aliphatic and aromatic fractions possess toxic properties that can affect marine organisms. Particularly, sixteen unsubstituted PAHs have been recognized as priority pollutants for the Word Health Organization, the Economic European Community, and the USA Environmental Protection Agency (Hellow et al., 1994). Many PAHs have been found to be carcinogenic in mammals and, consequently, there is concern over the mobilization of PAHs and their metabolites into marine food chains via bioaccumulation and trophic transfer from benthic fauna (Ferguson and Chandler, 1998).Fil: Massara Paletto, V.. Instituto Nacional de Tecnología Agropecuaria; ArgentinaFil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin
Natural and anthropogenic hydrocarbons in sediments from the Chubut River (Patagonia, Argentina)
No full textIn march of 2001 a study was carried out to evaluate hydrocarbon levels in the lower course of the Chubut River. The study included 12 sample stations along the river from San Cristobal Bridge to the confluence with the sea, in a 25 km straight-line extension in a urbanized area. In the first 11 stations, resolved aliphatic (RAli) hydrocarbons presented low values, between 0.07 and 0.96 lg/g dry weight (dw); the unresolved complex mixture (UCM) between 0.42 and 2.72 lg/g dw, and the total aliphatic (TAli) hydrocarbons between 0.55 and 3.07 lg/g dw. In the last station, at the mouth of Chubut river, these values increased to 460, 284, and 741 lg/g dw for RAli, UCM and TAli, respectively. The n-alkanes distribution indices and the compositional parameters suggested a predominantly biogenic origin in eleven stations, and a predominantly anthropogenic origin in the last station, with the highest hydrocarbon values. It is possible to conclude that the stations with low hydrocarbon values and biogenic origin predominance would constitute the baseline of aliphatic hydrocarbons for river sediments at this zone. The station with the highest hydrocarbon concentration and predominantly anthropic origin was related to the presence of Rawson city’s port, where its activities (harbor and fishing vessels) generate hydrocarbon wastes unrelated to the river base profile in the study zone. Offshore, but within the river influence, there is an important fishing area of Argentine Red and Patagonian shrimps (Pleoticus muelleri and Artemesia longinaris, respectively).Fil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Esteves, Jose Luis. Fundacion Patagonia Natural; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin
Stages for the More Sustainable Farm
No full textCurrently, agricultural farm units are faced with a double and most times contradictory challenge, in order to be successful: on the one hand the invested capital has to be profitable and the economic performance has to be maximised. On the other hand, given the socio-environmental situation, it is necessary to preserve and to protect the environment and natural resources. Given the potential conflict of the two aims, since the satisfaction of one implies the underperformance of the other (and vice versa), the question then is: which is the solution to choose? We intend, in this work, to formulate a farm plan with the purpose of reconciling the criteria of environmental sustainability with that of economic competitiveness. For this achievement we proceed to the comparative study of sustainability of different groups of farms identified in the study area (first evaluation cycle) through MESMIS (“Marco para la Evaluación de Sistemas de Manejo de Recursos Naturales Mediante Indicadores de Sustentabilidad” - Framework for Evaluation of Natural-Resource Systems Handling through Sustainability Indicators) methodology, that allowed to select the more sustainable group of farms. Based on the found potentialities and weakness on these production systems, we stepped to the planning of a production unit of bovine meat, which obeys simultaneously to economic and environmental objectives, using Multicriteria Decision. We finished the work with the sustainability evaluation between groups of farms identified previously and the planned farms (second evaluation cycle), based, again, in the MESMIS methodology, to confirm (or not) the greatest sustainability of the last ones. Analyses of the results allow us to confirm the greatest relative sustainability of the planned farm, for the diverse traced scenarios.Decision taking, planning, sustainability, Environmental Economics and Policy, Farm Management,
Parole d'artiste : Marta Cuscunà
No full textInternational audienceModeration of the interview with Marta Cuscunà, an Italian performer, director, puppeteer and author. In 2009, she was awarded the Premio Scenario per Ustica for E bello vivere liberi!, first show of a trilogy on female resistance, followed by La semplicità ingannata (2012) and Sorry, boys (2015). These three texts are published in Resistenze femminili (Udine: Forum, 2019). In 2018 she created Il canto della caduta. Earthbound (2021) is her last devised show, which brings in the themes of ecofeminism, taking cues from the theories of Donna Haraway and Bruno Latour. In 2021 she became associate artist at the Piccolo Teatro in Milan. In 2023, she is guest of honor at the 11th Biennale internationale des arts de la marionette in Paris. She was awarded the prizes Rete Critica (2017), Premio della Critica – ANCT (2018) and Premio Hystrio - Altre Muse (2019).Animation de la discussion avec Marta Cuscunà, performeuse, metteuse en scène, marionnettiste et autrice italienne. En 2009, elle a remporté le prix Premio Scenario per Ustica pour È bello vivere liberi !, premier spectacle d’une trilogie sur les résistances féminines, suivi par La semplicità ingannata (2012) et Sorry, boys (2015). Ces trois textes ont été réunis dans Resistenze femminili (Udine : Forum, 2019). En 2018, elle a créé Il canto della caduta. Son dernier spectacle, Earthbound (2021), traite de l’écoféminisme en s’inspirant des théories de Donna Haraway et de Bruno Latour. En 2021, elle devient artiste associée au Piccolo Teatro de Milan. En 2023, elle est invitée d’honneur à la Biennale Internationale des Arts de la Marionnette à Paris. Elle a obtenu les prix Premio Rete Critica (2017), Premio della Critica – ANCT (2018) et Premio Hystrio - Altre Muse (2019)
Effect of pH modification on bilge waste biodegradation by a native microbial community
No full textDuring laboratory biodegradation of the oily liquid residue generated in normal ship operations, bilge waste, by an adapted native microbial community, bioemulsifier production and decrease in pH were observed. When the pH of the medium was modified by adding NaOH or buffering with Tris-HCl (pH 7.8), the greatest hydrocarbon reduction and biodegradation were found with NaOH treatment. With this treatment, total hydrocarbon removal and biodegradation efficiencies of, respectively, 97% and 86% for n-alkanes, 40% and 30% for total aliphatic hydrocarbons and 25% and 17% for total aromatic hydrocarbons were recorded after culture for 10 days. The emulsifying activity (quantified as emulsion index E24) was highest (60%) for neutralized treatment. For the three treatments the emulsifier activity was optimal at pH 6.5-7.5. Therefore, the culture medium should be neutralized to increase the rate of biodegradation and to minimize the residence time of the waste in a treatment unit.Fil: Nievas El Makte, Marina Lucrecia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Bucala, Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina. Universidad Nacional del Sur. Departamento de Ingeniería Química; Argentin
Biosurfactant-enhanced degradation of residual hydrocarbons from ship bilge wastes
No full textThe use of Bacillus subtilis O9 biosurfactant (surfactin) and of bioaugmentation to improve the treatment of residual hydrocarbons from ship bilge wastes was studied. A biodegradation experiment was conducted in aquaria placed outdoors under non-aseptic conditions. Three treatments were examined: culture medium plus bilge wastes, bioaugmentation with microorganisms from bilge wastes, and bioaugmentation plus biosurfactant. Samples were analyzed for viable counts, aliphatic and aromatic hydrocarbon concentrations, n-C17/pristane and n-C18/phytane ratios. While the addition of biosurfactant stimulated hydrocarbon degradation, bioaugmentation did not produce any remarkable effect. At day 10, the remaining percentages of aliphatic and aromatic hydrocarbons in aquaria, which received biosurfactant, were 6.8 and 7.2, respectively, while it took 20 days to reach comparable results with the other treatments. The biosurfactant did not affect the preferential biodegradation of n-C17/pristane and n-C18/phytane. This biosurfactant, which can be produced in a relatively simple and inexpensive process, is a promising alternative in the optimization of hydrocarbon waste treatment.Fil: Olivera, Nelda Lila. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; ArgentinaFil: Morán, A. C.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Planta Piloto de Procesos Industriales Microbiológicos; ArgentinaFil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Nacional Patagónico; Argentin
Sources and distribution of aliphatic and polyaromatic hydrocarbons in coastal sediments from the Ushuaia Bay (Tierra del Fuego, Patagonia, Argentina)
No full textThe environmental quality of Ushuaia Bay, located at the southernmost tip of South America, is affected by the anthropogenic pressure of Ushuaia city. In this study, levels and sources of hydrocarbons in coastal sediments were assessed. Aliphatic hydrocarbon fractions ranged between 5.5 and 1185.3 μg/g dry weight and PAHs from not detected to 360 ng/g. Aliphatic diagnostic indices, the nalkanes homologous series occurrence, Aliphatic Unresolved Complex Mixtures (AliUCMs), and pristane and phytane isoprenoids indicated a petrogenic input. Some sites showed biogenic features masked by the anthropogenic signature. Particularly in port areas biodegradation processes were evident. PAH ratios showed a mixture of petrogenic and pyrogenic sources. Aliphatic and aromatic UCMs were strongly correlated, reflecting chronic pollution. Three areas were distinguished inside the bay: (1) east, with low hydrocarbons impact; (2) central, where hydrocarbons accumulation was related to source proximity and sediment characteristics; (3) south-west, where sediment characteristics and current circulation favour hydrocarbons accumulation.Fil: Commendatore, Marta Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Nievas El Makte, Marina Lucrecia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; ArgentinaFil: Amin, Oscar Antonio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Esteves, Jose Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico; Argentin
Proposal for the optional subject Business Protocol in the career Bachelor in Education Economy.
No full textLa presente investigación educativa está encaminada al mejoramiento cualitativo en las normas de cortesía y protocolo en las distintas actividades sociales de los estudiantes y profesores de la Facultad de Ciencias Económicas de la Universidad Central “Marta Abreu” de Las Villas y de la eficiencia en aspectos particulares, para afianzar la buena imagen constituye, para el autor del estudio, el punto de partida para crear la línea de investigación en la carrera de Licenciatura en Educación Economía y el Grupo de Trabajo Científico Estudiantil Protocolo Empresarial, con la participación de los estudiantes del tercer año y profesores de la carrera de Licenciatura en Educación Economía; las temáticas a desarrollar responden a las investigaciones del profesor líder Ms.C. José Miguel Garcia Aguiar; que se integra al Proyecto Asociado a Programa; Sistema de Educación Cubano Perspectiva en Desarrollo, que dirige desde CITMA el DrC. Poul Torres; siendo miembro activo en el proyecto “La Educación Ciudadana y la Educación Cívica en la Escuela Cubana Actual que dirige DrC. J. Gardenia Ruiz Rodríguez. Profesora Titular que imparte la docencia en la carrera de Marxismo –Leninismo e Historia en la Sede Pedagógica “Félix Varela”. La novedad científica de la investigación radica en la concepción pedagógica del programa de la asignatura optativa Protocolo Empresarial, el cual incluye de forma holística diferentes momentos de reflexión individual y colectiva, para la investigación, aplicación y creación, al modelar las normas de cortesía y protocolo, en el área laboral y el personal en el contexto de la esfera empresarial.The present educational research is aimed at qualitative improvement in the rules of courtesy and protocol in the different social activities of the students and professors of the Faculty of Economics of the Central University "Marta Abreu" of Las Villas and the efficiency in particular aspects , To consolidate the good image constitutes, for the author of the study, the starting point to create the line of research in the career of Bachelor of Education Economics and the Working Group Scientific Student Business Protocol, with the participation of students of the third Year and professors of the Bachelor of Education in Economics; The topics to be developed respond to the research of the leading teacher Ms.C. José Miguel Garcia Aguiar; Which is part of the Program Associated Project; Cuban Education System Perspective in Development, directed by CITMA DrC. Poul Torres; Being an active member in the project "Citizen Education and Civic Education in the Current Cuban School directed by DrC. J. Gardenia Ruiz Rodríguez. Full Professor who teaches in the career of Marxism - Leninism and History in the Pedagogical Headquarters "Felix Varela". The scientific novelty of the research lies in the pedagogical conception of the program of the optional Business Protocol, which holistically includes different moments of individual and collective reflection for research, application and creation, in modeling the rules of courtesy and protocol, In the area of labor and personnel in the context of the business sphere.
Palabras claves: Etiqueta; Protocolo; Diplomacia; Protocolo empresarial;
Protocolo como individuo; Protocolo con el cliente
Recursos tic para la promoción de salud mental positiva a estudiantes universitarios en tiempos de coronavirus
No full textEl presente proyecto tuvo como objetivo generar recursos audiovisuales basados en TIC para promover bienestar y salud mental positiva en estudiantes universitarios en tiempos de pandemia. Se creó una Estrategia de comunicación del conocimiento que consistió en generar recursos audiovisuales basados en TIC para promover bienestar y salud mental positiva en estudiantes universitarios en tiempos de pandemia, vinculada al proyecto INV 2371 ESTUDIO DE LAS PROPIEDADES PSICOMÉTRICAS DE LAS ESCALAS DE BIENESTAR DE DIENER EN POBLACIÓN COLOMBIANA cuya autora principal es la Dra. Marta Martín. Los tipos de recursos audiovisuales generados fueron infografías, podCaps, videos, y poster, en total fueron 10 recursos, con un resultado en general de 423 vistas, 240 like y 10 opiniones. Por los resultados de la encuesta de opinión se concluyó que las tic juegan un papel fundamental en la promoción de salud mental, puesto que la mayoría de los estudiantes encuestados les pareció bueno el material expuesto.The objective of this project was to generate audiovisual resources based on ICT to promote well-being and positive mental health in university students in times of pandemic. A Knowledge Communication Strategy was created that consisted of generating ICT-based audiovisual resources to promote well-being and positive mental health in university students in times of pandemic, linked to the INV 2371 project STUDY OF THE PSYCHOMETRIC PROPERTIES OF THE WELL-BEING SCALES OF DIENER IN COLOMBIAN POPULATION whose main author is Dr. Marta Martín. The types of audiovisual resources generated were infographics, podCaps, videos, and posters, in total there were 10 resources, with an overall result of 423 views, 240 likes and 10 opinions. Based on the results of the opinion survey, it was concluded that ict plays a fundamental role in promoting mental health, since most of the students surveyed found the exposed material to be good.Resumen. -- Abstrac. -- 1 Justificación. -- 2 Objetivo general. -- 3 Marco conceptual. -- 4 Estado del arte. -- 5 Metodología. -- 6 Resultados. -- 7 Análisis. -- 8 Resultados de la encuesta de opinión. -- 9 Conclusión. -- 10 Recomendaciones. -- 11 [email protected]
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