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Sample records for argentina secado solar

  1. Solar drying: An appropriate technology for the north Argentina; Secado solar: Una tecnologia apropiada para el norte argentino

    Energy Technology Data Exchange (ETDEWEB)

    Zurlo, Hugo D; Vergara, Liliana; Spotorno, Ruben; Benitez, Francisco; De Pedro, Jorge; Cervino, Veronica; Monzon, Sergio [Universidad Tecnologica Nacional, Chaco (Argentina)

    2000-07-01

    The results concerning to solar drying of nutritious products for rehearsed a low cost solar dryer, adapted to the area, composed by a plane solar collector of 2 m{sup 2} and a drying camera with capacity for, approximately, 5 kg of product. The objectives of the work were: a) to develop a low cost solar dry, capable to dehydrate products for human alimentary use; b) to transfer the developed technology to low resources rural communities through the INCUPO (Institute of Popular Culture) and to small producers through the INTA (National Institute of Agricultural Technology) and c) to diffuse the practice of the solar drying among small producers. The diffusion and transfer of the developed technology to small rural producers, contribute to improve their quality of life when facilitating them additional revenues for productive diversification, besides the contribution to the sustainable use of the forest like source of non conventional nutritious resources contributing to the task of cultural rescue faced by organizations like the INCUPO. [Spanish] Se exponen los resultados concernientes al secado solar de productos alimenticios para consumo humano. Se diseno, construyo y ensayo un secador solar de bajo costo, adaptado a la zona, compuesto por un colector solar plano de 2m{sup 2} y una camara de secado con capacidad para, aproximadamente, 5 kg de producto fresco. Los objetivos del trabajo fueron: a) desarrollar un secadero solar de bajo costo, apto para deshidratar productos para uso alimentario humano; b) transferir la tecnologia desarrollada a comunidades rurales de bajos recursos a traves del INCUPO (Instituto de Cultura Popular) y a pequenos productores a traves del INTA (Instituto Nacional de Tecnologia Agropecuaria) y c) difundir la practica del secado solar entre productores frutihorticolas. La difusion y transferencia de la tecnologia desarrollada a pequenos productores rurales, contribuye a mejorar su calidad de vida al posibilitarles ingresos adicionales

  2. Aplicación de la energía solar en el secado de granos

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    Andrés Bello G.

    1983-01-01

    Full Text Available En este artículo se presenta la síntesis del procedimiento y los resultados obtenidos en un prototipo de colector almacenador solar para secado de granos, como parte de las investigaciones que está desarrollando el Departamento de Ingeniería Mecánica.

  3. Potencial de secado de yuca con aire natural y energía solar

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    Alfonso Parra Coronado

    1990-01-01

    Full Text Available En este trabajo se presentan los resultados de estudios del potencial de secado de productos agropecuarios con aire natural y energía solar de regiones tropicales, considerando el caso específico de la yuca. La evaluación del potencial de secado de una región se basa en el uso de un programa de computador  Simulación matemática, mediante el cual se obtienen los valores del caudal mínimo de aire requerido para secar el producto antes que éste alcance un nivel de deterioro preestablecido. Otros elementos metodológicos incluyen: manejo de la información meteorológica, mes crítico, patrón de agitación del producto, hora de iniciación del secado, patrón de operación del ventilador, uso de calor suplementario (energía solar e interpretación de los resultados con el fin de optimizar el sistema. Se presentan mapas para Colombia de líneas isocaudales e isoáreas de colector solar plano, con base en los cuales se puede obtener fácilmente la información requerida para el diseño de sistemas de secado de yuca a baja temperatura.

  4. Desarrollo de un horno solar para el secado de plantas y vegetales usando control difuso

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    Oscar G. Ibarra Manzano

    2012-05-01

    Full Text Available Recientemente, el aprovechamiento de la energía solar en el deshidratado de productos agrícolas se ha vuelto cada día más común debido a los altos rendimientos en los productos post-cosecha. La inversión en tecnologías propias para contribuir con los productores del sector agroalimentario es un factor importante para el desarrollo de las cadenas produc­tivas de nuestro país. En este trabajo se presenta el desarrollo de un horno solar para el secado de plantas y vegetales utilizando control difuso. Este es un sistema térmicamente controlado que permite disminuir el tiempo de secado de varios días a unas horas. Se reali­zaron pruebas de secado usando flor de jamaica, en las cuales se pudo disminuir el tiempo de secado de cuatro días a aproximadamente 5 h. Se presentan tanto la parte de diseño conceptual, como resultados experimentales del mismo. Los resultados obtenidos permiten ver la viabilidad del diseño propuesto.Recently, the use of solar energy in the dehydration of agricultural products is becomingmore common as high yields in the post-harvest products. Investment in technologies forcontributing to the producers of food products is an important factor for the development ofthe productive chains of our country. This paper presents the development of a solar oven fordrying plants and vegetables using fuzzy control. This is a heat-controlled system that allowsdecreasing the drying time from several days to hours. Drying tests were conducted usingjamaica flower, which could decrease the drying time from four days to about 5 h. We presentboth the conceptual design of the experimental results. The results obtained allow us to seethe feasibility of the proposed design.

  5. Estudio regional del potencial de secado con aire natural y energía solar

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    Jorge Domínguez P.

    1983-09-01

    Full Text Available En este artículo se presenta y aplica una metodología de trabajo basada en la técnica de simulación matemática y desarrollada con el fin de realizar estudios sobre el potencial de secado de productos agropecuarios con aire natural y energía solar de regiones tropicales. La metodología se basa en el uso de un programa de computador e Incluye otros elementos metodológicos en relación con el manejo de la información meteorológica, el patrón de operación del ventilador, el uso de energía solar y la interpretación de los resultados con el fin de optimizar el sistema. Se reportan los resultados del estudio del potencial de secado con aire natural y energía solar de Tuluá (Valle y se proporcionan recomendaciones específicas para la implementación de sistemas de secado a bala temperatura en la Reglón.

  6. Comportamiento de la humedad durante el secado solar del mineral laterítico

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    Arturo L. Rojas-Purón

    2007-03-01

    Full Text Available En las empresas cubanas del níquel que utilizan el proceso Caron, el contenido elevado de humedad en la material prima mineral incide en el aumento del consumo de combustible en los secadores durante el secado térmico. Se evaluó de forma experimental la humedad durante el secado solar del mineral laterítico a la intemperie. El método de análisis de la humedad utilizado fue el de diferencias de pesadas. Se empleó la regression lineal multiple para establecer los modelos matemáticos de las masas de trabajo. El estudio demostró que los parámetros climatológicos más influyentes en el secado solar del mineral laterítico son la temperatura del medio ambiente, las precipitaciones, la velocidad del viento y la temperatura del punto de rocío, así como que solamente el agua no estructural es la que puede ser eliminada. La humedad se redujo en un 13 %.

  7. Correlaciones de parámetros medios de proceso para el secado de productos agropecuarios en cama fina en secadores solares directos

    OpenAIRE

    Bergues-Ricardo, Ciro César; Díaz-López, José Raúl; Torres-Ten, Alonso

    2013-01-01

    Se da un grupo de correlaciones entre la velocidad media de secado, las pérdidas de energía, la energía útil y la eficiencia térmica media del proceso, válidas para condiciones de secado en cama fina en secadores solares directos, y contribuyen a un enfoque integral del secado solar en estas condiciones. Ellas son válidas para procesos de secado de diversos productos agropecuarios tales como viandas, vegetales, frutas, granos y madera con convección natural o forzada. Las correlaciones fueron...

  8. Evaluación de un secadero solar tendalero túnel: estudio de secado de manzanas.

    OpenAIRE

    Iriarte, Adolfo Antonio; Bistoni, Silvia Noemi; Garcia, Victor Orlando; Luque, V.

    2015-01-01

    En la selección de un secadero solar se debe tener en cuenta las características del producto a secar, la ubicación geográfica del emprendimiento y el factor económico. A nivel nacional no existe una norma para evaluar la performance de un sistema de secado. En el presente trabajo se evalúa un secadero solar tipo túnel con convección forzada Está formado por dos partes: un colector solar y a continuación la cámara de secado. El producto utilizado fue manzana tipo comercial (61,7 kg), cortad...

  9. Simulación matemática y optimización del secado de productos agropecuarios con aire natural y energía solar

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    Jorge H. Domínguez

    1983-05-01

    Full Text Available En este trabajo se discuten las principales características de los sistemas de secado de productos agropecuarios con aire natural y energía solar y se presenta un programa de computador con el cual es posible simular, simultáneamente, la variación meteorológica, el proceso de secado y el proceso de deterioración de productos agropecuarios y optimizar el diseño de sistemas de secado solar y natural. EI programa constituye una herramienta básica que forma parte de una metodología de trabajo desarrollada por los autores para el estudio y evaluación desde el punto de vista técnico del potencial de secado con aire natural y energía solar de regiones tropicales.

  10. Comportamiento de la adherencia en menas lateríticas sometidas a secado solar natural

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    Naísma Hernández-Jatib

    2009-03-01

    Full Text Available El alto contenido de humedad de la mena laterítica provoca su adherencia a las paredes de las tolvas donde es almacenada y, por consiguiente, disminuye la cantidad alimentada a los secaderos e incrementa el consumo de combustible durante el secado térmico en los tambores rotarios. Para evaluar el comportamiento de la adherencia en menas sometidas a secado solar natural se estudiaron experimentalmente dos pilas expuestas a condiciones ambientales naturales. Los experimentos consistieron en verter (para valores conocidos de humedad 300 g de mena desde una altura de 0,5 m sobre una placa de cristal con distinta inclinación (20 y 25 grados. Se tamizaron las muestras de una de las pilas para evaluar la influencia de la granulometría sobre la adherencia. Se encontró que la adherencia de la mena no está determinada solamente por el contenido de humedad, sino además por su granulometría y por el ángulo de inclinación de la superficie de contacto. El menor porcentaje de adherencia para granulometría heterogénea se obtuvo para valores de humedad igual o inferior a 32%. También se evidenció que para contenido de humedad igual a 35% o mayor, el ángulo de inclinación de la superficie de contacto con la mena no influye notablemente en la adherencia cuando la mena es previamente tamizada.

  11. Hybrid system: Heat pump-solar air dryer for grains; Sistema hibrido: bomba de calor - calentador solar de aire para el secado de productos agricolas

    Energy Technology Data Exchange (ETDEWEB)

    Soto Gomez, Willfredo [Instituto Tecnologico de Tijuana, Tijuana (Mexico); Ortega Herrera, Jose Angel [Instituto Politecnico Nacional, Mexico, D.F. (Mexico)

    2000-07-01

    Design, building, operation and evaluation energy wise of a hybrid experimental type, with heat pump, that uses no chloride, does not destroy the ozone layer. It is solar air dryer for grains. In this research we dry rice. It has tree systems: 1.- A mechanical compression heat pump, 2.- An air solar heater, and 3.- An agriculture products dryer. The drying capacity is 20 pounds of grain /day, with a median daily solar radiation. The costs is approximately U.S. $ 6 000.00. The heat pump used 22 refrigerant first, and now works with refrigerant SUVA 9000. This refrigerant will be available this year in the I.S., it is one of the ecological class that substitutes the chlorofluorocarbonates. [Spanish] Se disena, construye, opera, y evalua energeticamente, un sistema hibrido tipo experimental, con bomba de calor que utiliza refrigerante que no contiene cloro, y no destruye la capa de ozono y un calentador solar de aire, para secar granos. En este trabajo secamos arroz. Se compone de tres sistemas: 1.- Bomba de calor por compresion mecanica, 2.- Calentador solar de aire, 3.- Secador de productos agricolas. La capacidad de secado es de 10 Kilos de granos/dia promedio. Tiene un costo aproximado de $ 60 000. La bomba de calor utiliza refrigerante 22 en una primera generacion, y actualmente opera con un refrigerante SUVA 9000, en una segunda generacion, este refrigerante se comercializara en este ano, en la Union Americana, pertenece a la familia de los llamados refrigerantes ecologicos, sustitutos de los clorofluorocarbonados.

  12. Elimination of pathogenic bacteria in sewage sludge during the solar drying; Eliminacion de bacterias patogenas en lodos residuales durante el secado solar

    Energy Technology Data Exchange (ETDEWEB)

    Cota Espericueta, Alma Delia; Ponce Corral, Carlos [Instituto de Ciencias Biomedicas, Universidad Autonoma de Ciudad Juarez, Ciudad Juarez, Chihuahua, (Mexico)

    2008-11-15

    Planta de Tratamiento de Aguas Residuales de Ciudad Juarez. El dispositivo solar fue propuesto como una alternativa tecnica factible para la reduccion de volumen de las 135 ton de lodos generadas por dia en esta planta. El prototipo experimental tipo invernadero estuvo constituido por un area de captacion de 4.5 m{sup 2} y un lecho de secado de 1 m{sup 3}, ademas de los sistemas de ventilacion, extraccion y adquisicion de datos. El funcionamiento automatico del dispositivo estuvo regulado por las diferencias entre las condiciones internas y externas de las variables de temperatura y humedad. Ademas, se midieron la radiacion solar, el pH y la humedad del lodo. La efectividad del secador fue determinada en terminos termicos y microbiologicos. La perdida de agua en el lodo durante el tratamiento fue el indicativo de la efectividad termica. La depuracion microbiologica fue cuantificada a diferentes tiempos de residencia, mediante los indicadores de contaminacion: coliformes fecales y Salmonella spp. La cuantificacion de ambas bacterias se realizo a traves de la tecnica microbiologica de tubos de fermentacion multiple expuesta en la Norma Oficial Mexicana NOM-004-SEMARNAT-2002. Los resultados termicos asociados al contenido de agua en el lodo mostraron un decaimiento exponencial hasta lograr el 99 % de reduccion de la misma. En lo referente a la efectividad microbiologica, existio dependencia del contenido de las bacterias indicadoras con la cantidad de agua presente en lodo. Para la remocion del 92 % de agua, se verifico la eliminacion de coliformes fecales desde 3.8x10{sup 6} hasta 1.6 NMP por gramo de lodo seco y para Salmonella spp. dicha reduccion fue desde 1.5x10{sup 1}3 hasta 1.9x10{sup 3} NMP por gramo de lodo seco.

  13. Modelación matemática del área de exposición y del volumen de las pilas de menas lateríticas expuestas a secado solar natural

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    Yoalbys Retirado-Mediaceja

    2011-10-01

    Full Text Available Las menas lateríticas cubanas se exponen, en forma de pilas, a la radiación solar y la convección del aire para reducirles el contenido de humedad mediante la implementación del proceso de secado solar natural. La confección de las pilas de minerales se basa en criterios empíricos y, en consecuencia, no se conoce el área de exposición de las mismas y el volumen de mineral expuesto al secado. En este artículo se establecen los modelos matemáticos que permiten calcular, de forma precisa, la longitud de la superficie lateral, la altura, el área de exposición y el volumen de las pilas de mineral, en función de las dimensiones de la superficie horizontal disponible para el secado y de dos propiedades del material: la granulometría y la humedad. Las ecuaciones matemáticas establecidas caracterizan a las pilas con simetría axial y secciones transversales semi-elípticas, hiperbólicas, parabólicas y triangulares. Se aplicaron los modelos obtenidos a un caso de estudio para una superficie horizontal disponible de 40 m de largo y 5 m de ancho, considerando los valores medios de los ángulos de reposo maximal y tangencial de las menas lateríticas cubanas.

  14. Análisis estadístico exploratorio de dos tipos de secado de quinua

    OpenAIRE

    Mena Reinoso, Angel Patricio

    2015-01-01

    El presente trabajo “Análisis Estadístico Exploratorio de dos Tipos de Secado de Quinua” permite realizar una validación estadística del tipo de secador que posea una alta eficiencia, rendimiento en el secado de este tipo de cereal (Chenopodium quinoa Willd). Para el efecto se empleó el secador de bandejas y un secador solar tipo invernadero, el experimento se llevó a cabo con tres tipos de muestras, una con cascara y las otras escarificadas. La quinua fue sometida a un secado ...

  15. Alternatives for the assessment of the solar resource in Argentina

    International Nuclear Information System (INIS)

    Grossi Gallegos, H; Righini, R; Raichijk, C

    2005-01-01

    In Argentina, from 1972 on, several maps were presented which reported the distribution of global solar irradiation received on a horizontal plane placed at ground level and which used different time bases and information quality, whether estimates obtained from correlations established with other meteorological variables or direct irradiation measurements.n a paper by Grossi Gallegos (1998) 12 charts were presented with the monthly distribution of the mean value of daily global irradiation and one with their annual distribution, using all available information up to that moment in Argentina, whether from daily irradiation data obtained with Argentina s Solarimetric Network pyrano meters or sunshine hours measured by the National Meteorological Service (SMN) Network; the error due to the inclusion of estimates and interpolations was evaluated as lower than 10%.Argentina's Solarimetric Network underwent a continuous decrease in the number of operational stations due to the lack of resources for supporting them.In view of this situation, different alternatives were gradually evaluated which would make it possible to improve the already mentioned available global solar irradiation charts.In this sense, a statistical survey of the adjustment of satellite irradiation data available in Internet (in the base known as Surface Solar Energy (SSE) Data Set, Version 1.00) to the ground values.The objective was evaluating the possibility of using them as a complement to the data that had already been used and their application in order to obtain contour maps in homogeneous zones such as the Pampa Humeda, using geostatistical methods for drawing the irradiation isolines.Root-mean-square errors (RMSE) range from 3.7% to 24.8% depending on the inhomogeneity of the area. Nevertheless, the available temporal series are limited in time and thus their climatic representativity can be questioned.Given the shortage of solar irradiation measured data accurate enough to fulfill

  16. Secado de piezas de porcelana mediante microondas

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    Quintanilla, J.

    1999-04-01

    Full Text Available During conventional drying, parts are heated from the outside creating large humidity and temperature gradients which, in turn, generate stresses due to differential shrinking of the part promoting their fracture. Besides, this process is very lenghty creating two important bottlenecks in the production of porcelain parts: drying and storage before refining and biscuit firing. Microwave technology can solve these problems since parts are heated more homogenously and very quickly with smaller humidity and thermal gradients and, thus, shorter drying times and fewer rejects. Probably the main problem in microwave drying of these products is the need to dry simultaneously parts with very different sizes, weights, thicknesses and geometries. This paper describes microwave drying of porcelain parts both individually and mixing diferent parts simultaneously. The results obtained indicate that drying times can be reduced drastically and that parts with diferent geometries and sizes do not pose a problem. Besides, the economic benefits that can be derived by introducing microwave technology in the drying process of porcelain parts are estimated.

    Durante el secado convencional, las piezas se calientan desde el exterior dando lugar a elevados gradientes de humedad y temperatura que, a su vez, generan tensiones como consecuencia de contracciones diferenciales de la pieza facilitando su fractura. Además, este proceso es muy largo creando dos importantes cuellos de botella del proceso de fabricación de piezas de porcelana: secado y almacenamiento previo al refino y al bizcochado. El secado por microondas permite solventar estos problemas debido a que las piezas se secan de forma mucho más homogénea y rápida con gradientes de humedad y térmicos inferiores, reduciéndose el número de rechazos y el tiempo de secado. Probablemente el mayor problema del secado por microondas de este tipo de productos consiste en la necesidad de secar simult

  17. Argentina.

    Science.gov (United States)

    1986-06-01

    This discussion of Argentina covers geography, the people, history and political conditions, government, economy, foreign relations, and relations between the US and Argentina. In 1985, the population of Argentina was estimated to be 30.6 million with an estimated annual growth rate of 1.5%. The infant mortality rate is 34.1/1000, and life expectancy is 70.2 years. Argentina, which shares land borders with Bolivia, Brazil, Chile, Paraguay, and Uruguay, is bounded by the Atlantic and the Antarctic Oceans. Descendants of Italian and Spanish immigrants predominate in Argentina, but many trace their origins to British and West and East European ancestors. In recent years, there has been a substantial influx of immigrants from neighboring Latin American countries. The native Indian population, estimated to be 50,000, is concentrated in the peripheral provinces of the north, northwest, and south. What is now Argentina was discovered in 1516 by the Spanish navigator Juan de Solia. The formal declaration of independence from Spain was made on July 9, 1816. In the late 19th century, 2 forces worked to create the modern Argentine nation: the introduction of modern agricultural techniques and the integration of Argentina into the world economy. Argentina has impressive human and natural resources, but political conflict and uneven economic performance since World War II have impeded full realization of its considerable potential. Yet, it is one of the wealthiest countries in Latin America. Among the reasons for the military coup of March 1976 was the deteriorating economy, caused by declining production and rampant inflation. Under the leadership of the Minister of the Economy, the military government focused attention on those immediate problems, and, in 1978, embarked on a new development strategy focusing on the establishment of a free market economy. There was little improvement in the economy, and a new economic plan was introduced in 1985 which has capped inflation by

  18. Argentina

    International Nuclear Information System (INIS)

    Masters, R.

    1997-01-01

    This article provides information on the energy resources, government, electricity supply, nuclear industry and fuel cycle of Argentina. About 12% of electric power produced is generated from nuclear power plants. The operating capacity, history and partial privatisation of the nuclear industry are covered, and fuel cycle facilities described. These include uranium mining and processing, enrichment, fuel fabrication and heavy water production. (UK)

  19. Argentina

    International Nuclear Information System (INIS)

    2001-04-01

    This economical study summarizes the energy situation of Argentina: energy institutions and policy, energy companies (oil, electricity, gas, coal), energy supplies (resources, power production, petroleum, natural gas), prices and tariffs, consumption, economical stakes and perspectives (investments, agreements, projects). Energy data for the 1971-1999 period are summarized in graphs and tables. (J.S.)

  20. Argentina

    Energy Technology Data Exchange (ETDEWEB)

    1999-09-01

    This report presents a brief overview of the socio-economic, energy and environmental context in which climate change mitigation actions in Argentina shall be inserted. To that end, the dynamic of the Argentine economic development, its influence on the energy system and environmental impacts is summarised. From the environmental standpoint, emphasis shall only be made on the impact of economic development patterns and energy policies on GHG emission. (au) 73 refs.

  1. Argentina

    International Nuclear Information System (INIS)

    Tanis, S.; Ramberg, B.

    1990-01-01

    Argentina has embarked on an ambitious domestic nuclear research and energy program. The venture promises to provide the nation with the infrastructure to play an important role in the nuclear export market in the years ahead. Buenos Aires built its program on a foundation of international support and assistance that overlay an emerging sophisticated industrial and scientific establishment. The foreign contribution sensitized Argentina to opportunities in the global market. This paper reports that Argentina operates two heavy-water/natural uranium reactors, Atucha I and Embalse. Producing, respectively, 320 MW(e) and 600 MW(e), they supply roughly 10 percent of the country's electricity. With a capacity factor of 84 percent, Atucha I is among the best operated plants in the world. Plans call for a third, 745 MW(e) power plant, Atucha II, to go on line in the early 1990s. During this period, construction also may begin on three 300 MW(e) plants, although the country's foreign indebtedness plus cost overruns in earlier construction will place a heavy burden on these plans

  2. SISTEMAS DE SECADO DEL ALMIDÓN DE YUCA PARA USO HUMANO EN UNA COMUNIDAD DE ECUADOR

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    Flor María Cárdenas Guillén

    2015-06-01

    Full Text Available El estudio tuvo por objetivo evaluar dos tipos de sistemas de secado de almidón de yuca (el secado tradicional al ambiente, sobre piso de cemento recubierto con polietileno negro de calibre número 6, y el eco tecnológico con armazón de madera, placa metálica y cubierta de vidrio. El trabajo se ejecutó en la comunidad de San Pablo de Tarugo, Chone-Manabí. Se construyó el secador solar y se lo adaptó a las condiciones de la zona. Para la medición del porcentaje de humedad del almidón, al ingreso y salida de ambos sistemas, se empleó el método convencional No. 925.09 AOAC. Se observó que el contenido de humedad inicial del almidón fluctúa entre 42,6% y 44,9%. Con el sistema de secado solar ecotecnológico, se registró temperaturas promedios de 31ºC y 60ºC, en la mañana y tarde, respectivamente. Igualmente, mediante el mismo sistema, se obtuvo el menor porcentaje de humedad de salida equivalente a 11,7%. Por lo tanto, el secador solar ecotecnológico es una opción viable en el secado del almidón de yuca, a pesar de las variaciones diarias del estado del tiempo.

  3. Argentina

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This paper reports that like so many other countries, Argentina is in the throes of privatization and restructuring of its economic programs. This has had a direct effect on the LPG industry. Argentina is a country with many natural resources. However, natural gas and crude, while present, are not in abundance. Imports of these and their associated products are needed to satisfy the growing need of the population from time to time. This is especially true with LPGs. Production of the fuel averages about 1 million tons, not enough to satisfy internal needs in the winter but enough to permit some exports in the summer to nearby Brazil. The Country's Congress approved a plan to sell-off or lease parts of the natural gas distribution network and other businesses of Gas del Estado. Subsequent new legislation has called for ten new natural gas distribution zones. Included in the sell-off is the company's propane distribution division. What is left of Gas del Estado and YPF will become a corporation in the true sense of the word. Stocks in YPF are to be sold to the public

  4. Argentina.

    Science.gov (United States)

    1993-02-01

    Background notes on Argentina provide a profile of the geography, selected demographic features, government and economic conditions. Descriptive text includes a discussion of the people, their history and political conditions, the government and officials, the state of the economy, their defense, foreign relations, and relations with the US. The 1992 estimated population was about 33 million of whom 97% are European (mostly Spanish and Italian). Religions represented are Roman Catholic (92%), Protestant (2%), Jewish (2%), and other (4%). Adult literacy is 95%. 36% are engaged in industry and commerce, 20% in services, 19% in agriculture, 6% in transport and communications, and 19% other. Per capita gross domestic product was $4,500. There are only 50,000 native Indians remaining in peripheral provinces. The population enjoys a high standard of living and a low growth rate. The country was shaped by dominant forces: modern agricultural techniques and the integration of the country into the world economy. Foreign investment aided the economic revolution. Conservative and radical rule has swung the country back and forth politically since 1916. Colonel Juan Domingo Peron led a successful military coup in 1943 and was elected in 1946. Policies were instituted to give a greater voice to the working class, and with the influences of his wife, women's groups. In 1955, he was ousted by the military, which failed to revive the economy and quiet increasing terrorism. After a number of difficult elections, Peron was reinstated as president in 1973. Extremists on the left and right threatened public order; the military as a consequence imprisoned persons indefinitely. Peron's wife succeeded him after his death, but was removed from office in the military coup of 1976. Basic human rights were violated during this period. By 1983, a fair election was held and support increased for a democratic system. In 1989, Carlos Saul Menem, a Peronist candidate, won and established

  5. Argentina

    Directory of Open Access Journals (Sweden)

    G. Benedetti

    2007-01-01

    Full Text Available El presente trabajo tiene como objetivo realizar un diagnóstico ambiental de un sector de la ciudad de Bahía Blanca, Argentina basado en el arbolado urbano de alineación. El arbolado constituye un componente fundamental de los paisajes artifi ciales ya que contribuye al aumento del confort y al mejoramiento de la calidad del medio. En este sentido, actúa como un factor moderador de las condiciones climáticas, la contaminación y la salud de la población. El municipio de la ciudad de Bahía Blanca tiene como proyecto la realización de inventarios del arbolado en los distintos barrios, para lograr optimizar la relación entre la cantidad de ejemplares arbóreos y la densidad poblacional. Es importante considerar la variedad de ejemplares en función del uso del suelo y de las características ambientales de cada sector. Por lo tanto, este trabajo presenta un diseño metodológico para la elaboración del plano verde de la ciudad.

  6. Development of solar energy education IASEE-Argentina, Arquisur and Alfa-built

    International Nuclear Information System (INIS)

    Schiller, S. de; Evans, J.M.

    1997-01-01

    Three educational experiences are presented in this paper on the development of national and regional networks to incorporate renewable energy in curricular programmes. IASEE-Argentina, established in 1990 as the National Section of IASEE, the International Association for Solar Energy Education, was designated in 1993 as the Education Working Group of ASADES, the Argentine Association of Solar Energy. It holds annual meetings to coincide with the ASADES conference. Arquisur is a regional network established by Architectural Faculties of State Universities within the Mercosur Region, covering Argentina, southern Brazil, Paraguay and Uruguay, to promote exchange and development between the 19 faculties involved. A Working Group set up by Arquisur with members from four countries developed the programme for short post-graduate courses on bioclimatic design and rational energy use in buildings, which has been given in Argentina and Uruguay. Alfa-Built, a project supported by the European Union for promoting academic exchange in the field of energy efficient building is also introduced. This paper presents the development and initial results of these educational experiences. (author)

  7. Process Heat Generation Potential from Solar Concentration Technologies in Latin America: The Case of Argentina

    Directory of Open Access Journals (Sweden)

    Isidoro Lillo

    2017-03-01

    Full Text Available This paper evaluates the potential of solar concentration technologies—compound parabolic collector (CPC, linear Fresnel collector (LFC and parabolic trough collector (PTC—as an alternative to conventional sources of energy for industrial processes in Latin America, where high levels of solar radiation and isolated areas without energy supply exist. The analysis is addressed from energy, economic and environmental perspective. A specific application for Argentina in which fourteen locations are analyzed is considered. Results show that solar concentration technologies can be an economically and environmentally viable alternative. Levelized cost of energy (LCOE ranges between 2.5 and 16.9 c€/kWh/m2 and greenhouse gas (GHG emissions avoided range between 33 and 348 kgCO2/(m2·year. CPC technology stands out as the most recommendable technology when the working fluid temperature ranges from 373 K to 423 K. As the working fluid temperature increases the differences between the LCOE values of the CPC and LFC technologies decrease. When 523 K is reached LFC technology is the one which presents the lowest LCOE values for all analyzed sites, while the LCOE values of PTC technology are close to CPC technology values. Results show that solar concentration technologies have reached economic and environmental competitiveness levels under certain scenarios, mainly linked to solar resource available, thermal level requirements and solar technology cost.

  8. Secado de trozos de yuca por convección natural en los valles de los ríos Cauca y Magdalena

    Directory of Open Access Journals (Sweden)

    Alfonso Parra Coronado

    1992-09-01

    Full Text Available En este artículo se presentan los resultados obtenidos en la evaluación del potencial de secado de yuca en trozos por convección natural en los Valles de los ríos Cauca y Magdalena, utilizando la metodología desarrollada en el Departamento de Ingeniería Agrícola de la Universidad Nacional de Colombia sede Santafé de Bogotá, D.C., por Domínguez J. y Parra A. (1982, dentro de la línea de investigación "Secado y almacenamiento de Productos Agrícolas". La metodología se basa en la técnica de simulación matemática, mediante la cual es posible predecir simultáneamente, la variación meteorológica, el proceso de secado y el proceso de deterioración del producto, con el fin de optimizar el manejo y funcionamiento de sistemas de secado solar y natural. El modelo de simulación se compone de: el modelo de secado natural desarrollado por Roa (1974, el modelo de deterioro desarrollado por Ospina (1979 y de una rutina de interpolación polinomial que permite obtener la carga máxima de yuca (Kg/m2 que se puede secar sin que se deteriore más del 15%.

  9. Solar UVR-induced DNA damage and inhibition of photosynthesis in phytoplankton from Andean lakes of Argentina

    NARCIS (Netherlands)

    Villafane, VE; Buma, AGJ; Boelen, P; Helbling, EW

    2004-01-01

    During January 1999, studies were carried out in temperate lakes of the Andean region of Argentina (41degreesS, 71degreesW) to determine the short-term effects of solar ultraviolet radiation (UVR, 280-400 nm) upon natural phytoplankton assemblages. Organisms from one 'clear' (Lake Moreno) and two

  10. Implementación del secado mecánico de café en carros secadores

    Directory of Open Access Journals (Sweden)

    Oscar Buitrago Bermúdez

    1991-09-01

    Full Text Available Con el objetivo de presentar una nueva alternativa de secado a los pequeños y medianos ceficultores, se desarrolló un secador mecánico de capa fija, a partir de un secador solar de tradicional uso en la zona cafetera denominado carro secador, el cual consta de dos a cuatro plataformas de secado, un entramado de soporte y desplazamiento de las plataformas y un techo de teja de zinc para resguardarlas en caso de lluvia. Se hicieron las modificaciones necesarias para convertir el carro secador en un secador mecánico, se tuvo en cuenta que el secador pudiera seguirse usando como secador solar, se realizaron seis pruebas de secado, en las cuales se midieron variables del grano, del aire y del secador. La uniformidad del contenido de humedad final del grano se determinó comparando muestras tomadas en las plataformas y después de empacado el grano. De la evaluación del equipo se hicieron las siguientes deducciones: - Cada una de las partes acondicionadas al carro funcionaron satisfactoriamente. No se presentaron fugas de aire caliente. - El consumo de combustible del quemador de olla fue 0.239 y 0.275 L. kg café pergamino seco (c.p.s.. - El caudal de aire aumentó al final del secado alrededor del 90%, debido a la disminución continua del espesor de la capa de grano. - Los consumos energéticos del secador estuvieron 4500 y 7000 kJ.kg c.p.s. - El contenido de humedad final del grano fue uniforme, con coeficientes de variación cercanos al 10%.

  11. Cinética del secado de tomillo

    OpenAIRE

    Rocha,Ronicely P. da; Melo,Evandro de C.; Corbín,José B.; Berbert,Pedro A.; Donzeles,Sérgio M. L.; Tabar,Jon A.

    2012-01-01

    Los objetivos del trabajo fueran estudiar la cinética del secado de tomillo con posterior ajuste de diferentes modelos matemáticos a los datos experimentales y determinar los valores de la difusividad efectiva y energía de activación. Para el desarrollo del experimento de secado fueran utilizadas las temperaturas 30, 40, 50, 60 y 70 oC. El diseño experimental fue de bloques completamente aleatorizados, con tres repeticiones. Para el ajuste de los modelos matemáticos a los datos experimentales...

  12. Selection of astrophysical/astronomical/solar sites at the Argentina East Andes range taking into account atmospheric components

    Czech Academy of Sciences Publication Activity Database

    Piacentini, R.D.; García, B.; Micheletti, M.I.; Salum, G.; Freire, M.; Maya, J.; Mancilla, A.; Crinó, E.; Mandát, Dušan; Pech, M.; Bulik, T.

    2016-01-01

    Roč. 57, č. 12 (2016), s. 2559-2574 ISSN 0273-1177 R&D Projects: GA MŠk(CZ) 7AMB14AR005; GA MŠk LE13012; GA MŠk LG14019; GA MŠk LM2015046 Institutional support: RVO:68378271 Keywords : astrophysical * astronomical * solar: sites * Argentina -Andes: atmospheric components Subject RIV: BN - Astronomy, Celestial Mechanics, Astrophysics Impact factor: 1.401, year: 2016

  13. Development and evaluation of neural network models to estimate daily solar radiation at Córdoba, Argentina

    International Nuclear Information System (INIS)

    Bocco, M.

    2006-01-01

    The objective of this work was to develop neural network models of backpropagation type to estimate solar radiation based on extraterrestrial radiation data, daily temperature range, precipitation, cloudiness and relative sunshine duration. Data from Córdoba, Argentina, were used for development and validation. The behaviour and adjustment between values observed and estimates obtained by neural networks for different combinations of input were assessed. These estimations showed root mean square error between 3.15 and 3.88 MJ m -2 d -1 . The latter corresponds to the model that calculates radiation using only precipitation and daily temperature range. In all models, results show good adjustment to seasonal solar radiation. These results allow inferring the adequate performance and pertinence of this methodology to estimate complex phenomena, such as solar radiation [pt

  14. Diseño, desarrollo y desempeño de un secador solar para el secado de frutos de piña (Ananas comosus (L. Merr., mamey (Mammea americana L. y banano (Musa paradisiaca L.

    Directory of Open Access Journals (Sweden)

    Edgar Ruperto Macías-Ganchozo

    2018-01-01

    Full Text Available El objetivo de la presente investigación fue el de conocer la vida útil de frutas tropicales deshidratadas basado en un secador solar que fue diseñado y desarrollado bajo las condiciones de Calceta, cantón Bolívar de la provincia Manabí, Ecuador. Debido a las características físicas y químicas del banano, exhibidas durante el proceso de deshidratación por radiación, se contó con resultados satisfactorios, superiores a los obtenidos en frutos de mamey y piña. Por ejemplo, la humedad en banano con 80.22% bajó a 10.35%; en lo referente a la relación de proteína aumentó desde 1.27% en su estado fresco a 2.18% y en contenidos de fibras desde 0.88% en su estado fresco a un 2.41%. Los análisis microbiológicos determinaron la vida útil de los productos estimándose en 106, 109 y 174 días respectivamente para mamey, banano y piña. En cuanto a los atributos medidos según escala de la evaluación sensorial, la media de los tratamientos y sus propiedades, como dulce, aspecto, color y sabor, se puede demostrar que el banano contempla mejores atributos como color con 4.38; dulce 4.58; aspecto 4.68; y sabor 4.75. En banano, el estadístico R2 indica un 56.339% de la variabilidad en DM PL. El coeficiente de correlación es igual a 0.750593, indicando una relación moderadamente fuerte entre las variables.

  15. Secado de café en lecho fluidizado

    Directory of Open Access Journals (Sweden)

    Elkin Mauricio López Fontal

    2006-01-01

    Full Text Available Todo el café se cosecha en grano cereza, el cual se beneficia en forma tradicional o aplicando el método Becolsub o de beneficio ecológico. Una vez lavado el café pergamino obtenido, se seca en forma natural o mecánicamente. Los secadores mecánicos más utilizados son de tipo estático, en los cuales generalmente se presentan problemas de desuniformidad en el contenido de humedad final del grano, la cual debe oscilar entre 10 y 12% b.h. En el presente trabalo de investigación se empleó el sistema de secado mediante fluidización, el cual convierte un lecho de partIculas sólidas en una masa suspendida y expandida que posee muchas de las propiedades de un lIquido. Se diseno y construyó un prototipo de 5.000 g de capacidad, en el cual se secó café balo tres condiciones de temperatura del aire de secado: 42, 46 y 49°C. El tiempo de secado varió de 6 a 8 horas. Se obtuvo una buena uniformidad en el contenido de humedad final del grano, con diferencias menores a 0.86%. Además al grano se le hizo prueba de taza, obteniéndose que el producto presenta caracterIsticas organolépticas de buena calidad.

  16. Solar energy in Argentina: A profile of renewable energy activity in its national context

    Science.gov (United States)

    Hawkins, D.

    1981-01-01

    The following subjects are covered: The country overview; the energy summary; the geopolitical, economic, and cultural aspects of the Republic of Argentina; the energy profile; and international contacts, manufacturers, and projects.

  17. Solar energy in Argentina: a profile of renewable energy activity in its national context

    Energy Technology Data Exchange (ETDEWEB)

    Hawkins, D.

    1981-01-01

    The following subjects are included: the country overview; the energy summary; the geopolitical, economic, and cultural aspects of the Republic of Argentina; the energy profile; and international contacts, manufacturers, and projects. (MHR)

  18. Cinética de secado de la levadura cervecera (Saccharomyces cerevisiae

    Directory of Open Access Journals (Sweden)

    A. Picado

    2006-01-01

    Full Text Available En este trabajo se estudió la cinética de secado de la levadura cervecera tomando en consideración el fenómeno de encogimiento presentado por la misma. Los datos experimentales se obtuvieron a tres temperaturas diferentes. Se evaluó el encogimiento volumétrico y de grosor de la levadura por medición directa determinada durante el secado. Se encontró que el encogimiento de la levadura es casi isotrópico e incide significativamente en la velocidad de secado. Además, la levadura durante el secado presenta solamente un periodo de velocidad decreciente y no exhibe curva característica de secado.

  19. Secado del orujo en lecho fluidizado-móvil

    OpenAIRE

    Torrecilla Velasco, José Santiago

    2000-01-01

    El objetivo fundamental de la presente Tesis Doctoral es validar y optimar un secadero basado en la combinación de dos tipos de contactores como son el lecho fluidizado y el móvil. Para ello se han realizado experimentos de secado de orujo empleando primero contactores por separado (fijo, móvil y fluidizado) se ha estudiado la combinación de los lechos fluidizado y móvil. Desde el punto de vista económico y de calidad del orujo seco se ha demostrado que el secadero más adecuado para realizar ...

  20. Evaluation of a integral systems greenhouse - solar dryer for small growers; Evaluacion de un sistema integral invernadero - secadero solar para pequenos productores

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, Victor O; Iriarte, Adolfo A [INENCO, Universidad Nacional de Catamarca, Catamarca (Argentina); Carabajal, Dante; Sabadzija, Gabriela; Tomalino, Luis [E.E.A. INTA, Catamarca, Catamarca (Argentina)

    2000-07-01

    Due to poor yielding capacity in the province of Catamarca, Argentina, it is necessary to improve solar drying systems in order to have a better quality final product. It is also essential to divide the costs of infrastructure with other complementary activities because of the need to make drying methods profitable. The system proposed in this work is a dryer-greenhouse with a double purposed macrotunnel greenhouse: during Winter it is used as a yielding system, and in Summer it is prepared to fulfill the functions of a solar dryer. The crops evaluated in winter were: small vegetable marrow (Curcubita maxima L), melon (Cucumis melo), ad cucumber (Cucuis sativus). Crop cycle, harvest time and tield in Kg/m were determined for each species. The assessment of the dryer was made using pepper for paprika observation of the thermal behavior of the product during drying and its final quality. The product obtained had a very good quality in color, taste and aroma with a classification of extra quality according to the Argentine Nutritional Code and the 7541 ISO Standard. Drying time decreased considerably compared to that observed in open air drying, 1995, 1996 and 1997 campaigns were economically assessed, and an evaluation of investments in five years was also conducted obtaining a positive VAN and a TIR above the cost of the best alternative for money expenditure. This integrated system is valid alternative in a sustainable production for small growers. [Spanish] Debido a las caracteristicas productivas de la Provincia de Catamarca Argentina, es necesario optimizar los procesos del secado solar teniendo en cuenta la calidad final del producto. Ademas, debido a la necesidad de rentabilizar los metodos de secado, imprescindible repartir los costos de infraestructura con otro tipo de actividad complementaria. El sistema propuesto en este trabajo es un invernadero secadero que utiliza un invernadero macrotunel que cumple una doble funcion, durante el invierno se usa como

  1. Efectos estructurales en el transporte de materia durante el secado de frutas

    OpenAIRE

    Nieto, Andrea Bibiana

    2004-01-01

    El secado comercial de frutas involucra usualmente tratamientos de presecado (escalcado y deshidratación osmótica utilizando azúcares) dirigidos ya sea a mejorar la calidad del producto final o a mejorar la cinética de secado. La literatura sobre el efecto de estos tratamientos en la velocidad de transporte de humedad durante el secado convencional es aparentemente contradictoria. Ello puede atribuirse a la complejidad del proceso simultáneo de transferencia de calor y de masa durante el seca...

  2. El proceso de secado por atomización: formación de gránulos y cinética de secado de gotas

    Directory of Open Access Journals (Sweden)

    Mondragón, Rosa

    2013-08-01

    Full Text Available Spray drying is a unit operation very common in many industrial processes. For each particular application, the resulting granulated material must possess determined properties that depend on the conditions in which the spray drying processing has been carried out, and whose dependence must be known in order to optimize the quality of the material obtained. The large number of variables that influence on the processes of matter and energy transfer and on the formation of granular material has required a detailed analysis of the drying process. Over the years there have been many studies on the spray drying processing of all kind of materials and the influence of process variables on the drying kinetics of the granulated material properties obtained. This article lists the most important works published for both the spray drying processing and the drying of individual droplets, as well as studies aimed at modeling the drying kinetics of drops.El proceso de secado por atomización es una operación unitaria que interviene en numerosas aplicaciones industriales. Para cada aplicación en concreto, el material granulado resultante debe poseer unas propiedades determinadas que dependen de las condiciones en las que se lleve a cabo el secado por atomización, y cuya dependencia debe conocerse para así optimizar la calidad del material obtenido. El gran número de variables que influyen en los procesos de transferencia de materia y energía que tienen lugar, y en la formación del material granulado, han hecho necesario el análisis en detalle del proceso de secado. A lo largo de los años han sido muchos los estudios realizados sobre el secado por atomización y la influencia de las variables del proceso en la cinética de secado y las propiedades del material granulado obtenido, para todo tipo de materiales. En este artículo se recogen los trabajos más importantes publicados correspondientes tanto al secado por atomización como al secado de gotas

  3. Solar radiation in forested urban environments with dry climate. Case: Metropolitan Area of Mendoza, Argentina

    Directory of Open Access Journals (Sweden)

    Mariela Edith Arboit

    2014-12-01

    Full Text Available The aim of this work is to advance the understanding of the solar potential of urban residential environments which, by their morphology, and the impact of urban trees, present values of irradiance very different from full solar collection. Morphological variables of urban settings and urban trees, a very distinctive feature of the Mendoza Metropolitan Area (MMA, have a fundamental impact on the feasibility of implementing strategies for solar energy utilization in urban environments. The results achieved will contribute to modify and gradually update urban and building legislation to implement higher levels of energy efficiency and minimum environmental impacts.This work proposes to study the potential of solar collection in urban environments, analyzing eleven urban configurations selected according to their building and urban morphological characteristics.Methodologically, we have monitored the global solar irradiance on vertical plane on northern facades, completely sunny and partly sunny, affected by solid masking and arboreal masking. Results obtained so far indicate that solar masking is critical for vertical surfaces, with a reduction of the available solar energy between 2% and 66% in the winter season. However, these drawbacks caused by urban trees are compensated by benefits in the warm season: controlling the intensity of the urban heat island, absorption of pollutants, cooling and humidifying the air through evapotranspiration, reducing thermal loads of buildings, occupancy of public open spaces, and an invaluable contribution to the urban aesthetic.

  4. Assessing the solar potential of low-density urban environments in Andean cities with desert climates: The case of the city of Mendoza, in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Arboit, M.; Fernandez Llano, J.C.; Rosa, C. de [Instituto de Ciencias Humanas, Sociales y Ambientales (INCIHUSA - CONICET), R and D Unit, Laboratorio de Ambiente Humano y Vivienda (LAHV), Adrian Ruiz Leal s/n, Parque General San Martin 5500, Mendoza (Argentina); Diblasi, A. [Facultad de Ciencias Economicas, UNCuyo, Centro Universitario (5500) Mendoza (Argentina)

    2008-08-15

    Energy use in the built environment is globally recognized as a key issue for sustainable urban development. In tempered-cold arid regions with a generous solar resource, adequate design and technology can substantially reduce the energy demand for space and water heating in urban buildings. This study assessed the solar potential of low-density urban environments in the city of Mendoza, Argentina. The results of the study will be used to develop technical guidelines for urban and energy planning agencies and professionals involved in the production of habitat. The study included the following successive steps: (i) selection of a representative sample of analysis units (city blocks); (ii) selection of a series of urban and building variables; (iii) definition of indicators accounting for solar masking, building's potential use of the solar radiation on the whole urban area, and availability of adequate collecting areas to satisfy high percentages of the energy demand in low-density urban environments; and (iv) insolation of potential collectors simulated by a graphic-computational model developed in the R and D unit. Only the results for solar space heating are presented in this paper. The results, direct and statistical, indicate that it is technically feasible to meet the target solar fractions. At the same time, by means of the solar recycling of existing building stocks, it is possible to considerably reduce the environmental impacts due to the extraction of materials from, and the disposal of solid wastes into, the ecosystem. (author)

  5. MODELO CINÉTICO DEL SECADO DE LA PULPA DE MANGO

    Directory of Open Access Journals (Sweden)

    Aquiles Ocampo

    Full Text Available El propósito de este trabajo fue encontrar un modelo que permitiera predecir el tiempo de secado de la pulpa de mango (Mangifera indica con diferentes condiciones de temperatura. Se construyó un secador de laboratorio en el que se llevaron a cabo pruebas de secado a temperaturas de 55 °C, 60 °C y 65 °C, con una velocidad de aire constante de 2,0 m/s y una humedad relativa controlada de 50%. Se presenta un procedimiento sencillo que convierte el modelo de GAB en una ecuación polinomial de segundo orden. Igualmente, se muestra una manera simple aplicable a procesos similares de secado para establecer su cinética a partir de modelos simplificados de la ecuación clásica de Fick.

  6. Velocidad de secado en pilas de mena laterítica almacenadas a la intemperie

    Directory of Open Access Journals (Sweden)

    Yoalbys Retirado-Mediaceja

    2015-10-01

    Full Text Available En este trabajo se establece, a partir del balance de energía térmica y el análisis de la transferencia de calor y masa en el secado natural, el modelo matemático para el cálculo y la simulación de la velocidad de secado en pilas de mena laterítica almacenadas a la intemperie, en la empresa productora de níquel y cobalto Comandante Ernesto Che Guevara de Moa. Las simulaciones evidenciaron que la velocidad de secado en las pilas fue, generalmente, inferior a 0,05 %/h y nula en determinados horarios de la mañana y la tarde en los taludes oeste y este, respectivamente.

  7. Parámetros de Transferencia de Materia en el Secado de Frutas Mass Transfer Parameters in Fruit Drying

    OpenAIRE

    Sebastião R Ferreira; Antônio R. S Costa

    2009-01-01

    Se desarrolló un modelo analítico para obtención de parámetros de transferencia de materia en el secado de frutas. El modelo considera la disminución del radio de las frutas durante el proceso de secado. Con el modelo matemático se predice simultánemente el coeficiente externo de transferencia de materia k m y la difusividad de agua en los frutos D AB. Para probar el modelo se obtuvo en forma expermental datos de masa de agua M A en la fruta versus el tiempo de secado t, además del radio inic...

  8. Comportamiento temporal de la radiación solar global en la ciudad de Bahía Blanca, Argentina

    Directory of Open Access Journals (Sweden)

    María Eugenia Fernández

    2015-08-01

    Full Text Available La energía que irradia el Sol es la principal causa de las diferencias climáticas en nuestro planeta y sustenta todos los procesos vitales. Si bien dicha emisión es prácticamente constante para escalas temporales breves, la radiación incidente en cada sitio es variable y depende en gran medida de los estados atmosféricos. En este sentido, la cantidad de cielo cubierto por nubes es un factor primordial, ya que por su capacidad de absorción y reflexión estas pueden reducir sustancialmente la radiación que alcanza la superficie terrestre. El objetivo del presente trabajo es caracterizar el comportamiento de la radiación solar global en la ciudad de Bahía Blanca (Argentina para el período 2001-2011 y comparar los valores radiativos registrados en los años 2007-2011 con datos referidos a coberturas nubosas a fin de establecer relaciones entre ambas variables. La radiación promedio para el intervalo analizado fue de 187,36 W/m 2 . En enero y en diciembre todos los días se registraron radiaciones mayores a 227,4 W/m 2 y en junio y julio la radiación siempre osciló entre 51,5 W/m 2 y 110,1 W/m 2 . En el transcurso del día la radiación alcanza su máximo valor entre las 13:00 h y 13:30 h. En lo que respecta a la relación entre la cobertura nubosa y la radiación global se observaron reducciones de hasta un 10,86 % entre cielos despejados (0 octas y parcialmente nublados (1-5 octas y de hasta 44,35 % entre cielos despejados y cubiertos (6-8 octas. En término medio, los días claros reciben alrededor de un 16 % más de radiación que todos los días en conjunto.

  9. Assessing the solar potential of low-density urban environments in Andean cities with desert climates: The case of the city of Mendoza, in Argentina. 2nd. Part

    Energy Technology Data Exchange (ETDEWEB)

    Arboit, M.; Mesa, A.; Fernandez Llano, J.C.; de Rosa, C. [Instituto de Ciencias Humanas, Sociales y Ambientales. (INCIHUSA - CONICET), R+D Unit: Laboratorio de Ambiente Humano y Vivienda, Adrian Ruiz Leal s/n. Parque General San Martin. (5500) Mendoza (Argentina); Diblasi, A. [Facultad de Ciencias Economicas, UNCuyo. Area Ciencias Exactas,(CRICYT - CONICET), Adrian Ruiz Leal s/n. Parque General San Martin. (5500) Mendoza (Argentina)

    2010-07-15

    Energy use in the built environment is globally recognized as a key issue for sustainable urban development. In temperate-cold arid regions with a generous solar resource, such as those of western Argentina, adequate design and technology can substantially reduce the energy demand for space and water heating in urban buildings. The solar potential of low-density residential urban areas in the city of Mendoza's Metropolitan Area (MMA), has been studied earlier in this research. Several indicators of the solar potential were elaborated. They provide necessary information when planning and designing new urban structures or refurbishing existing ones. However, a more direct indicator, relating the available solar radiation during a heating season to the space volume to be heated, the Volumetric Insolation Factor (VIF), seems to be of most practical use as far as contributing a helpful evaluation indicator, to the above mentioned design processes. The present study follows the methodological steps used in the former research, evaluating comparatively the results of a Graphic-Computational Model and a Multiple Linear Regression Statistical Model. As in the earlier study, the good fit of both models' results clearly point at the reliability of the statistical procedure and its valuable contribution of a simplified calculation tool as its by-product. (author)

  10. Secado de jugos en la industria azucarera como alternativa de diversificación sostenible

    OpenAIRE

    Felipe Campo; Angela O. Díaz; Yoel Hernández; Dayami Borges

    2010-01-01

    Se ofrece y comenta una información actualizada sobre los diferentes procesos desarrollados y equipos empleados para el secado de jugos de frutas y de caña. Se hace énfasis en este último y en el empleo de sistemas de secado por gas-suspensión, por constituir estos procesos una simplificación tecnológica del proceso tradicional de producción de azúcar. Se disminuye el número de etapas, equipos, los consumos y el tiempo de duración. Se elimina el empleo de productos químicos y la obtención de ...

  11. Secado de primeras materias cerámicas por atomización

    OpenAIRE

    Editorial, Equipo

    2016-01-01

    El secado por atomización consiste en inyectar una suspensión de arcilla, de pasta o de cualquier otra materia, en aire seco y caliente. El agua se evapora y las partículas, totalmente secas o con el contenido deseado en humedad, se separan de la corriente de aire. Este proceso es muy adecuado para la preparación de pastas para prensado en seco.

  12. Energy optimization in industrial drying systems; Optimizacion energetica en sistemas de secado industrial

    Energy Technology Data Exchange (ETDEWEB)

    Alarcon, Daniel; Ambriz, Juan Jose; Romero Paredes, Hernando [Universidad Autonoma Metropolitana-Iztapalapa, Mexico, D. F. (Mexico)

    1994-12-31

    The drying of products -meaning the extraction of water or excess humidity down to adequate levels for its conservation and final presentation- demands a large amount of energy, mainly from fuels of fossil origin. Nevertheless, from the standpoint of the energy efficiency, the burning of fuels at very high temperature for using them at a very low temperature, represents an astonishing energy waste, which can be clearly established by means of an energy and exergy balance of these drying installations. In this study the methodology for the energy analysis for industrial drying systems is presented and it is applied to different practical cases. The efficiency of the entire system is evaluated and the losses for each concept, in order to obtain the potential energy saving. [Espanol] El secado de productos, entendido como la extraccion de agua o humedad en exceso, hasta niveles adecuados para su conservacion o presentacion final, demanda una gran cantidad de energeticos, principalmente de origen fosil. No obstante, desde el punto de vista de la eficiencia energetica, el quemar combustible a muy alta temperatura para emplearlos a una muy baja, representa un dispendio energetico impresionante, lo cual puede ser claramente establecido mediante el balance energetico y exergetico de dichas instalaciones de secado. En el presente estudio se presenta la metodologia de analisis energetico de sistemas industriales de secado y se aplica a distintos casos practicos. Se evalua la eficiencia total del sistema y las perdidas por cada concepto con la finalidad de obtener los potenciales de ahorro de energia.

  13. GRADO DE SECADO Y EFICIENCIA TÉRMICA DE UN SECADOR DE TORNILLO TRANSPORTADOR DRYING

    Directory of Open Access Journals (Sweden)

    MANUEL ALEJANDRO TRIANA

    2011-01-01

    Full Text Available En un secador tipo tornillo transportador (SCD, se evaluó el grado de secado y la eficiencia térmica en el secado de acetato de calcio dihidratado. El SCD tiene 8.66 m de longitud y 0.17 m de diámetro del tornillo. Las variables del diseño factorial (niveles mixtos 2x3 2 fueron: la velocidad rotacional del tornillo (N en dos niveles, la temperatura (T del sólido alimentado en tres niveles y el flujo de alimentación (C en tres niveles. Durante los experimentos la humedad inicial del sólido estuvo entre 5070%, obteniéndose grados de secado hasta del 14 % y eficiencias térmicas hasta del 88%. A partir de las superficies de respuesta de los anovas obtenidos en StatGraphics 5.1, se realizó la optimización simultánea de las dos variables de respuesta. Usando el concepto de diseño desbalanceado se encontró el óptimo global (45 ºC, 8 L/min y 3 rpm, que coincide con el óptimo observado.

  14. Development and evaluation of neural network models to estimate daily solar radiation at Córdoba, Argentina Desenvolvimento e avaliação de modelos de redes neurais para estimação da irradiação solar diária em Córdoba, Argentina

    Directory of Open Access Journals (Sweden)

    Mónica Bocco

    2006-02-01

    Full Text Available The objective of this work was to develop neural network models of backpropagation type to estimate solar radiation based on extraterrestrial radiation data, daily temperature range, precipitation, cloudiness and relative sunshine duration. Data from Córdoba, Argentina, were used for development and validation. The behaviour and adjustment between values observed and estimates obtained by neural networks for different combinations of input were assessed. These estimations showed root mean square error between 3.15 and 3.88 MJ m-2 d-1 . The latter corresponds to the model that calculates radiation using only precipitation and daily temperature range. In all models, results show good adjustment to seasonal solar radiation. These results allow inferring the adequate performance and pertinence of this methodology to estimate complex phenomena, such as solar radiation.O objetivo deste trabalho foi desenvolver modelos de redes neuronais, do tipo retropropagação, para a estimação da irradiação solar, a partir de dados de irradiação solar extraterrestre, amplitude térmica, precipitação, nebulosidade e razão de insolação. O treinamento e a validação foram realizados com dados correspondentes a Córdoba, Argentina. O comportamento e ajuste entre os valores observados e os estimados pelas redes foram avaliados para diferentes combinações das variáveis de entrada, que apresentaram valores do erro quadrático médio entre 3,15 e 3,88 MJ m-2 d-1 . Este último valor corresponde ao modelo que calcula a irradiação somente utilizando precipitação e amplitude térmica diária. Os resultados exibem em todos os modelos um ajuste apropriado ao comportamento sazonal da irradiação solar e permitem concluir a pertinência e o adequado desempenho desse método para estimar fenômenos complexos como a irradiação solar.

  15. Sistemas de lógica difusa en el proceso de secado de café en lecho fluidizado

    Directory of Open Access Journals (Sweden)

    Elkin Mauricio López Fontal

    2005-09-01

    Full Text Available En el presente trabalo de investigación se experimenta con un sistema de secado de granos en lecho fluidizado. Se utiliza un prototipo en el cual se seca café utilizando varias temperaturas del aire de secado (López, 2002. Los resultados obtenidos muestran que el tiempo de secado varIa entre 6 a 8 horas, el contenido de humedad final del grano presenta uniformidad y en prueba de tasa se obtiene un producto con caracterIsticas organolépticas de buena calidad. Como complemento a lo anterior y teniendo en cuenta el grado de incertidumbre de dicho proceso, median- te sistemas de lógica difusa se plantean en forma preliminar algunas posibles estrategias de control y automatización que presenta el proceso de secado de café en lecho fluidizado, relacionadas con: establecer el punto de fluidización de los granos hümedos, control de la velocidad superficial del aire, y usar al inicio del proceso de secado una temperatura de aire mayor de 50°C .

  16. Distribución de temperatura en pilas de mena laterítica expuestas a secado natural

    Directory of Open Access Journals (Sweden)

    Yoalbys Retirado-Mediaceja

    2014-03-01

    Full Text Available En la empresa productora de níquel y cobalto “Comandante Ernesto Che Guevara” de Moa la mena laterítica se expone, en pilas triangulares, al secado natural. Sin embargo, son imprecisos los métodos de cálculo actualmente empleados en la estimación de los parámetros del secado. En este trabajo se estableció, a partir del análisis físico-matemático del secado natural, el modelo matemático para calcular y simular la distribución de temperatura en la mena laterítica durante el secado. Las simulaciones evidencian que la laterita es mala conductora del calor, y que el intercambio térmico por conducción en las pilas es un fenómeno superficial que no incide significativamente más allá de los 9,7 cm de la superficie de secado

  17. Thermodynamic methodology for the design of solar dryers operated with flat solar collectors; Metodologia termodinamica para el diseno de secadores operados con calentadores solares planos

    Energy Technology Data Exchange (ETDEWEB)

    Torres Reyes, Ernestina; Navarrete Gonzalez, Jose L; Ibarra Salazar, Beatriz A; Picon Nunez, Martin [Instituto de Investigaciones Cientificas, Universidad de Guanajuato, Guanjuato, Guanajuato (Mexico)

    2000-07-01

    In this paper a thermal performance analysis of solar drying process at operating varying conditions is presented. It is described semi-empirical models to thermal characterization of an experimental device. A simulator of thermal performance for operating varying conditions was developed as a part of the procedure of thermal design of solar dryers. On the other hand, it is described a simplified method to design solar collectors based on the determination of minimum entropy generation during the thermal conversion of the solar device by using the thermal analysis procedure established and the method derived of the second law of the Thermodynamics are finally presented. [Spanish] En este trabajo se presenta el analisis termico del comportamiento del sistema -colector solar camara de secado-. Se describen los modelos semi-empiricos con los que se caracterizo termicamente un secador solar experimental del tipo indirecto. Se presenta tambien un procedimiento de diseno de equipo de secado que toma en cuenta las condiciones variables de operacion que presentan los dispositivos solares. Por otro lado se describe un procedimiento simplificado de diseno, basado en un analisis derivado de la segunda ley de la Termodinamica. Esta metodologia se fundamenta en la minima generacion de entropia durante la conversion termica de la energia solar, utilizando colectores solares planos. Finalmente se presentan los resultados del diseno preliminar de equipo de secado utilizando los dos procedimientos mencionados.

  18. Temperatura y humedad relativas en un secador solar de plantas para la salud

    Directory of Open Access Journals (Sweden)

    Diego Chaverri

    2016-03-01

    Full Text Available Se describen las características de un secador solar pasivo, tipo invernadero, que se utiliza para el secado de plantas para la salud en la zona norte de Costa Rica. Se analiza el régimen de temperaturas en función de la radiación solar global recibida durante el proceso de secado. También se analiza el comportamiento de la humedad relativa interna comparada con la humedad relativa ambiente y su relación con las características físicas del secador. El secador presenta características que le permiten mantener un régimen de secado para las plantas.

  19. Secado de lúcuma (Pouteria obovata) empleando la técnica de Ventana RefractanteTM

    OpenAIRE

    Diego Gamboa; Deiner Ibáñez; Marcela Meléndez; Edgar Paredes; Raúl Siche

    2014-01-01

    La lúcuma es una fruta que experimenta una tendencia creciente a nivel comercial en forma de harina para su empleo en la industria alimentaria. Este estudio tuvo como objetivo obtener harina de lúcuma utilizando el método de secado por ventana refractante y evaluar el efecto del espesor de la pulpa de lúcuma y el tiempo de secado en la humedad y el color de la harina. Fue utilizado un Diseño Compuesto Central Rotable (DCCR) con el tiempo entre 10 y 50 min y el espesor entre 1 y 3 mm. Se emple...

  20. SECADO DE UCHUVA (Physalis peruviana L) POR AIRE CALIENTE CON PRETRATAMIENTO DE OSMODESHIDRATACIÓN

    OpenAIRE

    CASTRO, Adriana M; RODRÍGUEZ, Ligia; VARGAS, Edgar M

    2008-01-01

    En este trabajo se determinan las condiciones de temperatura más favorables para un proceso de secado de uchuva (Physalis peruviana L) con aire caliente, con deshidratación osmótica (DO) como pretratamiento, utilizando una solución de sacarosa de 70o Brix a 40oC durante 16 horas. Se realiza un seguimiento de la degradación de β-caroteno con el tiempo y la temperatura. En la fruta tratada con aire caliente a 60oC y pretratada con DO, se obtiene una pérdida total de β-caroteno del 98%. La fruta...

  1. Comparative 25-OH-vitamin D level in institutionalized women older than 65 years from two cities in Spain and Argentina having a similar solar radiation index.

    Science.gov (United States)

    Portela, María Luz Pita Martin; Mónico, Amália; Barahona, Antonieta; Dupraz, Hernan; Sol Gonzales-Chaves, Macarena Maria; Zeni, Susana Noemi

    2010-03-01

    The present study evaluated and compared vitamin D nutritional status and calcium-phosphorus metabolism in institutionalized women >65 y from two cities that have a similar sun irradiation index (heliophany). The study was carried out in women living in similar social-status institutions from geographic cities having a similar solar radiation index (Lleida, Spain, n=49, and suburban Buenos Aires, Argentina [BA], n=48) at the end of summer. Fish consumption was higher in the Lleida group, as was red-meat consumption in the BA group. In both groups mean calcium intake was 800 mg/d. The daily intake of vitamin D was higher in the BA group (P100 pg/mL were found in 24% and 20% of women in Lleida and BA, respectively. There was a marked increase in carboxy-terminal telopeptide cross-links of type I collagen levels and a decrease in 25OHD with an increase in PTH levels (Pbone alkaline phosphatase increased significantly only when the PTH concentration duplicated the reference range. Even at the end of summer, vitamin D deficiency/insufficiency was prevalent in the two studied institutionalized elderly women. In the narrow range of the dietary calcium intake (close to 800 mg/d) of both studied groups, secondary hyperparathyroidism was absent when 25OHD levels were >17 ng/dL, indicating changes in the regulation control of serum PTH and consequently the changes in this threshold. As a result, vitamin D deficiency must be reversed to avoid the increment in bone turnover and to ensure the endocrine and paracrine functions of vitamin D for overall health and well-being. Copyright (c) 2010 Elsevier Inc. All rights reserved.

  2. Características de secado de nopal (Opuntia ficus-indica por lecho fluidizado Características de secado de nopal (Opuntia ficus-indica por lecho fluidizado

    Directory of Open Access Journals (Sweden)

    Melva López Orozco

    2012-02-01

    Full Text Available Se investigó el efecto del escaldado y la temperatura del aire de secado en trozos de nopal. El experimento se realizó en un secador de lecho fluidizado a cuatro temperaturas diferentes (50 ºC, 60 ºC, 70 ºC y 80 ºC. Las curvas de secado se obtuvieron al graficar la razón de humedad adimensional (MR contra el tiempo de secado; su comportamiento se modeló utilizando los modelos de Henderson-Pabis, Potencia, Peleg y Page. Los resultados mostraron que el secado se llevó a cabo principalmente en el periodo de velocidad decreciente. Los valores de la difusividad efectiva (Def variaron de 0.818x10-7 a 3.25x10-7 m2 s-1, dependiendo de las condiciones de secado. Los valores de la energía de activación (Ea fueron de 35.85 kJ/mol para el nopal sin escaldar y 28.21 kJ/mol para el nopal escaldado, respectivamente. Se encontró que los modelos de Peleg y Page fueron los más adecuados para describir el comportamiento del secado de nopal.   The effect of blanching and drying air temperature on nopal pieces was investigated. Their drying behavior in a fluidized bed was studied at four different temperatures (50 ºC, 60 ºC, 70 ºC and 80 ºC. Drying curves were constructed using dimensionless moisture ratio (MR and time; and their behavior was modeled using Henderson-Pabis, Power, Peleg and Page models. The results indicated that drying took place mainly when the period of dry­ing rate decreased. The moisture effective diffusivity (Def values varied from 0.818x10-7 to 3.25x10-7 m2 s-1 depending on drying conditions. The activation energy (Ea values were: 35.85 kJ/mol for the nopal without blanching and 28.21 kJ/mol for the blanching nopal respectively. Peleg and Page´s models were found the most suitable for describing the dry­ing behavior of nopal.

  3. Efecto de las condiciones de secado sobre el endurecimiento de los granos de caraota (Phaseolus vulgaris pretratados con vapor

    Directory of Open Access Journals (Sweden)

    María Virginia Mujica

    2017-12-01

    Full Text Available El endurecimiento de los granos de caraota (Phaseolus vulgaris generado por el almacenamiento en condiciones de alta temperatura y humedad relativa representa una limitante importante para su consumo. El objetivo del presente trabajo fue evaluar el efecto de un tratamiento con vapor y luego secado a los granos de P. vulgaris recién cosechados en la prevención de su endurecimiento. Inicialmente, se construyeron las curvas de secado a 40; 47,5 y 55 ºC. Seguidamente, los granos se trataron con vapor por 8 min 20 s y se sometieron a un proceso de secado, bajo un diseño central compuesto cuyos factores fueron la temperatura del aire (40 y 55 ºC y el tiempo de secado (4 y 8 h. La muestra secada de cada tratamiento se dividió en 3 lotes, el primero se analizó de inmediato y los otros se almacenaron por 5 semanas bajo 2 condiciones distintas 5 ºC/34 % HR y 37 ºC/75 % HR. Las determinaciones realizadas fueron humedad, capacidad de imbibición, tiempo de cocción y actividad de la peroxidasa soluble. El tiempo de secado fue de 6,5; 5 y 2,5 h a 40; 47,5 y 55 ºC, respectivamente, para alcanzar una humedad de 13 % (b.s.. El coeficiente de difusión resultó igual a 3,40x10-9; 3,52x10-9 y 3,87x10-9 m2/s, a 40, 47,5 y 55 ºC, respectivamente. El valor de la energía de activación fue de 7,33 kJ/mol. La aplicación de vapor y posterior secado de los granos no previno su endurecimiento, y este no dependió de la actividad de la peroxidasa soluble. Por lo que se puede inferir que los compuestos fenólicos y la enzima peroxidasa no son los únicos implicados en el mecanismo de endurecimiento de los granos de P. vulgaris.

  4. Argentina; Argentine

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-04-01

    This economical study summarizes the energy situation of Argentina: energy institutions and policy, energy companies (oil, electricity, gas, coal), energy supplies (resources, power production, petroleum, natural gas), prices and tariffs, consumption, economical stakes and perspectives (investments, agreements, projects). Energy data for the 1971-1999 period are summarized in graphs and tables. (J.S.)

  5. Retención de aroma durante el secado de extracto de café en un sistema cerrado

    Directory of Open Access Journals (Sweden)

    J.F. Vílchez

    2006-01-01

    Full Text Available Durante el secado de alimentos líquidos, componentes volátiles presentes en baja concentración que contribuyen al aroma y sabor del producto final son removidos junto con el agua. En consecuencia la calidad del producto final es considerablemente afectada por la cantidad de substancias volátiles que son retenidas durante el proceso de secado. En el extracto de café, por ejemplo, existen cientos de tales compuestos, la mayoría de ellos altamente volátiles por lo que se pierden cuando el extracto es transformado en polvo seco. Independientemente del método utilizado, parece ser imposible evitar completamente la perdida de compuestos volátiles durante el secado. Un método potencial para mejorar la retención del aroma durante el secado es utilizar un sistema que trabaje a ciclo cerrado. Con el propósito de estudiar este proceso una planta piloto que consiste de un secador por aspersión, un secador de lecho fluidizado vibratorio, un sistema de recuperación de vapores e intercambiadores de calor para recalentar el aire reciclado ha sido diseñada y esta en la fase final de instalación en la Facultad de Ingeniería Química de la Universidad Nacional de Ingeniería, en Managua, para hacer un estudio del método potencial de recuperación de aroma del extracto de café. Este estudio tendrá como resultado no solo un café soluble de mejor calidad sino que además un método capaz de mejorar el procesamiento de muchos otros alimentos líquidos.

  6. Cinética del secado de tomillo Drying kinetics of thyme

    Directory of Open Access Journals (Sweden)

    Ronicely P. da Rocha

    2012-06-01

    Full Text Available Los objetivos del trabajo fueran estudiar la cinética del secado de tomillo con posterior ajuste de diferentes modelos matemáticos a los datos experimentales y determinar los valores de la difusividad efectiva y energía de activación. Para el desarrollo del experimento de secado fueran utilizadas las temperaturas 30, 40, 50, 60 y 70 oC. El diseño experimental fue de bloques completamente aleatorizados, con tres repeticiones. Para el ajuste de los modelos matemáticos a los datos experimentales fue realizado el análisis de regresión no lineal, por el método Simplex-Quasi-Newton. Los resultados mostraron que el modelo matemático de Page obtuve un mejor ajuste a los datos experimentales, los valores de los coeficientes de difusividad efectiva variaron entre 3,69 x 10-12 e 1,19 x 10-10 m² s-1 y el valor de la energía de activación fue de 77,16 kJ mol-1.This work aimed to study the drying kinetics of thyme and subsequent adjustment of different mathematical models to the experimental data and to determine the effective diffusivity and the activation energy. In order to conduct the experiment the temperatures of 30, 40, 50, 60, 70 ºC were used. The experimental design employed was in randomized blocks with three repetitions. For the adjustment of the mathematical models to the experimental data non-linear regression was performed using Simplex-Quasi-Newton method. The results showed that the Page model was the one that promoted the best fit of the experimental data to describe the drying kinetics of the thyme leaves. The values of effective diffusivity coefficients ranged between 3.69 x 10-12 and 1.19 x 10-10 m² s-1 and the value of activation was 77.16 kJ mol-1.

  7. MODELADO DE LA CINÉTICA DE SECADO DE MANGO PRE-TRATADAS CON DESHIDRATACIÓN OSMÓTICA Y MICROONDAS

    Directory of Open Access Journals (Sweden)

    MARIBEL GARCÍA-PATERNINA

    Full Text Available La aplicación de tecnologías complementarias como la deshidratación osmótica y microondas como pre-tratamientos al secado convencional contribuye al desarrollo de nuevos productos y favorece la disminución de los cambios físico-químicos y organolépticos en el mango. El objetivo del trabajo fue evaluar el efecto de la deshidratación osmótica con una solución a 65°Brix de 37 a 40°C por 60 min, tratamiento con microondas a 560 W por 7 min y combinado como pre-tratamientos al secado de hojuelas de mango a 70°C en una estufa tipo bandeja y al sol. Las muestras de mango con 11 a 14°Brix y humedad del 80% fueron dimensionadas a 1x1x0,4 cm. La pérdida de peso y el tiempo de secado en los pre-tratados presentaron diferencias significativas (p0,99 se ajustó para el secado sin pre-tratamiento y el modelo de Vermet et al. (R²>0,99 para los pre-tratados. La De ff para microondas y secado en estufa fue mayor. Las hojuelas de mango pre-tratadas con deshidratación osmótica fueron las que mejor conservaron la apariencia de las hojuelas de mango

  8. Diseño e implementación de una estrategia de control predictivo para el secado de arroz paddy

    Directory of Open Access Journals (Sweden)

    Alfonso Cubillos Varela

    2010-01-01

    Full Text Available Este artículo trata sobre la modelación y control del proceso de secado de arroz Paddy en silo inclinado usando técnicas de control predictivo. Para esto se usa un secador a escala 1,10 con capacidad de 25 kilos de grano, totalmente instrumentado donde se puede medir en línea la temperatura y humedad del grano de arroz y del medio ambiente. Además, permite medir y manipular el flujo y temperatura del aire de secado. Con el fin de diseñar el controlador, primero se obtiene un modelo dinámico basado en el principio de capa delgada, luego se diseña e implementa la estrategia de control predictivo, conocida como DMC (Dynamic Matriz Control la cual utiliza la respuesta paso y repuesta libre del sistema para calcular la acción de control óptima. Como consecuencia de este proceso se obtienen resultados prometedores del uso de este tipo de tecnología en el secado de arroz Paddy, a reducción del tiempo de secado, b evitar la pérdida de masa por sobresecado, c garantizar un secado más homogéneo y por lo tanto una mejora en la calidad del arroz y la productividad de la industria molinera de la Región.

  9. CONSTRUCCIÓN Y VALIDACIÓN DE UN SECADOR SOLAR PARA MADERA ASERRADA

    Directory of Open Access Journals (Sweden)

    M. Fuentes-Salinas

    2003-01-01

    Full Text Available Este trabajo consistió en construir y probar un secador solar para 7.075 m3 de madera aserrada, destinado a los pequeños y medianos productores forestales. Para la construcción se utilizaron materiales disponibles en cualquier región de México y para evaluar su funcionamiento se usó madera de Pinus hartwegii de 2.54 cm de espesor, 2.50 m de largo y anchos variables. La cámara está construida tipo invernadero, con un piso de concreto, estructura metálica para soportar el colector solar, muros a base de bastidores de madera y forro de plástico, y está equipado con dos ventiladores axiales con motor de ½ HP. Para la validación se hicieron dos ensayos de secado, uno en el secador solar y otro secado al aire libre, teniendo como resultado que la madera en el secador solar se secó en el 50 % del tiempo requerido para el secado al aire libre, a un contenido de humedad final del 10 y 12 % respectivamente; además, que la calidad de la madera resultó también mejor en el secador solar. El costo de construcción del secador solar fue de $ 5,227. 25 US Dls. y se estimó un tiempo de construcción de 21 días.

  10. Cocoa Bean (Theobroma cacao L.Drying Kinetics Cinética del Secado de Cocoa (Theobroma cacao L.

    Directory of Open Access Journals (Sweden)

    Ndukwu MacManus Chinenye

    2010-12-01

    Full Text Available Cocoa (Theobroma cacao L. is widely produced in West Africa and South America and is a great economic tree crop, with so many industrial uses. In this work, the experimental drying kinetics of foreign species was investigated, and the experiments were carried out under isothermal conditions, using heated batch drier at 55, 70 and 81 ºC. The moisture ratio data obtained from change of moisture content with the drying time was fit to two thin layer drying model with good results. A faster drying process was observed at a higher drying temperature resulting in higher drying rates which is advantageous when evaluating costs. Fick’s second law of diffusion was used to predict effective diffusivity using experimental data assuming that the variation of diffusivity with temperature can be expressed by an Arrhenius type function, and the values of diffusivity obtained ranged from 6.137 x 10-10 to 2.1855 x 10-9 m2 s-1 for the temperature used. The Arrhenius constant (D is predicted at 8.64 x 10-4 m2 s-1 while the activation energy was predicted at 39.94 kJ mol-1.El cacao (Theobroma cacao L. es ampliamente producido en el Oeste de África y Sudamérica y es un cultivo de gran importancia económica, con muchos usos industriales. En este trabajo se investigó la cinética del secado experimental de especies foráneas, y se realizaron experimentos bajo condiciones isotérmicas, usando un secador discontinuo en caliente a 55, 70 y 81 °C. Los datos de relación de humedad obtenidos desde el cambio de contenido de humedad con el tiempo de secado se ajustaron a un modelo de secado de dos capas delgadas con buenos resultados. Se observó un proceso de secado más rápido a una temperatura de secado mayor resultando en mayores tasas de secado, lo que es ventajoso al evaluar costos. La segunda ley de difusión de Fick se usó para predecir difusividad efectiva usando datos experimentales, asumiendo que la variación de difusividad con la temperatura puede ser

  11. Efecto Térmico del Secado por Aspersión sobre los Metabolitos Antioxidantes de la Curuba Larga (Passiflora mollisima baley)

    OpenAIRE

    Zapata, Karol; Rojano, Benjamín A; Cortes, Farid B

    2015-01-01

    En este estudio se evalúo la capacidad antioxidante y el contenido de polifenoles del fruto de Curuba larga antes y después del secado por aspersión. El elevado contenido de agua hace de los alimentos hortofrutícolas productos perecederos y de poca vida en anaquel. Métodos de secado garantizan la estabilidad microbiológica de la fruta, aunque inducen pérdidas nutracéuticas en el producto final debido a las altas temperaturas utilizadas. Los resultados revelaron que existe un alto porcentaje d...

  12. PROPIEDADES TÉCNICO-FUNCIONALES DE LA FIBRA DIETARIA DE CÁSCARAS DE MANGO VARIEDADHILACHA (Mangifera indica L.): EFECTO DEL SECADO POR CONVECCIÓN

    OpenAIRE

    GUSTAVO ADOLFO HINCAPIÉ LL.; DIANA CAROLINA VÁSQUEZ O; VALERIA SOFÍA GALICIA M; CARLOS AUGUSTO HINCAPIÉ LL.

    2014-01-01

    Un subproducto de la obtención del jugo de mango es su cáscara; la cual contiene niveles considerables de fibra dietaria que podrían ser utilizados en la elaboración de productos alimenticios, sin embargo, actualmente no es muy aprovechado. El proceso de secado prolonga la vida útil de la cascara y permite que pueda ser adicionada a otros alimentos. En este estudio, se caracterizó fisicoquímicamente la Cáscara de Mango Hilacha (CMH) y se evaluó el efecto de cinco temperaturas de secado sobre ...

  13. Efecto de la temperatura de secado del suelo sobre la repelencia al agua en andisoles bajo cobertura de Pinus patula.

    OpenAIRE

    Jaramillo Jaramillo, Daniel Francisco

    2003-01-01

    En dos lotes con Pinus patula en la cuenca de la quebrada Piedras Blancas, con sueldos que tenían antecedentes de repelencia al agua, se llevó a cabo un muestreo intensivo: una muestra cada 5cm, a cuatro profundidades, en transectos de diferente longitud y orientación, con el fin de estudiar el comportamiento del grado de repelencia al agua, mediante el método WDPT, en condiciones de campo y de laboratorio, cuando las muestras eran sometidas a secado a 35 y 105 ºC. Se encontró que al incre...

  14. Secado de lúcuma (Pouteria obovata empleando la técnica de Ventana RefractanteTM

    Directory of Open Access Journals (Sweden)

    Diego Gamboa

    2014-01-01

    Full Text Available La lúcuma es una fruta que experimenta una tendencia creciente a nivel comercial en forma de harina para su empleo en la industria alimentaria. Este estudio tuvo como objetivo obtener harina de lúcuma utilizando el método de secado por ventana refractante y evaluar el efecto del espesor de la pulpa de lúcuma y el tiempo de secado en la humedad y el color de la harina. Fue utilizado un Diseño Compuesto Central Rotable (DCCR con el tiempo entre 10 y 50 min y el espesor entre 1 y 3 mm. Se empleó una temperatura fija de 95°C y lámina mylar (polietileno de tereftalato metalizado como película refractante de 0,1 mm. Se determinó que las condiciones ideales para obtener harina de lúcuma (9,8% de humedad con esta técnica se da cuando el espesor fue 1,3 mm y con un tiempo de 15 minutos; a estas condiciones la difusividad efectiva del agua es de 2,53E-7 m2/s.

  15. Análisis de la influencia del régimen de temperatura en el secado del mineral laterítico

    Directory of Open Access Journals (Sweden)

    Elis Efraín-Guzmán

    2003-03-01

    Full Text Available En las empresas cubanas del níquel con tecnología carbonato amoniacal (CAROM, el proceso de secado no logra los valores óptimos de humedad que garantizan la molienda. En este trabajo se determina la influencia de la humedad de equilibrio, la constante de secado y el coeficiente de transferencia de masa, durante el secado del mineral laterítico a escala de laboratorio. Se obtiene la correlación y regresión de las variables antes mencionadas en función de la temperatura y el contenido de humedad del mineral. Se confirmó experimentalmente que para un rango de temperatura entre 80 y 120 ºC, la de humedad de equilibrio del mineral laterítico se encuentra entre 0,0217 y 0,039 g /g, la constante de secado entre 0,0198 y 0,0077 1/min., y el coeficiente de transferencia de masa entre 0,0044 y 0,0116 g / m2 .min. Se concluye que el exceso de humedad en el mineral que sale de los secadores no está relacionado con el régimen de temperatura usado en el proceso

  16. Efecto de la osmodeshidratación y secado en la retención de carotenos en fruto de zapallo Effect of the osmo dehydration and drying on carotenoids retention of squash fruit

    Directory of Open Access Journals (Sweden)

    Sanín Ortiz G.

    2008-12-01

    Full Text Available El fruto de zapallo aporta provitamina A en forma de a-caroteno, b-caroteno y luteína que se pueden degradar al deshidratarlo para estabilizar la materia seca. El objetivo de la investigación fue analizar la retención de carotenos en respuesta al proceso de acondicionado por osmodeshidratación (DO con melaza pura y secado con aire caliente (AC sin exposición al sol Vs. secado a exposición parcial al sol (S. El mejor rendimiento de materia seca estable correspondió a AC con protección de eritorbato de sodio (ES y sin él en solución al 5% con 8.5 y 14 horas de permanencia en el proceso y rendimiento másico entre 99.45% y 98.5% respectivamente, que correspondió a los siguientes modelos de pérdida de sólido húmedo:Y = 454.66935e -0.2648339x r=0.965 y Y = 463.07976e-0.16167667x (r=0.978 respectivamente. El caroteno total en fruto fresco osciló entre 1114.9 y 1365.8 mg. g-1, y 222.2, 60.2 y 158.5 de a-caroteno, b-caroteno y luteína respectivamente El proceso de acondicionado de fruto de zapallo hasta materia seca estable con 12% de humedad, requiere secado con aire caliente (55°C durante nueve horas con flujo de aire de 10 m.s-1 en ausencia de brillo solar, para retener hasta 45% de carotenos totales y lograr materia prima idónea hasta con 66.8, 33.5 y 44.7 mg. g-1 de a-caroteno, b-caroteno y luteína respectivamente.The squash fruit provides provitamin A in form of alpha-carotene, beta-carotene and lutein that can be degraded when dehydrated to stabilize dry matter. The objective of the research was to analyze the carotene retention in response to the osmo dehydration conditioning process (OD with pure molasses and hot air drying (HA without sun exposure vs. partial sun exposure (S. The best stable dry matter yield corresponded to HA with and without sodium eritorbate protection (SE in 5% solution with 8.5 and 14 hours of permanence in the process and mass yield between 99.45% and 98.5% respectively, that corresponded to the

  17. Evaluación del efecto de la temperatura en el secado de polen apícola procedente de dos zonas de cundinamarca

    OpenAIRE

    BARAJAS-ORTIZ, JOHANNA PATRICIA; MARTÍNEZ, TELMO; RODRÍGUEZ-SANDOVAL, EDUARDO

    2011-01-01

    En este estudio se evalúa la influencia de la temperatura de secado (35°C y 45°C) y el origen del producto (la Calera y Zipaquirá) sobre las características físicas, químicas, y nutricionales del polen seco. Los métodos utilizados para determinar la influencia de los tratamientos son: Caracterización fisicoquímica, actividad de agua, índice de solubilidad, tamaño de partícula, contenido de vitamina C y carotenos. Los resultados confirman que el secado de polen a una temperatura de 45ºC es el ...

  18. EVALUACIÓN DEL EFECTO DE LA TEMPERATURA EN EL SECADO DE POLEN APÍCOLA PROCEDENTE DE DOS ZONAS DE CUNDINAMARCA

    OpenAIRE

    JOHANNA PATRICIA BARAJAS-ORTIZ; TELMO MARTÍNEZ; EDUARDO RODRÍGUEZ-SANDOVAL

    2011-01-01

    En este estudio se evalúa la influencia de la temperatura de secado (35°C y 45°C) y el origen del producto (la Calera y Zipaquirá) sobre las características físicas, químicas, y nutricionales del polen seco. Los métodos utilizados para determinar la influencia de los tratamientos son: Caracterización fisicoquímica, actividad de agua, índice de solubilidad, tamaño de partícula, contenido de vitamina C y carotenos. Los resultados confirman que el secado de polen a una temperatura de 45ºC es el ...

  19. Medical revolution in Argentina.

    Science.gov (United States)

    Ballarin, V L; Isoardi, R A

    2010-01-01

    The paper discusses the major Argentineans contributors, medical physicists and scientists, in medical imaging and the development of medical imaging in Argentina. The following are presented: history of medical imaging in Argentina: the pioneers; medical imaging and medical revolution; nuclear medicine imaging; ultrasound imaging; and mathematics, physics, and electronics in medical image research: a multidisciplinary endeavor.

  20. Argentina's nuclear red herring

    International Nuclear Information System (INIS)

    Perera, J.

    1983-01-01

    The article deals with Argentina's nuclear power programme over the last 30 years, including the country's efforts to be nuclear independent of the United States, as well as its aspirations to be a nuclear supplier to latin America. The latter policy on economic, rather than military grounds for nuclear weapons, has led to Argentina's decision to build a uranian enrichment plant. (U.K.)

  1. PROPIEDADES TÉCNICO-FUNCIONALES DE LA FIBRA DIETARIA DE CÁSCARAS DE MANGO VARIEDADHILACHA (Mangifera indica L.: EFECTO DEL SECADO POR CONVECCIÓN

    Directory of Open Access Journals (Sweden)

    GUSTAVO ADOLFO HINCAPIÉ LL.

    2014-06-01

    Full Text Available Un subproducto de la obtención del jugo de mango es su cáscara; la cual contiene niveles considerables de fibra dietaria que podrían ser utilizados en la elaboración de productos alimenticios, sin embargo, actualmente no es muy aprovechado. El proceso de secado prolonga la vida útil de la cascara y permite que pueda ser adicionada a otros alimentos. En este estudio, se caracterizó fisicoquímicamente la Cáscara de Mango Hilacha (CMH y se evaluó el efecto de cinco temperaturas de secado sobre las propiedades técnico-funcionales de la fibra dietaria; Capacidad de Hinchamiento (CH, Capacidad de Retención de Agua (CRA y Capacidad de Adsorción de Lípidos (CAL, características que determinan en gran medida la calidad de la fibra dietaria (FD. Los resultados obtenidos indican que la CMH tiene un contenido de fibra dietaria total, proteína, extracto etéreo, carbohidratos y fibra cruda similar al de otras variedades de mango. La cáscara de mango hilacha seca y molida (CSMH obtenida, es una promisoria fuente de FD, ya que su calidad no se vio afectada significativamente por el proceso de secado empleado en este trabajo.

  2. Sistema de secado combinado para cerámica mediante tecnología microondas para el sector de la cerámica hasta formato 1200

    Directory of Open Access Journals (Sweden)

    TECNOLOGIA,SL, BULMA

    2010-04-01

    Full Text Available New team of passage by technology microwaves for dried laminar of materials of high absorption, and dried green porcelain format until 1200 mm and thicknesses until 25 mm. It allows the elimination of water with improvement of productivity, energetic efficiency and clean technology for processed of marble, natural stone, ceramic tiles, plasters and products in bulk, without broadcasts of CO2, and respectful with the Nature, allows the dried with low degree. Project manufactured and designed totally by BULMA situated in L’Alcudia protected with national patent number P200931081.

    Nuevo equipo de pasaje por tecnología microondas para secado laminar de materiales de alta absorción,y secado de bizcocho en verde formato hasta 1200 mm y espesores hasta 25 mm. Permite la eliminación de humedad con mejora de productividad, eficiencia energética y tecnológicamente limpios para procesado de mármol, piedra natural, cerámica, escayola y productos a granel, sin emisiones de CO2, y respetuoso con el medio ambiente, permite el secado con bajos gradientes, fabricado y diseñado íntegramente por empresa valenciana BULMA situada en L’Alcudia protegido con patente nacional P200931081 y en tramite internacional.

  3. Variation of the height of the grain bed of an indirect solar bin dryer; Variacion de la altura del lecho del grano en un secador solar indirecto

    Energy Technology Data Exchange (ETDEWEB)

    Sima, Efrain; Alvarez, Gabriela; Garcia, Saul [CENIDET, Cuernavaca, Morelos (Mexico)

    2000-07-01

    This paper presents the effect of the variation of the size of the grain bed of an indirect solar bin dryer. This solar dryer was designed and built at the Instituto Tecnologico de Zacatepec and Sima performed the thermal evaluation. The solar bin dryer consists of a bin dryer of 0.92 m diameter and 1 m height (the maximum height of the grain bed is 0.6 m). a 2 m{sup 2} solar collector, a blower and an electronic card to control the inlet air flow of the bin. A load of 36 kg, 45 kg, 52 kg and 64 kg of corn were dried. The heights of the grain were 7.5 cm, 10 cm, 12.5 cm and 17 cm respectively. Solar radiation, inlet air velocity of the solar collector, pressure drop, grain temperature and humidity, ambient temperature and humidity of the drying air were recorded. The initial grain humidity was 27.2% and the final was 11.8%. [Spanish] En este trabajo se presenta el efecto de la variacion del lecho del grano en el proceso de secado de maiz, en un prototipo de secador solar de tipo indirecto. El secador fue disenado y construido en el Tecnologico de Zacatepec y evaluado por Sima, consta de una camara de secado de 0.92 m de diametro y una altura de 1 m. (la altura del lecho maximo de grano posible es de 0.6 m.), un colector solar con un area de 2 m{sup 2}, un extractor de aire y un control electronico para el flujo de aire. El secado de maiz se llevo a cabo con cargas de maiz de 36, 45, 52 y 64 kg. Las alturas en el lecho del grano fueron 7.5, 10, 12.5 y 17 cm. Para cada altura de lecho de grano se realizo una prueba. Durante cada prueba se realizaron mediciones de: radiacion solar, velocidad del aire a la entrada, caida de presion, temperatura del grano, humedad del grano, temperatura del aire ambiente, temperatura y humedad del aire de secado a la entrada y salida del secador. La humedad inicial del grano fue alrededor de 27.2% y la final de 11.8%.

  4. EFECTO DE LAS CONDICIONES DE SECADO SOBRE LA CINÉTICA DE DESHIDRATACIÓN DE LAS HOJAS DE MORERA (Morus alba

    Directory of Open Access Journals (Sweden)

    Mar\\u00EDa Lourdes Pineda-Castro

    2009-01-01

    Full Text Available El objetivo del presente trabajo fue determinar las cinéticas de deshidratación de la morera bajo diferentes condiciones de temperatura, velocidad y humedad del aire, entre junio y diciembre del 2006, en Costa Ri ca. Forraje de morera (Morus alba de 75 días fue empleado como sustrato. Se evaluó la cinética de deshidratación en un secador convectivo de resistencias eléctricas de bandeja única con diámetro de 0,22 m y carga de 122 ± 1 g hasta una humedad del 5 %. La evaluación se realizó para tres temperaturas de secado (60 °C, 75 °C y 90 °C, dos velocidades de aire (1,0 y 2,5 m/s y dos humedades del aire (12 g/kg aire seco y 45 g/kg aire seco, para un total de 12 tratamie ntos trip licados. Las curvas de secado correspondie ntes se estudia ron según el modelo de decaimiento exponencial de Newton. Se obtuvieron gráficos de velocidad de secado en función del tiempo y la humedad. Las cinéticas de deshidratación presentaron la curva típica del modelo de Newton, con altos coeficientes de correlación. Existió un efecto triple significativo (p<0,05 entre la temperatura, la velocidad y la humedad del aire sobre el tiempo de secado del sustrato; la variable más influyente fue la temperatura, seguida de la velocidad y por último la humedad del aire. El aumento de cualquie ra de estas varia bles implicó una disminución del tiempo de secado. El efecto de la temperatura sobre éste fue más pronuncia do a una velocidad del aire de 1 m/s.

  5. Desarrollo de técnicas combinadas de secado para la obtención de duraznos deshidratados con bajo contenido de sulfitos

    Directory of Open Access Journals (Sweden)

    URFALINO, D.P.

    2011-08-01

    Full Text Available En el deshidratado de durazno, la aplicación de dióxido de azufre (SO2 juega un importante rol por su efecto antioxidante y conservante. Sin embargo el SO2 y los sulfitos presentan efectos indeseados en la salud de los consumidores: reducen la asimilación de la vitamina B1 y pueden provocar dolores de cabeza crónicos, alteraciones en la memoria y constricciones bronquiales (mayormente en personas asmáticas. Los alimentos tratados con sulfitos son la principal fuente de ingesta del SO2, siendo difícil su reducción o sustitución por el consecuente cambio en las propiedades sensoriales de los mismos, sobre todo en color y sabor. Así, los consumidores podrían rechazar dichas alternativas, a pesar de que éstas pudieran considerarse más saludables. El presente trabajo tuvo por objetivo lograr un producto con bajos contenidos de SO2 a través deldesarrollo de nuevos métodos de procesado e inactivación enzimática sin perder de vista su calidad. Como primera alternativa se evaluó la aplicación de microondas y escaldado con agua caliente como métodos deinactivación de la polifenoloxidasa y la peroxidasa. Por otro lado, se evaluó el deshidratado osmótico combinado con secado convectivo, comparándolo con el secado convectivo tradicional. Como parámetros de calidad en los productos finales se utilizó la velocidad de deshidratado, el color y el contenido residual de sulfitos. Los métodos de inactivación enzimática ensayados no presentaron diferencias significativas, mientras que la combinación de deshidratado osmótico con secado convectivo presentó ventajas respecto al secado convectivo tradicional, logrando un producto con un contenido significativamente menor de sulfitos, excelentecolor y mejores características organolépticas que los productos tradicionales (mayor volumen, mejor palatabilidad. Si bien el secado tradicional presentó tiempos de proceso totales menores al secado combinado, la calidad del producto final

  6. Efecto de distintos tratamientos de conservación en la actividad antirradicalaria de alcaparras (Capparis spinosa L. cultivadas en Santiago del Estero, Argentina

    Directory of Open Access Journals (Sweden)

    Evangelina Adela González

    2010-06-01

    Full Text Available Capparis spinosa L. es un arbusto cuyos botones florales, conocidos con el nombre de alcaparras, tienen una amplia aplicación en la gastronomía. Las alcaparras se comercializan en distintas presentaciones de acuerdo a los tratamientos de conservación a los que son sometidas. Se estudiaron posibles variaciones en la actividad antirradicalaria de alcaparras argentinas, como resultado de diferentes métodos de procesamiento en relación con el contenido de flavonoides. Se analizaron botones conservados en vinagre y secados en sal, comparándose los valores obtenidos con los botones frescos y secados en estufa a 55 °C. Paralelamente, con el objetivo de explorar nuevas fuentes de sustancias antioxidantes, se analizaron también las hojas de la planta. Los resultados en cuanto a la determinación de flavonoides indicaron que el contenido total en botones frescos correspondió a 37 mg/g de materia seca mientras que en hojas frescas el valor fue de 23 mg/g de materia seca. El contenido de rutina en ambas muestras correspondió a un 86,5 y 95,6 % del contenido total de flavonoides, para botones y hojas frescas, respectivamente. La actividad antirradicalaria, determinada por el método de decoloración del radical 2,2-difenil-1-picril-hidracilo, mostró correlación con el contenido de flavonoides, siendo mayor para botones frescos con un valor equivalente a 46,7 mg/g de muestra seca. En cuanto al efecto de los tratamientos de conservación sobre los botones florales, se observó que la actividad antirradicalaria decrece en el siguiente orden: botones frescos > conservados en vinagre > secados a 55 °C > secados en sal. La mayor retención de la actividad antirradicalaria se observó en el tratamiento de conservación en vinagre, correspondiendo a un 62 % respecto a la actividad del material fresco. Los resultados indicaron que los botones florales al igual que las hojas son una importante fuente de flavonoides, especialmente rutina, incluso despu

  7. Efecto de distintos tratamientos de conservación en la actividad antirradicalaria de alcaparras (Capparis spinosa L. cultivadas en Santiago del Estero, Argentina

    Directory of Open Access Journals (Sweden)

    Evangelina Adela González

    2010-07-01

    Full Text Available Capparis spinosa L. es un arbusto cuyos botones florales, conocidos con el nombre de alcaparras, tienen una amplia aplicación en la gastronomía. Las alcaparras se comercializan en distintas presentaciones de acuerdo a los tratamientos de conservación a los que son sometidas. Se estudiaron posibles variaciones en la actividad antirradicalaria de alcaparras argentinas, como resultado de diferentes métodos de procesamiento en relación con el contenido de flavonoides. Se analizaron botones conservados en vinagre y secados en sal, comparándose los valores obtenidos con los botones frescos y secados en estufa a 55 °C. Paralelamente, con el objetivo de explorar nuevas fuentes de sustancias antioxidantes, se analizaron también las hojas de la planta. Los resultados en cuanto a la determinación de flavonoides indicaron que el contenido total en botones frescos correspondió a 37 mg/g de materia seca mientras que en hojas frescas el valor fue de 23 mg/g de materia seca. El contenido de rutina en ambas muestras correspondió a un 86,5 y 95,6 % del contenido total de flavonoides, para botones y hojas frescas, respectivamente. La actividad antirradicalaria, determinada por el método de decoloración del radical 2,2-difenil-1-picril-hidracilo, mostró correlación con el contenido de flavonoides, siendo mayor para botones frescos con un valor equivalente a 46,7 mg/g de muestra seca. En cuanto al efecto de los tratamientos de conservación sobre los botones florales, se observó que la actividad antirradicalaria decrece en el siguiente orden: botones frescos > conservados en vinagre > secados a 55 °C > secados en sal. La mayor retención de la actividad antirradicalaria se observó en el tratamiento de conservación en vinagre, correspondiendo a un 62 % respecto a la actividad del material fresco. Los resultados indicaron que los botones florales al igual que las hojas son una importante fuente de flavonoides, especialmente rutina, incluso despu

  8. LDC nuclear power: Argentina

    International Nuclear Information System (INIS)

    Tweedale, D.L.

    1982-01-01

    Argentina's 31-year-old nuclear research and power program makes it a Third World leader and the preeminent Latin American country. Easily accessible uranium fuels the heavy water reactor, Atucha I, which provides 10% of the country's electric power. Atucha II and III are under construction. Several domestic and international factors combined to make Argentina's program succeed, but achieving fuel-cycle independence and the capacity to divert fissionable material to military uses is a cause for some concern. 60 references

  9. Mediciones de irradiancia solar y capa de ozono durante el eclipse de Sol de 1994 en el Observatorio Astronómico de Rosario, Argentina

    Science.gov (United States)

    Piacentini, R. D.; Micheletti, M. I.

    We show results of measurements made during the Sun's eclipse of November 3, 1994, in Observatorio Astronómico de Rosario (32o 57' S, 60o 37' W, 25 m a.s.l.). The eclipse begin at 8:41 local hour, reached its maximum with 77% of the surface covered at 9:51 and finished at 11:04. The direct solar irradiance of 300 nm and 313 nm were able to be measured, due to the fact that during the whole period the sky remained completed uncovered (zero percent cloudiness). The measurements were made with the portable ozonometer developed by Tocho and co-workers. They show the characterictic decrease due to the occultation of the source, which is approximately proportional to the surface's diminution. When crossing the earth's atmosphere to arrive to the observation point, these irradiances are affected mainly by the ozone layer, specially the irradiance at lower wavelength, what let it to determine by comparison the thickness of this layer. The total ozone thickness distributed between the troposphere and the stratosphere shows an oscillation, whose amplitude, since the occurence of the maximum of occulation, has a mean value of 4%, and whose period is of approximately 2100 seconds, being both numbers considerably larger than the ones registred by Mims III y Mims (Geophysical Research Letters, 20, 367, 1993) during the eclipse of July 11, 1991 and by Tocho, Da Silva y Rivas (XVIII Quadriennial Ozone Symposiom, Italy, September, 1996) during the same eclipse analyzed in the present work, but observed in Salta. As complementary results, we measured the global irradiance and the ambient temperature during this astronomical event.

  10. Parámetros de Transferencia de Materia en el Secado de Frutas, sin Necesidad de Datos de Disminución de Volumen Mass Transfer Parameters in Fruit Drying, without using Shrinkage Data

    OpenAIRE

    Sebastião R Ferreira; Antônio R. S Costa

    2010-01-01

    Se desarrolló una metodología analítica para evaluar parámetros de transferencia de materia en el secado de frutas cilindricas, sin necesidad de conocer datos de disminución de volumen, pero admitiendo implícitamente disminución de su radio en el proceso R. Con el procedimiento se predice el coeficiente externo de transferencia de materia k m, la difusividad efectiva del agua en frutos De f, el número de Biot Bi y el radio promedio Rm durante el secado. Para probar la metodología es necesario...

  11. ESTUDIO DE LAS PROPIEDADES FÍSICAS Y DE LA CINÉTICA DE SECADO DE GRANOS DE MAIZ COLORADO DURO

    Directory of Open Access Journals (Sweden)

    Matías R. Ordóñez

    2012-01-01

    Full Text Available Se estudió el efecto de la humedad sobre propiedades físicas de granos de maíz Colorado Duro en el rango 17− 35% base seca, y la cinética de secado a temperaturas entre 30− 90°C y a velocidad de 0.43 m/s. El 12.91x10-3 m, diámetro contenido de humedad tuvo efecto significativo sobre la longitud (12.059x10-3− -3 -3 -3 -3 geométrico (7.8x10 − 8.281x10 m, diámetro equivalente (8.18x10 − 8.63x10 m, peso de mil granos (363.6− 421.9 g, ángulo de reposo (10.11− 24.66°, y densidades aparente (0.801− 0.684 g/mL y real (1.339− 1.170 g/mL; pero el ancho, espesor, porosidad y esfericidad no se vieron significativamente afectados. El secado ocurrió en el período de velocidad decreciente, siendo el tiempo de secado y la temperatura las variables significativas sobre la humedad del grano. Los modelos de Page, ecuación difusiva de “tiempos cortos” y una modificación introducida a éste ultimo resultaron adecuados (R2>0.99 para describir los datos. Los coeficientes de difusión de agua estuvieron entre 1.907x10-11 y 6.495x10-11 m2/s, y la energía de activación fue 17.74 kJ/mol.

  12. Empleo de metodos numericos para el ajuste de los coeficientes de difusividad (D) y convectivo de transferencia de masa (hm) en el secado de alimentos

    OpenAIRE

    Arranz Saiz, Francisco Javier; Correa Hernando, Eva Cristina; Jiménez Ariza, Heidi Tatiana; Diezma Iglesias, Belen; Garcia-Herrero, Javier; Robla Villalba, José Ignacio; Barreiro Elorza, Pilar

    2011-01-01

    Los modelos matemáticos de transferencia de humedad desde el alimento al medio circundante durante el proceso de secado dependen de dos parámetros: coeficiente de difusividad efectiva D y coeficiente convectivo de transferencia de masa hm, cuya determinación experimental se basa en la consideración de un sistema difusivo sencillo de solución analítica bien conocida. Para el caso, que aquí nos ocupa, de difusión monodimensional en una lámina infinita de grosor 2l, la solución analítica de ...

  13. Empleo del método de secado convectivo combinado para la deshidratación de papaya (Carica papaya L.), variedad Maradol roja

    OpenAIRE

    Sahylin Muñiz Becerá; Antihus Hernández Gómez; Annia García Pereira; Lilia Méndez Lagunas

    2013-01-01

    La presente investigación tiene como objetivo evaluar el método de secado convectivo de papaya (Carica papaya L.) variedad Maradol roja, combinado con la aplicación de pretratamientos de osmosis (DOSC) y escaldado simple (ESSC), mediante el efecto de los factores tecnológi- cos del secador: temperatura (40 y 60oC) y velocidad del flujo de aire (2,5 y 1,5 m/s) sobre el comportamiento de las propiedades de calidad de la fruta deshidratada y la cinética del proceso. El pretratamiento de escaldad...

  14. Helosis (Balanophoraceae en Argentina Helosis (Balanophoraceae in Argentina

    Directory of Open Access Journals (Sweden)

    José Luis Fontana

    2006-07-01

    Full Text Available Se cita por primera vez para Argentina Helosis cayennensis (Swartz Sprengel var. cayennensis en base a colecciones hechas por los autores en la Isla argentina de Apipé Grande, Ituzaingó, provincia de Corrientes. Se describe e ilustra la especie, el desarrollo de la planta y su estado de conservación. Esta cita de Helosis corresponde a un género nuevo para la flora argentina.Helosis cayennensis var. cayennensis is reported for the first time for Argentina. The species is described and ilustrated. Developement and ecology are also given. Helosis is also a new generic record for Argentina.

  15. Preparación de microesferas mediante secado por aspersión Preparation of microspheres through spray drying

    Directory of Open Access Journals (Sweden)

    Orestes Darío López Hernández

    2008-12-01

    Full Text Available La industria farmacéutica moderna busca constantemente tecnologías para la obtención de transportadores de diferentes fármacos como citostáticos, antiinflamatorios, péptidos y hormonas, entre otros, que impliquen una reducción de su toxicidad y una liberación sostenida o controlada para lograr el efecto terapéutico con una sola dosis. Dentro de estas tecnologías se destaca el empleo de microesferas biodegradables de ácidos polilácticos como sistemas poliméricos matriciales de liberación controlada. En el presente trabajo se exponen aspectos relevantes relacionados con la tecnología de obtención de microesferas mediante secado por aspersión conocido también como Spray drying, el cual tiene como ventajas una alta eficiencia de encapsulación además de ser un método rápido, continuo, relativamente sencillo con respecto a otros existentes, y principalmente brinda la posibilidad de ser escalado hasta nivel de producción.The modern pharmaceutical Industry search constantly technologies for obtaining drugs targeting as antineoplasics, peptides and hormones, among other that imply a toxicity reduction, and sustained or controlled release to achieve the therapeutic effect with a single dose. These technologies employment of biodegradable microspheres of polylactic acids as matricial polymeric systems for controlled release. This work related aspects with the technology of microspheres obtaining by Spray drying which has as advantages, a high encapsulation efficiency, continuous method, relatively simple it offers the possibility of being scale up until production level.

  16. Influencia de un sólido sobre el secado de mezclas líquidas parcialmente miscibles

    Directory of Open Access Journals (Sweden)

    M. Vargas

    2006-01-01

    Full Text Available Un estudio experimental del secado convectivo de un sólido humedecido con una mezcla líquida que exhibe separación de fases durante el proceso de evaporación ha sido efectuado. Los experimentos fueron realizados en un secador de túnel a escala de laboratorio bajo diferentes condiciones de operación tales como temperatura y velocidad del gas así como diferentes composiciones de las mezclas líquidas. Se humedeció el sólido con mezclas binarias y ternarias, y se efectuó la evaporación a partir de la superficie libre líquida. Se utilizo como humedad el sistema binario agua-hexano y la mezcla ternaria agua-hexano-etanol, ambos involucrados en la extracción de biopesticida a partir de semillas de nim. Esferas de vidrio y semillas de nim trituradas fueron usadas como sólido. La densidad y el índice de distribución másico de las fases tienen gran influencia en el proceso de evaporación. Si la fase menos densa del hexano esta en exceso, la superficie es cubierta solamente por esta fase y no existe evaporación de la otra fase hasta que el índice de distribución másico es tal que la segunda fase es expuesta al gas. La presencia de un sólido poroso interrumpe este patrón y la fase más densa puede ser removida simultáneamente incluso a bajas fracciones de esta última. En este caso, también la forma en que el sólido fue humedecido tiene influencia en el proceso.

  17. Actualidad y perspectivas de una bomba de calor de expansión directa con energía solar

    OpenAIRE

    Gorozabel-Chata, Francis-B.; Carbonell-Morales, Tania

    2016-01-01

    La bomba de calor de expansión directa con asistencia de energía solar se utiliza en el modo de calefacción para diversas aplicaciones entre las que podemos citar, calentamiento de agua, calentamiento de aire para climatizar edificios, desalinización de agua, secado solar entre otras. El presente trabajo revisa las principales investigaciones sobre esta tecnología enfocando sus aplicaciones para el calentamiento de agua, para lograr este objetivo se describen en detalle la configuración básic...

  18. Simulación físico-matemática del secado de la zeolita con microondas. // Physical-mathematical simulation of the zeolite drying with microwaves.

    Directory of Open Access Journals (Sweden)

    G. Quesada Ramos

    2004-01-01

    Full Text Available Se realiza una simulación físico-matemática del secado de la zeolita sometida a radiaciones de microondas utilizando la leyde Lambert. Las ecuaciones se expresan en un esquema implícito unidimensional, y se emplea el método numérico dediferencias finitas. La solución del sistema de ecuaciones se realiza por medio del método iterativo de Gauss-Seidel. Losresultados teóricos se comparan con los obtenidos experimentalmente.Palabras claves: Simulación, secado, zeolita, microondas._______________________________________________________________________________AbstractA physical-mathematical simulation of the zeolite drying with microwaves using the Lambert`s law is made. The equationsare expressed in an unidimensional implicit scheme, and the finite differences numeric method is used. The solution of theequations system is carried out by using the Gauss-Seidel´s iterativ method. The theoretical results are compared with thoseexperimentally obtained.Key words: Physical-mathematical simulation, drying, zeolite, microwaves.

  19. Economy Profile of Argentina

    OpenAIRE

    World Bank Group

    2017-01-01

    Doing Business 2018 is the 15th in a series of annual reports investigating the regulations that enhance business activity and those that constrain it. This economy profile presents the Doing Business indicators for Argentina. Doing Business presents quantitative indicators on business regulation and the protection of property rights that can be compared across 190 economies; for 2018 Arge...

  20. Radiation vulcanization in Argentina

    International Nuclear Information System (INIS)

    Ferenaz, Guillermo W.; Smolko, Eduardo E.

    1999-01-01

    The possibilities of using in Argentina the radiation process to vulcanize natural latex are analyzed. Experimental studies to define the irradiation conditions have been carried out and the preliminary elaboration of an irradiation device that includes the chemical reactor has been started. (author)

  1. El IDRC en Argentina

    International Development Research Centre (IDRC) Digital Library (Canada)

    comercio capaces de sostener el crecimiento y reducir la pobreza. ... Rosario, en Argentina, se ha convertido en un ejemplo internacional para la agricultura urbana gracias a la ... para evaluar los riesgos y beneficios de esta tecnología para ...

  2. Efectos de un cultivo de cobertura invernal consociado sobre la dinámica hídrica y la producción del cultivo estival en la región central de Córdoba, Argentina

    Directory of Open Access Journals (Sweden)

    L Pietrarelli

    2014-06-01

    Full Text Available La incorporación de cultivos de cobertura es una práctica agroecológica que actúa sobre los problemas generados por la simplificación productiva. Se estudiaron los efectos de un cultivo de cobertura invernal consociado de Vicia dacycarpa y Trititicum secale sobre la dinámica hídrica y el rendimiento del cultivo de soja. La experiencia se desarrolló en sistemas de producción agrícola, en Lozada (Córdoba, Argentina. El diseño experimental fue de bloques completamente aleatorizados (tres sistemas productivos con dos tratamientos: barbecho y cultivo de cobertura en la secuencia soja-soja. Se calcularon la humedad gravimétrica, volumétrica, disponibilidad de agua útil y porcentaje de agua útil hasta 100 cm, a la siembra del cultivo de cobertura, al momento de su secado y a la siembra del cultivo estival. Se determinó biomasa del cultivo de cobertura y del cultivo de soja posterior. Si bien el contenido hídrico del suelo del cultivo de cobertura al momento del secado fue menor que el testigo, no provocó un efecto negativo en el rendimiento de la soja. Con suficiente precipitación primaveral se logra una acumulación aceptable de biomasa del cultivo de cobertura y una mayor eficiencia en la recarga del perfil superior al momento de la siembra del cultivo estival.

  3. Cinética de secado de la yuca (Manihot esculenta Crantz variedad CORPOICA M-tai en función de la temperatura y de la velocidad de aire

    Directory of Open Access Journals (Sweden)

    Jairo Salcedo Mendoza

    2014-12-01

    Full Text Available El secado de yuca (Manihot esculenta Crantz variedad CORPOICA M-tai, fue realizado en un secador de bandejas a escala de laboratorio. Muestras de yuca con espesor de 0,2cm y diámetro de 0,4cm fueron colocadas en el equipo en contacto directo con aire caliente, bajo distintas condiciones de operación. Se evaluó el efecto de la temperatura (35, 45 y 55ºC y la velocidad del aire (1,0, 2,0 y 3,0m/s sobre el tiempo de secado y la difusividad efectiva. Los resultados obtenidos indicaron que a una temperatura y flujo de aire de 55°C y 3,0 m/s respectivamente, el tiempo de secado fue de 4,5h, alcanzándose una humedad de 4,87%. Los datos derivados de las curvas de secado fueron ajustados a los modelos de Newton, el de Dos términos exponencial, el de Wang y Singh, el de Henderson y Pabis modificado y el Difusión aproximal. De acuerdo con los resultados el modelo matemático que describió mejor el comportamiento cinético de las curvas de secado fue el modelo Difusión aproximal con una regresión lineal (0,958 ≤ R2 ≤ 0,993. La difusividad efectiva (Df de la yuca varió entre 1,26 x 10-10 y 4,14 x 10-10m2/s y la energía de activación (Ea varió entre 33,66 a 16,16KJ /mol.

  4. Mirror Coronograph for Argentina (MICA). Primera Luz

    Science.gov (United States)

    Stenborg, G.; Epple, A.; Schwenn, R.; Francile, C.; Rovira, M.

    En Julio de 1997 se terminó con la primera parte de la instalación del ``Coronógrafo de Espejo para la Argentina'' en la estación de altura Carlos U. Cesco (El Leoncito), gracias al esfuerzo de la gente del Max Planck Institut für Aeronomie (Alemania), del OAFA y del IAFE. Dicho coronógrafo forma parte de un programa de ciencia bilateral entre Alemania y Argentina. El propósito del mismo, en conjunción con otros telescopios solares y terrestres, es contribuir a un mejor entendimiento de cuestiones fundamentales de la física solar. Para ello, ya está observando la corona de emisión en el verde (Fe XIV), rojo (Fe X) y Hα entre 1.05 y 2 radios solares aproximadamente. El diseño del instrumento, el cual fuera ya presentado en esta misma reunión en La Plata en 1996, es esencialmente similar al del telescopio LASCO-C1 a bordo del Solar Heliospheric Observatory (SOHO). La adquisición de datos se realiza con un CCD de 1280x1024 pixels, codificando en 12 bits, pudiendo ser el mismo operado en forma remota. En esta reunión presentaremos algunas de las observaciones realizadas durante la puesta a punto del instrumento en el período julio-setiembre de 1997. Asimismo expondremos cómo y por qué sus resultados complementarán a los de su par en el espacio.

  5. Drying of mango pulp in a dryer of laboratory tunnel type; Secado de pulpa de mango en un secador de laboratorio tipo tunel

    Energy Technology Data Exchange (ETDEWEB)

    Pacheco Resendiz, Oscar; Chagoyan Serrano, Jose; Flores I, Alfredo; Rodriguez M, Jose A [Universidad Autonoma de Baja California Sur (Mexico)

    2000-07-01

    The result of four tests of drying of mango pulp Kent are presented, which were carried out in a dryer of the tunnel type in constant conditions of temperature, speed and absolute humidity of the air. The temperatures at which the tests were conducted were 35, 40, 45 and 50 Celsius degrees. The average speed of the drying air was 2.35 m/s. For the four tests the drying variables were measured for the purpose of controlling the process. The tests were suspended after 10 hours. The initial and final moisture contents of the samples on a wet weight basis for the test at 35 were 87.04% and 58.94% for that at 40 were 87.42% and 17.25%, for that at 45 were 87.55% and 13.29%, and for that at 50 were 87.43% and 48%. The graphs of the evolution of moisture content of the samples dried under the specified conditions are compared. [Spanish] Se presentan los resultados de cuatro pruebas de secado de pulpa de mango Kent, las cuales se realizaron en un secador tipo tunel en condiciones constantes de temperatura, velocidad y humedad absoluta del aire. Las temperaturas empleadas fueron 35, 40, 45 y 50 grados Celsius y la velocidad del aire de secado fue de 2.35 m/s. Para las cuatro pruebas se midieron las variables de secado mencionadas con el fin de controlar el proceso. Las pruebas se suspendieron al cumplirse 10 h. Las humedades inicial y final base humeda de las muestras para la prueba de 35 fueron 87.04% y 58.94%, para la de 40 fueron 87.42% y 17.25% y para la de 45 fueron de 87.55% y 13.29% y para la de 50 fueron de 87.43% y 48%. Se comparan entre si las graficas de la evolucion del contenido de humedad de las muestras que se secaron a las condiciones ya mencionadas.

  6. Incremento de disolución de un derivado del furano mediante la técnica de secado por atomización

    Directory of Open Access Journals (Sweden)

    Antonio Iraizoz Barrios

    2012-06-01

    Full Text Available Objetivo: incrementar la solubilidad en agua del 2-bromo-5-(2-bromo-2-nitrovinyl-furano (G1, un ingrediente farmacéuticamente activo sintetizado por el Centro de Bioactivos Químicos de la Universidad Central de Las Villas, con potente acción bactericida y fungicida, mediante la elaboración de macropartículas de dispersiones sólidas utilizando un proceso de secado por atomización. Métodos: se realizó un ensayo preliminar de secado por atomización de la suspensión de G1, compuesta por: 10 g de G1, 1 g de Aerosil (Aerosil®, Degusa, Bélgica, 1 g de laurilsulfato de sodio y 100 mL de agua. La atomización se efectuó en un equipo de laboratorio (Buchi Mini Dryer spray a 90 ºC. La dispersión sólida obtenida fue caracterizada físico-químicamente mediante difracción de rayos X, granulometría láser por el método de difracción angular, calorimetría diferencial de barrido, microscopia electrónica de barrido y espectrofotometría de absorción infraroja. Resultados: las partículas obtenidas presentaron un pequeño tamaño, forma esférica y un incremento de la cristalinidad del G-1; no se encontraron interacciones entre los componentes de la dispersión ni presencia de productos de degradación, y la solubilidad del G-1 en agua resultó notablemente incrementada. Conclusiones: el producto obtenido por la técnica de secado por atomización incrementó apreciablemente la solubilidad del G1 sin afectar los grupos funcionales, responsables de la actividad terapéutica que se le reportan al ingrediente activo estudiado. Estos alentadores resultados sugieren la necesidad de continuar estudios para la optimización del proceso y realizar al producto obtenido ensayos de estabilidad con el objetivo de su futura inclusión en formas farmacéuticas de dosificación.

  7. Argentina set for privatization

    International Nuclear Information System (INIS)

    Chynoweth, E.

    1992-01-01

    Buyers are lining up for Argentina's two big state-controlled petrochemical groups, Buenos Aires-based Petroquimica General Mosconi (PGM) and Petroquimica Bahia Blance (PBB). However, feedstock supply contracts with government-owned oil group Yacientos Petroliferos Fiscales (YPG) and gas group Gas del Estado hold the key to both sales. Shell Compania Argentina Petroleo SA (CAPSA), Perez Companc, and Global Petroleum have already bought PGM tender documentation. Shell says it will bid for PGM if the feedstock contract with YPF is acceptable. In addition to price and volume, Shell says the length is critical; it wants a 15-year deal, but would settle for 11. YPF initially sought a five-year contract. PGM, which produces 300,000 m.t./year of aromatics, plus oxo alcohols, methanol, and methyl tert-butyl ether, has sales of $150 million/year

  8. Crisis cambiaria en Argentina

    OpenAIRE

    Féliz, Mariano

    2009-01-01

    El análisis de la articulación entre el proceso de valorización exitosa de capital y la tendencia a la desvalorización de las mercancías se aplica a una de las manifestaciones de la crisis argentina: la devaluación del peso. Se estudia la relación entre la determinación del tipo de cambio y la valorización del capital. Se discuten las tendencias concretas de la economía argentina en la década de 1990 y se muestra cómo la devaluación de 2001-2002 fue producto necesario del propio proceso de va...

  9. Fruit fly eradication: Argentina

    International Nuclear Information System (INIS)

    2003-01-01

    Fruit exports account for 9% of Argentina's total agricultural exports and generate annually close to $450 million. This could be increased but for fruit flies that cause damage equivalent to 15% to 20% of present production value of fruit and also deny export access to countries imposing quarantine barriers. The Department of Technical Co-operation is sponsoring a programme, with technical support from the Joint FAO/IAEA Division, to eradicate the Mediterranean fruit fly using the Sterile Insect Technique (SIT). (IAEA)

  10. Argentina [Country report

    International Nuclear Information System (INIS)

    Ferreyra, R.

    2005-01-01

    The airborne geophysical surveys developed in Argentina are described. They have got more than 500.000 km 2 acquiring data for U, Th, K and total background activity. Other types of published data are also mentioned (satellite imagery, seismic hazard, climate, soil distributions, etc.). The availability of maps with the abundances of elements analyzed at the country and also at laboratories from Canada is described, as well as data of analysis of several elements at two study areas proposed at the outset of the project. The availability of process rate data and epidemiological data is also explained. Argentina intended fully to participate in the CRP at the outset of the project. Due, however, to external resource constraints imposed on the participating organization (Comision Nacional de Energia Atomica, CNEA), the level of participation had to be significantly reduced. Nonetheless, in the first period of the CRP, Argentina undertook to collate existing geological and geochemical information within the country, and began to define potential areas for site specific natural systems safety indicator studies. (author)

  11. de la sociedad argentina

    Directory of Open Access Journals (Sweden)

    Diego Galeano

    2007-01-01

    Full Text Available Este artículo trata sobre un período de la historia argentina en el cual la "mirada médica", a través de un grupo de prestigiosos intelectuales, se convirtió en una clave de interpretación de la sociedad argentina. El análisis gira en torno a la obra de uno de los médicos higienistas más influyentes, José María Ramos Mejía, deteniéndose especialmente en su libro más famoso: Las multitudes argentinas (1899. La hipótesis principal que recorre el texto es la siguiente: la medicalización de la sociedad, acentuada luego de las epidemias de cólera y fiebre amarilla de mediados del siglo XIX, ofreció a las elites públicas la posibilidad de construir dominios legítimos de intervención estatal. Intromisiones del Estado en la vida privada que, además de ser algo resistidas por la población, entraban en tensión con los principios teóricos del liberalismo que los propios miembros de la elite defendían.

  12. Estudio de la cinética fisicoquímica del mango (mangifera indica l. var. tommy atkins) tratado por métodos combinados de secado

    OpenAIRE

    MORENO, ANGÉLICA; LEÓN, DAVID; GIRALDO, GERMAN; RIOS, EUNICE

    2010-01-01

    El seguimiento cinético de los parámetros de peso, actividad de agua (aw) y ganancia de sólidos solubles (ºBrix) en cubos de mango (Mangifera indica L. Var. Tommy Atkins) fueron evaluados durante los procesos de deshidratación osmótica con o sin pulso de vacío (DO y DOPV) en combinación con el secado por aire caliente (SAC) o a vacío (VAC). Se observó que la DOPV y el SAC son los métodos más efectivos ya que requieren menor tiempo de proceso para alcanzar sus niveles adecuados de humedad para...

  13. ESTUDIO DE LA CINÉTICA FISICOQUÍMICA DEL MANGO (Mangifera indica L. Var. Tommy Atkins) TRATADO POR MÉTODOS COMBINADOS DE SECADO

    OpenAIRE

    MORENO, ANGÉLICA; LEÓN, DAVID; GIRALDO, GERMAN; RIOS, EUNICE

    2010-01-01

    El seguimiento cinético de los parámetros de peso, actividad de agua (a w) y ganancia de sólidos solubles (ºBrix) en cubos de mango (Mangifera indica L. Var. Tommy Atkins) fueron evaluados durante los procesos de deshidratación osmótica con o sin pulso de vacío (DO y DOPV) en combinación con el secado por aire caliente (SAC) o a vacío (VAC). Se observó que la DOPV y el SAC son los métodos más efectivos ya que requieren menor tiempo de proceso para alcanzar sus niveles adecuados de humedad par...

  14. ESTUDIO DE LAS PROPIEDADES FÍSICAS Y DE LA CINÉTICA DE SECADO DE GRANOS DE MAIZ COLORADO DURO

    OpenAIRE

    Matías R. Ordóñez; María C. Gely; Ana M. Pagano

    2012-01-01

    Se estudió el efecto de la humedad sobre propiedades físicas de granos de maíz Colorado Duro en el rango 17− 35% base seca, y la cinética de secado a temperaturas entre 30− 90°C y a velocidad de 0.43 m/s. El 12.91x10-3 m), diámetro contenido de humedad tuvo efecto significativo sobre la longitud (12.059x10-3− -3 -3 -3 -3 geométrico (7.8x10 − 8.281x10 m), diámetro equivalente (8.18x10 − 8.63x10 m), peso de mil granos (363.6− 421.9 g), ángulo de reposo (10.11− 24.66°), y densidades aparente (0....

  15. Efecto del secado de las muestras sobre la extracción selectiva de Fe y A1 activos en Andisoles del norte de la cordillera central Colombiana.

    Directory of Open Access Journals (Sweden)

    Jaramillo J. Daniel F.

    2000-12-01

    Full Text Available Muestras secadas al aire y sin secar de cinco perfiles de Andisoles del norte de la cordillera central colombiana fueron sometidas a extracción con oxalato ácido de amonio y con pirofosfato de sodio. En los extractos de oxalato se determinaron A1, Fe y Si y en los de pirofosfato A1 y Fe. El secado de las muestras redujo significativamente al 95% la cantidad de A1 y de Fe extraída con oxalato ácido, dificultando la clasificación de los suelos en el orden Andisol utilizando los parámetros de la taxonomía del USDA.

  16. SIMULACIÓN MATEMÁTICA DEL PROCESO DE SECADO DE LA GRACILARIA CHILENA (GRACILARIA CHILENSIS MATHEMATICAL SIMULATION OF DRYING PROCESS OF CHILEAN GRACILARIA (GRACILARIA CHILENSIS

    Directory of Open Access Journals (Sweden)

    Antonio Vega Gálvez

    2007-04-01

    Full Text Available El objetivo de este trabajo es estudiar y modelar la cinética de secado por aire caliente del alga Gracilaria (Gracilaria chilensis utilizando un secador convectivo diseñado y construido en la Facultad de Ingeniería de la Universidad de La Serena a cinco temperaturas de bulbo seco (30, 40, 50, 60 y 70ºC y velocidad de aire de 2.0±0.2 m.s-1. Para el modelado matemático se utilizan tres modelos empíricos (Newton, Henderson-Pabis & Page. Durante el experimento se observa solamente el periodo de velocidad decreciente, por lo que se utiliza la ecuación de la segunda Ley de Fick para el cálculo de la difusividad efectiva de agua. El proceso de secado presenta humedades finales entre 0.096 g agua/g m.s y 0.061 g agua/g m.s para 30ºC y 70ºC, respectivamente. Tanto la difusividad como los parámetros cinéticos k1, k2 y k3 de los modelos propuestos presentan dependencia con la temperatura y al evaluarlos con la ecuación de Arrhenius se obtienen energías de activación de 39.92, 33.85, 33.49 y 33.83 kJ·mol-1, respectivamente. De acuerdo a los análisis estadísticos que se utilizan (r2, SSE, RMSE y X², el modelo de Page muestra la mejor calidad de ajuste sobre los datos experimentales, otorgando así una buena herramienta para el modelado de la cinética de secado industrial de la Gracilaria chilensis y el cálculo del tiempo de secado a diferentes temperaturas, con el fin de alcanzar un contenido de humedad comercial aceptable internacionalmente.The aim of this research is to study and to model the hot air drying kinetics of Gracialaria algae (Gracilaria chilensis, using a convective drier -designed and built at the Faculty of Engineering of Universidad de La Serena- at five dry bulb temperatures (30, 40, 50, 60 and 70ºC and an air velocity of 2.0 ± 0.2 m.s-1. Three empirical models are used for the mathematic modeling (Newton, Henderson-Pabis & Page. During the experiment, only a falling rate period is observed, hence the Fick's second

  17. Intermittent Coffee Drying in Deep Bed with Pulsed Airflow Secado de Café en Lecho Fijo con Intermitencia Térmica y Flujo de Aire Pulsado

    Directory of Open Access Journals (Sweden)

    Héctor José Ciro Velásquez

    2011-12-01

    Full Text Available A dryer in deep bed without airflow reversal was adapted to work simultaneously with thermal intermittence and pulsed airflow in the drying of parchment coffee bean. The dryer was operated by cycles of thermal intermittence for a heating temperature of 55 °C and cooling of 40 and 25 °C. The results showed that the increase of temperature in the cycle of cooling tends to increase the water removal and that the increase of the number of air pulses without reversal of the direction of air flow causes an excessive moisture gradient within the batch. Moreover, the specific energy requirement of the dryer was from 15 to 25 MJ/kg, showing the best thermal performance for the condition in which the dryer was operate without pulsed airflow.Un secador de lecho fijo fue adaptado para trabajar de forma simultánea con intermitencia térmica y flujo de aire pulsado sin inversión de flujo de aire, en el secado de granos de café. El secador fue operado con ciclos de intermitencia térmica para una temperatura de calentamiento de 55 °C y enfriamiento de 40 y 25 °C. Los resultados mostraron que el aumento de temperatura en el ciclo de enfriamiento, tiende a incrementar la remoción de agua y que el aumento del número de pulsos de aire sin inversión del flujo de dirección del aire, ocasiona un secado deficiente debido al excesivo gradiente de humedad ocasionado en la capa de producto. Adicionalmente, se encontró que el consumo de energía específica del secador varió entre 15 y 25 MJ/kg de agua evaporada, siendo el mejor rendimiento termo energético para la condición en la cual el secador fue operado sin flujo de aire pulsado.

  18. Proceso artesanal de extracción, manejo y secado de las fibras naturales de banano (Musa paradisiaca en la Parroquia El Retiro de la Provincia de El Oro

    Directory of Open Access Journals (Sweden)

    Linda Maldonado

    2016-06-01

    Full Text Available Ecuador es considerado un país bananero. En muchas de sus provincias existen grandes plantaciones de banano y que se aprovecha solo el fruto. Se desechan su pseudotallo y otras partes, que pocas veces se emplean como abono. El objetivo del  proyecto es darle un valor agregado a este  residuo, aprovechando toda la fibra natural que posee para utilizarla en la obtención de panelería y enchapes del tipo Fibra de densidad media, conocidos por su sigla en inglés MDF. El presente artículo tiene como propósito dar a conocer el proceso de extracción de las fibras de una forma absolutamente artesanal que se inicia a partir de la selección y corte del pseudotallo, su  desvainado y la separación  de cada uno de los tipos de fibras. Estas se clasifican en suaves, duras  y la denominada  malla. Una vez obtenidas las fibras, se procede a secarlas, se observan detenidamente y se tiene en cuenta las horas de exposición al sol, y las que permanecen a la sombra, prestando  especial atención  al color que adquieren  de acuerdo con la radiación solar, y el tiempo de cortado el pseudotallo. Se consideró aplicarle color a la fibra y se tiñó mediante un proceso de cocción, durante el cual se le agrega  tinte  vegetal  de color turquesa. Posteriormente concluimos que  para el objeto de nuestro estudio  no es necesario  que tengan colores  artificiales,  pero sí sería ideal, aumentar  la intensidad de su color natural después del secado, eso realzaría la textura de los paneles y enchapes que se desean obtener.

  19. Argentina: a mature urbanization pattern.

    Science.gov (United States)

    Rofman, A B

    1985-02-01

    "This article describes the historical development of Argentina's cities, pointing out the traditional dominance of the 'centre-litoral' region and...[of] Buenos Aires. Recent trends such as the population increase in the southern region are described and demographic trends are related to economic developments. The article concludes by examining Argentina's contemporary urban patterns, including the current low rate of urbanization." excerpt

  20. Argentina's radioactive waste disposal policy

    International Nuclear Information System (INIS)

    Palacios, E.

    1986-01-01

    The Argentina policy for radioactive waste disposal from nuclear facilities is presented. The radioactive wastes are treated and disposed in confinement systems which ensure the isolation of the radionucles for an appropriate period. The safety criteria adopted by Argentina Authorities in case of the release of radioactive materials under normal conditions and in case of accidents are analysed. (M.C.K.) [pt

  1. Analysis of efficiency of a solar dryer tunnel type of mango pulp; Analisis de la eficiencia de un secador solar tipo tunel para pulpa de mango

    Energy Technology Data Exchange (ETDEWEB)

    Chagoyan Serrano, Jose [Universidad Autonoma de Baja California Sur, La Paz, Baja California Sur (Mexico)

    2000-07-01

    A new method to assess the performance of a solar dryer is presented. It describes energy efficiency indicators to improve a commercial dryer design. First, a preliminary dryer design procedure is described step by step. Then, two different modes of a tunnel dryer are investigated: Batch and semi-continue operations. The results of the analysis show that, the thermal efficiency is not sufficient to rate de dryer performance. It is necessary to include the productivity of the drying process and the quality of the dried fruit. The drying process and productivity tend to go hand-in-hand but in opposite directions. That is to say, raising the thermal efficiency reduce the process productivity and conversely. The analysis also suggests that an agreement between the efficiency, productivity and the quality must be specified in the drier design. [Spanish] Se presenta un procedimiento nuevo para evaluar la operacion de un secador solar, con el cual se precisan indicadores de la eficiencia que pueden ser utiles para mejorar el diseno del equipo. Se empieza por describir los pasos de un procedimiento de diseno preliminar de un sistema de secado. Despues, se analizan cualitativamente dos secadores: uno que opera por lotes y el otro de modo semicontinuo. Los resultados del analisis muestran que, la eficiencia termica del equipo no es un criterio suficiente para evaluar su operacion; tambien se requiere tomar encuenta la productividad del proceso de secado y la calidad del producto final. Se concluye que la eficiencia termica y la productividad del proceso son conceptos encontrados. Es decir, la eficiencia termica del equipo no es un criterio suficiente para evaluar su operacion; tambien se requiere tomar en cuenta la productividad del proceso de secado y la calidad del producto final. Se concluye que la eficiencia termica y la productividad del proceso son conceptos encontrados. Es decir, la eficiencia termica solo se puede aumentar a costa de la productividad y viceversa

  2. RERTR activities in Argentina

    International Nuclear Information System (INIS)

    Adelfang, P.; Alvarez, L.; Pasqualini, E.

    2002-01-01

    The Atomic Energy Commission of Argentina has been an active participant of the RERTR program since 1978. An important milestone of the Argentinean RERTR program was the development and manufacturing at industrial scale of U 3 O 8 dispersed fuel and its subsequent application to the conversion of the RA-3 reactor core to LEU fuel. More recently, our activities were focused on the development of U 3 Si 2 fuel with a density of 4.8 gU/cm 3 and the improvement of the manufacturing process of this type of fuel. The program to qualify CNEA as a supplier U 3 Si 2 dispersed fuels is scheduled to finalize by mid 2003. To hasten this program the main research reactor of Argentina, the RA3, raised its power from 5 MW to 8 Mw in October this year. This is an intermediate step in the program to increase RA-3 power to 10 MW Currently, one of the main objectives is to develop and qualify the technology for the production of high-density LEU fuel elements using U-Mo alloy. An original way to produce U-Mo powder (the HMD process) was developed and its being upgraded to plant scale production. Another significant progress was the development of LEU targets for the production of 99 Mo, in the form of miniplates prepared with dispersed LEU U-Al x . The shipment to USA of 207 MTR spent fuels containing US origin highly enriched uranium, successfully carried out in the end of 2000, is another remarkable achievement of the Argentinean RERTR program. This activity was carried out in the framework of the United States Foreign Research Reactor Spent Nuclear Fuel Acceptance Program. The fuels were fabricated in Argentina and used in the RA-3 reactor from 1968 to 1987. The inventory of the shipped HEU spent fuel consisted in 166 standard assemblies and 41 control assemblies. (author)

  3. Case study - Argentina

    International Nuclear Information System (INIS)

    Diaz, E.

    1986-01-01

    Antecedents and experience of nuclear activities in Argentina; the Atomic Energy Commission (CNEA). First development and research activities. Research reactors and radioisotopes plants. Health physics and safety regulations. - Feasibility studies for the first nuclear power plant. Awarding the first plant CNA I (Atucha I). Relevant data related to the different project stages. Plant performance. - Feasibility study for the second nuclear power plant. Awarding the second plant CNE (Central Nuclear Embalse). Relevant data related to established targets. Differences compared with the first station targets. Local participation. Plant performance. (orig./GL)

  4. Influencia del secado lento a baja temperatura en el contenido carotenoide de dos variedades de pimiento (Capsicum annuum L.. Balance biosintético y/o degradativo en función de las condiciones de procesado

    Directory of Open Access Journals (Sweden)

    Minguez-Mosquera, M. I.

    2001-10-01

    Full Text Available A study of drying process at low temperature of two varieties of pepper for paprika (Capsicum annuum L. cv Jaranda and Jariza according to the traditional techniques of La Vera region is carried out controlling simultaneously the characteristics of the fruits before and after of the dehydration process and the conditions used. Correspondences have been found between the initial moisture of the fruits, the drying parameters (temperature and time, and the increase and/or loss (including its corresponding quantity in carotenoid pigment content. The favorable conditions to produce a pigment content increase, that indicates the existence of a biosynthetic process, are those including a healthy raw material with high moisture values and temperature of dried moderate - low (50 ºC without extending unnecessarily the dehydration time (just to obtain the adequate texture for the grinding.Se realiza un estudio del proceso de secado de dos variedades de pimiento pimentonero (Capsicum annuum L. cv Jaranda y cv Jariza efectuado a baja temperatura según las técnicas tradicionales de la comarca de La Vera. El control de las características de los frutos antes y después del procesado y de las condiciones de deshidratación en seis procesos de secado han permitido establecer una correspondencia entre la humedad inicial de los frutos, los parámetros de secado (temperatura y tiempo, y la ganancia y/o pérdida (y su correspondiente cuantía en el contenido inicial de pigmentos carotenoides. Las condiciones favorables a una ganancia en pigmentos (que indica la existencia de un proceso biosintético son aquellas en las que se parte de frutos sanos, con altos valores de humedad, temperatura de secado moderada - baja (menor de 50 ºC y sin extender innecesariamente el tiempo de procesado (sólo hasta conseguir la textura adecuada para la molienda.

  5. SECAFÉ Parte I: modelamiento y simulación matemática en el secado mecánico de café pergamino SECAFÉ Part I: modeling and mathematical simulation in the mechanical drying of parchment coffee

    Directory of Open Access Journals (Sweden)

    Alfonso Parra-Coronado

    2008-08-01

    Full Text Available Se implementó en lenguaje de programación Microsoft Visual Basic 6.0, dos programas de simulación matemática para el secado de café pergamino, tomando como base los modelos de Thompson y de la Universidad del Estado de Michigan (MSU, para lo cual se utilizaron los parámetros determinados en Cenicafé para la simulación matemática del secado de café pergamino. Los programas estiman el funcionamiento de cada uno de los secadores mecánicos de café existentes en Colombia. Se compararon los resultados obtenidos mediante simulación para cada uno de los secadores, con los resultados experimentales obtenidos en Cenicafé, concluyéndose que éstos predicen adecuadamente el secado del café pergamino. Con base en los buenos resultados de la evaluación de los programas, se implementó un único programa de simulación para el secado de café pergamino.A Microsoft Visual Basic 6.0 parchment coffee drying program was implemented. Two separate programs, based on the Thompson and Michigan State University (MSU models, using Cenicafé coffee parameters, were successfully tested for the evaluation of the performance of all mechanical coffee dryers existing in Colombia. The results obtained by means of simulation for each one of the dryers were compared with the experimental results obtained in Cenicafé, resulting in the conclusion that these suitably predict the drying of the coffee parchment. Based on the good results obtained, a unique simulation program was implemented for drying parchment coffee.

  6. Activities with Argentina

    International Nuclear Information System (INIS)

    1999-01-01

    In 1989, the US Department of Energy (DOE) responded to the need to redirect resources from weapons production to environmental restoration and waste management by establishing the Office of Environmental Management (EM) and delegated to this office the responsibility of cleaning up the US nuclear weapons complex. Now in its eight year, EM's mission has three central facets: (1) to assess, remediate, and monitor contaminated sites and facilities; (2) to store, treat, and dispose of waste from past and current operations; and (3) to develop and implement innovative technologies for environmental cleanup. To this end, EM has established domestic and international cooperative technology development programs, including one with the Republic of Argentina. Cooperating with Argentine scientific institutes and industries meets US cleanup objectives by: (1) identifying and accessing Argentine EM-related technologies, thereby leveraging investments and providing cost-savings; (2) improving access to technical information, scientific expertise, and technologies applicable to EM needs; and (3) fostering the development of innovative environmental technologies by increasing US private sector opportunities in Argentina in EM-related areas

  7. QUBIC in Argentina

    Science.gov (United States)

    García, B.; Harari, D.; Etchegoyen, A.; Medina, M. C.; Romero, G. E.; Qubic Collaboration

    2017-10-01

    QUBIC (QU Bolometric Interferometer for Cosmology) is an experimental cosmology project to measure the modes in the polarization of the cosmic background radiation (CBR), the fossil relic that reveals the properties at the Universe 380,000 years after the Planck Era. Discovery of the CBR in 1964 and measurement of tiny temperature anisotropies in 1992 were major breakthroughs in our understanding of the Universe. The next challenge is to measure the polarization of the CBR accurately enough to detect modes that would reveal the existence of primordial gravitational waves produced in the first stages of the Planck Era and probe inflation theory, that assumes an accelerated expansion during the first seconds. The mode signal is however extremely weak and its measurement requires complex instruments. The QUBIC collaboration has developed the concept of interferometric bolometry, that brings together the sensitivity of bolometric detectors with the control of systematic effects provided by interferometry. QUBIC is an international collaboration involving several universities and laboratories in France, Italy, United Kingdom and USA. Recently, Argentina has suggested Alto Chorrillo (Salta), as candidate site for the installation of the experiment, next to the LLAMA site. Here we describe the scientific objectives and the main features of the experiment and we detail the process through which the international collaboration decided to install in Argentina its first module as well as the challenges for our country in this project.

  8. RERTR activities in Argentina

    International Nuclear Information System (INIS)

    Adelfang, P.; Alvarez, L.; Boero, N.; Calabrese, R.; De La Fuente, M.; Echenique, P.; Markiewicz, M.; Pasqualini, E.; Perez, A.; Piazza, A.; Ruggirello, G.; Taboada, H.

    2000-01-01

    The Atomic Energy Commission of Argentina has been involved in the Reduced Enrichment for Research and Test Reactors Program since 1978. The most relevant milestones of the program, regarding fuel R and D activities, were the development and manufacturing at industrial scale of U 3 O 8 dispersed fuel assemblies and the conversion of the RA-3 reactor core to LEU fuel. More recently, the activities were focused in the development of high density U 3 Si 2 fuel with a density of 4.8 gU/cm 3 and the improvement of the manufacturing process of U 3 Si 2 powder. Currently one of the main objectives is to develop and qualify the technology for the production of high-density LEU fuel elements using U-Mo alloy. Several alternative ways to obtain U-Mo powder are under development with the aim of evaluating plant scale production and costs. To boost this program the main research reactor of Argentina, the RA-3, will be upgraded to 10 MW early in 2001 and the hot cells at the Ezeiza Atomic Center are fully operational after important investments. Significant progresses were also carried out in the development of LEU targets for the production of Mo 99 . Experimental work has demonstrated the feasibility of the manufacturing and radiochemical processing of miniplate targets prepared with dispersed UAl x , maintaining the geometry and the alkaline processing of the HEU targets used so far. (author)

  9. Population structure in Argentina.

    Directory of Open Access Journals (Sweden)

    Marina Muzzio

    Full Text Available We analyzed 391 samples from 12 Argentinian populations from the Center-West, East and North-West regions with the Illumina Human Exome Beadchip v1.0 (HumanExome-12v1-A. We did Principal Components analysis to infer patterns of populational divergence and migrations. We identified proportions and patterns of European, African and Native American ancestry and found a correlation between distance to Buenos Aires and proportion of Native American ancestry, where the highest proportion corresponds to the Northernmost populations, which is also the furthest from the Argentinian capital. Most of the European sources are from a South European origin, matching historical records, and we see two different Native American components, one that spreads all over Argentina and another specifically Andean. The highest percentages of African ancestry were in the Center West of Argentina, where the old trade routes took the slaves from Buenos Aires to Chile and Peru. Subcontinentaly, sources of this African component are represented by both West Africa and groups influenced by the Bantu expansion, the second slightly higher than the first, unlike North America and the Caribbean, where the main source is West Africa. This is reasonable, considering that a large proportion of the ships arriving at the Southern Hemisphere came from Mozambique, Loango and Angola.

  10. Secadores solares - térmicos para granos y frutas para utilizarlo en zonas remotas

    OpenAIRE

    Delgado, E.; Peralta, J.; Barriga, A.

    2009-01-01

    Los objetivos principales de esta investigación son: • Dar a conocer la ventaja que tiene el uso de la utilización de la energía solar térmica para sistemas de secadores solares en la disminución de la humedad de los producto. • Valorar la importancia de la conservación energética y ambiental a través del uso de energía limpia. • Dar a conocer diseños de sistema de secado solar para alimentos, principalmente granos y frutas acorde a las características del producto, geográficas, técnicas y so...

  11. Research reactors in Argentina

    International Nuclear Information System (INIS)

    Carlos Ruben Calabrese

    1999-01-01

    Argentine Nuclear Development started in early fifties. In 1957, it was decided to built the first a research reactor. RA-1 reactor (120 kw, today licensed to work at 40 kW) started operation in January 1958. Originally RA-1 was an Argonaut (American design) reactor. In early sixties, the RA-1 core was changed. Fuel rods (20% enrichment) was introduced instead the old Argonaut core design. For that reason, a critical facility named RA-0 was built. After that, the RA-3 project started, to build a multipurpose 5 MW nuclear reactor MTR pool type, to produce radioisotopes and research. For that reason and to define the characteristics of the RA-3 core, another critical facility was built, RA-2. Initially RA-3 was a 90 % enriched fuel reactor, and started operation in 1967. When Atucha I NPP project started, a German design Power Reactor, a small homogeneous reactor was donated by the German Government to Argentina (1969). This was RA-4 reactor (20% enrichment, 1W). In 1982, RA-6 pool reactor achieved criticality. This is a 500 kW reactor with 90% enriched MTR fuel elements. In 1990, RA-3 started to operate fueled by 20% enriched fuel. In 1997, the RA-8 (multipurpose critical facility located at Pilcaniyeu) started to operate. RA-3 reactor is the most important CNEA reactor for Argentine Research Reactors development. It is the first in a succession of Argentine MTR reactors built by CNEA (and INVAP SE ) in Argentina and other countries: RA-6 (500 kW, Bariloche-Argentina), RP-10 (10MW, Peru), NUR (500 kW, Algeria), MPR (22 MW, Egypt). The experience of Argentinian industry permits to compete with foreign developed countries as supplier of research reactors. Today, CNEA has six research reactors whose activities have a range from education and promotion of nuclear activity, to radioisotope production. For more than forty years, Argentine Research Reactors are working. The experience of Argentine is important, and argentine firms are able to compete in the design and

  12. History of radiobiology in Argentina

    International Nuclear Information System (INIS)

    Mayo, Jose

    2004-01-01

    Radiobiology is a multidisciplinary science dealing with ionising radiation effects on biological material. The history of Radiobiology begins in Germany and France around 1886. Radiobiology was introduced in Argentina in 1926 at the Institute of Oncology Angel H. Roffo as a biomedical research branch. Later on in 1957 was incorporated at the National Atomic Energy Commission (CNEA) of Argentina as a result of the newly started nuclear activities in Argentina. Prior that time no Radiobiology research existed in Argentina. To fill this need a Project to create new laboratories was elaborated by the CNEA. New laboratories in Radiobiodosimetry, Cellular Radiobiology, Radiopathology, Radiomicrobiology, Genetics and Somatic Effects were created. Human resources on different areas of Radiobiology were formed with the assistance of IAEA. With professional and technical personnel specialized in Radiobiology at the beginning of the 1970 decade, the transference of fundamental and applied research to others laboratories started. (author)

  13. The health crisis in Argentina.

    Science.gov (United States)

    Escudero, José Carlos

    2003-01-01

    The health crisis in Argentina is part of the larger crisis that has resulted from a collapse in the country's economic and political systems. After a brief review of the country's history over the last century, from international success story to economic failure, the author explains the health crisis in particular and the social crisis in general in terms of failed neoliberal policies imposed on Argentina by the United States and International Monetary Fund through the mediation of the country's political class.

  14. Operating practical experience at Argentina

    International Nuclear Information System (INIS)

    Quihillalt, Oscar

    1997-01-01

    Operating experiences of Atucha-1 and Embalse Nuclear Power Plants were discussed in this work. The technical and economic aspects, such as reliability, availability, personnel training, operating costs, prices and market, which exercise influence upon Argentina nuclear energy policy, mainly on the power electric generation by nuclear power plants were considered. Finally the current status of the nucleoelectric sector in Argentina and forecasting were analysed

  15. Comportamiento del arrastre de partículas en los gases durante el secado del mineral laterítico en tambores cilíndricos rotatorios

    Directory of Open Access Journals (Sweden)

    Alexis García-Pérez

    2000-03-01

    Full Text Available Se utiliza un método estadístico-matemático de planificación de experimentos para la investigación del comportamiento del arrastre de partículas finas en los gases durante el secado del mineral laterítico en uno de los secadores en condiciones normales de operación. En un segundo se eliminaron los levantadores sectoriales en el último tercio del equipo, y se analizó en ambos la influencia de los gases residuales provenientes de la planta de hornos de reducción. Se obtiene la correlación y regresión entre las variables de entrada más importantes que intervienen en el proceso: velocidad de los gases en el interior del cilindro (V, contenido de humedad de los gases (W, y el arrastre de partículas (A como variable de salida. Los resultados obtenidos ofrecen alentadoras perspectivas sobre la generalización industrial de la propuesta.

  16. Norm survey in Argentina

    International Nuclear Information System (INIS)

    Canoba, Analia Cecilia; Gnoni, Gabriela Alejandra; Truppa, W.

    2008-01-01

    The oil and gas industry, which is especially significant in Argentina, is one industry that concentrates natural radionuclides during its processes. In addition, there are a few underground mines under development, where radon levels may be high. The Nuclear Regulatory Authority of Argentina (ARN) carried out a project with the objective of evaluating NORM, mainly in these types of industries. Eight facilities were characterized, three related to the gas industry, four related to the oil industry and a survey of radon gas in a gold underground mine. First, background measurements were made and then a screening survey was carried out to detect values above background. Of the values obtained, 57% were in the background range, 19% were below 2 μSv/h, 15% were in the range 2-10 μSv/h and 9% were above 10 μSv/h. Some values were as high as 400 μSv/h. The annual effective doses were estimated to be in the range 0.02-1.6 mSv/a. Samples were taken and later analysed by gamma spectrometry, liquid scintillation and fluorimetry. It was confirmed that the main radionuclides involved in the oil and gas extraction process are 226 Ra and 228 Ra. The radium isotope concentrations measured in some samples were above the exemption values established by the International Basic Safety Standards. Elevated radon levels were detected in gas facilities and in the gold mine under development. The values obtained in gas facilities showed that radon concentrates in the ethane and propane flows. As the flows in the gas industry are confined, it does not mean an exposure during normal operation. In the case of the gold mine, the values detected were informed to the pertinent authorities as well as the facility in order to take actions to reduce concentrations below the action levels. Finally, protective measures to reduce occupational doses in the cleaning and maintenance processes were suggested, as well as for storage of NORM-contaminated items. (author)

  17. Coccocypselum pulchellum (Rubiaceae, nuevo registro para Argentina

    Directory of Open Access Journals (Sweden)

    Elsa L. Cabral

    2007-01-01

    Full Text Available Se cita Coccocypselum pulchellum por primera vez para Argentina, en Predio Guaraní, Misiones. Esta es la tercera especie de Coccocypselum registrada para la flora de Argentina junto con C. hasslerianum y C. lanceolatum. Se incluyen descripciones, ilustraciones y una clave para reconocer las tres especies argentinas de Coccocypselum.

  18. Argentina: Background and U.S. Relations

    Science.gov (United States)

    2008-11-05

    Comercio Internacional, Y Culto, Comunicado de la Cancillería Argentina, September 11, 2008. 43 A. Rebossio, "Fernández Acusa al FBI de Desestablizar...Argentina," El País (Madrid), September 13, 2008. 44 “Argentina Slams Witness in Cash Suitcase Scandal,” Associated Press Newswires, November 4, 2008

  19. Climatology of hail in Argentina

    Science.gov (United States)

    Mezher, Romina N.; Doyle, Moira; Barros, Vicente

    2012-10-01

    The annual cycle, annual and seasonal frequency and geographical distribution of hail in Argentina during the 1960-2008 period are examined. Eight regions covering the whole territory were defined based on the correlation of the mean annual hail frequency between all weather stations. Regions lying between 30° and 40°S as well as those dominated by mountains present the highest hail frequencies in Argentina. The eastern and coastal areas of the country experience hail events mainly during springtime but they may start in late winter and continue through the beginning of summer. Events in western and central Argentina also predominate in spring but the maximum frequencies are observed during summer months. Trends in the annual number of hail events calculated for each region indicate that events in northwestern and northeastern Argentina have been increasing as well as in southern Patagonia. On the other hand, in central Argentina, southern Buenos Aires-La Pampa, northern Buenos Aires-Litoral and northern Patagonia trends are negative and statistically significant in the first two regions, basically by the decrease of events during spring and summer.

  20. Nuclear Activities in Argentina, 2010

    International Nuclear Information System (INIS)

    Ferreri, J.C.; Ferreri, J.C.; Clausse, A.; Clausse, A.; Clausse, A.; Ordonez, J.P.; Mazzantini, O.A.

    2011-01-01

    Nuclear activities in Argentina are restarted. After almost two decades of near stagnation, the governments political decision of August 2006 regarding electrical energy production, considered the nuclear option as a valid one to solve the problems of the growing demand of electrical energy. This decision triggered again the activities related to the finalization of the third nuclear power reactor (Atucha-II), now actively progressing, the construction of a prototype of the CAREM integral advanced reactor, the life extension of the Embalse CANDU nuclear power plant (NPP) and the studies for the emplacement of a fourth NPP in an appropriate site. In all those years of near stagnation, there were notable exceptions related to the design and construction of experimental and radioisotope production reactors, led by INVAP, a state-owned industry, which exported its production. The accompanying industries of nuclear fuel elements production also remained active, given the demand of the two active NPPs. Meanwhile, the National Atomic Energy Commission of Argentina continued the efforts on research and development that were at the base of the technological achievements of the nuclear activities in Argentina. Nuclear safety studies associated with Atucha II and Embalse NPPs and radiological safety were also a substantive part of the continued efforts by Nucleo-Electrica de Argentina SA and the Nuclear Regulatory Authority of Argentina

  1. Country watch. Argentina.

    Science.gov (United States)

    Perez, P

    1994-01-01

    The Argentine Network of Women Living with HIV/AIDS (ANW) provides general information about acquired immunodeficiency syndrome (AIDS), assistance in assessing medications through state and private services, and information concerning and referrals to nongovernmental organizations (NGOs) and governmental social services to low income women who have been diagnosed with human immunodeficiency virus (HIV) infection. Workshops allow the women to become more active on their own behalf and contribute to the reorientation of health and social services to better meet their needs. Due to the stigma attached to AIDS in Argentina, ANW works to ensure the human rights of these women through participation in the Ministry of Interior Programme against Discrimination and in public events that inform the community about the concerns of HIV positive women with regard to discrimination. A bulletin provides scientific and medical information, news on activities, model advocacy and policy statements, and addresses of support agencies. Contributions are accepted from all HIV positive women. In order to reach isolated cases outside of the capital, links are maintained with other AIDS organizations in the nation.

  2. Argentina and Brazil

    International Nuclear Information System (INIS)

    Gamba-Stonehouse, V.

    1991-01-01

    This paper reports that security is defined in different ways by many international actors. To some, security is tied to the definition of an external threat to borders, as in the case of the NATO countries. To other, security is related to development, as in the case of most Third World countries. but notwithstanding different definitions, all countries recognize that the essence of security is the survival of the nation-state itself. The nuclear programs of Argentina and Brazil are among the oldest, most sophisticated and advanced nuclear programs anywhere in the Third World. The programs have never been explained on the basis of threat perception, and in this regard perhaps they constitute the most atypical form of nuclear proliferation known to date. Not surprisingly, any attempt to explain the rationale for the Brazilian and Argentine nuclear programs based on common issues of threat =merely confuses the issue. Thus, nationalism, the search for national identity and pride, the need to express self-sufficiency and the desire to keep options open in an insecure and evolving world order must all be analyzed to comprehend the likelihood of future types of nuclear proliferation. Meanwhile, the study of the contemporary era of Argentine-Brazilian nuclear rapprochement may provide new insights into the complex reasoning behind the decision of countries to go nuclear

  3. Pampa Húmeda, Argentina

    Directory of Open Access Journals (Sweden)

    Néstor C. Di Leo

    2007-01-01

    Full Text Available La radiación fotosintéticamente activa (PAR es importante como variable de entrada de energía en diversos procesos biológicos y su evaluación temporal tiene particular interés en el monitoreo de cultivos. Los datos de reflectancia espectral, obtenidos mediante sensores remotos, son adecuados para proporcionar observaciones de fenómenos que se relacionan con aspectos ecofisiológicos de las cubiertas vegetales, incluyendo a la productividad primaria neta (NPP. Ésta constituye una de las pocas fuentes de información acerca de los procesos del ciclo del carbono en escalas regionales o globales. La NPP se relaciona con la eficiencia del uso de la luz a través de la radiación fotosintéticamente activa absorbida (APAR y representa un indicador agroecológico de utilidad para valorar la utilización productiva del territorio. El objetivo de este trabajo es presentar un aporte metodológico a la agroecología, mediante las caracterizaciones de la NPP y la APAR, en tres situaciones geográficas y productivas de la Pampa Húmeda, Argentina.

  4. Crisis de la prensa Argentina

    Directory of Open Access Journals (Sweden)

    Federico Rey Lennon

    2015-01-01

    Full Text Available La magnitud de la crisis económica Argentina es enorme y difícil saber hasta cuando se extenderá, agravada por una situación política frágil. La actual recesión ha hecho caer la inversión publicitaria a los niveles más bajos de los últimos años. De 1997 al 2001 la circulación de la prensa Argentina cayó en el 36 por ciento. El riesgo en Argentina es la eventual extranjerización de casi todos los medios de comunicación.

  5. Datos experimentales de la cinética del secado y del modelo matemático para pulpa de cupuaçu (Theobroma grandiflorum en rodajas Kinetic drying experimental data and mathematical model for cupuaçu pulp (Theobroma grandiflora slices

    Directory of Open Access Journals (Sweden)

    Abraham Damian Giraldo-Zuniga

    2010-03-01

    Full Text Available En este trabajo fueron obtenidos experimentalmente la cinética del secado de la pulpa de cupuaçu en forma de rodajas con espesor de 0,5 cm. El secado fue realizado utilizándose un secador laboratorial de bandejas, a las temperaturas de 50, 60 y 70 ºC y a la velocidad del aire de secado de 1,5 m/s. De acuerdo con los datos de la cinética del secado se puede observar que cuanto mayor es la temperatura del secado mayor es la velocidad del secado. El tiempo requerido para secar el producto hasta una humedad del 20%, fueron 9,2, 8,1 y 7,3 horas para las temperaturas de secado de 50, 60 y 70 ºC respectivamente. Las curvas experimentales del secado fueron ajustados al modelo difusional de Fick considerándose la muestra como una lámina infinita y al modelo de Page. Los dos modelos se ajustaron bien a los datos experimentales. Los coeficientes de difusión del modelo de Fick variaron de 1.171 a 1.561 m/s².This work examined experimentally the kinetics of drying cupuaçu pulp (Theobroma grandiflorum slices. The experimental runs were driven in a laboratory dryer, at temperatures of 50, 60 and 70 ºC and an air drying velocity of 1.5 m/s. According to the kinetics study, increasing the temperature led to a decrease in drying time. The required drying times were 9.2, 8.1 and 7.3 hours for drying temperatures of 50, 60 and 70 ºC respectively. The experimental drying curves were adjusted to Fick's diffusional model for an infinite lamina with shrinkage and Page model. The diffusion coefficients of the Fick model varied between 1.171 and 1.561 m/s².

  6. Modelación del secado neumático vortiginoso del bagazo de la caña de azúcar//Modulation of sugar cane bagasse pneumatic drying in a vortex

    Directory of Open Access Journals (Sweden)

    Eugenio F. Bombino-Matos

    2013-09-01

    Full Text Available Tomando en consideración los estudios realizados sobre la modelación del movimiento vortiginoso de partículas de bagazo, se realizó el estudio del secado neumático de esta importante biomasa teniendo en cuenta la transferencia de calor y de masa. Se modeló el proceso de secado a través de las ecuacionesfundamentales que describen la cinética del mismo y se compararon los resultados obtenidos con resultados reportados en la literatura especializada sobre mediciones de la variación del contenido de humedad en otros tipos de secadores neumáticos de bagazo para iguales condiciones de operación. Esta modelación permitió realizar simulaciones de este proceso las cuales arrojaron resultados aceptables en cuanto a los valores de disminución del contenido de humedad del bagazo lo que permitirá continuar profundizando en el desarrollo de próximos estudios sobre el tema ya que se evidencia que por esta vía es posible disminuir las dimensiones de los secadores de bagazo.Palabras claves: secado neumático vortiginoso, secado de bagazo, modelación matemática.______________________________________________________________________________AbstractTaking in account the studies carried out about the vortex movement of bagasse particles, the study of pneumatic drying of this important biomass was carried out considering the heat and mass transfer. The drying process was modeled through the fundamentals equations which describe the kinetic of it and theobtained results were compared with results reported in the specialized literature on drying measurements in others kinds of bagasse pneumatics dryers under the same conditions of operation. This modulation permitted to made simulations of this process which produced acceptable results about the decrease humidity values of bagasse and it will permit to continue in the development of next studies about this topic because it is evident that it is possible to reduce bagasse dryer dimensions.Key words

  7. Diseño de un espesador por gravedad y eras de secado para los lodos producidos en la planta de tratamiento de agua potable Acueductos La Enea Ltda.

    OpenAIRE

    Holguín Isaza, Carlos Andrés

    2003-01-01

    En el presente trabajo se realiza una caracterización de las aguas de lavado de filtros y decantadores de la planta de tratamiento de agua potable “Acueductos la Enea Ltda.”, realizándole ensayos de caudal, sólidos sedimentables y sólidos suspendidos totales. Se diseña además un sistema de espesamiento por gravedad y secado en lechos de arena y grava para los lodos producidos durante el lavado de los decantadores y filtros, por medio de los datos obtenidos a nivel de laboratorio, a nivel pilo...

  8. Availability of solar radiation and standards for solar access

    Energy Technology Data Exchange (ETDEWEB)

    Casabianca, G.A.; Evans, J.M. [Research Centre Habitat and Energy, Facultad de Arquitectura, Diseno y Urbanismo, Universidad de Buenos Aires, Capital Federal (Argentina)

    1997-12-31

    In southern Argentina, a region between latitudes 38 deg C and 55 deg C S, the heating demand in the residential sector is high while the availability of solar radiation is limited. A new proposal for solar access standards has been developed, taking into account the climatic conditions of each location, the effective availability of solar radiation and the direct sunlight requirements. This study analyses the climatic conditions for the Patagonia, relating heating demand and solar radiation availability in different sites, and presents the development of new sunlight standards that respond to these regional conditions. As a result of this study, the new Argentine standard TRAM 11.603 includes new conditions to protect solar access and provide design recommendations. (orig.) 4 refs.

  9. Ahorros en los consumos para enfriamiento de espacios interiores mediante la evaluación de sistemas de protección solar en edificios residenciales en altura. El caso de la "ciudad-oasis" de Mendoza, Argentina

    Directory of Open Access Journals (Sweden)

    Julieta Balter

    2016-06-01

    Full Text Available El presente trabajo estudia el comportamiento térmico y energético de edificios residenciales en altura, en el contexto particular de una “ciudad-oasis”. Se plantea como objetivo la definición de sistemas de control solar adecuados en la envolvente para cada tipología material de edificio -másica y liviana- y para cada estrato en altura de las viviendas: debajo y sobre de la copa de los árboles. El monitoreo de viviendas en uso permite validar modelos geométricos (software Energy Plus y simular propuestas de aplicación de elementos de protección solar. Se analizan los ahorros en los consumos para enfriamiento en departamentos en niveles bajos, medios y altos. Los resultados muestran que en el edificio másico, en las viviendas ubicadas debajo de la copa de los árboles, es posible anular las cargas energéticas para enfriamiento mediante el uso de elementos exteriores de protección solar. Mientras que en las viviendas sobre la copa de los árboles, los ahorros energéticos se encuentran entre el 32% y 42%. En el edificio liviano, la aplicación de sistemas de control en departamentos bajo la copa de los árboles alcanza ahorros del orden del 53% y en las viviendas sobre la copa, las reducciones energéticas se encuentran entre el 46% y 54%. Las dimensiones adecuadas de tales elementos pueden generar propuestas posibles de ser transferidas a las normativas locales de edificación. 

  10. NREL technical assistance to Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Lilienthal, P. [National Renewable Energy Lab., Golden, CO (United States)

    1997-12-01

    This paper describes assistance to Argentina from the National Renewable Energy Laboratory which has touched on four programs: tariff analysis for rural concessions programs; wind/diesel hybrid retrofits in Patagonia; small hybrid systems designs for rural schools; an assessment of wind resources. The paper expands briefly on the first two points.

  11. Influencia de la adición de un 2% de carbonato de calcio en el proceso de fabricación de los ladrillos de cerámica roja: etapas de secado y cocción

    Directory of Open Access Journals (Sweden)

    Dania Betancourt

    2013-08-01

    Full Text Available El trabajo hace un estudio de la influencia de la adición del 2% de carbonato de calcio en la duración de la etapa de secado y la eficiencia de la etapa de cocción durante el proceso de fabricación de ladrillos de cerámica roja. Dicho estudio se realizó en una fábrica que produce ladrillos huecos con una capacidad instalada de 65000 ladrillos por cada quema .Los resultados del estudio realizado demostraron que la adición de un 2% de CaCO3 a la pasta arcillosa disminuye el tiempo de secado en un 35% con respecto a los ladrillos elaborados sin adición y provoca una disminución del consumo de combustible del 27 % con respecto a quemas anteriores realizadas sin la adición de este fundente debido a la reducción del tiempo de cocción en los hornos.

  12. Aplicación de modelos matemáticos al proceso de secado asistido por infrarrojos de descartes de limón (Citrus limon (L. Burm. F. Cv. Genova

    Directory of Open Access Journals (Sweden)

    Luis Puente-Díaz

    2013-01-01

    Full Text Available Los desechos agroindustriales son uno de los principales problemas ambientales a nivel mundial. Debido a las altas exigencias de calidad, la comercialización de limones de exportación genera grandes cantidades de desechos. Los descartes de limón contienen fibra, pectina, potasio, calcio y vitamina C. Por lo tanto, es importante desarrollar alternativas de procesamiento de estos sub-productos para agregarles valor y aumentar su vida útil. El objetivo de la presente investigación fue la aplicación del secado asistido por infrarrojos, como tecnología emergente, para estudiar el efecto de la temperatura de proceso sobre las cinéticas de secado de descartes de limón a 30, 40 y 50°C. Se utilizaron seis modelos matemáticos de capa fina encontrados en literatura para representar la cinética experimental. Basándose en análisis estadístico, el modelo Logarítmico presentó el mejor ajuste. Los valores de la difusividad efectiva del agua se estimaron en el rango de 9.45× 10-10 – 3.71× 10-9 m/s2. El valor de la energía de activación fue 55.90 kJ/mol.

  13. Nuclear Energy Stakeholders in Argentina

    International Nuclear Information System (INIS)

    Gadano, Julian

    2017-01-01

    Mr Gadano, Undersecretary for Nuclear Energy, Argentina spoke from the perspective of a country looking forward to becoming a member of the NEA. He reviewed the place of nuclear energy in his country's energy mix and called attention to its role in positively addressing the global challenges of climate change and energy security. Mr Gadano also described the federal system which governs Argentina. Drawing on his expertise as a lawmaker and nuclear regulator but also as an academic sociologist, he stressed that reaching agreement on siting initiatives for example requires a sustainable relation with stakeholders, including regional governments. This is important because in the end, 'the best project is the one you can finish'

  14. Public information activities in Argentina

    International Nuclear Information System (INIS)

    Espejo, Hector

    1998-01-01

    This is a presentation involving a description of the main guidelines and conditions under which nuclear activities have been performed in Argentina, both concerning the autonomous development for the peaceful use of nuclear energy and with regard to the way in which the community was informed of the attained levels. The particulars of each approach are shown as to delineate historical evolution as a function of the various stages of technological development. (author)

  15. The energy sector in Argentina

    International Nuclear Information System (INIS)

    2016-01-01

    This article first outlines that Argentina produces an important part of its hydrocarbon consumption and comment various aspects of this production: hydrocarbons are at the heart of the Argentinian energetic model; conventional hydrocarbon reserves are however decreasing; the public operator remains the main actor even though the market is opened to multinational companies. The article then describes the crisis faced by this energetic model: the energy balance is now a burden; the increasing unbalance between production and consumption can be explained by supply-related as well as demand-related factors; authorities must intervene on hydrocarbon prices and subsidize the oil price on the domestic market. It appears that the future for hydrocarbons in Argentina relies on non-conventional hydrocarbons. Bio-fuels, a key sector of the Argentinian economy, are a matter of trade dispute with the EU and the USA. Apart from hydroelectricity (some new projects are planned), renewable energies are very few developed in Argentina. Appendices propose a graph of the distribution of energy consumption among the different sources, a map indicating locations of the main exploited hydrocarbon deposits, a presentation of mechanisms implemented to subsidize hydrocarbon production

  16. Rendimiento de aceite esencial en Pinus caribaea MorElet según el secado al sol y a la sombra. III

    Directory of Open Access Journals (Sweden)

    Rolando Quert Álvarez

    2001-04-01

    Full Text Available Se presentan los resultados obtenidos en la determinación del rendimiento de aceite esencial Pinus caribaea Moralet (pino macho, en función de las condiciones y tiempo de exposición al sol y a la sombra del follaje de dicha especie endémica de Cuba. El estudio se realizó con árboles existentes en áreas de la Estación Experimental Forestal de Viñales, provincia de Pinar del Río con edad de 30 a. El tamaño de muestra fue de 3 árboles y el tiempo de destilación para la extracción del aceite esencial de 3 h. Se tomaron muestra del follaje entre 1 y 20 d expuesto a las condiciones de secado, en intervalos de 1, 3, 6, 10 y 20 d. Los resultados obtenidos demostraron que el follaje expuesto a la sombra contiene un mayor porcentaje de aceite esencial que el follaje expuesto al sol, y que el tiempo de exposición al sol, influye significativamente sobre el rendimiento a partir del tercer día, mientras que en el follaje expuesto a la sombra, las diferencias se hacen significativas a partir de los 6 d.The results obtained in the determination of the yield of the essential oil from Pinus caribaea Moralet (male pine according to the conditions and time of exposure to the sun and to the shade of the foliage of this Cuban endemic species are presented. Trees of 30 years old located in the areas of the Experimental Forestal Station of Viñales, Pinar del Río province, were used in the study. The size of the sample was of 3 trees and the time of distillation for the extraction of the essential oil was of 3 hours. Specimens of the foliage were taken at intervals of 1, 3, 6, 10 and 20 days. The results obtained showed that the foliage exposed to the shade has a higher percentage of essential oil that the foliage exposed to the sun, and that the time of exposure to the sun influences significantly on the yield starting from the third day on, whereas in the foliage exposed to the shade the differences are remarkable from the sixth day on.

  17. Microencapsulación de sustancias oleosas mediante secado por aspersión Microencapsulation of oily substances by aspersion drying

    Directory of Open Access Journals (Sweden)

    Orestes Darío López Hernández

    2010-09-01

    Full Text Available Para administrar por vía oral compuestos oleosos como los extractos lipídicos de origen natural, los aceites esenciales volátiles y las vitaminas liposolubles, se hace necesario presentarlos en forma de cápsulas blandas. Una alternativa a esta forma de presentación es la microencapsulación, que ofrece una solución para modificar el estado físico y presentarlos en una forma sólida para su administración por vía oral. Esta alternativa permite enmascarar el olor y sabor desagradable de productos que van a ser administrados por vía oral, además de proteger de la oxidación a los ácidos grasos presentes. El secado por aspersión es uno de los métodos más utilizados a escala industrial para la obtención de microcápsulas. Debido a su creciente uso en la industria farmacéutica, en el presente trabajo se recopila el estado del arte en el uso de esta tecnología para la microencapsulación de sustancias oleosas.To administer oral oily compounds such as lipid extracts of natural origin, volatile essential oils and liposoluble vitamins, it is necessary that presentation be in soft capsulae. An alternative to this form of presentation is the microencapsulation being a solution to modify the physical state and to achieve a solid form for its oral administration. This alternative allows masking the smell and the unpleasant flavor of oral products ant also to protect the oxidation of fatty acids present. The aspersion dry is one of the more used methods at industrial scale to microcapsulae achievement. Because of its increasing use in pharmaceutical industry in present paper is gathered the art of state in the use of this technology for oily substances microencapsulation.

  18. Boll weevil invasion process in Argentina

    Science.gov (United States)

    The boll weevil, Anthonomus grandis grandis Boheman, is the most destructive cotton pest in the Western Hemisphere. In 1993, the pest was reported in Argentina, and in 1994 boll weevils were captured in cotton fields in the Formosa Province on the border between Argentina and Paraguay. The pest ha...

  19. Communications received from Argentina and Brazil

    International Nuclear Information System (INIS)

    1989-01-01

    The document reproduces the Joint Statement on Nuclear Policy signed by the President of Argentina and the President of Brazil on 29 November 1988 at Ezeiza, Argentina, concerning the decision of the two countries to undertake a joint fast breeder reactor project

  20. Mida õpetab Argentina finantskriis? / Karsten Staehr

    Index Scriptorium Estoniae

    Staehr, Karsten, 1962-

    2002-01-01

    Norra majandusanalüütik kirjeldab Argentina majanduspoliitikat, analüüsib tehtud vigu ning hoiatab avatud majandusega Eestit võimalike tulevaste välisshokkide eest. Diagramm: SKP kasv ja üleüldine riigieelarve tasakaal 1991-2001 Argentinas

  1. Efecto del secado de los biosólidos de la planta de tratamiento de aguas residuales El Salitre (Bogotá sobre su contenido de nutrientes, metales pesados y patógenos

    Directory of Open Access Journals (Sweden)

    Giraldo Óscar

    2006-12-01

    Full Text Available

    Se acondicionó el biosólido proveniente  de la planta de tratamiento de aguas residuales El Salitre, en Bogotá, para su uso agrícola o forestal, de tal manera que el producto obtenido se encontrara dentro de los límites máximos permisibles de contaminantes establecidos por la estadounidense Environmental Protection Agency (EPA y su contenido de nutrientes se afectara en la menor proporción posible. Se realizaron tratamientos térmicos a temperaturas de 50, 55, 60, 65 y 70 °C, y se determinó el contenido de coliformes totales, E. coli y Salmonella, el contenido de nutrientes totales (N, P, K y metales pesados disponibles (Cd, Cr, Cu, Mn, Ni, Pb, Zn, antes y después de cada uno de los tratamientos. Los tratamientos de secado entre 55-70 °C redujeron los coliformes totales y E. coli hasta niveles apropiados para que el biosólido pueda ser utilizado en aplicaciones forestales. Aunque los contenidos de nutrientes del producto se redujeron entre 75% y 95%, aún se considera apropiados para su utilización como fertilizante. Los metales Cu y Zn aumentaron sus contenidos disponibles después de los tratamientos, Cd y Cr no fueron detectados y los contenidos de  algunos metales pesados (Mn, Ni, Pb se redujeron con el proceso de secado. Sin embargo, para  todos  los metales los valores se encontraron por debajo de los límites establecidos por la EPA para la aplicación del biosólido en terrenos agrícolas. Se concluyó que el tratamiento de secado de biosólido puede considerarse como una opción válida para su acondicionamiento para uso forestal.

  2. Solar Indices - Solar Flares

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  3. Solar Indices - Solar Ultraviolet

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  4. Solar Indices - Solar Corona

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  5. Solar Indices - Solar Irradiance

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  6. Greenstone: uso actual en Argentina

    Directory of Open Access Journals (Sweden)

    Marcela Fushimi

    2018-04-01

    Full Text Available Este trabajo presenta las características e historia del software para crear y gestionar bibliotecas digitales Greenstone, desarrollado inicialmente por la Universidad de Waikato, Nueva Zelandia en 1997. En primer lugar, se describe la comunidad de usuarios a nivel global, focalizando en el uso actual que el software ha alcanzado en Argentina: la cantidad de implementaciones disponibles, su evolución, el tipo, tamaño y variedad de los desarrollos existentes, así como su aplicación a la gestión de repositorios digitales de ciencia y tecnología en el ámbito de las instituciones científicas, tecnológicas y de educación superior en Argentina. En segundo lugar, se detallan las acciones llevadas a cabo a partir de la creación del Centro Nacional de Promoción de Greenstone en Argentina en 2009. Datos recabados en encuestas realizadas permitieron observar que las razones predominantes para elegir esta plataforma fueron, entre otras, su facilidad de instalación y configuración, su bajo nivel de requerimiento tecnológico, la generalizada escasez de recursos humanos dedicados a esta actividad, y la complejidad que presentaban los softwares alternativos existentes en ese momento. A lo largo de estos 8 años, tanto los repositorios digitales como los sistemas que los soportan evolucionaron drásticamente, modificando el escenario actual. Paralelamente, en 2016 la nueva versión mayor de Greenstone implementó una reingeniería completa del software para su adaptación a las tecnologías en uso: XML, XSLT, Web-services y Java. Como consecuencia de esto, la comunidad de desarrollo local se plantea nuevos desafíos para la migración de las bibliotecas digitales y repositorios implementados con versiones anteriores.

  7. Bioceres: AG Biotechnology from Argentina

    Directory of Open Access Journals (Sweden)

    Roberto Feeney

    2016-04-01

    Full Text Available In this case we present a business decision-making situation in which the CEO of an Argentine Ag Biotech company, Bioceres, has to decide the best way to commercialize a new drought-tolerant transgenic technology. The company was founded by twenty three farmers, who shared a common dream that Argentina could become a benchmark in the development of Ag biotechnology. The case has strategic and financial implications, as well as decision-making situation involving a joint venture with an American biotechnology company. It also introduces to discussion the business models of Ag biotechnology companies in developing countries.

  8. Soybean biomass produced in Argentina

    DEFF Research Database (Denmark)

    Semino, Stella Maris; Paul, Helena; Tomei, Julia

    2009-01-01

    Soybean biomass for biodiesel, produced in Argentina amongst other places, is considered by some to reduce greenhouse gas emissions and mitigate climate change when compared with fossil fuel. To ensure that the production of biofuels is ‘sustainable', EU institutions and national governments...... are currently designing certification schemes for the sustainable production of biomass. This paper questions the validity of proposed environmental standards, using the production of Argentine soybean as a case study. The production of soybean production is associated with profound environmental impacts...

  9. Kinetic Study of Convective Drying of Blueberry Variety O’neil (Vaccinium corymbosum L. Estudio de la Cinética del Secado Convectivo de Arándano Variedad O’Neil (Vaccinium corymbosum L.

    Directory of Open Access Journals (Sweden)

    A Vega-Gálvez

    2009-06-01

    Full Text Available The aim of this research was to study and to model the drying kinetics of the blueberry Vaccinium corymbosum L. at three temperatures (60, 70 and 80 ºC with an airflow of 2.0 ± 0.2 m s-1. Modeling of the desorption isotherm was carried out with the GAB (Guggenheim, Anderson and de Boer equation, showing a good fit to experimental moisture data, giving as a result a monolayer moisture level of 0.084 g water g-1 dm. Newton, Henderson-Pabis, Page, Modified Page and Logarithmic mathematical models were applied in the study and in the modeling of the drying kinetics of this fruit. Kinetic parameters k of each model showed dependence on temperature, and were evaluated by an Arrhenius-type equation, with an activation energy of between 36.2 and 54.5 kJ mol-1. Logarithmic and Modified Page models gave the best fits for each drying curve, based on the statistical test determination coefficient, sum square error, root mean sum errors and Chi-square. In consequence, both models are excellent tools for estimating the drying time of this product.El objetivo de esta investigación fue estudiar y modelar la cinética de secado del arándano ( Vaccinium corymbosum L. a tres temperaturas (60, 70 y 80 ºC con un flujo de aire de 2,0 ± 0,2 m s-1. El modelado de la isoterma de desorción se llevó a cabo con la ecuación de GAB (Guggenheim, Anderson y de Boer, mostrando un buen ajuste sobre los datos experimentales de humedad, dando como resultado una humedad de la monocapa de 0,084 g de agua g-1 ms. Se aplicaron los modelos matemáticos de Newton, Henderson-Pabis, Page, Page modificado y Logarítmico para el modelado de la cinética de secado de esta fruta. Los parámetros cinéticos k de cada modelo presentaron dependencia con la temperatura, evaluadas por una ecuación de tipo Arrhenius, con una energía de activación entre 36,2-54,5 kJ mol-1. Los modelos Logarítmico y Page modificado obtuvieron el mejor ajuste para cada curva de secado, basado en las

  10. Efecto del secado en ambiente de servicio en la evolución de las propiedades mecánicas de hormigones livianos estructurales Effect of drying under service environment on the mechanical properties of structural lightweight concretes

    Directory of Open Access Journals (Sweden)

    Carlos Videla

    2007-08-01

    Full Text Available En este trabajo se evalúa el efecto de la humedad relativa del ambiente de servicio en las resistencias a compresión y a tracción y en el módulo de elasticidad de hormigones livianos estructurales. Además se establecen relaciones que permiten estimar estas propiedades en función de la humedad relativa del ambiente y del tiempo de secado. Los hormigones se fabricaron con dos tipos de áridos gruesos livianos, piedra pómez y pellets de ceniza volante, y con un árido fino de densidad normal. Los hormigones se sometieron a dos condiciones ambientales de servicio: una a 90% de humedad relativa y otra a 90% de humedad relativa durante los 7 primeros días y luego a 50% de humedad relativa hasta la edad de ensayo. Los ensayos se efectuaron a 7, 28, 60 y 90 días de edad. Se observó un deterioro importante de las propiedades medidas por efecto de las condiciones de secado; a 83 días de secado, en promedio las pérdidas de resistencia a tracción y compresión fueron de 20% y 15%, respectivamente, y de módulo de elasticidad de 40% respecto a hormigones a 90% de humedad relativa. Se concluye que hay dos variables principales que regulan el efecto del secado en el hormigón liviano. La primera de éstas corresponde a razón agua-cemento y que define entre otras cosas la permeabilidad de la fase resistente. La otra variable corresponde al contenido relativo de árido liviano en la mezclaIn this paper the effect of the ambient relative humidity at service on the compressive and splitting strengths and in the modulus of elasticity of structural lightweight concretes is evaluated. Also, relationships are proposed allowing estimating these properties as a function of the ambient relative humidity and drying time. The concretes were made with two types of coarse lightweight aggregates, pumice and fly ash pellets, and with normal density fine aggregate. The concretes were subjected to two different environmental service conditions: 90% relative

  11. Determinación de la condición fisiológica de la semilla de Capsicum spp y efecto del método de secado para su almacenamiento.

    Directory of Open Access Journals (Sweden)

    Cardozo C. I.

    2004-04-01

    Full Text Available Semillas del género Capsicum se caracterizaron fisiológicamente. Basados en datos de viabilidad y germinación se estimó la tolerancia a la desecación y conservación por lo cual se estableció la condición ortodoxa de las semillas. Sin embargo, se destaca la importancia de la variable vigor, que permitió establecer diferencias entre las especies respecto de su longevidad y deducir que los contenidos de humedad de 10% y 7.5% y temperatura de 10°C admiten mayor capacidad de conservación. Los cuatro métodos de secado (secado artificial, sílica gel, sol y sombra y los dos sistemas de ambiente controlado no presentaron diferencias significativas en viabilidad. Se detectaron niveles moderados de latencia en las semillas que pudieron interferir en la interpretación de los resultados. Palabras claves: C. annuum, C. frutescens, C. baccatum, viabilidad, germinación. ABSTRACT Determination of physiological status of Capsicum spp seed and efect of the dry method for storage. Capsicum spp seeds was physiologycal characterizated. Based on data of viability and germination to estimate the tolerance to drying and conservation, the orthodox condition of the seeds could be established. Nevertheless, the importance of the variable vigor stands out, that allowed to establish differences between the species with respect to its longevity, It was settled down that 10 and 7.5% of humidity contents and temperature of 10°C allow greater capacity of conservation. The four methods of seed drying and the capacity of conservation under two different controlled environment systems were not significant differences. Moderate levels of the seed dormancy could be interfered the interpretation of the results. Keywords: C. annuum, C. frutescens, C. baccalum, viability, germination

  12. Education in acoustics in Argentina

    Science.gov (United States)

    Miyara, Federico

    2002-11-01

    Over the last decades, education in acoustics (EA) in Argentina has experienced ups and downs due to economic and political issues interfering with long term projects. Unlike other countries, like Chile, where EA has reached maturity in spite of the acoustical industry having shown little development, Argentina has several well-established manufacturers of acoustic materials and equipment but no specific career with a major in acoustics. At the university level, acoustics is taught as a complementary--often elective--course for careers such as architecture, communication engineering, or music. In spite of this there are several research centers with programs covering environmental and community noise, effects of noise on man, acoustic signal processing, musical acoustics and acoustic emission, and several national and international meetings are held each year in which results are communicated and discussed. Several books on a variety of topics such as sound system, architectural acoustics, and noise control have been published as well. Another chapter in EA is technical and vocational education, ranging between secondary and postsecondary levels, with technical training on sound system operation or design. Over the last years there have been several attempts to implement master degrees in acoustics or audio engineering, with little or no success.

  13. Sistema de salud de Argentina The health system of Argentina

    Directory of Open Access Journals (Sweden)

    Mariana Belló

    2011-01-01

    Full Text Available En este artículo se describe el sistema de salud de Argentina, que está compuesto por tres sectores: público, de seguridad social y privado. El sector público está integrado por los ministerios nacional y provincial, y la red de hospitales y centros de salud públicos que prestan atención gratuita a toda persona que lo demande, fundamentalmente a personas sin seguridad social y sin capacidad de pago. Se financia con recursos fiscales y recibe pagos ocasionales de parte del sistema de seguridad social cuando atiende a sus afiliados. El sector del seguro social obligatorio está organizado en torno a las Obras Sociales (OS, que aseguran y prestan servicios a los trabajadores y sus familias. La mayoría de las OS operan a través de contratos con prestadores privados y se financian con contribuciones de los trabajadores y patronales. El sector privado está conformado por profesionales de la salud y establecimientos que atienden a demandantes individuales, a los beneficiarios de las OS y de los seguros privados. Este sector también incluye entidades de seguro voluntario llamadas Empresas de Medicina Prepaga que se financian sobre todo con primas que pagan las familias y/o las empresas. En este trabajo también se describen las innovaciones recientes en el sistema de salud, incluyendo el Programa Remediar.This paper describes the health system of Argentina.This system has three sectors: public, social security and private.The public sector includes the national and provincial ministries as well as the network of public hospitals and primary health care units which provide care to the poor and uninsured population. This sector is financed with taxes and payments made by social security beneficiaries that use public health care facilities. The social security sector or Obras Sociales (OS covers all workers of the formal economy and their families. Most OS operate through contracts with private providers and are financed with payroll

  14. Argentina to fully privatize state owned YPF

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    Argentina's Congress has voted to fully privatize state petroleum company Yacimientos Petroliferos Fiscales (YPF), a move the government expects to net at least $8 billion. Despite some political opposition, the vote was 119-10 in favor, with one abstention and opposition party members refusing to participate in the vote. Argentina's President Carlos Menem had threatened to authorize YPF privatization by decree if there was no quorum for a vote. YPF is responsible for 40% of Argentina's oil production. The country h as been self-sufficient in crude since 1982. Current production is 563,472 b/d, and proved reserves of oil and gas are valued at $7 billion

  15. Solar building

    OpenAIRE

    Zhang, Luxin

    2014-01-01

    In my thesis I describe the utilization of solar energy and solar energy with building integration. In introduction it is also mentioned how the solar building works, trying to make more people understand and accept the solar building. The thesis introduces different types of solar heat collectors. I compared the difference two operation modes of solar water heating system and created examples of solar water system selection. I also introduced other solar building applications. It is conv...

  16. Solar energy

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This chapter discusses the role solar energy may have in the energy future of the US. The topics discussed in the chapter include the solar resource, solar architecture including passive solar design and solar collectors, solar-thermal concentrating systems including parabolic troughs and dishes and central receivers, photovoltaic cells including photovoltaic systems for home use, and environmental, health and safety issues

  17. Measured radon inside housings the Republic Argentina

    International Nuclear Information System (INIS)

    Canoba, A.; Arnaud, M.; Lopez, F.; Oliveira, A.A.

    1998-01-01

    They have been measured the radon concentration in houses in different city's in Argentina Republic. For they were used it as method mensuration detectors appearances nuclear detecting electrets and detectors based on the adsorption radon in activated carbon

  18. Nuclear Data in Argentina (1992 -1993)

    International Nuclear Information System (INIS)

    Ricabarra, G. H.

    1993-03-01

    A progress report of nuclear data research in Argentina is given for the years 1992/1993, including the WIMS nuclear data library update project, and measurements and evaluations of selected neutron induced nuclear reactions. (author)

  19. Transnational Crime Fictions and Argentina's Criminal State

    OpenAIRE

    Caballero, Juan

    2013-01-01

    My dissertation, titled "Transnational Crime Fictions and Argentina's Criminal State," proposes a new understanding of the dictatorship novels of Ricardo Piglia, Juan José Saer, and Manuel Puig grounded in their shared appropriation from popular crime fiction. Across the 1940's, 50's, and 60's, a wide range of popular crime fiction was translated, written, theorized, printed and reprinted in Argentina, and these popular genres grew steadily in readership, visibility, and cultural legitimacy....

  20. Update on women in physics in Argentina

    Science.gov (United States)

    Brudny, Vera; Lagorio, Cecilia; Frechero, Marisa; Tamarit, Francisco

    2013-03-01

    Data collected 10 years ago in Argentina concluded that women in physics were underrepresented in many instances and that a "crystal ceiling" was firmly in place. We have collected updated data for several indicators and compared them with those obtained 10 years ago. Although there is not a clear conclusion to be drawn from this comparison, we try to explain the results within the framework of the changes in scientific policies in Argentina.

  1. Update on women in physics in Argentina

    OpenAIRE

    Brudny, Vera Leonor; Lagorio, Cecilia; Frechero, Marisa Alejandra; Tamarit, Francisco

    2016-01-01

    Data collected 10 years ago in Argentina concluded that women in physics were underrepresented in many instances and that a “crystal ceiling” was firmly in place. We have collected updated data for several indicators and compared them with those obtained 10 years ago. Although there is not a clear conclusion to be drawn from this comparison, we try to explain the results within the framework of the changes in scientific policies in Argentina. Fil: Brudny, Vera Leonor. Universidad de Buenos...

  2. China, Argentina agree to further strategic ties

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    According to Xinhua,China and Argentina have agreed to further enhance mutual trust and their strategic partnership as the two emerging economies are playing an increasingly important role in the world arena.“China will work with Argentina to strengthen strategic mutual trust,expand cooperation and coordination within multilateral frameworks in order to promote bilateral ties and benefit the two peoples,” Vice President Xi Jinping told Argentine Foreign Minister Hector Timerman on September 9.

  3. Poverty and Health in Argentina

    Directory of Open Access Journals (Sweden)

    Maria Alejandra Silva

    2009-06-01

    Full Text Available This article examines health conditions in the rural areas of Central Argentina, the country’s main region for soy-bean production and export. Health conditions are analyzed through the concepts of emerging and re-emerging diseases in a context of increasing poverty. Data on poverty and health was obtained from both primary sources (trade union, government officials, rural doctors and the South Watch/FA/FODEPAL/UNR working group and secondary sources (IPEC/INDEC, IDESA, Consultora Equis, the Argentine Ministry of Employment, ILO, the Ministry of Health, the Ministry of the Environment, toxicology centers and rural doctors. Analysis of rural health conditions gives cause for concern. There is evidence of deterioration in the social determinants of health such as an increase in rural and urban poverty associated with informal employment and child labor. At the same time lack of government epidemiological and toxicological data appears to hide or distort the reality of health conditions.

  4. An Energy Overview of Argentina

    International Nuclear Information System (INIS)

    2003-01-01

    The DOE Office of Fossil Energy is maintaining a web site that is meant to provide useful business- and energy-related information about countries and regions of the world for exporters, project developers, and researchers. The site consists of more than 130 country pages (organized into seven different world regions), with each country page having its own set of links to information sources about that country. There are also more than 30 Country Energy Overviews at the web site -- each of these is a comprehensive review of a specific country's entire energy situation, including sections on Energy Policy, Oil, Natural Gas, Coal, Hydroelectric/Renewables, Nuclear Power, Energy Transmission Infrastructure, Electricity, Electric Industry Overview, Environmental Activities, Privatization, Trade, and Economic Situation. The specific country highlighted in this Country Energy Overview is Argentina. The site is designed to be dynamic. Updates to the overviews will be made as need and resources permit

  5. Nuclear security standard: Argentina approach

    International Nuclear Information System (INIS)

    Bonet Duran, Stella M.; Rodriguez, Carlos E.; Menossi, Sergio A.; Serdeiro, Nelida H.

    2007-01-01

    Argentina has a comprehensive regulatory system designed to assure the security and safety of radioactive sources, which has been in place for more than fifty years. In 1989 the Radiation Protection and Nuclear Safety branch of the National Atomic Energy Commission created the 'Council of Physical Protection of Nuclear Materials and Installations' (CAPFMIN). This Council published in 1992 a Physical Protection Standard based on a deep and careful analysis of INFCIRC 225/Rev.2 including topics like 'sabotage scenario'. Since then, the world's scenario has changed, and some concepts like 'design basis threat', 'detection, delay and response', 'performance approach and prescriptive approach', have been applied to the design of physical protection systems in facilities other than nuclear installations. In Argentina, radioactive sources are widely used in medical and industrial applications with more than 1,600 facilities controlled by the Nuclear Regulatory Authority (in spanish ARN). During 2005, measures like 'access control', 'timely detection of intruder', 'background checks', and 'security plan', were required by ARN for implementation in facilities with radioactive sources. To 'close the cycle' the next step is to produce a regulatory standard based on the operational experience acquired during 2005. ARN has developed a set of criteria for including them in a new standard on security of radioactive materials. Besides, a specific Regulatory Guide is being prepared to help licensees of facilities in design a security system and to fulfill the 'Design of Security System Questionnaire'. The present paper describes the proposed Standard on Security of Radioactive Sources and the draft of the Nuclear Security Regulatory Guidance, based on our regulatory experience and the latest international recommendations. (author)

  6. Argentina

    Directory of Open Access Journals (Sweden)

    Guillermina Fernández Zambón

    2005-01-01

    Full Text Available La actividad industrial, de cualquier época, tiene una gran importancia para el hombre, pues al igual que el resto de los procesos económicos, es el reflejo del accionar cotidiano de la sociedad sobre el espacio. Considerando esto, el presente articulo tiene como objetivo presentar al patrimonio industrial como recurso para organizar rutas turísticas que permitan en algunos casos recuperar espacios industriales abandonados o usar establecimientos industriales en funcionamiento pero que pueden incorporarse a este tipo de desarrollo turístico. La creación de rutas turísticas puede permitir la reactivación de las economías locales, por constituirse en definitiva en una nueva actividad económica. Para lograr esto es necesario articular el sector público y el privado. De esta forma es posible, a través de la creación de rutas turísticas del patrimonio industrial, generar un desarrollo turístico local sustentable.

  7. Tomato Infrared Drying: Modeling and some Coefficients of the Dehydration Process Secado de Tomate por Infrarrojo: Modelación y algunos Coeficientes del Proceso de Deshidratación

    Directory of Open Access Journals (Sweden)

    Paulo Cesar Corrêa

    2012-06-01

    , el presente trabajo tuvo como objetivo el estudio del proceso de deshidratación en tres diferentes estados de maduración de rebanadas de tomate (Solanum lycopersicum L. por medio del secado por infrarrojo, usando dos métodos: aproximación del período constante de deshidratación a la teoría de la transferencia de calor y masa para el termómetro de bulbo húmedo; y al período decreciente de la deshidratación a la teoría de difusión de líquidos. Se utilizaron frutos de tomate cv. Santa Cruz. Tres estados de maduración fueron obtenidos: verde (estado 1, naranja (estado 2 y rojo (estado 3. Modelos matemáticos usualmente utilizados para representar el secado de productos agrícolas fueron ajustados a los datos experimentales del secado de tomate. El coeficiente de difusión efectivo fue obtenido por medio del ajuste del modelo matemático de difusión líquida a los datos experimentales del período decreciente de deshidratación. El modelo Dos Términos representó mejor el proceso del secado de rebanadas de tomate. La humedad crítica para la deshidratación de tomate fue 2.97 kgw kgdm-1. Existe un período inicial de deshidratación en que la tasa de secado alcanzó el máximo (aproximadamente 1.05 kgw kgdm-1, alrededor de 3 min. Tres diferentes métodos fueron utilizados para obtener los valores del coeficiente efectivo de difusión, incluyendo el método de elementos finitos, en que presentó los menores valores de la suma de desviaciones mínimas al cuadrado, 1.00 x 10-7 m² s-1. El coeficiente global de transferencia de calor fue 12.45 W m-2 K-1, y el coeficiente global de transferencia de masa fue 0.0105 m s-1.

  8. Commercial dissemination approaches for solar home systems

    Energy Technology Data Exchange (ETDEWEB)

    Terrado, E.

    1997-12-01

    The author discusses the issue of providing solar home systems to primarily rural areas from the perspective of how to commercialize the process. He considers two different approaches, one an open market approach and the other an exclusive market approach. He describes examples of the exclusive market approach which are in process in Argentina and Brazil. Coming from a banking background, the business aspects are discussed in detail. He points out the strengths and weaknesses of both approaches toward developing such systems.

  9. S, Zn, Cr, Cu and Fe changes during fluvial sediments oxidation Transformaciones del S, Zn, Cr, Cu y Fe en sedimentos fluviales durante el proceso de secado

    Directory of Open Access Journals (Sweden)

    María Pía Di Nanno

    2009-12-01

    cambios generados por potencial redox. El objetivo del presente trabajo fue el de evaluar cambios en las formas de azufre, metales (Zn, Fe, Cr y Cu y aumento de acidez generado por la oxidación de sedimentos contaminados durante un proceso de oxidación controlado. Se midió, sobre sedimentos en proceso de desecación y durante 36 días, sulfuros, sulfuros volátiles, sulfatos, pH y potencial de neutralización. A partir del día 22 se aplicó un procedimiento de extracción sequencial de Zn, Cu, Cr y Fe para evaluar el riesgo de acidificación del sedimento, incluyendo entre los tratamientos la inoculación con una cepa de Acidithiobacillus ferrooxidans como catalizador de la oxidación de los sulfuros. La oxidación de sulfatos aumentó de 56 a 2300 mg S kg-¹ con una evolución temporal que ajustó a un modelo logístico. Hubo un aumento de 2100 a 3000 mg SO4 -² L-¹ de sulfatos en el experimento de resuspensión. La oxidación de los sulfuros osciló entre 0 y 3,1.10-9 mg O2 kg-¹ s-¹. Los cambios en el comportamiento del Zn pueden ser explicados parcialmente por la conversión de ZnS a ZnSO4 durante el proceso de oxidación. La reducción del hierro podría ser atribuida a un aumento en la cristalinidad de los óxidos de Fe. El balance ácido-base señala que la muestra es un material con capacidad generadora de acidez. El Zn aumentó su biodisponibilidad durante el proceso de secado y es el único metal que se encuentra presente en cantidad significativa durante el proceso de resuspensión. La disposición en tierra firme de sedimentos dragados puede generar aumento de biodisponibilidad de metales más allá de su impacto en el potencial efectivo de neutralización.

  10. Control of nuclear materials and materials in Argentina

    International Nuclear Information System (INIS)

    Arbor G, A.; Fernandes M, S.

    1988-01-01

    A general view about the safeguards activities in Argentina is presented. The national system of accounting for and control of nuclear materials is described. The safeguards agreement signed by Argentina are presented. (E.G.) [pt

  11. EFECTO DE LA TEMPERATURA DE SECADO SOBRE EL GRADO Y LA VARIABILIDAD ESPACIAL DE LA REPELENCIA AL AGUA EN ANDISOLES DE ANTIOQUIA, COLOMBIA DRYING TEMPERATURE, PERSISTENCE AND SPATIAL VARIABILITY OF WATER REPELLENCY IN ANDISOLS OF ANTIOQUIA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Daniel Francisco Jaramillo Jaramillo

    2007-12-01

    Full Text Available En la cuenca hidrográfica de la quebrada Piedras Blancas, Oriente Antioqueño - Colombia, se ubicaron dos sitios con diferente cobertura vegetal: uno con una plantación de Pinus patula (pino y el otro, con cobertura natural. En cada sitio se demarcaron dos transectos con diferente dirección: uno N-S y el otro E-O. Sobre cada transecto se hizo un muestreo intensivo del suelo, a cuatro profundidades y en dos épocas diferentes: una seca y otra húmeda, para evaluar la persistencia de la repelencia al agua real y la respuesta de la repelencia al agua al secado de las muestras a diferentes temperaturas en ambas coberturas, épocas y direcciones. La evaluación de la persistencia se hizo con el método WDPT (Water Drop Penetration Time en condiciones de campo y en suelos secados a temperaturas de 15, 20, 25, 30, 35 y 105°C. Se observó que al incrementar la temperatura de secado, se incrementó la repelencia al agua y el volumen de suelo afectado por la hidrofobicidad. Esta situación, aunque se presenta en ambas coberturas, ocurre con mayor intensidad en los suelos ubicados bajo plantaciones de Pinus patula. Se encontró una anisotropía marcada en la repelencia al agua, la cual presentó una tendencia general a desarrollar mayor grado de hidrofobicidad en los transectos ubicados en dirección E-O. En todos los transectos estudiados se detectó una amplia variabilidad espacial, de rango corto, en la repelencia al agua, así como una distribución en parches del fenómeno y la generación de vías de flujo preferencial para la entrada y circulación de agua en el suelo.In Piedras Blancas watershed, Oriente Antioqueño - Colombia , two sites with different vegetative cover were located: one with a plantation of Pinus patula (pine and the other one with natural covering. In each site two transects with different direction were defined: one N-S and the other one E-O. On each transect an intensive sampling of soil was made to four depths and in two

  12. Incremento de disolución de un derivado del furano mediante la técnica de secado por atomización Improvement of Furane derivate dissolution rate using spray drying technique

    Directory of Open Access Journals (Sweden)

    Antonio Iraizoz Barrios

    2012-06-01

    Full Text Available Objetivo: incrementar la solubilidad en agua del 2-bromo-5-(2-bromo-2-nitrovinyl-furano (G1, un ingrediente farmacéuticamente activo sintetizado por el Centro de Bioactivos Químicos de la Universidad Central de Las Villas, con potente acción bactericida y fungicida, mediante la elaboración de macropartículas de dispersiones sólidas utilizando un proceso de secado por atomización. Métodos: se realizó un ensayo preliminar de secado por atomización de la suspensión de G1, compuesta por: 10 g de G1, 1 g de Aerosil (Aerosil®, Degusa, Bélgica, 1 g de laurilsulfato de sodio y 100 mL de agua. La atomización se efectuó en un equipo de laboratorio (Buchi Mini Dryer spray a 90 ºC. La dispersión sólida obtenida fue caracterizada físico-químicamente mediante difracción de rayos X, granulometría láser por el método de difracción angular, calorimetría diferencial de barrido, microscopia electrónica de barrido y espectrofotometría de absorción infraroja. Resultados: las partículas obtenidas presentaron un pequeño tamaño, forma esférica y un incremento de la cristalinidad del G-1; no se encontraron interacciones entre los componentes de la dispersión ni presencia de productos de degradación, y la solubilidad del G-1 en agua resultó notablemente incrementada. Conclusiones: el producto obtenido por la técnica de secado por atomización incrementó apreciablemente la solubilidad del G1 sin afectar los grupos funcionales, responsables de la actividad terapéutica que se le reportan al ingrediente activo estudiado. Estos alentadores resultados sugieren la necesidad de continuar estudios para la optimización del proceso y realizar al producto obtenido ensayos de estabilidad con el objetivo de su futura inclusión en formas farmacéuticas de dosificación.Objective: to increase the solubility of 2-bromium-5(2-bromium-2-nitrovinyl-furane (G1, one pharmaceutically active ingredient with potent bactericidal and fungicidal action

  13. EVALUACIÓN DEL SECADO DE PEREJIL APLICANDO TÉCNICAS DE DESHIDRATACIÓN OSMÓTICA COMO PRETRATAMIENTO EVALUATION OF PARSLEY DRYING APPLYING OSMOTIC DEHYDRATION TECHNIQUES AS PRETREATMENT

    Directory of Open Access Journals (Sweden)

    Maribel García Mahecha

    2010-12-01

    Full Text Available En este estudio se evaluó el efecto de la temperatura de secado (50 y 60 °C y los diferentes tipos de pretratamientos (sin pretratamiento, deshidratación osmótica y deshidratación osmótica al vacío sobre las características fisicoquímicas y nutricionales del perejil deshidratado, midiendo la actividad de agua, densidad, rehidratación, color, contenido de vitamina C y carotenos. Los resultados mostraron que el secado de perejil a una temperatura de 60 °C sin pretratamiento es el más adecuado, presentando un menor tiempo de proceso (68 min, una mayor reducción en la humedad (4,3% y un menor efecto en los contenidos de vitamina C (8,7 mg de vitamina C/100 g de muestra y carotenos (36,9 mg de carotenos/100 g de muestra. Los procesos de secado con osmodeshidratación como pretratamiento son más lentos, debido a la formación de una capa de jarabe en la superficie de las muestras, la cual dificulta la salida de la humedad del interior de las hojas. El contenido de vitamina C disminuye en todos los procesos, pero es mayor en aquellos con pretratamiento por la solubilidad de la vitamina en el agua. Los carotenos se reducen en una mayor proporción en los procesos que toman mayor tiempo en llegar a la humedad de equilibrio debido a su termosensibilidad.The influence of the drying temperature (50 and 60 °C and the different pretreatments (without pretreatment, osmotic dehydration and vacuum osmotic dehydration were evaluated on the physical, chemical and nutritional characteristics of dried parsley, such as water activity, density, rehydration, color, vitamin C content, and carotene content. The results showed that drying at 60 °C without pretreatment is the best process for drying parsley because the process time (68 min and the moisture content (4,3% are lower and the vitamin C (8,7 mg vitamin C/100 g sample and carotene contents (36,9 mg carotene/100 g sample are less affected. The drying processes with osmodehydration as pretreatment

  14. Solar Features - Solar Flares

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A solar flare is a short-lived sudden increase in the intensity of radiation emitted in the neighborhood of sunspots. For many years it was best monitored in the...

  15. Solar storms; Tormentas solares

    Energy Technology Data Exchange (ETDEWEB)

    Collaboration: Pereira Cuesta, S.; Pereira Pagan, B.

    2016-08-01

    Solar storms begin with an explosion, or solar flare, on the surface of the sun. The X-rays and extreme ultraviolet radiation from the flare reach the Earths orbit minutes later-travelling at light speed. The ionization of upper layers of our atmosphere could cause radio blackouts and satellite navigation errors (GPS). Soon after, a wave of energetic particles, electrons and protons accelerated by the explosion crosses the orbit of the Earth, and can cause real and significant damage. (Author)

  16. Psychiatry and humanism in Argentina.

    Science.gov (United States)

    Niño Amieva, Alejandra

    2016-04-01

    The authors of the present selection of Latin American Psychiatry texts were characterized by a common deep humanistic attitude. These prolific writers were able to establish or extend the scope of the discipline in which they chose to act, questioning the establishment of rigid boundaries within the framework of a rigorous epistemological reflection. Thus the systematizing spirit of Jose Ingenieros' in the context of positivist evolutionism, resulted in the act of founding a discipline that integrated the biological and the social. In the case of Guillermo Vidal his conception of mental health went beyond the biomedical to consider psychotherapies as an emotional commitment, continence and empathic understanding; with regard to César Cabral his formation and extensive clinical practice resulted in a work defined by the inquiring into the theoretical concepts underlying Psychiatry and Clinical Psychology. This brief selection does not exhaust the issues or the level of ideas and discussions of Psychiatry in Argentina, but constitutes a textual corpus representative of a disciplinary conception understood as scientific and humanistic endeavor.

  17. Argentina chiama Italia: Friuli risponde

    Directory of Open Access Journals (Sweden)

    Silvana Serafin

    2010-03-01

    Full Text Available The study analyzes the migratory waves from Friuli which, from the 1870s up to the post-World War II years, extensively moved towards Argentina, settling in the areas around the cities of Santa Fe, Cordoba, Entre Ríos, Chaco and Buenos Aires, but reaching also regions as far away as Patagonia. The accurate and well diffused net of the Fogolār Furlan, besides its function as friendly society, also provides to the promulgation of ancient traditions and mores among the new generations, transmitting on to them the cultural, linguistic and ethnic memory of the motherland. Epistles, tales, novels and poems form a paideia which is thus constantly being enlivened, eveng among those who assumed Argentinian nationality or were born in the country. Of utmost interest is, therefore, the resulting literary corpus, representing as it does a renewed search for identity in the form of a dialogue with the world, extending itself well beyond the contingency of boundaries and transmitting the universal essence of logos.

  18. The nuclear research centre at Bariloche, Argentina

    International Nuclear Information System (INIS)

    Abriata, J.P.

    2001-01-01

    The nuclear research centre at Bariloche (CAB) is one of the four centres under the Atomic Energy Commission of Argentina (CNEA). The research programme of CAB addresses various issues like nuclear reactor development, nuclear fuel and fuel cycle, applications of radioisotopes and radiation, and waste management. There is also a basic nuclear science component. The human resource development in the areas of physics and nuclear engineering is done in an associated Balseiro Institute which has undergraduate and graduate programmes as well as doctoral and postdoctoral research. The Centre interacts well with the society and provides services in the nuclear area. It has a close interaction with the nuclear sector of Argentina as also with many international organisations. Regulatory control over the Centre is carried out by the Nuclear Regulatory Authority of Argentina. (author)

  19. Long-term and transient time variation of cosmic ray fluxes detected in Argentina by CARPET cosmic ray detector

    Science.gov (United States)

    De Mendonça, R. R. S.; Raulin, J.-P.; Bertoni, F. C. P.; Echer, E.; Makhmutov, V. S.; Fernandez, G.

    2011-07-01

    We present results obtained at El Leoncito (CASLEO, San Juan, Argentina) with the CARPET charged particles detector installed in April 2006. The observed modulation of the cosmic ray flux is discussed as a function of its time variability and it is related to longer solar activity variations and to shorter variations during solar and geomagnetic transient activity. Short period (few minutes, few hours) cosmic ray modulation events are observed during rain time (precipitation) and significant variations of the atmospheric electric field. Complementary observations of the atmospheric electric field indicate that its time variations play an important role in the detected cosmic ray event.

  20. Argentina's YPF hones in on privatization

    International Nuclear Information System (INIS)

    Anon.

    1991-01-01

    This paper reports on Argentina's push to privatize and attract more foreign investment to its petroleum sector which continues to gather momentum. The Argentine government plans by year end 1992 to sell unprofitable assets of Yacimientos Petroliferos Fiscales, then sell as much as 50% of the state oil company through an international stock offering. If privatization proceeds as expected, YPF Pres. Jose Estenssoro the, the company's stock will be offered to private investors early in 1993. The company was founded in 1922. By March 1992, Argentina also will begin selling all assets of state owned Gas del Estado (GDE) through an international bidding process expected to take about 18 months

  1. Communications received from Argentina and Brazil

    International Nuclear Information System (INIS)

    1988-05-01

    The document reproduces the Joint Declaration on Nuclear Policy signed by the Presidents of Argentina and Brazil on 30 November 1985, the Protocol on Nuclear Co-operation between Argentina and Brazil signed on 10 December 1986, the Joint Declaration on Nuclear Policy signed by the two Presidents on 10 December 1986, the Joint Declaration on Nuclear Policy signed by the two Presidents on 17 July 1987 and the Joint Declaration on Nuclear Policy (IPERO Declaration) signed by the two Presidents on 8 April 1988

  2. Transferencia de Tecnologías a una Cooperativa en Argentina. Un Estudio de Caso

    Directory of Open Access Journals (Sweden)

    Maximiliano Facundo Vila Seoane

    2013-04-01

    Full Text Available This paper describes a pilot technology transfer process carried out in the province of Salta, northwestern Argentina, whose goal was to disseminate knowledge to produce solar cookers. The particularity of this experience is that the source of knowledge transfer has been made from a research and development center to a cooperative public work in the province. The paper describes in detail all the stages of the process, methods that have been used, and suggests a set of points to consider in future similar experiences.

  3. Telescopio Solar en Hα (HASTA)

    Science.gov (United States)

    Fernández Borda, R.; Francile, C.; Bagala, G.; Bauer, O.; Haerendel, G.; Rieger, E.; Rovira, M.

    El Telescopio Solar en Hα (Hα Solar Telescope for Argentina (-HASTA-) fue recientemente instalado en la Estación Astronómica de Altura Carlos Ulrrico Cesco (OAFA) en El Leoncito. Este instrumento estudiará la evolución de las fulguraciones solares desde tierra con alta resolución temporal y espacial. HASTA es un telescopio refractor de 110 mm con una distancia focal de 165 cm, un filtro Lyot sintonizable (±1Å) con un ancho de banda de 0.3 Å y una cámara CCD de alta resolución (1280×1024 pixels). Todo el conjunto es controlado en forma remota por una PC, la cual además adquiere datos del Sistema de Posicionamiento Global (GPS) y de la estación meteorológica. Diseñado para detectar fulguraciones, el instrumento trabaja en dos modos (patrullaje y fulguración) con una resolución espacial de 1.5 arcseg por pixel y una resolución temporal de 2 seg. HASTA comenzó a operar en Mayo de 1998 y, junto con otros tres instrumentos solares, que se están instalando o se instalaron, harán de El Leoncito un polo de observación solar importante en el Hemisferio Sur.

  4. Solar Energy.

    Science.gov (United States)

    Eaton, William W.

    Presented is the utilization of solar radiation as an energy resource principally for the production of electricity. Included are discussions of solar thermal conversion, photovoltic conversion, wind energy, and energy from ocean temperature differences. Future solar energy plans, the role of solar energy in plant and fossil fuel production, and…

  5. Operating practical experience at Argentina; Experiencia practica operativa en la Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Quihillalt, Oscar [Nucleoelectria Argentina S.A., Buenos Aires (Argentina)

    1998-12-31

    Operating experiences of Atucha-1 and Embalse Nuclear Power Plants were discussed in this work. The technical and economic aspects, such as reliability, availability, personnel training, operating costs, prices and market, which exercise influence upon Argentina nuclear energy policy, mainly on the power electric generation by nuclear power plants were considered. Finally the current status of the nucleoelectric sector in Argentina and forecasting were analysed. 3 figs., 5 tabs.

  6. Solar energy

    Science.gov (United States)

    Rapp, D.

    1981-01-01

    The book opens with a review of the patterns of energy use and resources in the United States, and an exploration of the potential of solar energy to supply some of this energy in the future. This is followed by background material on solar geometry, solar intensities, flat plate collectors, and economics. Detailed attention is then given to a variety of solar units and systems, including domestic hot water systems, space heating systems, solar-assisted heat pumps, intermediate temperature collectors, space heating/cooling systems, concentrating collectors for high temperatures, storage systems, and solar total energy systems. Finally, rights to solar access are discussed.

  7. Solar Combisystems

    DEFF Research Database (Denmark)

    Thür, Alexander

    2006-01-01

    This note first introduces what is a solar combisystem, the structure how a solar combisystem is build up and what are criteria’s to evaluate a solar combisystem concept. Further on the main components of a solar combisystem, the main characteristics and possible advantages and disadvantages...... compared to each other are described. It is not the goal of this note to explain the technical details how to design all components of a solar combisystem. This is done during other lectures of the solar course and in other basic courses as well. This note tries to explain how a solar combisystem...

  8. Solar Systems

    Science.gov (United States)

    1979-01-01

    The solar collectors shown are elements of domestic solar hot water systems produced by Solar One Ltd., Virginia Beach, Virginia. Design of these systems benefited from technical expertise provided Solar One by NASA's Langley Research Center. The company obtained a NASA technical support package describing the d e sign and operation of solar heating equipment in NASA's Tech House, a demonstration project in which aerospace and commercial building technology are combined in an energy- efficient home. Solar One received further assistance through personal contact with Langley solar experts. The company reports that the technical information provided by NASA influenced Solar One's panel design, its selection of a long-life panel coating which increases solar collection efficiency, and the method adopted for protecting solar collectors from freezing conditions.

  9. Solar radiophysics

    International Nuclear Information System (INIS)

    McLean, D.J.; Labrum, N.R.

    1985-01-01

    This book treats all aspects of solar radioastronomy at metre wavelengths, particularly work carried out on the Australian radioheliograph at Culgoora, with which most of the authors have been associated in one way or another. After an introductory section on historical aspects, the solar atmosphere, solar flares, and coronal radio emission, the book deals with instrumentation, theory, and details of observations and interpretations of the various aspects of metrewave solar radioastronomy, including burst types, solar storms, and the quiet sun. (U.K.)

  10. The Politics of Human Rights in Argentina

    OpenAIRE

    Brysk, Alison

    2013-01-01

    Revised edition of 1994 out-of-print Stanford University Press study of human rights protest, social change, and democratization in Argentina.  A symbolic politics analysis of the truth commission, trials, and policy reform in Latin America's most sweeping transition of the 1980's.

  11. Argentina - Women Weaving Equitable Gender Relations

    OpenAIRE

    Stubbs, Josefina

    2008-01-01

    In 2001, after a long period of recession, Argentina faced the greatest economic, political, and institutional crisis in its history. Unemployment reached levels nearing 18 percent and the poverty rate reached a peak of 58 percent in 2002, increasing twofold the number of people living the poverty line and impacting in a disproportionate manner the most vulnerable and poverty stricken fami...

  12. Agua potable y saneamiento en la Argentina

    OpenAIRE

    Auge, Miguel

    2007-01-01

    Este trabajo fue presentado originalmente en el Foro Regional del Agua, con el título “Problemática del Acceso al Agua Potable y al Saneamiento en Argentina”. Dicho foro, organizado por la Defensoría del Pueblo de la Nación Argentina, se desarrolló en Córdoba, en mayo del 2007.

  13. Argentina and Brazil's Relations to the EU

    DEFF Research Database (Denmark)

    Christensen, Steen Fryba

    Analysen diskuterer Argentina og Brasiliens relationer til EU i nyere tid med udgangspunkt i forhandlingerne om en associeringsaftale mellem EU og Mercosur, der igangsattes efter underskrivelsen af en bi-regional rammeaftale i 1995. Fokus er i særlig grad på, hvordan disse relationer bedst forstås...

  14. Sudden death syndrome of soybean in Argentina

    Science.gov (United States)

    Sudden death syndrome (SDS) is one of the most common and widely spread root disease affecting soybean [Glycine max (L.) Merr.] in Argentina where it is an economically important crop. This disease was first discovered in this country in 1992 in the Pampas Region, and the following year in Northwest...

  15. Payenia volcanic province, southern Mendoza, Argentina

    DEFF Research Database (Denmark)

    Søager, Nina; Holm, Paul Martin; Llambias, Eduardo Jorge

    2013-01-01

    The Pleistocene to Holocene Payenia volcanic province is a backarc region of 60,000 km2 in Mendoza, Argentina, which is dominated by transitional to alkaline basalts and trachybasalts. We present major and trace element compositions of 139 rocks from this area of which the majority are basaltic...

  16. Argentina : Gender Equity in the Private Sector

    OpenAIRE

    World Bank

    2010-01-01

    First tested in Mexico in 2003, and most recently applied in 2009 in Argentina, the World Bank has developed a model to incorporate gender equity into private sector organizations while simultaneously enhancing their business. Under the model, participating organizations conduct a self-diagnosis to identify gender biases and gaps in the operations. This baseline is then used to create and ...

  17. SRTM Anaglyph: Las Bayas, Argentina

    Science.gov (United States)

    2001-01-01

    The interplay of volcanism, stream erosion and landslides is evident in this Shuttle Radar Topography Mission view of the eastern flank of the Andes Mountains, southeast of San Carlos de Bariloche, Argentina. Older lava flows emanating from the Andes once covered much of this area. Younger, local volcanoes (seen here as small peaks) then covered parts of the area with fresh, erosion resistant flows (seen here as very smooth surfaces). Subsequent erosion has created fine patterns on the older surfaces (bottom of the image) and bolder, irregular patterns through and around the younger surfaces (upper center and right center). Meanwhile, where a large stream immediately borders the resistant plateau (center of the image), lateral erosion has undercut the resistant plateau causing slivers of it to fall into the stream channel. This scene well illustrate show topographic data alone can reveal some aspects of recent geologic history.This anaglyph was produced by first shading a preliminary elevation model from data acquired by the Shuttle Radar Topography Mission. The stereoscopic effect was then created by generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.Elevation data used in this image were acquired by the Shuttle Radar Topography Mission aboard the Space Shuttle Endeavour, launched on February 11, 2000. The mission used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar that flew twice on the Space Shuttle Endeavour in 1994. The Shuttle Radar Topography Mission was designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, installed additional C-band and X-band antennas, and improved tracking

  18. [Adult mortality differentials in Argentina].

    Science.gov (United States)

    Rofman, R

    1994-06-01

    Adult mortality differentials in Argentina are estimated and analyzed using data from the National Social Security Administration. The study of adult mortality has attracted little attention in developing countries because of the scarcity of reliable statistics and the greater importance assigned to demographic phenomena traditionally associated with development, such as infant mortality and fertility. A sample of 39,421 records of retired persons surviving as of June 30, 1988, was analyzed by age, sex, region of residence, relative amount of pension, and social security fund of membership prior to the consolidation of the system in 1967. The thirteen former funds were grouped into the five categories of government, commerce, industry, self-employed, and other, which were assumed to be proxies for the activity sector in which the individual spent his active life. The sample is not representative of the Argentine population, since it excludes the lowest and highest socioeconomic strata and overrepresents men and urban residents. It is, however, believed to be adequate for explaining mortality differentials for most of the population covered by the social security system. The study methodology was based on the technique of logistic analysis and on the use of regional model life tables developed by Coale and others. To evaluate the effect of the study variables on the probability of dying, a regression model of maximal verisimilitude was estimated. The model relates the logit of the probability of death between ages 65 and 95 to the available explanatory variables, including their possible interactions. Life tables were constructed by sex, region of residence, previous pension fund, and income. As a test of external consistency, a model including only age and sex as explanatory variables was constructed using the methodology. The results confirmed consistency between the estimated values and other published estimates. A significant conclusion of the study was that

  19. Predicting the drying shrinkage behavior of high strength portland cement mortar under the combined influence of fine aggregate and steel micro fiber; Predicción del comportamiento de retracción por secado de morteros de cemento Pórtland de alta resistencia bajo la influencia combinada de árido fino y micro fibra de acero.

    Energy Technology Data Exchange (ETDEWEB)

    Li, Zhengqi

    2017-07-01

    The workability, 28-day compressive strength and free drying shrinkage of a very high strength (121-142 MPa) steel micro fiber reinforced portland cement mortar were studied under a combined influence of fine aggregate content and fiber content. The test results showed that an increase in the fine aggregate content resulted in decreases in the workability, 28-day compressive strength and drying shrinkage of mortar at a fixed fiber content. An increase in the fiber content resulted in decreases in the workability and drying shrinkage of mortar, but an increase in the 28-day compressive strength of mortar at a fixed fine aggregate content. The modified Gardner model most accurately predicted the drying shrinkage development of the high strength mortars, followed by the Ross model and the ACI 209R-92 model. The Gardner model gave the least accurate prediction for it was developed based on a database of normal strength concrete. [Spanish] Se ha estudiado la trabajabilidad, resistencia a la compresión (28 días) y la retracción al secado de morteros de cemento Pórtland de muy alta resistencia (121-142 MPa) reforzados con micro fibra de acero, con la influencia combinada de contenido de árido fino y de micro fibra de acero. El aumento en el contenido de árido fino resultó en la disminución de la trabajabilidad, resistencia a la compresión y la retracción por secado de los morteros con un contenido de fibra específico. El aumento en el contenido de fibra dio lugar a la disminución de la trabajabilidad y la retracción por secado, y a un aumento en la resistencia a la compresión a 28 días en morteros con un contenido específico de á rido fino. El modelo modificado de Gardner predijo con más precisión la retracción por secado de mortero de alta resistencia, seguido por el modelo de Ross y el modelo ACI 209R-92. El modelo de Gardner dio la predicción menos exacta debido al hecho de que se desarrolló sobre bases de datos de hormigones de resistencia normal.

  20. Descripción del coronógrafo a ser instalado en Argentina (MICA)

    Science.gov (United States)

    Stenborg, G.; Francile, C.; Schwenn, R.; Epple, A.; Rovira, M.

    El ``Coronógrafo de espejo para Argentina'' es un telescopio solar terrestre a ser colocado en el Observatorio Astronómico Félix Aguilar (El Leoncito), antes de finalizar 1996, como parte de un programa de ciencia bilateral entre Alemania y Argentina. Eclipses fotográficos de alta resolución han revelado que la corona solar es altamente estructurada y variable. De hecho, está contínuamente deformada y moldeada por los movimientos convectivos de los extremos de los arcos magnéticos en la fotosfera, estando, en muchas oportunidades, afectada por explosivas liberaciones de energía. MICA, en conjunción con otros telescopios solares espaciales y terrestres, tratará de contribuir al entendimiento de cuestiones fundamentales de la física solar. Entre ellas: cómo la corona está siendo calentada, dónde y cómo el viento solar es acelerado, qué causa los transitorios coronales, etc. Para ello investigará la distribución de los parámetros del plasma y su evolución con el tiempo, la estructura espacial de la corona en fina y gran escala, procesos que ocurren en los transitorios coronales y factores que los disparan, etc. Para responder a estas cuestiones MICA observará la atmósfera solar por sobre el limbo entre 1.1 y 2 radios solares aproximadamente, usando un nuevo tipo de sistema coronográfico que permite suprimir el brillo del disco solar suficientemente bien, tomando las imágenes con una cámara CCD de 1024x1024 pixels, codificada en 12 bits, pudiendo el mismo ser operado en forma remota. En la presente exposición describiremos las características del instrumento, cómo será controlado y qué esperamos observar basados en las imágenes obtenidas por los telescopios de similares características LASCO C1 a bordo del SOHO y PICO (ubicado en el Observatorio de Pic du Midi, Francia).

  1. Solar energy

    International Nuclear Information System (INIS)

    Kruisheer, N.

    1992-01-01

    In five brief articles product information is given on solar energy applications with special attention to the Netherlands. After an introduction on solar energy availability in the Netherlands the developments in solar boiler techniques are dealt with. Solar water heaters have advantages for the environment, and government subsidies stimulate different uses of such water heaters. Also the developments of solar cells show good prospects, not only for developing countries, but also for the industrialized countries. In brief the developments in solar energy storage and the connection of solar equipment to the grid are discussed. Finally attention is paid to the applications of passive solar energy in the housing construction, the use of transparent thermal insulation and the developments of translucent materials. 18 figs., 18 ills

  2. Solar Imagery

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of solar photographic and illustrated datasets contributed by a number of national and private solar observatories located worldwide....

  3. Solar Features

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of solar feature datasets contributed by a number of national and private solar observatories located worldwide.

  4. Solar Indices

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  5. Photovoltaic generating systems in rural schools in Neuquen Province, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Lawand, T.A.; Campbell, J. [Brace Research Institute, Quebec (Canada)

    1997-12-01

    During the period 1994-95, solar photovoltaic systems were installed at a number of schools in Neuquen Province, Argentina, by the Provincial electric utility, Ente Provincial de Energia del Neuquen. This was undertaken with funds provided by the Inter-American Development Bank. In all, there are 12 schools that have had photovoltaic generating systems installed. These generating systems are designed to provide electricity for the basic needs at the schools: primarily for lighting, and to operate small electrical appliances such as communication radios, televisions, VCR`s, AM/FM and short-wave radios. They do not provide enough energy to operate large consumption appliances such as washing machines, microwaves, refrigerators, power tools, etc. The program of provision of PV systems was supplemented with training on simple systems for cooking food or drying fruit, etc. These techniques are primarily intended for demonstration at the schools thus serving an educational role with the hope that they will be transmitted in time to the families of the students where the need is manifested the most.

  6. Biodiversity information system of the national parks administration of Argentina

    Directory of Open Access Journals (Sweden)

    Leonidas Lizarraga

    2014-06-01

    Full Text Available Introduction The Biodiversity Information System (BIS of the National Parks Administration of Argentina (NPA was launched in 2002, with the support of the Global Environmental Fund (GEF through the Biodiversity Conservation Project in Argentina. The BIS consists of a set of thematic databases and Geographic Information System (GIS set to support management decisions, and to provide information to the general public on the national protected areas of Argentina. Currently, the BIS-NPA progr...

  7. Solar Special

    International Nuclear Information System (INIS)

    Van Roekel, A.; Osborne, J.; Schroeter, S.; De Jong, R.; De Saint Jacob, Y.

    2009-01-01

    Solar power is growing much faster than most policymakers and analysts realise. As costs come down and feed-in tariffs go up across Europe, a number of countries have started in pursuit of market leader Germany. But in Germany criticism is growing of the multi-billion-euro support schemes that keep the solar industry booming. In this section of the magazine several articles are dedicated to developments in solar energy in Europe. The first article is an overview story on the strong growing global market for solar cells, mainly thanks to subsidy schemes. The second article is on the position of foreign companies in the solar market in Italy. Article number three is dedicated to the conditions for solar technology companies to establish themselves in the German state of Saxony. Also the fifth article deals with the development of solar cells in Saxony: scientists, plant manufacturers and module producers in Saxony are working on new technologies that can be used to produce solar electricity cost-effectively. The goal is to bring the price down to match that of conventionally generated electricity within the next few years. The sixth article deals with the the solar power market in Belgium, which may be overheated or 'oversubsidized'. Article seven is on France, which used to be a pioneer in solar technology, but now produces only a fraction of the solar output of market leader Germany. However, new attractive feed-in-tariffs are changing the solar landscape drastically

  8. Argentina : tous les projets | Page 4 | CRDI - Centre de recherches ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Région: Argentina, South America, Brazil, Chile, Mexico, North and Central America ... Sujet: WOMEN'S PARTICIPATION, POLITICS, POLITICAL LEADERSHIP, WOMEN'S RIGHTS, GENDER ... Sujet: BIOLOGY, BIODIVERSITY, ECOLOGY.

  9. Argentina : tous les projets | Page 7 | CRDI - Centre de recherches ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Sujet: INTERNATIONAL AGREEMENTS, WOMEN'S RIGHTS, LEGISLATION, ACCESS TO ... SERVICES, GENDER DISCRIMINATION, GENDER EQUALITY, Gender ... Région: Argentina, Bangladesh, Brazil, India, Lebanon, Malawi, Viet Nam.

  10. Argentina : tous les projets | Page 8 | CRDI - Centre de recherches ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    ... INNOVATIONS, INFORMATION TECHNOLOGY, Internet, TEACHING AIDS, ... Région: Argentina, South America, Brazil, Chile, Colombia, Mexico, North and ... Sujet: SOCIAL PARTICIPATION, Civil society, HEALTH SYSTEM, Evaluation.

  11. LAS ESPECIES ARGENTINAS DEL GENERO SICYOS (CUCURBITACEAE.

    Directory of Open Access Journals (Sweden)

    Raúl Martínez Crovetto

    1964-01-01

    Full Text Available El autor estudia las especies del género Sicyos que viven dentro del territorio de la República Argentina; señalando que hasta el presente se han hallado seis. Luego de una diagnosis del género, suministra una clave, descripciones y figuras de cada una de ellas, a fin de facilitar su reconocimiento. Las especies estudiadas son S. malvifolius Griseb., S. polyacanthus Cogn., S. Odanellii Mart.-Crov., S. Kunthii Cogn. (nuevo habitante para la flora argentina, S. Warmingii Cogn, S. Warmingii Cogn. var. longispina Mart.-Crov. (nueva variedad y S. ignarus Mart.-Crov. (especie nueva para la ciencia.

  12. La migracion internacional en Argentina hacia 2010

    Directory of Open Access Journals (Sweden)

    Laura Calvelo

    Full Text Available El artículo presenta los principales lineamientos de la migración internacional en Argentina hacia el año 2010, con detenimiento en el período 2000-2010. En el caso de la inmigración no nativa se basa en información de los censos nacionales de población 2001 y 2010. En el caso de la migración internacional de la población nativa de Argentina el análisis se sustenta en información de censos extranjeros hasta la ronda 2000 y en otras fuentes de datos de los principales países de destino hasta 2010 (Estados Unidos y España.

  13. Measurements of atmospheric fallout in Argentina

    International Nuclear Information System (INIS)

    Canoba, A.C.; Lopez, F.O.; Bruno, H.A.

    1998-01-01

    With the purpose of studying the radioactive fallout present in Argentina from atmospheric nuclear explosions tests that have been conducted recently, an environmental monitoring program, outside the influence of nuclear facilities of Argentina, was undertaken during 1996 and 1997. The levels of Cs-137 and Sr-90 were analysed in samples of air, deposited material (rainwater), milk, an average meal of a standard man and food. During this period, a total of 630 radiochemical analysis were performed on 325 samples of the different matrices described. The concentration levels of the radionuclides analysed in the different environmental matrices are presented and are compared with the values obtained in the environmental monitoring program done during the period 1960-1981. (author) [es

  14. Spent fuel management of NPPs in Argentina

    International Nuclear Information System (INIS)

    Alvarez, D.E.; Lee Gonzalez, H.M.

    2010-01-01

    There are two Nuclear Power Plants in operation in Argentina: 'Atucha I' (unique PHWR design) in operation since 1974, and 'Embalse' (typical Candu reactor) which started operation in 1984. Both NPPs are operated by 'Nucleoelectrica Argentina S.A' which is responsible for the management and interim storage of spent fuel till the end of the operative life of the plants. A third NPP, 'Atucha II' is under construction, with a similar design of Atucha I. The legislative framework establishes that after final shutdown of a NPP the spent fuel will be transferred to the 'National Atomic Energy Commission', which is also responsible for the decommissioning of the Plants. In Atucha I, the spent fuel is stored underwater, until another option is implemented meanwhile in Embalse the spent fuel is stored during six years in pools and then it is moved to a dry storage. A decision about the fuel cycle back-end strategy will be taken before year 2030. (authors)

  15. Cultural Diversity: "Reports from Brazil and Argentina"

    Directory of Open Access Journals (Sweden)

    Célia Regina Rossi

    2007-06-01

    Full Text Available This article tells two experiences of projects carried through in schools of basic education whose thematic it was the work with the cultural diversity, the valuation of other cultures and reflections on the proper culture The work was carried through in two schools: one in the state of São Paulo, the city of Rio Claro where as the thematic one worked was the Hip-Hop and cultural manifestations local Brazilians the second in the capital of a Argentina province, in the city of Paraná where it worked the contact and the relation enter the cultural manifestations of Brazil and Argentina The central objective of this work was to think ways that could lead to the construction of a school that it considered the differences and the learning that happens when these (the differences they are in relation.

  16. Argentina and Brazil: an evolving nuclear relationship

    International Nuclear Information System (INIS)

    Redick, J.R.

    1990-01-01

    Argentina and Brazil have Latin America's most advanced nuclear research and power programs. Both nations reject the Non-Proliferation Treaty (NPT), and have not formally embraced the Tlatelolco Treaty creating a regional nuclear-weapon-free zone. Disturbing ambiguities persist regarding certain indigenous nuclear facilities and growing nuclear submarine and missile capabilities. For these, and other reasons, the two nations are widely considered potential nuclear weapon states. However both nations have been active supporters of the International Atomic Energy Agency (IAEA) and have, in recent years, assumed a generally responsible position in regard to their own nuclear export activities (requiring IAEA safeguards). Most important, however, has been the advent of bilateral nuclear cooperation. This paper considers the evolving nuclear relationship in the context of recent and dramatic political change in Argentina and Brazil. It discusses current political and nuclear developments and the prospects for maintaining and expanding present bilateral cooperation into an effective non-proliferation arrangement. (author)

  17. Rocky Mountain spotted fever in Argentina.

    Science.gov (United States)

    Paddock, Christopher D; Fernandez, Susana; Echenique, Gustavo A; Sumner, John W; Reeves, Will K; Zaki, Sherif R; Remondegui, Carlos E

    2008-04-01

    We describe the first molecular confirmation of Rickettsia rickettsii, the cause of Rocky Mountain spotted fever (RMSF), from a tick vector, Amblyomma cajennense, and from a cluster of fatal spotted fever cases in Argentina. Questing A. cajennense ticks were collected at or near sites of presumed or confirmed cases of spotted fever rickettsiosis in Jujuy Province and evaluated by polymerase chain reaction assays for spotted fever group rickettsiae. DNA of R. rickettsii was amplified from a pool of A. cajennense ticks and from tissues of one of four patients who died during 2003-2004 after illnesses characterized by high fever, severe headache, myalgias, and petechial rash. The diagnosis of spotted fever rickettsiosis was confirmed in the other patients by indirect immunofluorescence antibody and immunohistochemical staining techniques. These findings show the existence of RMSF in Argentina and emphasize the need for clinicians throughout the Americas to consider RMSF in patients with febrile rash illnesses.

  18. Investment in Renewable Energies in Argentina

    OpenAIRE

    Marina Recalde

    2017-01-01

    This article analyzes how the enabling conditions of the energy policy of a developing country such as Argentina, are crucial for the deployment of renewable energy investments. The conclusions highlights that the low institutional quality of the country shapes enabling conditions and reduce effect of the instruments of the energy policy, dropping incentives for investment in renewable technologies in the country. Therefore, in order to promote renewable technologies investments efficiently, ...

  19. Investment in Renewable Energies in Argentina

    Directory of Open Access Journals (Sweden)

    Marina Recalde

    2017-05-01

    Full Text Available This article analyzes how the enabling conditions of the energy policy of a developing country such as Argentina, are crucial for the deployment of renewable energy investments. The conclusions highlights that the low institutional quality of the country shapes enabling conditions and reduce effect of the instruments of the energy policy, dropping incentives for investment in renewable technologies in the country. Therefore, in order to promote renewable technologies investments efficiently, the institutional framework of countries must be seriously improved.

  20. Area Handbook Series: Argentina: A Country Study

    Science.gov (United States)

    1985-08-01

    votes after a campaign that emphasized firm opposition to the military government and verbal attacks on the trade union leadership of the PJ...legal pro- cedures that were designed especially for these cases. The trials were open to the public, evidence would be taken verbal - ly instead of...1981,144-45. Terrera, Guillermo Alfredo. Geopolitica Argentina: Poblacion, fronteras, comunicaciones , antropologia. Buenos Aires: Edi- torial Plus

  1. Memories of the armed struggle in Argentina

    Directory of Open Access Journals (Sweden)

    Laura Margarita Pasquali

    2013-06-01

    Full Text Available This article presents and develops some of the edges on working of the guerrilla that emerge in the memories of the former militants of the armed organizations in Argentina. Beginig from this journey we will have access to the registration that one has presently on it, which will allows us to establish part of the subjective environment of the moment, the main characters consideration of the activism and their significance in the general context of the militancy.

  2. Burden of Serious Fungal Infections in Argentina

    Directory of Open Access Journals (Sweden)

    Fernando O. Riera

    2018-04-01

    Full Text Available The number of fungal infections at any given time in Argentina is not known. Here we estimate the burden of serious fungal infections in Argentina for the first time. Specific population statistics were searched from multiple sources, local literature was identified, and estimates made. Some additional data were sourced from the Ministry of Health, the Global Initiative for Asthma (GINA program, and national haematology and transplant societies. Argentina has a population of 43.8 million, with 25% of this total being children under 15 years. The predicted candidemia annual incidence is 2193 cases, with 50% occurring in the ICU. At a 6% prevalence rate, an estimated 593,695 women suffer from recurrent vulvovaginal candidiasis. Invasive aspergillosis is relatively common because of high smoking and chronic obstructive pulmonary disease (COPD rates, with 268 cases in immunocompromised patients and another 1938 in the 168,000 COPD patients admitted to hospital. Asthma is also common, affecting 14% of adults, and so allergic bronchopulmonary aspergillosis (ABPA and severe asthma with fungal sensitization (SAFS are major problems. An estimated 432 cases of cryptococcal meningitis (CM—90% of them in AIDS patients—and 1177 cases of Pneumocystis pneumonia (PCP occur each year. The estimated annual case number of disseminated histoplasmosis is 404 in AIDS patients, almost as frequent as CM. Paracoccidioidomycosis annual incidence is estimated at 219, and coccidioidomycosis at 16 cases. At least 881,023 people (>2.01% in Argentina are affected by a serious fungal disease annually, with considerable morbidity and mortality.

  3. The "Private School Advantage" in Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo E. Fischman

    2001-08-01

    Full Text Available Local actors' perceptions of curricular and management changes in two private schools and one neighboring public secondary school in the city of Buenos Aires, Argentina, are analyzed. An exploration was conducted of how, within an ideologically and politically pro-reform context and a widespread acceptance of the "private school advantage," principals, teachers, and students in these schools evaluated the changes (or lack of them in management, teaching, and curriculum orientations of the secondary education sector.

  4. Where is Argentina going in geothermal energy

    Energy Technology Data Exchange (ETDEWEB)

    Mange, J

    1977-01-01

    A brief review is given of geothermal exploration and development in Argentina. Methodical efforts to inventory the geothermal resources of the country were begun in 1974. The Commission set itself the task of locating the geothermal anomalies and then selecting particular anomalies for intensive exploration in order to confirm or discard the possibilities of exploiting the resource. The known principal anomalies are listed and the two selected for intensive exploration are indicated. (JSR)

  5. The Andean Swallow (Orochelidon andecola) in Argentina

    OpenAIRE

    Mazar Barnett, Juan; Pugnali, Germán D.; Pearman Morrison, Mark; Bodrati, Alejandro; Moschione, Flavio; Clark, Ricardo; Roesler, Carlos Ignacio; Monteleone, Diego; Casañas, Hernán; Burgos Gallardo, Freddy; Segovia, José; Pagano, Luis; Povedano, Hernán; Areta, Juan Ignacio

    2016-01-01

    During ornithological studies in the provinces of Jujuy, Salta, and San Juan, we recorded the Andean Swallow Orochelidon andecola at 40 localities. These are the first records in Argentina, and also represent the southernmost for the species. Some of these localities are up to 1500 m lower than the previously known elevational limit (now 800 masl), and up to 1100 km southwards. This is a relatively poorly known swallow, and we present novel natural history data. We found evidence of breeding ...

  6. The "Private School Advantage" in Argentina

    OpenAIRE

    Gustavo E. Fischman

    2001-01-01

    Local actors' perceptions of curricular and management changes in two private schools and one neighboring public secondary school in the city of Buenos Aires, Argentina, are analyzed. An exploration was conducted of how, within an ideologically and politically pro-reform context and a widespread acceptance of the "private school advantage," principals, teachers, and students in these schools evaluated the changes (or lack of them) in management, teaching, and curriculum orientations of the se...

  7. About the Triple A. Argentina 1973 - 1976

    OpenAIRE

    Rostica, Julieta

    2011-01-01

    On May 25, 1973, Peronism returned to govern Argentina after about two decades of prohibition and political persecution. After its establishment, certain crimes began to be signed with “AAA”. The Triple A adopted the particularity of disappearing with the coup on March 24 1976. Why could this organization only exist in a democracy erected in the middle of two military dictatorships? Why did it exist during the very wished Peronist government? The article offers an approach to the Triple A, th...

  8. Solar Indices - Solar Radio Flux

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Collection includes a variety of indices related to solar activity contributed by a number of national and private solar observatories located worldwide. This...

  9. Acute intermittent porphyria in Argentina: an update.

    Science.gov (United States)

    Cerbino, Gabriela Nora; Gerez, Esther Noemí; Varela, Laura Sabina; Melito, Viviana Alicia; Parera, Victoria Estela; Batlle, Alcira; Rossetti, María Victoria

    2015-01-01

    Porphyrias are a group of metabolic diseases that arise from deficiencies in the heme biosynthetic pathway. A partial deficiency in hydroxymethylbilane synthase (HMBS) produces a hepatic disorder named Acute Intermittent Porphyria (AIP); the acute porphyria is more frequent in Argentina. In this paper we review the results obtained for 101 Argentinean AIP families and 6 AIP families from foreign neighbour countries studied at molecular level at Centro de Investigaciones sobre Porfirinas y Porfirias (CIPYP). Thirty-five different mutations were found, of which 14 were described for the first time in our population. The most prevalent type of mutations was the missense mutations (43%) followed by splice defects (26%) and small deletions (20%). An odd case of a double heterozygous presentation of AIP in a foreign family from Paraguay is discussed. Moreover, it can be noted that 38 new families were found carrying the most frequent mutation in Argentina (p.G111R), increasing to 55.66% the prevalence of this genetic change in our population and adding further support to our previous hypothesis of a founder effect for this mutation in Argentina. Identification of patients with an overt AIP is important because treatment depends on an accurate diagnosis, but more critical is the identification of asymptomatic relatives to avoid acute attacks which may progress to death.

  10. La letteratura italiana tradotta in Argentina

    Directory of Open Access Journals (Sweden)

    Silvia Cattoni

    2017-11-01

    Full Text Available In due secoli di storia della letteratura argentina, lo sviluppo della letteratura italiana tradotta è in stretto rapporto con i propositi pedagogici o estetici determinati dal contesto culturale dei diversi momenti storici. In linea di massima, è possibile affermare che, dalla conformazione dello Stato nazionale e durante i primi decenni del XX secolo, la traduzione letteraria mirava ad ampliare l’orizzonte culturale di un lettore che si consolidava al ritmo della fiammante nazione. Nelle fasi successive e in stretto rapporto con la politica culturale portata avanti da Victoria Ocampo a partire dal 1931 tramite la rivista Sur e il suo posteriore progetto editoriale, la traduzione è stata soprattutto una pratica di scrittura che ebbe un’influenza decisiva nell’ordito della letteratura nazionale favorendo il suo rinnovo e incentivando le versioni di traduttori argentini. Fu questa un’apertura che favorì, durante la seconda metà del secolo, nel contesto della ricezione della letteratura universale, l’ingresso della letteratura italiana in Argentina. Il presente lavoro tratta in maniera sistematica, ma provvisoria, il panorama della letteratura italiana tradotta in Argentina. Lo scopo principale comporta il registro dei momenti più fecondi e l’interpretazione degli esiti ottenuti nei confronti della traduzione nel sistema letterario nazionale.

  11. Coupled solar still, solar heater

    Energy Technology Data Exchange (ETDEWEB)

    Davison, R R; Harris, W B; Moor, D H; Delyannis, A; Delyannis, E [eds.

    1976-01-01

    Computer simulation of combinations of solar stills and solar heaters indicates the probable economic advantage of such an arrangement in many locations if the size of the heater is optimized relative to that of the still. Experience with various low cost solar heaters is discussed.

  12. Solar Sailing

    Science.gov (United States)

    Johnson, Les

    2009-01-01

    Solar sailing is a topic of growing technical and popular interest. Solar sail propulsion will make space exploration more affordable and offer access to destinations within (and beyond) the solar system that are currently beyond our technical reach. The lecture will describe solar sails, how they work, and what they will be used for in the exploration of space. It will include a discussion of current plans for solar sails and how advanced technology, such as nanotechnology, might enhance their performance. Much has been accomplished recently to make solar sail technology very close to becoming an engineering reality and it will soon be used by the world s space agencies in the exploration of the solar system and beyond. The first part of the lecture will summarize state-of-the-art space propulsion systems and technologies. Though these other technologies are the key to any deep space exploration by humans, robots, or both, solar-sail propulsion will make space exploration more affordable and offer access to distant and difficult destinations. The second part of the lecture will describe the fundamentals of space solar sail propulsion and will describe the near-, mid- and far-term missions that might use solar sails as a propulsion system. The third part of the lecture will describe solar sail technology and the construction of current and future sailcraft, including the work of both government and private space organizations.

  13. Floods, Droughts and Farming on the Plains of Argentina and ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2015-04-01

    Floods, Droughts and Farming on the Plains of Argentina and Paraguay, Pampas and Chaco Regions ... End Date. April 1, 2015 ... Argentina, South America, Paraguay, North and Central America ... IDRC is now accepting applications for this year's IDRC Doctoral Research Awards (IDRA). ... Careers · Contact Us · Site map.

  14. Argentina v globalizačních procesech

    OpenAIRE

    Chervets, Tamara

    2009-01-01

    The process of globalization is a very important issue these days. This work will describe the process of globalization in Argentina, especially its economic aspect (foreign direct investments, export and import of goods and services, migration of labor force). I will also mention the history of its development and Argentina's membership in most important international and regional organizations.

  15. Computing and Education in Argentina, Uruguay and Paraguay.

    Science.gov (United States)

    Sadowsky, Manuel

    Although the report is specifically about Argentina, Uruguay and Paraguay, the considerations presented are valid for all of Latin America. In September, 1969, Argentina had approximately 200 electronic computers. The annual growth is estimated at 15-20% and the implementation of teleprocessing and time-sharing systems have made evident the…

  16. All projects related to Argentina | Page 7 | IDRC - International ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Region: Americas, Argentina, South America. Program: Climate Change. Total Funding: CA$ 995,000.00. Youth Smoking in Stressed Environments : Determinants and Resiliency (Argentina, Colombia, Palestine). Project. Numerous studies have shown that the earlier an individual starts smoking, the harder it is to give it up.

  17. Unemployment Assistance and Transition to Employment in Argentina

    NARCIS (Netherlands)

    A. Iturriza (Ana); A.S. Bedi (Arjun Singh); R.A. Sparrow (Robert)

    2007-01-01

    textabstractIn 2001-02, Argentina experienced a wrenching economic crisis. Plan Jefes, implemented in May 2002, was Argentina's institutional response to the increases in unemployment and poverty triggered by the crisis. The program provided a social safety net and appears to have successfully

  18. Argentina: Social Sectors in Crisis. A World Bank Country Study.

    Science.gov (United States)

    World Bank, Washington, DC.

    Based on the findings of a two month visit to Argentina by a World Bank Mission in November/December of 1988, this report summarizes current economic, education, and social policies in Argentina. The four major areas targeted are the social sectors, education, health care, and housing. The analysis identifies critical problems in the organization…

  19. Prospect for Development of Open Access in Argentina

    Science.gov (United States)

    Miguel, Sandra; Bongiovani, Paola C.; Gomez, Nancy D.; Bueno-de-la-Fuente, Gema

    2013-01-01

    This perspective article presents an overview of the Open Access movement in Argentina, from a global and regional (Latin American) context. The article describes the evolution and current state of initiatives by examining two principal approaches to Open Access in Argentina: "golden" and "green roads". The article will then…

  20. Diccionario del español de Argentina

    OpenAIRE

    Haensch, Günther

    2000-01-01

    Diccionario del español de Argentina : español de Argentina - español de España / Günther Haensch ; Reinhold Werner. Madrid : Gredos, 2000. - LI, 729 S. - (Diccionarios contrastivos del español de América)

  1. Pro-Market Educational Governance: Is Argentina a Black Swan?

    Science.gov (United States)

    Beech, Jason; Barrenechea, Ignacio

    2011-01-01

    In this article we explore ways in which pro-market discourses have been interpreted in policy initiatives in Argentina since the 1970s. Our argument is that even though pro-market discourses have guided reforms in many aspects of public policies in Argentina, the arena of education has overall been resistant to taking them up. The first part of…

  2. 1 Estudio Sectorial Sector lácteo de Argentina

    International Development Research Centre (IDRC) Digital Library (Canada)

    Resumen: La producción de leche y productos lácteos conforma en Argentina un importante complejo productivo, de larga trayectoria histórica y gran impacto económico y social. En Argentina, esta industria conforma un oligopolio diferenciado en el que coexisten unas pocas grandes empresas nacionales y ...

  3. 78 FR 46610 - Lemon Juice From Argentina and Mexico

    Science.gov (United States)

    2013-08-01

    ... Argentina and Mexico Determination On the basis of the record \\1\\ developed in the subject five-year reviews... determines that termination of the suspended antidumping duty investigation on lemon juice from Mexico would...), entitled Lemon Juice from Argentina and Mexico: Investigation Nos. 731-TA-1105-1106 (Review). By order of...

  4. 78 FR 47006 - Lemon Juice From Argentina and Mexico

    Science.gov (United States)

    2013-08-02

    ... Argentina and Mexico Determination On the basis of the record \\1\\ developed in the subject five-year reviews... determines that termination of the suspended antidumping duty investigation on lemon juice from Mexico would...), entitled Lemon Juice from Argentina and Mexico: Investigation Nos. 731-TA-1105-1106 (Review). By order of...

  5. CALYPTRANTHES TRICONA (MYRTACEAE, NUEVA CITA PARA LA FLORA ARGENTINA

    Directory of Open Access Journals (Sweden)

    Sara G. Tressens

    1996-01-01

    Full Text Available Calyptranthes tricona D. Legrand (Myrtaceae es reportada por primera vez para la Argentina.  Se incluyen una descripción y una ilustración. Se presenta un clave para la identificación de las especies argentinas de Calyptranthes se da. Se discuten algunas observaciones sobre la nomenclatura C.concinna DC.

  6. Potential renewable energy resources of the Lerma Valley, Salta, Argentina for its strategic territorial planning

    Energy Technology Data Exchange (ETDEWEB)

    Belmonte, S.; Viramonte, J.G. [Instituto GEONORTE, Facultad de Ciencias Naturales, Universidad Nacional de Salta and CONICET, Avda. Bolivia 5150, Salta CP 4400 (Argentina); Nunez, V. [Instituto de Recursos Naturales y Ecodesarrollo (IRNED), Facultad de Ciencias Naturales, Universidad Nacional de Salta, Avda. Bolivia 5150, Campo Castanares, Salta CP 4400 (Argentina); Franco, J. [Instituto Nacional de Energias No Convencionales (INENCO), Facultad de Ciencias Exactas, Universidad Nacional de Salta, CONICET, Avda. Bolivia 5150, Salta CP 4400 (Argentina)

    2009-08-15

    Renewable energy sources are considered as strategic opportunities to improve the population's quality of life, to promote the development of more efficient and equitable economic systems, and to favor environmental sustainability in the territorial planning of Lerma Valley (Salta, Argentina). The mapping in raster format (each pixel having a reference value) of the potential renewable energy sources (solar, wind, biomass, hydraulic, mixed) is essential to define ideal locations for different types of renewable applications, and to plan suitable strategies for its implementation. It is necessary considering environmental diversity and site conditions (topographic, natural resource, infrastructure and service availability, social and economical) of the intervention area. Different methodologies are used for mapping of potential energy resources. Solar radiation is spatialized through the application of statistical regressions between altitude, latitude, precise incident solar radiation records, and radiation data estimated with the Geosol V.2.0. trademark software. The Argentina Map program is used for the wind potential resource modeling. It requires as inputs: a Digital Elevation Model, a land use and cover map (to determine roughness), and measured and/or estimated wind speed and frequency data. The hydroelectric potential for microturbine applications is calculated from the topographic drop and the annual mean flow in cumulative models, through the application of the Idrisi Kilimanjaro trademark 's runoff tool; while the power densities are compared at the watershed. Biomass potential (at this exploratory stage), is interpreted from the available biomass type (land use and cover map), its energy application availability, and some quantitative indicators associated with the biomass types identified as priority. In conclusion, the renewable energy potential in Lerma Valley is very high and diverse, and its close connection with social

  7. La familia Cyatheaceae (Pteridophyta en Argentina The family Cyatheaceae (Pteridophyta in Argentina

    Directory of Open Access Journals (Sweden)

    Gonzalo J Marquez

    2010-06-01

    Full Text Available La familia Cyatheaceae comprende alrededor de 500 especies de helechos arborescentes. Su distribución es pantropical y en Argentina se encuentra representada por 4 especies, reunidas en los géneros Alsophila y Cyathea: A. setosa, A. odonelliana, C. atrovirens y C. delgadii. En este trabajo se presenta una actualización de la información disponible hasta el momento referente a estas especies. Se exponen microfotografías de las esporas, que presentan la superficie con lomos en Alsophila y con cordones en Cyathea. Se ilustran los indusios y escamas de la base de los pecíolos, que son de importancia fundamental para la diferenciación de las especies estudiadas. Asimismo se presenta un mapa de distribución y una clave de las especies que crecen en Argentina.The family Cyatheaceae comprises about 500 species of tree ferns. Their distribution is pantropical and in Argentina is represented by four species, grouped in genera Alsophila y Cyathea: A. setosa, A. odonelliana, C. atrovirens and C. delgadii. In this paper, an update of the available information of the mentioned species is presented. A key to diferentiate the species growing in Argentina, their descriptions and a distribution map are also given. Spores are ridged in Alsophila and with rodlets in Cyathea. Indusia and scales of petiole basis are also illustrated.

  8. Solar Observations at Submillimeter Wavelengths

    Science.gov (United States)

    Kaufmann, P.

    We review earlier to recent observational evidences and theoretical motivations leading to a renewed interest to observe flares in the submillimeter (submm) - infrared (IR) range of wavelengths. We describe the new solar dedicated submillimeter wave telescope which began operations at El Leoncito in the Argentina Andes: the SST project. It consists of focal plane arrays of two 405 GHz and four 212 GHz radiometers placed in a 1.5-m radome-enclosed Cassegrain antenna, operating simultaneously with one millisecond time resolution. The first solar events analyzed exhibited the onset of rapid submm-wave spikes (100-300 ms), well associated to other flare manifestations, especially at X-rays. The spikes positions were found scattered over the flaring source by tens of arcseconds. For one event an excellent association was found between the gamma-ray emission time profile and the rate of occurrence of submm-wave rapid spikes. The preliminary results favour the idea that bulk burst emissions are a response to numerous fast energetic injections, discrete in time, produced at different spatial positions over the flaring region. Coronal mass ejections were associated to the events studied. Their trajectories extrapolated to the solar surface appear to correspond to the onset time of the submm-wave spikes, which might represent an early signature of the CME's initial acceleration process.

  9. Solar Photovoltaic

    OpenAIRE

    Wang, Chen; Lu, Yuefeng

    2016-01-01

    In the 21st century, human demand for new energy sources is urgent, because the traditional fossil energy is unable to meet human needs, and the fossil resource will make pollution, in this situation, solar energy gradually into the vision of scientists. As science advances, humans can already extensive use of solar energy to generate electricity. Solar energy is an inexhaustible and clean energy. In the global energy crisis, environmental pollution is the growing problem of today. The us...

  10. Solar magnetohydrodynamics

    International Nuclear Information System (INIS)

    Priest, E.R.

    1982-01-01

    The book serves several purposes. First set of chapters gives a concise general introduction to solar physics. In a second set the basic methods of magnetohydrodynamics are developed. A third set of chapters is an account of current theories for observed phenomena. The book is suitable for a course in solar physics and it also provides a comprehensive review of present magnetohydrodynamical models in solar physics. (SC)

  11. Solar constraints

    International Nuclear Information System (INIS)

    Provost, J.

    1984-01-01

    Accurate tests of the theory of stellar structure and evolution are available from the Sun's observations. The solar constraints are reviewed, with a special attention to the recent progress in observing global solar oscillations. Each constraint is sensitive to a given region of the Sun. The present solar models (standard, low Z, mixed) are discussed with respect to neutrino flux, low and high degree five-minute oscillations and low degree internal gravity modes. It appears that actually there do not exist solar models able to fully account for all the observed quantities. (Auth.)

  12. Solar Simulator

    Science.gov (United States)

    1981-01-01

    Oriel Corporation's simulators have a high pressure xenon lamp whose reflected light is processed by an optical system to produce a uniform solar beam. Because of many different types of applications, the simulators must be adjustable to replicate many different areas of the solar radiation spectrum. Simulators are laboratory tools for such purposes as testing and calibrating solar cells, or other solar energy systems, testing dyes, paints and pigments, pharmaceuticals and cosmetic preparations, plant and animal studies, food and agriculture studies and oceanographic research.

  13. Tobacco industry targeting youth in Argentina

    Science.gov (United States)

    Braun, S; Mejia, R; Ling, P M; Pérez-Stable, E J

    2013-01-01

    Background/aim Argentina has one of the highest cigarette smoking rates among both men and women in the Americas and no legislated restrictions on tobacco industry advertising. The tobacco industry has traditionally expanded markets by targeting adolescents and young adults. The objective of this study was to determine whether and how the tobacco industry promotes cigarettes to adolescents in Argentina. Methods We conducted a systematic search of tobacco industry documents available through the internet dated between 1995 and 2004 using standard search terms to identify marketing strategies in Argentina. A selected review of the four leading newspapers and nine magazines with reported high readership among adolescents was completed. The selected print media were searched for tobacco images and these were classified as advertisements if associated with a commercial product or as a story if not. Results The tobacco industry used market segmentation as a strategy to target Argentinean consumers. British American Tobacco (BAT) undertook a young adult psychographic study and classified them as “progressives”, “Jurassics” or “conservatives” and “crudos” or “spoiled brats”. BAT marketed Lucky Strike to the “progressives” using Hollywood movies as a vehicle. The tobacco industry also targeted their national brands to the conservatives and linked these brands with “nationalistic values” in advertising campaigns. Philip Morris promoted Marlboro by sponsoring activities directed at young people and they launched the 10 cigarettes packet as a starter vehicle. Conclusions The tobacco industry used psychographic segmentation of the population and developed advertising strategies focused on youth. Tobacco control researchers and advocates must be able to address these strategies in counter-marketing interventions. PMID:18299308

  14. Microencapsulación de tramadol en ácido poliláctico mediante secado por aspersión Microencapsulation of Tramadol in polyactic acid by aspersion drying

    Directory of Open Access Journals (Sweden)

    Orestes Darío López Hernández

    2010-12-01

    Full Text Available Un tema de gran interés para la industria farmacéutica moderna lo constituye sin duda, la búsqueda de tecnologías para la obtención de formas farmacéuticas para la administración y transporte de citostáticos, antiinflamatorios, péptidos y hormonas, entre otros fármacos, que impliquen una reducción de su toxicidad o una liberación controlada del principio activo para lograr con ello un aumento de su eficacia. En el presente trabajo se estudió la influencia del flujo de líquido de alimentación, del flujo de aire de atomización y de secado, y se evaluaron diferentes características fisicoquímicas y morfológicas (tamaño, forma, porosidad y distribución de tamaño de partículas, eficiencia de encapsulación del principio activo de microesferas de tramadol. Como resultado se obtuvo que es posible lograr microesferas con un tamaño de 18,93 ± 2,31 µm con forma esférica, una superficie no porosa, y se demostró mediante difractometría de rayos X la encapsulación del tramadol en el polímero.An interesting subject for pharmaceutical industry is the search of technologies to achieve pharmaceutical ways for administration and transportation of cytostatics, anti-inflammatories, peptides and hormones among other drugs implicating a reduction of its toxicity or a contolled releasing of active principle to increase its effectiveness. In present paper authors studied the influence of fluid flow in feeding, of atomization air and of driying; different physicochemical and morphological features (size, shape, porosity and distribution in the particles size, and the effectiveness of active principle encapsulation of Tramadol's microspheres. As result, it was possible to achieve microspheres of 18.93 ± 2.31 µm with an spherical shape, a non-porous surface demostrating it by X-ray difractometry and Tramadol encapsulation in the polymer.

  15. Neoliberalism and political actors in contemporary Argentina

    Directory of Open Access Journals (Sweden)

    Juan Manuel Reynares

    2017-11-01

    Full Text Available In this paper we set out a critical reading of the literature on political neoliberal actors in Argentina. We consider that the concentration of these studies in the national level has to do with a definition of neoliberalism as a set of economical and structural macro politics. We propose to define neoliberalism as a technology of government that intends to hegemonize an “enterprise form” in different social spheres, articulating a symbolical framework in a contingent and contentious way. This insight allows analyzing neoliberal identification processes as heterogeneous trajectories with diverse geographic and temporal scopes.

  16. JOURNALISM STUDIES IN ARGENTINA: BACKGROUND AND QUESTIONS

    Directory of Open Access Journals (Sweden)

    Adriana Amado

    2014-06-01

    Full Text Available This article summarizes the background of empirical journalism studies in Argentina.  In recent publications, researchers have consistently underscored the lack of data on the profession and the scarce development of theoretical frameworks related to journalism studies.  The local investigations have prioritized approaches and methods that do not give the whole picture of the population of journalists. Most of the research tends to equate media analysis and media messages with journalism study and keeps on failing to provide data that allows for learning about the working conditions and the professional profile of the Argentinean journalists.

  17. NUEVAS CITAS DE ASCLEPIADACEAE PARA ARGENTINA

    Directory of Open Access Journals (Sweden)

    Sergio A Cáceres Moral

    1989-01-01

    Full Text Available Dos especies no mencionadas anteriormente de la Argentina son tratadas e ilustradas: Oxypetalum molle Hook. et Arn. y Oxypetalum ineanum Fourn. Oxypetalum appendieulatum Mart. et Zucc., Oxypetalum confusum Malme, Oxypetalum jörgensenii Meyer, Oxypetalum microphyllum Hook. et Arn., Oxypetalum pannosum Decaisne, Oxypetalum stipatum Malme, Funastrum flavum (Decaisne Malme y Blepharodon lineare (Decaisne Decaisne se registran por primera vez para la flora de Corrientes ..

  18. Solar cooking

    Science.gov (United States)

    Over two billion people face fuel wood shortages, causing tremendous personal and environmental stress. Over 4 million people die prematurely from indoor air pollution. Solar cooking can reduce fuel wood consumption and indoor air pollution. Solar cooking has been practiced and published since th...

  19. Solar Sprint

    Science.gov (United States)

    Tabor, Richard; Anderson, Stephen

    2007-01-01

    In the "Solar Sprint" activity, students design, test, and race a solar-powered car built with Legos. The use of ratios is incorporated to simulate the actual work of scientists and engineers. This method encourages fourth-grade students to think about multiple variables and stimulates their curiosity when an activity doesn't come out as…

  20. Solar thermal

    International Nuclear Information System (INIS)

    Jones, J.

    2006-01-01

    While wind power is widely acknowledged as the most developed of the 'new' renewables, the number two technology, in terms of installed capacity functioning worldwide, is solar heating, or solar thermal. The author has investigated recent industry reports on how these markets are developing. The authors of an International Energy Agency (IEA) survey studied 41 countries in depth at the end of 2004, revealing that 141 million m 3 - corresponding to an installed capacity of 98.4 GWth - were installed in the sample countries (these nations represent 3.74 billion people, about 57% of the world's population). The installed capacity within the areas studied represents approximately 85%-90% of the solar thermal market worldwide. The use of solar heating varies greatly between countries - even close neighbours - and between economic regions. Its uptake often has more to do with policy than solar resource. There is also different uptake of technology. In China, Europe and Japan, plants with flat-plate and evacuated tube collectors are used, mainly to heat water and for space heating. Unglazed plastic collectors, used mainly for swimming pool heating, meanwhile, dominate the North American markets. Though the majority of solar heating installations today are installed on domestic rooftops, the larger-scale installations should not be overlooked. One important part of the market is the hotel sector - in particular hotels in locations that serve the seasonal summer holiday market, where solar is extremely effective. Likewise hospitals and residential homes, multi-family apartment blocks and sports centres are all good examples of places where solar thermal can deliver results. There are also a growing number of industrial applications, where solar thermal can meet the hot water needs (and possibly more) of a range of industries, such as food processing and agriculture. The ability of solar to provide a heat source for cooling is expected to become increasingly important as

  1. Solar thermal

    Energy Technology Data Exchange (ETDEWEB)

    Jones, J.

    2006-07-15

    While wind power is widely acknowledged as the most developed of the 'new' renewables, the number two technology, in terms of installed capacity functioning worldwide, is solar heating, or solar thermal. The author has investigated recent industry reports on how these markets are developing. The authors of an International Energy Agency (IEA) survey studied 41 countries in depth at the end of 2004, revealing that 141 million m{sup 3} - corresponding to an installed capacity of 98.4 GWth - were installed in the sample countries (these nations represent 3.74 billion people, about 57% of the world's population). The installed capacity within the areas studied represents approximately 85%-90% of the solar thermal market worldwide. The use of solar heating varies greatly between countries - even close neighbours - and between economic regions. Its uptake often has more to do with policy than solar resource. There is also different uptake of technology. In China, Europe and Japan, plants with flat-plate and evacuated tube collectors are used, mainly to heat water and for space heating. Unglazed plastic collectors, used mainly for swimming pool heating, meanwhile, dominate the North American markets. Though the majority of solar heating installations today are installed on domestic rooftops, the larger-scale installations should not be overlooked. One important part of the market is the hotel sector - in particular hotels in locations that serve the seasonal summer holiday market, where solar is extremely effective. Likewise hospitals and residential homes, multi-family apartment blocks and sports centres are all good examples of places where solar thermal can deliver results. There are also a growing number of industrial applications, where solar thermal can meet the hot water needs (and possibly more) of a range of industries, such as food processing and agriculture. The ability of solar to provide a heat source for cooling is expected to become

  2. Solar energy: photovoltaics

    International Nuclear Information System (INIS)

    Goetzberger, A.; Voss, B.; Knobloch, J.

    1994-01-01

    This textbooks covers the following topics: foundations of photovoltaics, solar energy, P-N junctions, physics of solar cells, high-efficiency solar cells, technology of Si solar cells, other solar cells, photovoltaic applications. (orig.)

  3. Yugoslav teachers in Argentina 1939-1944

    Directory of Open Access Journals (Sweden)

    Stefanović-Banović Milesa

    2014-01-01

    Full Text Available In this paper we present reports of Yugoslav teachers who held classes to immigrants in Argentina 1939-1944, organized by the government of Kingdom of Yugoslavia. Teachers’ reports to Yugoslav Embassy in Buenos Aires testify of Kingdom of Yugoslavia efforts to oppose assimilation and promote and strengthen “Yugoslav national unity”. The reports also describe general social circumstances of Yugoslav immigrants, show various details from their everyday life and contain valuable data on numerous political, economic, social and cultural problems of this diaspora in Argentina and their relationship with motherland. We believe that archive materials presented in this paper opens numerous questions which could be topics of separate researches. Some of them could be the following: To which extent the teachers’ reports represented the actual situation and to which they were shaped to match policy and expectations of Kingdom of Yugoslavia? What was the actual influence of teachers to spreading the “national unity” among immigrants? Have their work left trace in Yugoslav diaspora and in which way? Beside all of the open issues, it is certain that teachers’ reports contain valuable data on immigrants’ everyday life, curriculum, schooling conditions, relationship with motherland, etc. [Projekat Ministarstva nauke Republike Srbije, br. 47016: Interdisciplinarno istraživanje kulturnog i jezičkog nasleđa Srbije. Izrada multimedijalnog internet portala "Pojmovnik srpske kulture"

  4. Basic data for uranium prospecting in Argentina

    International Nuclear Information System (INIS)

    Belluco, A.; Rodriguez, E.; Martinez, C.; Marinkeff, K.

    1977-01-01

    After dealing briefly with the geochemical cycle of uranium in the earth's crust, and indicating the principal conditions under which different types of deposits are formed, the paper goes on to determine the uraniferous are of mainland Argentina (approximately 900000 km 2 ). Since evidence for the presence of uranium and other radioactive elements in many parts of the country has long been available, an attempt was made to systemize the existing information and classify the uraniferous sites so as to determine their temporal, spatial and genetic relationships with the different containing rocks. In addition, a study was made of the factors which contribute to the concentration of uranium in rocks which are accessible to prospecting (litho-stratigraphy, geological history, mettallogenic cycles, etc.). On the basis of these studies and considering the regional geology of Argentina, 21 ''regional environments'' were defined with varying degrees of probability of containing uranium; these environments will be submitted to long-term regional prospecting studies. It was necessary, however, to make a further sub-division into more homogeneous units with more clearly graded levels of priority, with the result that there are 65 ''prospecting units''. Each of these units, in order of priority, will be subjected to systematic prospecting. Exploratory work on a suitable scale will be carried out in the ''uraniferous'' districts of the ''prospecting units''. The main features of Argentine geology relating to the likelihood of uranium occurrences are briefly described, and maps of the large geotechtonic areas and the ''regional environments'' are included. (author)

  5. The industrial nuclear fuel cycle in Argentina

    International Nuclear Information System (INIS)

    Koll, J.H.; Kittl, J.E.; Parera, C.A.; Coppa, R.C.; Aguirre, E.J.

    1977-01-01

    The nuclear power program of Argentina for the period 1976-85 is described, as a basis to indicate fuel requirements and the consequent implementation of a national fuel cycle industry. Fuel cycle activities in Argentina were initiated as soon as 1951-2 in the prospection and mining activities through the country. Following this step, yellow-cake production was initiated in plants of limited capacity. National production of uranium concentrate has met requirements up to the present time, and will continue to do so until the Sierra Pintada Industrial Complex starts operation in 1979. Presently, there is a gap in local production of uranium dioxide and fuel elements for the Atucha power station, which are produced abroad using Argentine uranium concentrate. With its background, the argentine program for the installation of nuclear fuel cycle industries is described, and the techno-economical implications considered. Individual projects are reviewed, as well as the present and planned infrastructure needed to support the industrial effort [es

  6. Derechos humanos y sexualidad en la Argentina

    Directory of Open Access Journals (Sweden)

    Mario Pecheny

    2006-12-01

    Full Text Available Este artículo presenta un panorama de la situación de los derechos que tienen que ver con la sexualidad, en la Argentina contemporánea. Basándose principalmente en la legislación positiva, se presenta en primer lugar una síntesis del sistema legal y político, resumiendo a continuación el proceso de inclusión de los derechos sexuales, sobre todo desde 1983, cuando se recuperó la democracia. Las temáticas abordadas son: igualdad civil y conyugalidad, orientación sexual e identidad de género, reproducción, aborto, violencia de género y violencia sexual, VIH/sida, y explotación y trabajo sexual. El artículo concluye con una reflexión sobre las principales deudas pendientes.This paper presents an overview of the situation concerning the rights related to sexuality in contemporary Argentina. Based specially on the positive legislation, it is primarily presented a synthesis of the legal and political system. Next, the paper summarizes the process of inclusion of the sexual rights, mainly since 1983, when democracy has been recovered. The following issues are addressed: civil equality and conjugality; sexual orientation and gender identity; reproduction; abortion; gender a sexual violence; HIV/Aids; and exploitation and sexual work. The paper ends with a consideration about the still remaining doubts.

  7. [The psychologists in Argentina. Quantitative data].

    Science.gov (United States)

    Alonso, M M

    1994-03-01

    A partial report from a study dealing with Psychology's current status in Argentina is presented. Pursuant to this preliminary study 36,128 psychologists have taken their degree at both State and private universities in Argentina--between 1956, when the first Department of Psychology was created, and 1992. So, over a 32.5-million population (as per the 1991 census), there is a psychologist every 897 inhabitants, or 111 psychologists every 100,000 inhabitants. According to psychologists' geographical distribution, the highest density is to be found in the capital city of Buenos Aires (one psychologist every 246 inhabitants) while the lowest density is to be found in the Province of Chaco (one psychologist every 17,465 inhabitants). During year 1993, a total of 26,726 students have been studying Psychology at the different Argentine universities: Of these, 6,858 have taken their Psychology degree during this academic year. A great majority of psychologists work in the clinical field, being Psychoanalysis their prominent theoretical orientation. Ladies psychologists supposedly account for 85% of the overall number of psychologists. Psychological Associations have 24,878 active psychologists recorded, of which a great majority work in the clinical field.

  8. Difilobotriasis humana en la Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Semenas Liliana

    1997-01-01

    Full Text Available OBJETIVO: El objetivo del trabajo fué detectar hospedadores humanos en la zona andino patagónica argentina, teniendo en cuenta las prácticas de pesca desportiva y la importancia de los salmónidos dentro de la zona. MATERIAL Y METODO: Entre 1986 y 1995 se implementaron Campañas de Información en los laboratorios de Análisis Clínicos de la región andinopatagónica argentina, destinadas a lograr una detección más eficiente de la difilobotriasis, a través de análisis coproparasitológicos. RESULTADOS: Adicionalmente, se confeccionaron planillas destinadas a recoger información sobre las características de la infección, del tratamiento y del paciente. Durante este período se detectaron 13 nuevos casos humanos, por identificación directa del parásito o por la presencia de huevos en materia fecal. Las características de las infecciones responden a las descriptas para el género Diphyllobothrium. CONCLUSIONES: En la región, los salmónidos son los peces predilectos en la pesca deportiva. Estos peces, frecuentemente parasitados con larvas, constituyen la principal fuente de contagio para el hombre al ser consumidos insuficientemente cocidos o ahumados en frío.

  9. Difilobotriasis humana en la Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Liliana Semenas

    1997-06-01

    Full Text Available OBJETIVO: El objetivo del trabajo fué detectar hospedadores humanos en la zona andino patagónica argentina, teniendo en cuenta las prácticas de pesca desportiva y la importancia de los salmónidos dentro de la zona. MATERIAL Y METODO: Entre 1986 y 1995 se implementaron Campañas de Información en los laboratorios de Análisis Clínicos de la región andinopatagónica argentina, destinadas a lograr una detección más eficiente de la difilobotriasis, a través de análisis coproparasitológicos. RESULTADOS: Adicionalmente, se confeccionaron planillas destinadas a recoger información sobre las características de la infección, del tratamiento y del paciente. Durante este período se detectaron 13 nuevos casos humanos, por identificación directa del parásito o por la presencia de huevos en materia fecal. Las características de las infecciones responden a las descriptas para el género Diphyllobothrium. CONCLUSIONES: En la región, los salmónidos son los peces predilectos en la pesca deportiva. Estos peces, frecuentemente parasitados con larvas, constituyen la principal fuente de contagio para el hombre al ser consumidos insuficientemente cocidos o ahumados en frío.

  10. Brucellosis in buffalos from Corrientes northeast (Argentina

    Directory of Open Access Journals (Sweden)

    G. Crudeli

    2010-02-01

    Full Text Available Buffalo’s production represents an important option as input source in livestock systems located in areas with little profitability by cattle. In mostly farms, cattle and buffalos are breeding together, due that in Argentina, to carry out buffalo’s production is in an extensive way, with the aim to produce meat – mostly- milk – for this production nutritional supplements are used- and leathers. Brucellosis is zoonic illnesses from bacteria belong to Brucella which caused human human health problems by contaminated food ingestion or to those who are in touch with cattle. In Argentina, exist the National Control an Elimination Program for cattle Brucellosis, which include buffalos also, there is inclosed female vaccination and serologic segregation of positive reactants. Diagnosis techniques ruled for cattle brucellosis are BPA (Buffered Plate Agglutination, Tube seroaglutination and 2MercaptoEthanol. International reference test is Complement Fixation. By means of this present work, we pretend to evaluate the serologic diagnosis utility, ruled to the buffalos and compare obtained results by BPA, SAT and 2ME with Complement Fixation Test. In the present communication are presented results from the use of diagnosis techniques recommended by SENASA (National Service of Sanity and Quality Agro-Food to buffalo’s serums which belong to nine farms from NE Corrientes State. Obtained results show that association o BPA as Screening Test and SAT and 2ME as Confirmated Test has a valid correlation for the detection of positive animals with the reference technique Complement Fixation.

  11. Ten years of SLR production in Argentina

    Science.gov (United States)

    Pacheco, A.; Podestá, R.; Yin, Z.; Liu, W.; Actis, E.; Adarvez, S.; Quinteros, J.; Podestá, F.

    2017-07-01

    SLR technique is a proved astro-geodetic art with a significant power to contribute to Earth and Space Sciences. Therefore, scientific applications of SLR System are able to perform multiple tasks in the fields of Astrometry, Geodesy and Geophysics. The results we show here were obtained from satellite observations made at SLR 7406 Station of Observatorio Astronómico Félix Aguilar (OAFA) in San Juan, Argentina. The telescope was installed early on 2006, in concordance with an International Cooperation Agreement between Universidad Nacional de San Juan, Argentina and Chinese Academy of Sciences. In this abstract we show the current research being done with ILRS 7406 station: Length of day (LOD) and Angular velocity of Earth Rotation, calculated weekly; Pole Motion. ILRS7406 is daily surveying Pole coordinates x and y; Tracking SLR to GNSS constellations. SLR System contributes to the adjustment and validation of satellite GALILEO, GPS, GLONASS, and BEIDOU orbits. Our station is nowadays member of the new ITRF 2014 frame, and these past years has been one of the 3 highest producing SLR Stations on the ILRS net, composed of about 40 stations distributed all around the world. The obtained results during this first 10 years of experience are useful to enhance the traditional collaboration between OAFA and international services such as ILRS, IERS and NASA.

  12. Influence of Maltodextrin and Spray Drying Process Conditions on Sugarcane Juice Powder Quality / Influencia de la Maltodextrina y Condiciones del Proceso de Secado por Aspersión en la Calidad del Polvo de Jugo de Caña Panelera

    Directory of Open Access Journals (Sweden)

    Esteban Largo Ávila

    2014-12-01

    Full Text Available Abstract. Food powder liquid extracts obtained from fruits andvegetables can be manufactured using spray drying technologieswhile maintaining the quality attributes that are required by theindustrial sector. The aim of this study was to evaluate the effectof maltodextrin and spray drying process conditions on sugarcanejuice powder. A central composite design was used with a responsesurface analysis of four factors: (A maltodextrin (10-20%, (Binlet air temperature (130-150 °C, (C outlet air temperature (75-85 °C and (D atomization speed (22,000–26,000 rpm. Moisture,hygroscopicity, solubility, effective recovery and formation ofdeposits on the walls presented significant differences (P<0.05with respect to all factors, while, for water activity, no statisticaldifferences were observed. The optimization of the factors foundfor the drying operating conditions were: (A 20%, (B 130 °C, (C75 °C and (D 22,000 rpm, respectively. / Resumen. Polvos alimentarios de extractos líquidos obtenidos apartir de frutas y vegetales pueden ser manufacturados usandotecnologías de secado por aspersión y mantener los atributosde calidad requeridos en el sector industrial. El objetivo de esteestudio fue evaluar el efecto de la adición de maltodextrina y lascondiciones de procesamiento por secado por aspersión en laobtención de polvo de jugo de caña. Un diseño central compuestoy análisis mediante superficies de respuesta con cuatro factoresestadísticos fue establecido: (A maltodextrina (10-20%, (Btemperatura del aire de secado a la entrada (130-150 °C, (Ctemperatura del aire a la salida (75-85 °C y (D velocidad deldisco atomizador (22.000–26.000 rpm. Los resultados mostraronque las variables contenido de humedad del producto, solubilidad,recuperación efectiva y formación de depósitos de sólidos en lapared del secador son estadísticamente significativos (P<0,05 conrespecto a los factores estudiados, mientras que la actividad deagua del producto

  13. Overview and perspectives for Open Access development in Argentina

    Directory of Open Access Journals (Sweden)

    Sandra Miguel

    2013-04-01

    Full Text Available This paper provides an overview and perspectives for development of the Open Access movement in Argentina, within the global and regional (Latin American context. It outlines the evolution and current state of initiatives around the two main approaches to Open Access, the golden and green roads. The main Open Access policies and support of OA movement by governments in Latin American region, and particularly in Argentina, are highlighted, while recent studies on publishing practices and authors’ positions regarding Open Access are presented. The paper concludes that the prospects for development of OA in Argentina, both through golden and green roads are favorable, with their strengths and shortcomings

  14. Solar Newsletter | Solar Research | NREL

    Science.gov (United States)

    more about work by this consortium, which crosses national laboratories, on new materials and designs information on NREL's research and development of solar technologies. To receive new issues by email prize, focused on solar energy technologies, and will release the prize rules and open registration

  15. Solar electricity and solar fuels

    Science.gov (United States)

    Spiers, David J.

    1989-04-01

    The nature of solar radiation and its variation with location is described. The distribution of energy in the solar spectrum places immediate limits on the theoretical efficiency of conversion processes, since practical absorbers cannot convert all wavelengths received to useful energy. The principles of solar energy conversion methods are described. Absorption of solar energy can give rise to direct electrical generation, heating, or chemical change. Electrical generation from sunlight can be achieved by photovoltaic systems directly or by thermal systems which use solar heat to drive a heat engine and generator. The technology used and under research for promising ways of producing electricity or fuel from solar energy is described. Photovoltaic technology is established today for remote area, small power applications, and photovoltaic module sales alone are over 100 million dollars per year at present. The photovoltaic market has grown steadily since the mid-1970's, as prices have fallen continuously. Future energy options are briefly described. The merits of a sustainable energy economy, based on renewable energy resources, including solar energy, are emphasized, as this seems to provide the only hope of eliminating the problems caused by the build-up of atmospheric carbon dioxide, acid rain pollution and nuclear waste disposal. There is no doubt that clean fuels which were derived from solar energy and either did not involve carbon dioxide and used atmospheric carbon dioxide as the source dioxide as the source of carbon would be a worthy ideal. Methods described could one day achieve this.

  16. Solar magnetohydrodynamics

    International Nuclear Information System (INIS)

    Priest, E.R.

    1982-01-01

    Solar MHD is an important tool for understanding many solar phenomena. It also plays a crucial role in explaining the behaviour of more general cosmical magnetic fields and plasmas, since the Sun provides a natural laboratory in which such behaviour may be studied. While terrestrial experiments are invaluable in demonstrating general plasma properties, conclusions from them cannot be applied uncritically to solar plasmas and have in the past given rise to misconceptions about solar magnetic field behaviour. Important differences between a laboratory plasma on Earth and the Sun include the nature of boundary conditions, the energy balance, the effect of gravity and the size of the magnetic Reynolds number (generally of order unity on the Earth and very much larger on the Sun). The overall structure of the book is as follows. It begins with two introductory chapters on solar observations and the MHD equations. Then the fundamentals of MHD are developed in chapters on magnetostatics, waves, shocks, and instabilities. Finally, the theory is applied to the solar phenomena of atmospheric heating, sunspots, dynamos, flares, prominences, and the solar wind. (Auth.)

  17. Energy improvement of a conventional dwelling in Argentina through thermal simulation

    Energy Technology Data Exchange (ETDEWEB)

    Filippin, C. [CONICET-CC302, Santa Rosa 6300, La Pampa (Argentina); Flores Larsen, S. [INENCO-Instituto de Investigaciones en Energias No Convencionales, Universidad Nacional de Salta, CONICET, Avda. Bolivia 5150, CP 4400 Salta Capital (Argentina); Lopez Gay, E.

    2008-10-15

    This paper analyses the design, technology, thermal behaviour, and energy consumption of both a conventional and a refurbished dwelling located in a region with a temperate-cold climate in central Argentina. The thermal behaviour and the energy consumption of the conventional building were monitored during winter. The experimental data were analysed and included in a simulation of the transient thermal behaviour of the house. Measurements and simulation were in agreement, showing a mean deviation below 0.5{sup o}C. To reduce the heating and cooling loads, the dwelling was refurbished and its thermal behaviour was studied through a computer simulation, for the critical seasons (winter and summer) and for two occupancy schedules (with and without inhabitants). The refurbishment included passive solar heating, shading, and an insulated envelope. These successful changes allowed energy savings of 66% and 52% for winter and summer, respectively. (author)

  18. Tabaquismo durante el embarazo en Argentina y Uruguay Smoking during pregnancy in Argentina and Uruguay

    Directory of Open Access Journals (Sweden)

    Fernando Althabe

    2008-02-01

    Full Text Available Argentina y Uruguay están entre los países con mayor proporción de mujeres jóvenes fumadoras. Se desconoce cuál es la proporción exacta de ellas que fuman durante el embarazo así como las características de las que dejan de fumar y las que continúan fumando durante el embarazo. Realizamos una encuesta administrada por un/a entrevistador/a a 1512 mujeres embarazadas de 18 años o mayores (796 en Argentina; 716 en Uruguay, que concurrían a control prenatal en hospitales públicos de grandes conglomerados urbanos. 44% de las mujeres en Argentina y 53% en Uruguay habían sido o eran fumadoras. Durante el embarazo, 11% de las mujeres en Argentina y 18% en Uruguay continuaron fumando. En ambos países, la proporción de mujeres que vive con fumadores, permite fumar en el hogar y regularmente o siempre se encuentra en lugares cerrados con personas que estén fumando fue 49%, 46% y 20% entre las mujeres que nunca fumaron, 67%, 60% y 32% entre las que dejaron, y 78%, 75% y 52% entre las que continuaron fumando respectivamente. El estudio confirma un importante problema de salud pública y documenta que la exposición ambiental persiste en subgrupos de mujeres, aun en aquéllas que dejaron de fumar. Es importante que el sector de salud pública provea acceso a programas efectivos para dejar de fumar durante el embarazo. Cualquier nueva intervención a desarrollar que intente tener un éxito al menos moderado y sostenible, debiera incluir componentes que actúen sobre el entorno fumador de la mujer embarazada que fuma.Argentina and Uruguay are among the countries in which a large proportion of young women smoke. The rate of smokers during pregnancy in both countries is not well known, and data on the characteristics of women who quit smoking during pregnancy compared to those who continue smoking are not available. We conducted a survey including 1512 pregnant women >18 years old (796 in Argentina; 716 in Uruguay, during antenatal visits in

  19. Measurements of atmospheric fallout in Argentina; Determinacion del fallout atmosferico en la Republica Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Canoba, A C; Lopez, F O; Bruno, H A

    1998-11-01

    With the purpose of studying the radioactive fallout present in Argentina from atmospheric nuclear explosions tests that have been conducted recently, an environmental monitoring program, outside the influence of nuclear facilities of Argentina, was undertaken during 1996 and 1997. The levels of Cs-137 and Sr-90 were analysed in samples of air, deposited material (rainwater), milk, an average meal of a standard man and food. During this period, a total of 630 radiochemical analysis were performed on 325 samples of the different matrices described. The concentration levels of the radionuclides analysed in the different environmental matrices are presented and are compared with the values obtained in the environmental monitoring program done during the period 1960-1981. (author) 3 refs., 9 tabs. [Espanol] Con el proposito de estudiar la precipitacion radiactiva presente en la Republica Argentina, debido al ensayo de armas nucleares en la atmosfera realizadas en el pasado, se implemento el muestreo ambiental fuera de la zona de influencia de las instalaciones nucleares de la Argentina durante los anios 1996 y 1997. Se determinaron las concentraciones de cesio 137 y estroncio 90 en muestras de aire, deposito de material radiactivo (agua de lluvia), leche, dieta promedio de un individuo estandar y en alimentos varios. Se realizaron, durante el periodo mencionado, un total de 630 determinaciones radioquimicas sobre 325 muestras de las diferentes matrices mencionadas. Se presentan los niveles de concentracion de los radionucleidos analizados en las distintas matrices ambientales y se comparan los valores obtenidos en los monitoreos realizados durante el periodo 1960-1981. (autor)

  20. Solar collectors

    Energy Technology Data Exchange (ETDEWEB)

    Hullmann, H; Schmidt, B [Technische Univ. Hannover (Germany, F.R.). Inst. fuer Industrialisierung des Bauens

    1976-01-01

    The utilisation possibilities of solar energy for the energy supplying of buildings are becoming increasingly more significant. Solar research at the moment aims predominantly with a high level of efficiency and therefore making accessible a significant range of applications for solar technology. Parallel to this are attempts to effect the saving of energy, be it in the demand for energy-saving constructions or in the increasing development and application of rational energy utilisation by technologists. The most important point of these activities at the moment, is still technological methods.

  1. Solar neutrinos

    International Nuclear Information System (INIS)

    Schatzman, E.

    1983-01-01

    The solar energy is produced by a series of nuclear reactions taking place in the deep interior of the sun. Some of these reactions produce neutrinos which may be detected, the proper detection system being available. The results of the Davis experiment (with 37 Cl) are given, showing a deficiency in the solar neutrino flux. The relevant explanation is either a property of the neutrino or an important change in the physics of the solar models. The prospect of a new experiment (with 71 Ga) is important as it will decide which of the two explanations is correct [fr

  2. Concentrating Solar Power Projects - Planta Solar 20 | Concentrating Solar

    Science.gov (United States)

    Power | NREL 20 This page provides information on Planta Solar 20, a concentrating solar power Solar's Planta Solar 20 (PS20) is a 20-megawatt power tower plant being constructed next to the PS10 tower and increasing incident solar radiation capture will increase net electrical power output by 10

  3. Radioactive waste with 14C in Argentina

    International Nuclear Information System (INIS)

    Di Lello, D.S.

    2009-01-01

    14 C is a long half-life radioisotope, which is present in radioactive waste generated during the operation and decommissioning of nuclear power plants. 14 C can also be found in waste generated by medical diagnostic laboratories or any one generated by fields that deal with research and development (mainly connected with the biochemists area). According to international precedents the disposal of 14 C based on the final amount found in radioactive waste and its chemical form have conditioned the design and operation of the facilities (either because of the amount of it or the chemical form in which 14 C was present). We have to take into account that the design of facilities for radioactive waste disposal is included among the obligations of the National Radioactive Waste Management Program (PNGRR). It is absolutely necessary to count with enough information about the characteristics of any waste containing 14 C that is generated in Argentina, in order to be able to fulfil the requirements previously mentioned. The main characteristics of interest in the frame of the present project are: a) the principal reactions that take place for the formation of 14 C; b) The specific concentration of activity in materials where this radio nuclei is formed or is accumulated; c) To know which is the current step in the process of managing these wastes (in Argentina and all over the world). Either if it refers to bulk or conditioned storage, inside the generating facility; d) Transportation possibilities of 14 C under these conditions; e) The accumulated volume and the generation rate of this kind of waste in Argentina. This paper presents an initial collection and evaluation of the information related to the characteristics already mentioned, having gathered published material from the literature and information in the PNGRR up to this moment. The description of the characteristics of the radioactive waste containing 14 C from nuclear power plants, hospitals and research and

  4. Argentina's regulatory body: its communication activities

    International Nuclear Information System (INIS)

    Cesario, Pablo A.; Terigi, Gabriel E.

    2008-01-01

    Full text: The Nuclear Regulatory Authority of Argentina (ARN) is empowered to regulate and control the nuclear activity with regard to radiation and nuclear safety, physical protection and nuclear non-proliferation issues. It must also advise the Executive on issues under its purview. The objective of the Nuclear Regulatory Authority is to establish, develop and enforce a regulatory system applicable to all nuclear activities carried out in Argentina. Two of the goals of this regulatory system are to provide an appropriate standard of protection for individuals against the harmful effects of ionizing radiation, and to maintain a reasonable degree of radiological and nuclear safety in the nuclear activities performed in Argentina. The responsibility of the radiation protection community in performing the tasks to accomplish this goals is twofold. On one hand, it must ensure a high technical quality in performing these functions. It must also provide information on its activities which has to be accurate, comprehensive and understandable. The way a society understands the concept of 'risk' needs to be kept in mind. Risk perception is the subjective judgment that people make about the characteristics and severity of a risk. Cultural theory refers to theories of risk perception that focus on culture, rather than individual psychology as an explanation for differences in risk judgments. It is widely agreed that trust is a key factor in influencing people's perceptions of risk. It is understood there are two main ways trust may impact in risk perceptions: an activity is perceived as more risky if the people or agencies managing it are perceived as untrustworthy; and information presented by trusted sources is given more credibility than information from untrusted sources. One of the primary purposes of ARN's Communication Program is to provide a means whereby those engaged in radiation protection activities may communicate more readily with each other and the public and

  5. Observaciones solares en H alfa : Innovaciones técnicas y aplicaciones científicas

    OpenAIRE

    Fernández Borda, Roberto A.

    2001-01-01

    El objetivo central de esta Tesis de Doctorado es la puesta a punto del HASTA (Ha Solar Telescope for Argentina) para su aplicación a las observaciones solares. El HASTAes un telescopio solar provisto de un filtro Lyot sintonizable, optimizado para trabajar en 6562.7 ± 1 Å con un ancho de banda de 0.3 Å. Las imágenes son adquiridas por una cámara CCD (Charge Coupled Device) de 1280 x 1024 pixeles. Cada pier del instrumento subtiende 2.07 arcseg obteniéndose una resolución espacial de ~ 4 arcs...

  6. Solar prominences

    CERN Document Server

    Engvold, Oddbjørn

    2015-01-01

    This volume presents the latest research results on solar prominences, including new developments on e.g. chirality, fine structure, magnetism, diagnostic tools and relevant solar plasma physics. In 1875 solar prominences, as seen out of the solar limb, were described by P.A. Secchi in his book Le Soleil as "gigantic pink or peach-flower coloured flames". The development of spectroscopy, coronagraphy and polarimetry brought tremendous observational advances in the twentieth century. The authors present and discuss exciting new challenges (resulting from observations made by space and ground-based telescopes in the 1990s and the first decade of the 21st century) concerning the diagnostics of prominences, their formation, their life time and their eruption along with their impact in the heliosphere (including the Earth). The book starts with a general introduction of the prominence “object” with some historical background on observations and instrumentation. In the next chapter, the various forms of promine...

  7. Solar chulha

    Energy Technology Data Exchange (ETDEWEB)

    Jadhao, P. H. [Department of Physics J.D. Institute of Engg. & Tech. Yavatmal (India); Patrikar, S. R. [Department of Physics VNIT, Nagpur (India)

    2016-05-06

    The main goal of the proposed system is to transfer energy from sun to the cooking load that is located in the kitchen. The energy is first collected by the solar collector lens system and two curve bars of same radius of curvature are mounted parallel and adjacent to each other at different height the solar collector is clamed on this two bars such that solar collector is exactly perpendicular to sunlight. The topology includes an additional feature which is window in the wall through which the beam is collimated is directed in the of kitchen. The solar energy that is collected is directed by the mirror system into the kitchen, where it is redirected to cooking platform located in the kitchen. The special feature in this system full Indian meal can be made since cooking platform is indoors.

  8. Solar Radio

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Scientists monitor the structure of the solar corona, the outer most regions of the Sun's atmosphere, using radio waves (100?s of MHz to 10?s of GHz). Variations in...

  9. Solar Energy

    Science.gov (United States)

    Building Design and Construction, 1977

    1977-01-01

    Describes 21 completed projects now using solar energy for heating, cooling, or electricity. Included are elementary schools in Atlanta and San Diego, a technical school in Detroit, and Trinity University in San Antonio, Texas. (MLF)

  10. The multiple applications of the nuclear techniques in Argentina

    International Nuclear Information System (INIS)

    Manzini, Alberto C.

    2001-01-01

    A review is given of the use of nuclear technology in Argentina, especially in the field of the production of radioisotopes and radiopharmaceuticals, nuclear medicine, and industrial applications. The applications of ionizing radiation are also reviewed

  11. All projects related to Argentina | Page 8 | IDRC - International ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Health Financing, Equity and Poverty in Latin America ... Region: North and Central America, South America, Argentina, Brazil, Chile, Colombia, Costa ... one of the most serious but least publicized public health problems in Latin America.

  12. The bloodsucking biting midges of Argentina (Diptera: Ceratopogonidae

    Directory of Open Access Journals (Sweden)

    Gustavo R Spinelli

    2005-04-01

    Full Text Available A key is presented for the identification of the adults of 54 species of bloodsucking ceratopogonids, 51 of which are known inhabitants of Argentina, and Culicoides uruguayensis Ronderos, C. pifanoi Ortiz, and C. trilineatus Fox, which are known to occur in bordering Uruguay and Paraguay. Wing photographs are provided of females of the 45 species of Culicoides. Three new species of Culicoides Latreille from Northeastern Argentina are described and illustrated: C. austroparaensis Spinelli, C. bachmanni Spinelli, and C. williamsi Spinelli. The following six species are recorded for the first time from Argentina and/or bordering localities in Paraguay: Leptoconops brasiliensis (Lutz, C. gabaldoni Ortiz, C. ginesi Ortiz, C. pifanoi Ortiz, C. pseudocrescentis Tavares and Luna Dias, and C. trilineatus; and C. estevezae Ronderos and Spinelli is newly recorded from Misiones province of Argentina. C. lopesi Barretto is excluded from the Argentinean ceratopogonid fauna.

  13. Bolivia's gas heads for Brazil as Argentina waits - and watches

    International Nuclear Information System (INIS)

    Knight, P.

    1998-01-01

    The first 1,800 km stretch of a 3,400 km natural gas pipeline from Bolivia to Brazil will start operating in December. First planned 50 years ago, the pipeline has long been expected to result in an immediate surge of gas use in Brazil. However, impending deep recession in Brazil makes this prospect less likely despite the power shortages which indicate the need for considerable gas imports. Initially, most Bolivian gas will flow through Brazil to Argentina. But gas production is expanding rapidly in Argentina and the supply contract with Bolivia ends in 1999. Plans are well advanced to build two gas lines into the south of the Brazil from Argentina. Ultimately, it is anticipated that Argentina, which has abundant reserves and a virtually saturated domestic market, will become the principal source of natural gas for Brazil. (UK)

  14. The regulatory control of radioactive sources in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Rojkind, Roberto Hector [Autoridade Regulatoria Nuclear, Buenos Aires (Argentina)

    1997-12-31

    Argentina has been conducting nuclear activities for more than forty years, and as early as in 1956 established a Regulatory Authority. Procedures for compliance monitoring and enforcement have been in use in the regulatory control of radioactive sources, and regulatory standards and regulations had been set in Argentina, before the accident in Goiania. The conclusions drawn from that accident encouraged in Argentina the improvement of some regulatory procedures and helped to enhance the quality of the regulatory process. Therefore, the effectiveness of the control of spent radioactive sources has gradually increased, and enforcement actions to prevent radioactive sources ending up in the public domain improved. Some lessons learned in Argentina from the accident in Goiania and the main characteristics of an effective enforcement program helpful to prevent radiological accidents in industrial, medical, research and teaching uses of radioactive sources are presented. (author) 9 refs; e-mail: rrojkind at sede.arn.gov.br

  15. Argentina: Political and Economic Conditions and U.S. Relations

    National Research Council Canada - National Science Library

    Sullivan, Mark P

    2006-01-01

    Argentina's restructuring of over $100 billion in defaulted bond debt in June 2005 demonstrated the country's emergence from its 2001-2002 economic crisis that had caused severe stress on the political system...

  16. Nuclear safeguards in Brazil and Argentina: 25 years of ABACC

    Science.gov (United States)

    Kassenova, Togzhan

    2017-11-01

    As possessors of advanced nuclear technology, Brazil and Argentina bear special responsibility for helping the international community and neighbors in their region feel confident that their nuclear programs are peaceful, secure, and safe. Over the past 25 years, the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) has played an indispensable role in strengthening such confidence by implementing nuclear safeguards in the two countries. Today, ABACC carries out safeguards inspections at a total of 76 nuclear facilities in Brazil and Argentina. This article describes how Brazil and Argentina view trends in the global nonproliferation regime and international nuclear safeguards, and explains how these trends relate to unique challenges and opportunities facing Brazil, Argentina, and ABACC.

  17. Tributación del Sector Transporte en Argentina

    OpenAIRE

    Ernesto Rezk

    2004-01-01

    El objetivo general es examinar la carga tributaria efectiva sobre los servicios y las inversiones en infraestructura en los sectores de actividad del Transporte de Carga Terrestre (por camión) y Aéreo en la Argentina.

  18. The heavy water production plant at Arroyito, Argentina

    International Nuclear Information System (INIS)

    Ecabert, R.

    1984-01-01

    The author describes the construction of an industrial heavy water production plant (Planta Industrial de Agua Pesada, PIAP) in Argentina. The heavy water enrichment is based on a hydrogen/ammonia isotope exchange. (Auth.)

  19. Urban agriculture: Rosario, Argentina reaps the benefits | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2010-10-06

    Oct 6, 2010 ... Urban agriculture: Rosario, Argentina reaps the benefits ... Urban agriculture has become a permanent part of the city's fabric, ... The Global Roundtable of Chief Economists highlights global trends and best practices to help ...

  20. All projects related to Argentina | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Program: Governance and Justice ... Region: Argentina, Brazil, Chile, Costa Rica, Paraguay, Uruguay ... Program: Canada-Israel Health Research Program ... and Twitter are having a direct bearing on social inclusion and opportunity in many ...

  1. Record of Diaphorina citri (Hemiptera: Psyllidae) in North West Argentina

    OpenAIRE

    Augier, Lucrecia; Gastaminza, Gerardo; Lizondo, Marcelo; Argañaraz, Manuel; Willink, Eduardo

    2006-01-01

    Se amplía la distribución de Diaphorina citri Kuwayama (Hemiptera: Psyllidae) para el Noroeste Argentino.The distribution of Diaphorina citri Kuwayama (Hemiptera: Psyllidae) is expanded to North West Argentina.

  2. All projects related to argentina | IDRC - International Development ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Program: Governance and Justice ... Region: Argentina, Brazil, Chile, Costa Rica, Paraguay, Uruguay ... Program: Food, Environment, and Health ... and Twitter are having a direct bearing on social inclusion and opportunity in many spheres of ...

  3. The regulatory control of radioactive sources in Argentina

    International Nuclear Information System (INIS)

    Rojkind, Roberto Hector

    1997-01-01

    Argentina has been conducting nuclear activities for more than forty years, and as early as in 1956 established a Regulatory Authority. Procedures for compliance monitoring and enforcement have been in use in the regulatory control of radioactive sources, and regulatory standards and regulations had been set in Argentina, before the accident in Goiania. The conclusions drawn from that accident encouraged in Argentina the improvement of some regulatory procedures and helped to enhance the quality of the regulatory process. Therefore, the effectiveness of the control of spent radioactive sources has gradually increased, and enforcement actions to prevent radioactive sources ending up in the public domain improved. Some lessons learned in Argentina from the accident in Goiania and the main characteristics of an effective enforcement program helpful to prevent radiological accidents in industrial, medical, research and teaching uses of radioactive sources are presented. (author)

  4. Solar Pump

    Science.gov (United States)

    Pique, Charles

    1987-01-01

    Proposed pump moves liquid by action of bubbles formed by heat of sun. Tube of liquid having boiling point of 100 to 200 degrees F placed at focal axis of cylindrical reflector. Concentrated sunlight boils liquid at focus, and bubbles of vapor rise in tube, carrying liquid along with them. Pressure difference in hot tube sufficient to produce flow in large loop. Used with conventional flat solar heating panel in completely solar-powered heat-storage system.

  5. Solar Schematic

    Science.gov (United States)

    1979-01-01

    The home shown at right is specially designed to accommodate solar heating units; it has roof planes in four directions, allowing placement of solar collectors for best exposure to the sun. Plans (bottom) and complete working blueprints for the solar-heated house are being marketed by Home Building Plan Service, Portland, Oregon. The company also offers an inexpensive schematic (center) showing how a homeowner only moderately skilled in the use of tools can build his own solar energy system, applicable to new or existing structures. The schematic is based upon the design of a low-cost solar home heating system built and tested by NASA's Langley Research Center; used to supplement a warm-air heating system, it can save the homeowner about 40 percent of his annual heating bill for a modest investment in materials and components. Home Building Plan Service saved considerable research time by obtaining a NASA technical report which details the Langley work. The resulting schematic includes construction plans and simplified explanations of solar heat collection, collectors and other components, passive heat factors, domestic hot water supply and how to work with local heating engineers.

  6. Aphanes arvensis (Rosaceae) en el extremo nordeste de la Argentina

    OpenAIRE

    Gustavo Hildt; Héctor A. Keller

    2017-01-01

    Se menciona por primera vez para el nordeste argentino a una hierba adventicia en el nuevomundo. La especie es ilustrada mediante fotografías Fil: Hildt, Gustavo. Universidad Nacional de Misiones; Argentina Fil: Keller, Hector Alejandro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Nordeste. Instituto de Botánica del Nordeste (i); Argentina

  7. Allamanda schottii (Apocynaceae: nueva cita para la Flora Argentina

    Directory of Open Access Journals (Sweden)

    Julio A. Hurrell

    2013-01-01

    Full Text Available En este trabajo Allamanda schottii Pohl (Apocynaceae es documentada como nueva cita genérica y específica para la Flora Argentina. La especie fue hallada en la ribera del Paraná, en el norte de la provincia de Corrientes, Argentina. Se incluye su sinonimia, descripción, comentarios sobre su distribución, hábitat, fenología, biología reproductiva, nombres vulgares, usos y observaciones.

  8. CROSSROADS BETWEEN EDUCATION POLICIES AND INDIGENOUS LANGUAGES MAINTENANCE IN ARGENTINA

    Directory of Open Access Journals (Sweden)

    Ana Carolina Hecht

    2010-06-01

    Full Text Available Process of language shift is explained by many researchers since linguistic and anthropological perspectives. This area focuses on the correlations between social processes and changes in systems of use of a language. This article aims to address these issues. In particular, we analyze the links between educational-linguistic policy and the maintenance of the languages spoken in Argentina. In doing so, we explore this field taking into account the linguistic and educational policies implemented about indigenous languages in Argentina.

  9. Argentina's experience with parallel exchange markets: 1981-1990

    OpenAIRE

    Steven B. Kamin

    1991-01-01

    This paper surveys the development and operation of the parallel exchange market in Argentina during the 1980s, and evaluates its impact upon macroeconomic performance and policy. The historical evolution of Argentina's exchange market policies is reviewed in order to understand the government's motives for imposing exchange controls. The parallel exchange market engendered by these controls is then analyzed, and econometric methods are used to evaluate the behavior of the parallel exchange r...

  10. Sectorial analysis of nanotechnology companies in Argentina

    Science.gov (United States)

    Foladori, Guillermo; Lau, Edgar Záyago; Carroza, Tomás; Appelbaum, Richard P.; Villa, Liliana; Robles-Belmont, Eduardo

    2017-06-01

    In this paper, we identify 37 companies that produce nano-enabled products in Argentina. We locate the products of these firms in terms of both their economic sector and position in a value chain. The research was done through a four-step methodology. Firstly, an inventory of firms was created. Secondly, the firms were classified by their economic sector, following the United Nations economic classification. Thirdly, the firms were located within a simple nanotechnology value chain. Finally, the products were classified according to their final destination, being either means of production or final consumer products. The results show that healthcare, cosmetics, and medicine is the most represented sector along the value chain, followed by electronics.

  11. Adequacy features of Nucleoelectrica Argentina Safety Management

    Energy Technology Data Exchange (ETDEWEB)

    Rapoport, H [Nucleoelectrica Argentina S.A., Buenso Aires (Argentina)

    1997-12-01

    The Argentine Nuclear Power Plants (NPP) ATUCHA I (357 Mw, SIEMENS) and EMBALSE (648 Mw, CANDU), both of PHWR type, were owned and operated until August 94 by the Comision Nacional de Energia Atomica (CNEA). Until that date, CNEA, the national agency for nuclear R and D, concentrated three activities or roles: Research, Nuclear Regulations and NPP Operation. Since August 1994 NPP`s are owned and operated by a state electrical company (Nucleoelectrica Argentina S.A.) the nuclear utility supplying 15% of the national electrical generation demand. NASA is going to be privatized according to a recent national law regulating nuclear activities. The transition from a research agency to a commercial company requires the introduction of changes in the management of activities. Mention of these changes is limited to those relating to Safety.

  12. Evaluation of training activities in Argentina

    International Nuclear Information System (INIS)

    Sanda, Alejandro D.

    2003-01-01

    In Argentina, there are two NPPs in operation and one under construction. The personnel at the first NPP built, Atucha-1, were originally trained by the German experts, afterwards there were no serious problems while the plant was still new, but problems arose later, The training program organized locally was found to be 'frozen'. That is why experiences in evaluation of the training effectiveness will be of great help. The global training effectiveness are believed to be achieved if the following goals are reached: less number of non-planned shutdowns due to human errors; less number of correctives works in the equipment, when preventive tasks were performed on them; less dose to perform equipment maintenance; less time to perform equipment maintenance; shorter outages, with less dose; less number of personnel accidents; etc

  13. Researching quality of life in Argentina

    Directory of Open Access Journals (Sweden)

    Graciela Tonón

    2015-09-01

    Full Text Available The study of quality of life considers at the same time objective and subjective circumstances of people life. In 1995 was created the International Society for Quality of Life Studies (ISQOLS whose purposes are to promote and encourage research in the field of quality-of-life studies and provide an organization through which all academic and professional researchers interested in QOL studies may coordinate their efforts to advance the field of QOL studies within various disciplines. In the case of Argentina since 2004, the Facultad de Ciencias Sociales, Universidad Nacional de Lomas de Zamora has organized the Research Program in Quality of life to develop different kind of projects about quality of life in different fields, trying to be considered by national institutions that decide public policies. 

  14. Health in Argentina under the Military Junta.

    Science.gov (United States)

    Bermann, S; Escudero, J C

    1978-01-01

    The socioeconomic policies of Argentina's Military Junta, in power since March 1976, have led to a sharp impoverishment of the vast majority of the population. In the health sector, facilities which previously were public are being transferred to the private sector, and public hospitals formerly providing free services to the population now charge patients for the care received. As a necessary counterpart to these unpopular measures, a regime of terror has been waged against members of the health team--both those politically active and those considered potentially subversive, particularly the psychiatrists and workers in community health. Differences between the Argentinian situation and previous European fascist patterns are noted, and the possibility of use of the "Argentinian model" in other capitalist countries in crisis is discussed.

  15. Virtual Archaeology in an argentina colonial estancia

    Directory of Open Access Journals (Sweden)

    Florencia Vázquez

    2014-05-01

    Full Text Available This is a first approach to the application of virtual reconstruction techniques of a colonial house. In Argentina it is still uncommon to perform 3D modeling of archaeological sites and especially in historical archeology. As a first step, we used the Google SketchUp to model the country house located on the banks of the Río de la Plata (Buenos Aires. It has historical significance because it belonged to a Spanish councilman, housed hundreds of slaves and was the place where stayed the troops that carried out the Second British Invasion of Buenos Aires. In this case, the 3D modeling was useful for evaluating the future excavationa and activities of preservation of cultural heritage.

  16. MEMORIA Y CULTURA OBRERA EN ARGENTINA

    Directory of Open Access Journals (Sweden)

    Universidad de Buenos

    2010-06-01

    Full Text Available Esta ponencia tiene como objetivo rastrear la existencia de una cultura obrera izquierdista en el interior de la Argentina ha partir de testimonios de obreros, intelectuales y de militantes de izquierda. De esta manera, la Historia Oral como metodología de investigación nos proporcionará una herramienta indispensable para echar luz sobre este tema que ha sido hasta el momento descuidado. Para tal efecto, nos centraremos en ciudades del interior la provincia de Córdoba en la década de1930. A partir de los testimonios recogidos se analizarán los problemas de la memoria de sus protagonistas y su resignificación desde el presente, las nociones que tienen los protagonistas sobre la política, la cultura y la militancia sobre el período estudiado.

  17. Nuclear fuel supply view in Argentina

    International Nuclear Information System (INIS)

    Cirimello, R.O.

    1997-01-01

    The Argentine Atomic Energy Commission promoted and participated in a unique achievement in the R and D system in Argentina: the integration of science technology and production based on a central core of knowledge for the control and management of the nuclear fuel cycle technology. CONUAR SA, as a fuel manufacturer, FAE SA, the manufacturer of Zircaloy tubes, CNEA and now DIOXITEC SA producer of Uranium Dioxide, have been supply, in the last ten years, the amount of products required for about 1300 Tn of equivalent U content in fuels. The most promising changes for the fuel cycle economy is the Slight Enriched Uranium project which begun in Atucha I reactor. In 1997 seventy five fuel assemblies, equivalent to 900 Candu fuel bundles, will complete its irradiation. (author)

  18. OSMUNDACEAE EN ARGENTINA, PARAGUAY Y URUGUAY

    Directory of Open Access Journals (Sweden)

    Marcelo D. Arana

    2015-01-01

    Full Text Available En este estudio se actualiza la taxonomía y distribución de las Osmundaceae, familia de helechos que habitan bosques y humedales subtropicales de la Argentina, Paraguay y Uruguay. Actualmente la familia comprende cuatro géneros, dos de ellos, con una especie cada uno, estan presentes en la región estudiada. Se acepta Osmunda spectabilis como una especie válida, diferente de O. regalis , la que no se encuentra presente en el área de estudio. Se reconoce a nivel de género a Osmundastrum con una única especie O. cinnamomeum var. cinnamomeum . Se incluyen una clave para los géneros, descripciones, la sinonimia relevante para América del Sur, distribuciones e ilustraciones de las especies. Se lectotipifica a Osmunda imbricata, Osmunda palustris y Osmunda spectabilis var. brasiliensis .

  19. MEDIOS, PROTESTA Y EXPERIENCIA EN ARGENTINA

    Directory of Open Access Journals (Sweden)

    María Graciela Rodríguez

    2004-01-01

    Full Text Available El objetivo de este artículo es dar a conocer algunas hipótesis acerca de los modos como se construyen los relatos sobre las protestas populares en Argentina. Para ello expongo los resultados de una etapa de la investigación en la cual se han confrontado el análisis discursivo de textos de medios de comunicación dedicados a la protesta con un corpus de entrevistas a los protagonistas de estas acciones. Los resultados de dicha confrontación muestran la existencia de dos formas distintas de operar sobre el devenir histórico relacionadas no sólo con la distintiva puntuación temporal de la secuencia de los hechos, sino también con los procesos de enmarcado valorativo y su colocación en una serie histórica.

  20. Adequacy features of Nucleoelectrica Argentina Safety Management

    International Nuclear Information System (INIS)

    Rapoport, H.

    1997-01-01

    The Argentine Nuclear Power Plants (NPP) ATUCHA I (357 Mw, SIEMENS) and EMBALSE (648 Mw, CANDU), both of PHWR type, were owned and operated until August 94 by the Comision Nacional de Energia Atomica (CNEA). Until that date, CNEA, the national agency for nuclear R and D, concentrated three activities or roles: Research, Nuclear Regulations and NPP Operation. Since August 1994 NPP's are owned and operated by a state electrical company (Nucleoelectrica Argentina S.A.) the nuclear utility supplying 15% of the national electrical generation demand. NASA is going to be privatized according to a recent national law regulating nuclear activities. The transition from a research agency to a commercial company requires the introduction of changes in the management of activities. Mention of these changes is limited to those relating to Safety

  1. The fourth nuclear power plant in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Nogarin, Mauro

    2017-01-15

    Since 2006 the nuclear sector in Argentina has aimed at recovering and strengthening its capabilities and facilities. Part of the challenge posed by this revival has been to also accompany the development of activities with a higher level of responsibility for safety and the environment. Among the strategic decisions taken in recent years, one main highlight is the construction of the nuclear power plant CAREM25 entirely with Argentine technology and design under the responsibility of the National Atomic Energy Commission. On February 4, 2015, the Ministry of Federal Planning and the National Energy Administration (NEA) signed the agreement for cooperation and construction of pressurized water reactor (PWR) with ACP-1000 technology, developed in the Peoples Republic of China.

  2. About the Triple A. Argentina 1973 - 1976

    OpenAIRE

    Rostica, Julieta

    2011-01-01

    El 25 de mayo de 1973 el peronismo volvió a gobernar la Argentina tras aproximadamente dos décadas de proscripción y persecución política. Tras su establecimiento, ciertos crímenes comenzaron a ser firmados con “AAA”. La Triple A tuvo la particularidad de desaparecer con el golpe de Estado del 24 de marzo de 1976. ¿Por qué esta organización sólo pudo existir en una democracia erigida en medio de dos dictaduras militares? ¿Por qué existió durante el tan anhelado gobierno peronista? El artículo...

  3. Argentina: Camino del desendeudamiento. 1991-2011

    Directory of Open Access Journals (Sweden)

    Pablo Nemiña

    2012-05-01

    Full Text Available El presente artículo analiza las transformaciones de la política financiera en la Argentina durante el período 1991-2011. Para ello, se estudian las principales acciones del Estado orientadas a enfrentar la problemática de la deuda pública y el financiamiento, así como las relaciones establecidas con el sector financiero y el FMI. La evolución de la política financiera argentina resalta uno de los contrapuntos más sobresalientes entre el período de la convertibilidad vigente hasta 2001 y la etapa posterior. El régimen de convertibilidad implicó el sostenimiento de una moneda nacional sobrevaluada, la cual determinó el progresivo incremento de la deuda pública y alentó el proceso de financiarización de la economía. En cambio, el régimen de la posconvertibilidad, apoyado en el mantenimiento de un tipo de cambio competitivo junto al superávit fiscal y comercial, ha contribuido a promover la actividad productiva por sobre la financiera. Esto, junto a la reestructuración de la deuda, ha permitido sostener un proceso de reducción gradual del endeudamiento público en términos relativos, liberando recursos para fomentar el mercado interno. Consecuentemente, con posterioridad a 2002 se observa una erosión de la capacidad de condicionamiento estructural sobre la dinámica del crecimiento de los acreedores, el FMI, y el sector financiero en general, en simultáneo con la obtención de mayores grados de autonomía financiera por parte del Gobierno Nacional. Finalmente, se analizan los desafíos que impone la crisis internacional a la continuación de este sendero.

  4. 222Rn Measurements in Dwellings of Argentina

    International Nuclear Information System (INIS)

    Gnoni, G.; Canoba, A.; Czerniczyniec, M.

    2011-01-01

    Radon gas ( 222 Rn) is responsible of about fifty per cent of the world population dose due to natural sources, being the most important pathway the inhalation of radon progeny, specially indoors. Radon concentration has been measured in dwellings at different locations in Argentina. The places selected to be evaluated are representative of the different geologic zones of the country. Near 3000 dwellings have been analyzed since 1983 up today. The measuring methods used in this case were track etched detectors, electrets and detectors based on activated charcoal adsorption. Two different methods with track etched detectors were used: a simple one, which determines only the average radon concentration, and a second one that measures both radon concentration and the equilibrium factor (F) between radon and its daughters. The last one is a method that uses two Makrofol passive track detectors in the same device. The average radon concentration value obtained from all the dwellings evaluated was 44.2 Bq.m-3. The annual effective dose calculated from this average concentration, using a dosimetric factor of 25 μSv.a- 1. (Bq.m -3 ) -1 , which assumes an equilibrium factor of 0.4, was 1.11 mSv. The average value obtained from the 222 dwellings evaluated by the second method was 49.3 Bq.m -3 and 0,37 the equilibrium factor, resulting the annual effective dose estimated 1,44 mSv. The measured equilibrium factor of 0,37 allows us to verify the assumed equilibrium factor of 0,4. Finally, radon levels in dwellings of Argentina are within the acceptable values for population, not being necessary to implement remedial actions, except in isolate cases that are still under study. (authors)

  5. The multiple applications of the nuclear techniques in Argentina; Las multiples aplicaciones de la tecnologia nuclear en Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Manzini, Alberto C [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Programa de Radioisotopos y Aplicaciones

    2001-07-01

    A review is given of the use of nuclear technology in Argentina, especially in the field of the production of radioisotopes and radiopharmaceuticals, nuclear medicine, and industrial applications. The applications of ionizing radiation are also reviewed.

  6. Solar India - 82: national solar energy convention

    Energy Technology Data Exchange (ETDEWEB)

    1982-01-01

    This document is the proceedings of the Solar India - 82 conference, which was held 17-19 December 1982. The papers are organized into functional groupings which include: (1) solar radiation, (2) flat plate solar collectors and solar water heaters, (3) solar concentrators, (4) solar air heaters and dryers, (5) solar ponds and energy storage, (6) solar cookers, (7) solar stills, (8) selective coatings, (9) photovoltaics, (10) space heating and cooling, (11) bio-energy, and (12) miscellaneous papers. The vast majority of the papers describe work carried out in India, the vast majority of the papers also contain relatively readable abstracts.

  7. Solar Features - Solar Flares - Patrol

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The H-alpha Flare Patrol identifies time periods each day when the sun is being continuously monitored by select ground-based solar observatories.

  8. Solar Features - Solar Flares - SIDS

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — A Sudden Ionospheric Disturbance (SID) is any of several radio propagation anomalies due to ionospheric changes resulting from solar or geophysical events.

  9. Solar Energy Innovation Network | Solar Research | NREL

    Science.gov (United States)

    Energy Innovation Network Solar Energy Innovation Network The Solar Energy Innovation Network grid. Text version The Solar Energy Innovation Network is a collaborative research effort administered (DOE) Solar Energy Technologies Office to develop and demonstrate new ways for solar energy to improve

  10. Solar energy. [New Zealand

    Energy Technology Data Exchange (ETDEWEB)

    Benseman, R.

    1977-10-15

    The potential for solar space heating and solar water heating in New Zealand is discussed. Available solar energy in New Zealand is indicated, and the economics of solar space and water heating is considered. (WHK)

  11. Solarization soil

    International Nuclear Information System (INIS)

    Abou Ghraibe, W.

    1995-01-01

    Solar energy could be used in pest control, in soil sterilization technology. The technique consists of covering humid soils by plastic films steadily fixed to the soil. Timing must be in summer during 4-8 weeks, where soil temperature increases to degrees high enough to control pests or to produce biological and chemical changes. The technique could be applied on many pests soil, mainly fungi, bacteria, nematods, weeds and pest insects. The technique could be used in greenhouses as well as in plastic film covers or in orchards where plastic films present double benefits: soil sterilization and production of black mulch. Mechanism of soil solarization is explained. Results show that soil solarization can be used in pest control after fruit crops cultivation and could be a method for an integrated pest control. 9 refs

  12. Solar unit

    Energy Technology Data Exchange (ETDEWEB)

    Sukhanov, A M; Trushevskiy, S N; Tveryanovich, E V

    1982-01-01

    A solar unit is proposed which contains an inclined solar collector with supply and outlet pipelines, the first of which is connected to the source of a heat carrier, while the second is connected through the valve to the tank for collecting heated heat carrier equipped with a device for recovery. In order to improve the effectiveness of heating the heat carrier, it additionally contains a concentrator of solar radiation and a device for maintaining a level of the heat carrier in the collector in the zone of the focal spot of the concentrator, while the heat pipeline is connected to the source of the heat carrier with the help of a device for maintaining the level of the heat carrier.

  13. A Argentina depois da conversibilidade: um caso de novo-desenvolvimentismo?

    Directory of Open Access Journals (Sweden)

    André Moreira Cunha

    2009-03-01

    Full Text Available This paper analyses the economic recovery in post-Convertibility Argentina. We try to identify if there are evidences to support the suggestion that Argentina could be an example of the so-called "new developmentalism".

  14. Solar cells

    International Nuclear Information System (INIS)

    1980-01-01

    A method of producing solar cells is described which consists of producing a substantially monocrystalline tubular body of silicon or other suitable semiconductor material, treating this body to form an annular rectifying junction and then cutting it longitudinally to form a number of nearly flat ribbons from which the solar cells are fabricated. The P=N rectifying junction produced by the formation of silicon dioxide on the layers at the inner and outer surfaces of the body can be formed by ion-implantation or diffusion. (U.K.)

  15. Solar neutrinos

    International Nuclear Information System (INIS)

    Phillips, R.J.N.

    1987-09-01

    The problem with solar neutrinos is that there seem to be too few of them, at least near the top end of the spectrum, since the 37 Cl detector finds only about 35% of the standard predicted flux. Various kinds of explanation have been offered: (a) the standard solar model is wrong, (b) neutrinos decay, (c) neutrinos have magnetic moments, (d) neutrinos oscillate. The paper surveys developments in each of these areas, especially the possible enhancement of neutrino oscillations by matter effects and adiabatic level crossing. The prospects for further independent experiments are also discussed. (author)

  16. Concentrating Solar Power Projects - Nevada Solar One | Concentrating Solar

    Science.gov (United States)

    Power | NREL Nevada Solar One This page provides information on Nevada Solar One, a concentrating solar power (CSP) project, with data organized by background, participants, and power plant configuration. Acciona Energy's Nevada Solar One is the third largest CSP plant in the world and the first plant

  17. Concentrating Solar Power Projects - Khi Solar One | Concentrating Solar

    Science.gov (United States)

    Power | NREL Khi Solar One This page provides information on Khi Solar One, a concentrating solar power (CSP) project, with data organized by background, parcipants and power plant configuration . Status Date: February 8, 2016 Project Overview Project Name: Khi Solar One Country: South Africa Location

  18. The culture of milk in Argentina

    Directory of Open Access Journals (Sweden)

    Patricia Aguirre

    2003-09-01

    Full Text Available This paper analyses the culture of milk and it includes both the micro social aspects of household consumption and the economic macro aspects related to milk production and their market and the welfare distribution in public policies against poverty. The hypothesis is that in Argentina there is a real culture of milk, which gives meaning to consumption, and marks the different income groups within society, as well as their gender and age. But since approximately 20 years ago, in accordance with the restructuring of the dairy industrial complex, that culture of milk has been changing, and its most outstanding features are the following: abandonment of milk as the emblematic food for children and its extension to the adult “formal” consumption; milk is no longer the knowledge of women and becomes the knowledge of experts; increase in milk consumption (dairy products in general as food gets feminine, infantile, medicated, globalised and segmented.Este artículo sobre la cultura de la leche analiza los aspectos microsociales del consumo en el hogar y los aspectos macro de la economía que hacen a la industria lactea y al mercado junto a la distribución asistencial del estado en los programas contra la pobreza. La hipótesis es que en Argentina existe una verdadera cultura de la leche, que da sentido al consumo, marcando con el alimento los diferentes sectores de ingreso de la sociedad, los géneros y las edades. Pero desde hace aproximadamente 20 años, en consonancia con la reconversión del complejo industrial lácteo, esta cultura de la leche esta cambiando, se describen sus aspectos mas salientes tales como : el abandono de la leche como alimento emblemático de los niños y su extensión al consumo “formal” adulto ; deja de ser un alimento rutinario cuyo saber usar residía en las mujeres y su uso pase a ser cosa de especialistas ; a medida se feminiza, infantiliza, medicaliza, globaliza y segmenta la alimentación en general

  19. Solar Energy and You.

    Science.gov (United States)

    Conservation and Renewable Energy Inquiry and Referral Service (DOE), Silver Spring, MD.

    This booklet provides an introduction to solar energy by discussing: (1) how a home is heated; (2) how solar energy can help in the heating process; (3) the characteristics of passive solar houses; (4) the characteristics of active solar houses; (5) how solar heat is stored; and (6) other uses of solar energy. Also provided are 10 questions to…

  20. La madurez del fruto y el secado del cáliz influyen en el comportamiento poscosecha de la uchuva, almacenada a 12 °C (Physalis peruviana L.

    Directory of Open Access Journals (Sweden)

    Novoa Rafael H.

    2006-06-01

    C y 24 oC durante 6 h. Se determino la intensidad respiratoria por cromatografia de gases y el contenido de acidos organicos y azucares por cromatografía liquida de alto desempeno. Los resultados mostraron que la uchuva es un fruto climaterico, que presenta el maximo de respiracion a los 12 d de almacenamien to. Los tratamientos con secado del caliz a 24 oC fueron mas eficientes, ya que el fruto respiro menos, comparado con las uchuvas cuyo caliz fue secado a 18 oC. Entre los acidos organicos evaluados, el acido citrico resulto predominante en  el fruto, seguido por los acidos malico, ascorbico,  tartarico y oxalico, respectivamente. La perdida de acido as corbico en el fruto fue total despues de12 d de almacenamiento. Los azucares predominantes en la uchuva fueron, en su orden, sacarosa, glucosa y fructosa. Frutos cosechados en grado de madurez (GM 4 con secado del caliz a 24 oC y aquellos en GM 5 y secados a 18 °C conservaron mejor la concentración de sacarosa. Se presento Botrytis cinerea en frutos con secado del caliz a 18 oC.

  1. Valor nutritivo del heno de maní forrajero deshidratado en un secador solar

    Directory of Open Access Journals (Sweden)

    Adrián Filomena Sancho

    2007-01-01

    Full Text Available Se evaluó la henificación, en un secador solar, de Arachis sp. cosechado a 180 días de rebrote. Los tratamientos fueron: camas de material de 15 y 30 cm de espesor; volteos del material (sin volteos, 1 volteo por día y 1 volteo cada 2 días; y 6 y 9 días de secado. La temperatura promedio dentro del secador fue 13,4±7,7ºC mayor que la externa y la humedad relativa 17,4±12,75% menor que la externa. La MS (72,52±10,19% varió por los efectos principales y la interacción espesor de la cama por volteo (p<0,0001. El contenido de proteína (15,67±0,68% MS, no fue alterado por los tratamientos ni por sus interacciones. Para la FDN y la FDA, las 3 variables fueron significativas con una concentración promedio de 52,23±3,99% MS y 42,41±2,95% MS, respectivamente. El N-FDA fue afectado por las variables en estudio; en promedio se obtuvo 0,175±0,03% de N-FDA, lo que equivale al 6,97±0,99% de N/N-total. Así, los secadores solares son una alternativa de bajo costo para la producción de un heno que supera la calidad del producido a base de gramíneas.

  2. Sistema Solar

    OpenAIRE

    Federación de Asociaciones de Astronomía Cielo de Comellas

    2011-01-01

    Lección sobre el Sistema Solar. Curso de Astronomía Básica, segunda edición, impartido por los miembros de la Federación de Asociaciones de Astronomía Cielo de Comellas. Casa de la Ciencia, sábados, del 24 de septiembre al 22 de octubre de 2011

  3. Solar Neutrinos

    Directory of Open Access Journals (Sweden)

    V. Antonelli

    2013-01-01

    relevant indications on the fundamental interactions among particles. After reviewing the striking results of the last two decades, which were determinant to solve the long standing solar neutrino puzzle and refine the Standard Solar Model, we focus our attention on the more recent results in this field and on the experiments presently running or planned for the near future. The main focus at the moment is to improve the knowledge of the mass and mixing pattern and especially to study in detail the lowest energy part of the spectrum, which represents most of the solar neutrino spectrum but is still a partially unexplored realm. We discuss this research project and the way in which present and future experiments could contribute to make the theoretical framework more complete and stable, understanding the origin of some “anomalies” that seem to emerge from the data and contributing to answer some present questions, like the exact mechanism of the vacuum to matter transition and the solution of the so-called solar metallicity problem.

  4. Solar satellites

    Energy Technology Data Exchange (ETDEWEB)

    Poher, C.

    1982-01-01

    A reference system design, projected costs, and the functional concepts of a satellite solar power system (SSPS) for converting sunlight falling on solar panels of a satellite in GEO to a multi-GW beam which could be received by a rectenna on earth are outlined. Electricity transmission by microwaves has been demonstrated, and a reference design system for supplying 5 GW dc to earth was devised. The system will use either monocrystalline Si or concentrator GaAs solar cells for energy collection in GEO. Development is still needed to improve the lifespan of the cells. Currently, the cell performance degrades 50 percent in efficiency after 7-8 yr in space. Each SSPS satellite would weigh either 34,000 tons (Si) or 51,000 tons (GaAs), thereby requiring the fabrication of a heavy lift launch vehicle or a single-stage-to-orbit transport in order to minimize launch costs. Costs for the solar panels have been estimated at $500/kW using the GaAs technology, with transport costs for materials to GEO being $40/kg.

  5. Solar Neutrinos

    Indian Academy of Sciences (India)

    7,81. The Chlorine experiment, located in the Homestake Gold Mine in Lead, South Dakota, was the first solar neutrino experiment to be set up. A tank of. 105 gallons of perchloroethylene in which the electron neu- trino reacts with chlorine to ...

  6. Solar satellites

    Science.gov (United States)

    Poher, C.

    A reference system design, projected costs, and the functional concepts of a satellite solar power system (SSPS) for converting sunlight falling on solar panels of a satellite in GEO to a multi-GW beam which could be received by a rectenna on earth are outlined. Electricity transmission by microwaves has been demonstrated, and a reference design system for supplying 5 GW dc to earth was devised. The system will use either monocrystalline Si or concentrator GaAs solar cells for energy collection in GEO. Development is still needed to improve the lifespan of the cells. Currently, the cell performance degrades 50 percent in efficiency after 7-8 yr in space. Each SSPS satellite would weigh either 34,000 tons (Si) or 51,000 tons (GaAs), thereby requiring the fabrication of a heavy lift launch vehicle or a single-stage-to-orbit transport in order to minimize launch costs. Costs for the solar panels have been estimated at $500/kW using the GaAs technology, with transport costs for materials to GEO being $40/kg.

  7. Cooperation on Water management issues, Argentina : Project in the framework of Bilateral Cooperation between Argentina and the Netherlands : Case studies on water management issues in Argentina

    NARCIS (Netherlands)

    Querner, E.P.; Morabito, J.A.; Rebori, G.

    2007-01-01

    In Argentina parts of the country have problems encountered from too much water or suffer serious water shortages. The Humid Pampas encounter an increased rainfall since the 1970’s. In Mendoza Province water resources are limited and all the water from the rivers is used for agriculture, drinking

  8. 76 FR 80870 - Notice of Determination of Pest-Free Areas in Mendoza Province, Argentina

    Science.gov (United States)

    2011-12-27

    ... ;D=APHIS-2010-0032. The first commenter acknowledged Argentina's history of successful Medfly control...] Notice of Determination of Pest-Free Areas in Mendoza Province, Argentina AGENCY: Animal and Plant Health... Southern and Central Oases in the southern half of Mendoza Province in Argentina as pest-free areas for...

  9. 76 FR 51934 - Determination of Pest-Free Areas in Mendoza Province, Argentina; Request for Comments

    Science.gov (United States)

    2011-08-19

    ... acknowledged Argentina's history of successful Medfly control efforts, but stated that APHIS should not relax...] Determination of Pest-Free Areas in Mendoza Province, Argentina; Request for Comments AGENCY: Animal and Plant... received a request from the Government of Argentina to recognize additional areas as pest- free areas for...

  10. Economy-wide impacts of biofuels in Argentina

    International Nuclear Information System (INIS)

    Timilsina, Govinda R.; Chisari, Omar O.; Romero, Carlos A.

    2013-01-01

    Argentina is one of the world's largest biodiesel producers and the largest exporter, using soybeans as feedstock. Using a computable general equilibrium model that explicitly represents the biofuel industry, this study carries out several simulations on two sets of issues: (i) international markets for biofuel and feedstock, such as an increase in prices of soybean, soybean oil, and biodiesel, and (ii) domestic policies related to biofuels, such as an introduction of biofuel mandates. Both sets of issues can have important consequences to the Argentinean economy. The simulations indicate that increases in international prices of biofuels and feedstocks would increase Argentina's gross domestic product and social welfare. Increases in international prices of ethanol and corn also can benefit Argentina, but to a lesser extent. The domestic mandates for biofuels, however, would cause small losses in economic output and social welfare because they divert part of biodiesel and feedstock from exports to lower-return domestic consumption. An increase in the export tax on either feedstock or biodiesel also would lead to a reduction in gross domestic product and social welfare, although government revenue would rise. - Highlights: ► Argentina is one of the largest biodiesel producer and exporter using soybeans. ► Economy-wide impacts are assessed using a CGE model for Argentina. ► Policies simulated are feedstock and biodiesel price change, and domestic mandates. ► Increases in international prices of biofuels and feedstock benefit the country. ► Domestic mandates for biofuels cause small losses in economic output

  11. Horizontalidad, autogestión y protagonismo en Argentina

    Directory of Open Access Journals (Sweden)

    Marina Sitrin

    2010-02-01

    Full Text Available Este artículo trata los movimientos sociales autónomos que surgieron después de la crisis económica y la posterior rebelión popular en Argentina en diciembre de 2001. Los movimientos autónomos en la Argentina, como tantos movimientos en el mundo de hoy, son movimientos basados en la creación de nuevas relaciones sociales y comunidades ahora, al mismo tiempo que proyectan nuevas sociedadesy las relaciones en y para el futuro. Son movimientos con una concepción diferente del tiempo y el espacio. Son movimientos queentienden lo individual y lo colectivo como vinculados entre sí. Hay mucho en común entre la experiencia en la Argentina y las prácticas eideas anarquistas. Eso no significa que los que están creando nuevas relaciones y comunidades en la Argentina sean anarquistas. Lo que este artículo intenta hacer es basarse en las experiencias de los movimientos sociales argentinos para iniciar una reflexión sobre lasprácticas e ideas que los anarquistas pueden prestar a los distintos movimientos y comunidades autónomas; y, a su vez, sobre lo que los movimientos autónomos en la Argentina puede dar a las ideas y prácticas anarquistas.

  12. Discussion of oil pollution in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    1978-06-01

    Oil pollution in Argentina, at the port of Comodora Rivadavia showed signs of long-term oil pollution of a nature which would not be tolerated in relation to the exploitation of North Sea oil. The field is operated by Yacimientos Petroliferos Fiscales (Argentine), produces 70,000 bbl/day of oil from onshore and offshore wells, and has been in operation since 1907. A very marked ''tideline'' of bituminous oil residues contaminates the harbor installations and completely covers the pebbles, boulders, and rocks in the intertidal region. This material is of a considerable thickness and has completely obliterated any form of littoral marine life in these habitats. The sandy beach does not show signs of accumulative oil, and it is used as an important recreational area. Since seriously oiled seabirds can be seen, it is surprising that Patagonian crested ducks, king cormorants, and kelp gulls occur in large numbers but show little sign of oil contamination. The Magellan penguin, which is much less abundant locally, may have been much more vulnerable to the oil.

  13. El MERCOSUR y la Realidad Argentina 2006

    Directory of Open Access Journals (Sweden)

    Luis Felipe Agramunt

    2006-12-01

    Full Text Available Argentina está creciendo fuertemente pero no logra trasladar similar tendencia a sus relaciones comerciales con el exterior. Su competitividad internacional, medida a partir de las capacidades de sus empresas para sostener o ganar mercados internacionales, no es similar a la de otros países del MERCOSUR y por el contrario pierde ventajas a medida que pasan los años. El proceso integrador del MERCOSUR no es causa de dicho debilitamiento sino que, por el contrario y como lo demuestra el desarrollo de otros países del bloque, puede ser un factor crítico para ayudar a mejorar la creación de comercio. Sin embargo, el bloque está sufriendo tensiones que le impiden crecer y consolidarse más y mejor a lo largo de los años. Esta situación afecta al país, ya que se le restan posibilidades de aprovechar dicha ventaja como lo supo hacer en las primeras etapas por medio del efecto de “desvío de comercio”. Los esfuerzos cotidianos de los hombres de negocios para hacer posible un MERCOSUR más fuerte y con menos tensiones, a partir de acciones continuas y permanentes, deben ser acompañados por acciones políticas en igual sentido y resolución pronta y justa de las tensiones internas

  14. Status of RERTR activities in Argentina

    International Nuclear Information System (INIS)

    Alvarez, L.; Boero, N.; Pasqualini, E.; Echenique, P.; Ruggirello, G.; Taboada, H.

    2003-01-01

    CNEA, the Atomic Energy Commission of Argentina, has defined development and fabrication activities related with the main fields of the RERTR program. This includes the qualification of high-density fuels for research reactors, the production of radioisotopes from LEU targets and the reduction of the HEU inventory. This paper continues previous presentations in past RERTR meetings and summarizes the main activities performed in these fields during 2002- 2003 and future works. The main part of the CNEA U 3 Si 2 Qualification Program will be completed within this year. The irradiation of the first fuel element was finished and the activities are mainly focused on its PIE works. Regarding the UMo field, development works to provide support for fuel plate fabrication process and to improve understanding of UMo-Al interaction are on progress. Depending on the results of the fuel plate fabrication setup, the manufacturing of full size FE for UMo qualification program could take place during 2004. A program related with the UMo monolithic fuel is also in progress. In the radioisotopes field LEU targets have replaced HEU-Al alloy targets for routine Mo-99 production since November 2002. CNEA approach to minimize the Argentine HEU inventory is also presented (author)

  15. [Insulin and diabetes control in Argentina].

    Science.gov (United States)

    Gagliardino, Juan J; Costa Gil, José E; Faingold, María C; Litwak, León; Fuente, Graciela V

    2013-01-01

    As in the rest of the world, there is a significant gap between scientific knowledge regarding diabetes mellitus and the daily practice outcome, in Argentina. Inadequate diabetes control combined with associated cardiovascular risk factors are responsible for an elevated morbid-mortality incidence and the consequent raise in the socioeconomic burden. Some of the factors leading to this situation are the late diagnosis of the disease, the clinical "inertia" (reluctance to prescribe insulin) and the poor education given to the health care team as well as the persons with diabetes. The implementation of a national diabetologic education program targeting health care providers, the persons with diabetes and their families, could contribute to optimize the appropriate insulin prescription, and consequently improve their life quality, while reducing the disease socioeconomic burden. In order to optimize the education program's strategy outcome, insulinization cabinets should be incorporated, the participation of all health systems (public health, social security and private health insurance companies), the media, health sciences, schools and the pharmaceutical industry are needed.

  16. Psychotherapy, psychoanalysis and urban poverty in Argentina.

    Science.gov (United States)

    Epele, Maria Esther

    2016-12-01

    Based on ethnographic research carried out in the Buenos Aires Metropolitan Area, this paper examines the views of social actors on the psychoanalytically-oriented psychotherapy focused on marginalized populations. From Foucault's perspective on the forms of truth-telling, the aim of this paper is to analyze, as a preliminary research report, treatments according to the native ways of speaking and listening, which dominate the description of therapeutic experiences of patients who come to the treatment without any professional intermediation. The neoliberal transformations of the past decades in Argentina changed both the landscape of the public health system and the daily lives of marginalized people. Considering such changes, this paper examines the ways in which verbal actions (speaking and listening) take place in psychotherapy and mark the course not only of treatments but also the temporal rhythms of their development, and their various levels of efficacy. Finally, the discussion focuses on how ways of speaking and listening in treatments are modeled not only by institutional dynamics but also by the characteristics these verbal activities take in everyday life under the logics of power that prevail over them.

  17. Argentina's chemical makers seek government support

    International Nuclear Information System (INIS)

    Salles, F.

    1993-01-01

    Argentina's chemical industry association, Camara de la Industria Quimica y Petroquimica (CIQYP; Buenos Aires), has started negotiations with the government aiming to stem industry-wide losses, which reached $236 million during the past 18 months. CIQYP blames the poor performance on worldwide over-supply and falling prices, which have curbed exports, and low tariffs, which have spurred imports. It is calling for higher import tariffs and export incentives. The talks will also focus on a possible bond issue that would support companies willing to restructure and modernize operations. The main factor hindering competitiveness is what CIQYP president Alejandro Achaval calls Argentinean cost, including high energy costs, high provincial and federal taxes, and high financing charges. Since 1988, the industry has cut prices by 30%, formed mergers and joint ventures, closed 11 plants and started five new ones, slashed the workforce by 27%, and engaged in the government's privatization program. Meanwhile, plans to privatize 64% of aromatics producer Petroquimica General Mosconi(PGM) were derailed when potential bidders Diamond Shamrock, Shell, and Perez Companc refused for the second time to make offers on February 2. Jorge Olazabal, planning secretary of the Ministry of Defense, says PGM will be put up for sale again by March

  18. El derecho del autor asalariado en Argentina

    Directory of Open Access Journals (Sweden)

    Augusto H. L. Arduino

    2013-11-01

    Full Text Available El autor contratado bajo relación de dependencia laboral en la Argentina no se encuentra regulado en la legislación sobre derecho de autor. La ley número 11723 no contempla la figura, y la reforma de la ley número 25.036 en su art. 2 solo hace referencia a los programas de computación realizados en virtud de un contrato laboral. No obstante, la ley de patentes número 24481 modificada por ley número 24572, ha regulado la cuestión de los derechos de explotación de patentes de invención, mediando relación contractual. Asimismo se ha regulado en ley número 20.744 lo relativo a las invenciones del trabajador. En la ley de patentes de invención se regula la situación del inventor contratado o asalariado. El derecho laboral y la propiedad intelectual en general, y en particular el derecho de autor son de naturaleza diversa y tienen regulaciones específicas con principios jurídicos propios. Por ello, se abordará cada temática desde su generalidad a fin de arribar al tratamiento del problema planteado.

  19. docentes de escuelas públicas argentinas

    Directory of Open Access Journals (Sweden)

    Ana Lía Kornblit

    2013-01-01

    Full Text Available Se analizan los datos de una encuesta a docentes de escuelas públicas de Argentina que realizaron el curso virtual dictado por el Programa de Educación Sexual Integral del Ministerio de Educación. El objetivo fue analizar las opiniones, creencias y actitudes de los docentes sobre temas relacionados a la sexualidad, el derecho al aborto, la diversidad sexual, la equidad de género y el género y la sexualidad. La muestra del estudio estuvo compuesta por 585 docentes. Para el análisis de los datos se utilizaron métodos multivariantes. Los resultados muestran que los estereotipos relacionados con el sexismo y la diversidad sexual varían considerablemente en cuanto a su repre- sentación estadística según las regiones del país. Por lo tanto, el mapa de las con- cepciones de los docentes sobre estos temas muestra una marcada heterogeneidad según regiones geográficas.

  20. Deep geological disposal research in Argentina

    International Nuclear Information System (INIS)

    Ninci Martinez, Carlos A.; Ferreyra, Raul E.; Vullien, Alicia R.; Elena, Oscar; Lopez, Luis E.; Maloberti, Alejandro; Nievas, Humberto O.; Reyes, Nancy C.; Zarco, Juan J.; Bevilacqua, Arturo M.; Maset, Elvira R.; Jolivet, Luis A.

    2001-01-01

    Argentina shall require a deep geological repository for the final disposal of radioactive wastes, mainly high-level waste (HLW) and spent nuclear fuel produced at two nuclear power plants and two research reactors. In the period 1980-1990 the first part of feasibility studies and a basic engineering project for a radioactive high level waste repository were performed. From the geological point of view it was based on the study of granitic rocks. The area of Sierra del Medio, Province of Chubut, was selected to carry out detailed geological, geophysical and hydrogeological studies. Nevertheless, by the end of the eighties the project was socially rejected and CNEA decided to stop it at the beginning of the nineties. That decision was strongly linked with the little attention paid to social communication issues. Government authorities were under a strong pressure from social groups which demanded the interruption of the project, due to lack of information and the fear it generated. The lesson learned was: social communication activities shall be carried out very carefully in order to advance in the final disposal of HLW at deep geological repositories (author)

  1. [Governance of PHC development in Rosario, Argentina].

    Science.gov (United States)

    Báscolo, Ernesto; Yavich, Natalia

    2010-01-01

    Describing the development of PHC policy as promoted by Rosario Municipality (Argentina). A case-study was carried out during 2007 and 2008. Data was collected from secondary and primary sources (interviews, organisational census and observations). PHC development stages were identified by recognising the social norms which produced institutional change and transformation in municipal health services structure and health care and management models. The prevailing modes of governance in each stage were reconognised and characterised (clan, hierarchy and/or incentives). Four stages were identified between 1990 and 2008: 1990-1995/hierarchical mode: primary health care level organisation autonomied from hospitals. 1995-2000/ clan mode: developing of participatory managerial boards and community participation. 2000-2004/ clan mode: maturation of the "PHC movement" in competition with hospitals. 2004-2008/ clan-hierarchical mode: "movement's" crisis and constructions of norms tending towards enhancing an integrated network. Strengthening and empowering first-level health-care produced innovation favouring: the consolidation of a "PHC movement" having strong social commitment and improved services performance. The clan governance mode (regulating collective action via voluntary adhesion to shared values) was crucial for developing PHC between 1995 and 2004. Later on, the movement's fragmentation and the challenges of integrating the health system required developing hierarchical regulation mechanisms to complement the governance clan mode regulation.

  2. Tracing the Iodine-129 fallout in Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Fernandez Niello, Jorge; Negri, Agustin; Arazi, Andres [Comision Nacional de Energia Atomica (CNEA), Buenos Aires (Argentina). Lab. TANDAR; Wallner, Anton [The Australian National University, Canberra (Australia). Dept. of Nuclear Physics; Niello, Jorge Fernandez [Universidad Nacional de San Martin, Campus Miguelete, Buenos Aires (Argentina)

    2012-07-01

    Full text: Long-lived {sup 129}I (half-life=15.6 Ma) is produced naturally by irradiation of atmospheric xenon by cosmic neutrons and in the sub-surface by spontaneous fission of {sup 238}U, from which the natural inventory of {sup 129}I has been estimated to be around 50,000 kg, only 140 kg of them corresponds to the hydrospheric inventory. Nuclear tests and accidents have added between 45-130 kg. Apart from a global atmospheric fallout component, {sup 129}I has been released from several nuclear fuel reprocessing plants located in the Northern Hemisphere (ca. 6000 kg) which serve as localized sources in oceanographic-tracer experiments. In this presentation, we report results from a study exploring the presence of {sup 129}I in the Southern Hemisphere by determining {sup 129}I/{sup 127}I isotopic ratios in water samples (rivers, lakes and shallow sea-water) taken at different latitudes in Argentina including Antarctica. The iodine-127 and iodine-129 concentrations were measured via ICP-MS (Inductively Coupled Plasma Mass Spectrometry) and Accelerator Mass Spectrometry (AMS), respectively. Distribution of both isotopes can be understood considering tropospheric circulation patterns, possible sources and regional precipitation patterns. Natural and anthropogenic sources for the Southern Hemisphere and their inventories are discussed. Similar contribution came from natural sources and nuclear tests. Contribution from the nuclear fuel reprocessing plants placed in the Northern hemisphere can be neglected. (author)

  3. Minilivestock in Argentina. Integration with Agricultural Production

    Directory of Open Access Journals (Sweden)

    Biasatti, NR.

    1999-01-01

    Full Text Available The development of alternative agricultural production can take different forms. In Argentina there is an important diversity of species available to be incorporated into production systems, giving support for the use of natural resources based on taking advantage of the regional fauna. Moreover the use of different animal species can be incorporated under the concept of the optimization of flows of energy and materials, tending to minimize the environmental impact of livestock production, and also to make more efficient use of the ingredients required for developing the activity. The integration of non-traditional species (minilivestock within the context of sustainable agricultural development was the motivation for the present study A module for raising Myocastor coypus (coypu or false nutha was developed, to which was linked a module for raising Eisenia foetida (the socalled red worm, in both cases with a dual purpose. Preliminary estimates were made of the productive aspects of both species, as well as an analysis of their integration, to understand the extent to which diversification linked with complementation tends to optimize the system.

  4. Natural radionuclides in drinking water in Argentina

    International Nuclear Information System (INIS)

    Bomben, A.M.; Palacios, M.A.

    2000-01-01

    As part of the national survey to evaluate natural radioactivity in the environment, concentration levels of natural uranium and 226 Ra have been analyzed in over 300 drinking water samples taken from different locations in Argentina. 226 Ra was determined by 222 Rn emanation and liquid scintillation counting, and natural uranium by a fluorimetric procedure. Values ranging from 0.03 to 24 μg.l -1 of natural uranium and from 0.06 to 50 μg.l -1 , were measured on drinking water samples taken from tap water systems and private wells, respectively. Concentrations up to 15 mBq.l -1 and to 22 mBq.l -1 of 226 Ra were found in drinking water samples taken from tap water systems and private wells, respectively. These values are compared with the reference values accepted for drinking water. Based on the water intake rate, the age distribution and the measured concentrations, an annual collective effective dose of 1.9 man Sv and an individual committed effective dose of 0.49 μSv.y -1 were calculated for the city of Buenos Aires adult inhabitants, for the ingestion of both natural radionuclides analyzed in drinking water. (author)

  5. Observatorios de Desarrollo Territorial Sustentable Mendoza, Argentina.

    Directory of Open Access Journals (Sweden)

    María Elina Gudiño

    2015-03-01

    Full Text Available El observatorio de Desarrollo territorial Sustentable para Mendoza, Argentina surge en el marco de la ley 8051/09 de Ordenamiento Territorial y Usos del Suelo. Se trata de una herramienta de comunicación para la validación y el monitoreo de indicadores, políticas, planes, programas y proyectos de índole territorial. El marco teórico-metodológico se sustenta en los principios del ordenamiento territorial y el enfoque de sistemas complejos adaptativos. La estructura se diseña en una plataforma tecnológica que permite estandarizar datos, sistematizar información, construir indicadores territoriales y publicar cartografía. Una vez logrado el prototipo, se conforma “Red Territorio” como modelo de gestión que permite interactuar entre instituciones del sector público, privado, científico y ONG. Actualmente, se está trabajando en la vinculación con las instituciones que formarán parte de la experiencia piloto de Red territorio y en el ajuste de la plataforma informática que le dará sustento.

  6. Medical response to radiation emergencies in Argentina

    International Nuclear Information System (INIS)

    Gisone, Pablo A.; Perez, Maria del R.; Dubner, Diana L.; Michelin, Severino C.; Vazquez, M.; Demayo, O.

    2006-01-01

    Although radiation accidents are not frequent, the increasing use of radioisotopes in medicine and industry increases the likelihood of such accidental situations. Additionally, risks posed by the malevolent use of radiation sources have been highlighted during the last few years. In this context, the enhancement of national capabilities for medical assistance of victims in radiation emergencies becomes relevant. This communication describes the organization of medical response to radiation emergencies existing in Argentina. A three-level system for medical response has been developed: pre-hospital response given on-site by local emergency services, assistance provided by emergency departments of local general hospitals and central reference hospitals for treatment of acute radiation syndrome, cutaneous radiation syndrome and internal contamination. An education and training program is regularly executed at the three levels, including theoretical background as well as practical training. Guidelines and protocols for medical handling of victims have been elaborated and implemented. Research and development of new strategies for diagnosis and treatment of radiation injuries are promoted by ARN in close collaboration with physicians belonging to reference hospitals. (author)

  7. el sistema de salud en Argentina

    Directory of Open Access Journals (Sweden)

    Víctor Abramovich

    2008-01-01

    Full Text Available As an answer to the new disparities and inequities which emerged from the health reforms in Argentina form the 1990´s, it appears the need to guarantee the health as a right. As a consequence, an important judicial activism begins to unfold in order to achieve greater guarantees in matters of health. Here, judicial activism refers to the strategic use of the law courts by organizations dedicated to the struggle of public interest and to the use of the law courts by private individuals to channel the complaints against the State or against health service providing companies. At present, both the Supreme National Court of Justice and the lower courts have dealt with an important number of cases related to the right to health. In the cases selected in this article, we analyze the type of conflict and the judicial answer, together with the possible effects of certain court decisions about the rules that govern the health system as finally conformed

  8. The blue land planarian Caenoplana coerulea, an invader in Argentina La planaria terrestre azul Caenoplana coerulea, un invasor en Argentina

    Directory of Open Access Journals (Sweden)

    Lisandro Héctor Luis-Negrete

    2011-03-01

    Full Text Available The blue land planarian Caenoplana coerulea is reported from Argentina (Buenos Aires province. We found C. coerulea in the east central region of Argentina in anthropic environments. The specimens that we found have the characteristic of the species found in others regions; that is, a bluish dorsal surface with a yellow mid-dorsal stripe and eyes forming a single row around the anterior tip, clustered laterally. This is the first record of this species from the Neotropical Region, and together with Bipalium kewense are the only 2 species of exotic terrestrial planarians so far recorded in Argentina.La planaria terrestre azul Caenoplana coerulea se registra para el centro este de Argentina (provincia de Buenos Aires, en ambientes antropizados. Los ejemplares encontrados presentan las características de la especie registrada en otras regiones, con una superficie dorsal azulada y una hilera medio dorsal amarilla, y ojos formando una hilera alrededor del extremo anterior, agrupados lateralmente. Es la primera vez que se cita dicha especie en la Región Neotropical, y junto a Bipalium kewense son las únicas planarias terrestres exóticas registradas en Argentina.

  9. Collecting Solar Energy. Solar Energy Education Project.

    Science.gov (United States)

    O'Brien, Alexander

    This solar energy learning module for use with junior high school students offers a list of activities, a pre-post test, job titles, basic solar energy vocabulary, and diagrams of solar energy collectors and installations. The purpose is to familiarize students with applications of solar energy and titles of jobs where this knowledge could be…

  10. Biotechnology in Argentina: New products, new multilateral challenges

    Directory of Open Access Journals (Sweden)

    Luciano M. Donadio Linares

    2016-06-01

    Full Text Available Since 20 years ago, a public-private alliance has transformed Argentina into a remarkable global actor in developing biotechnological products for food and renewable energies. This strategic alliance resulted in the boosting of scientific knowledge, the extension of the production boundary, the expansion of international trade and the creation of the conditions for an integral development. Furthermore, given the characteristics of biotechnology as a new phenomenon, wto has become the field within where a number of disputes take place, disputes which not only controvert trade issues, but also the State’s limits to design and apply public policies on the matter at issue. As a consequence, the present article seeks to, on the one hand, describe how Argentina built its public policy on Biotechnology and, on the other hand, analyze the challenges that Argentina faces within the multilateral trade system

  11. Tareas que realizan los bibliotecarios universitarios en Argentina

    Directory of Open Access Journals (Sweden)

    Werner Agazzi

    2011-08-01

    Full Text Available El presente estudio es una investigación descriptiva que pretende conocer las tareas que realizan los bibliotecarios en las bibliotecas universitarias argentinas, abordando el tema desde la perspectiva de las competencias laborales y el actual perfil del bibliotecario universitario. Mediante la utilización de un cuestionario enviado a las direcciones de e-mail de bibliotecas universitarias argentinas se compilaron datos sobre las tareas que realizan los bibliotecarios en esas instituciones. A través de este proceso también se compilaron datos relacionados con las tareas de comunicación vía e-mail por parte de las bibliotecas universitarias argentinas.

  12. The regulatory control of radioactive sources in Argentina

    International Nuclear Information System (INIS)

    Rojkind, R.H.

    1998-01-01

    Argentina has been conducting nuclear activities for more than forty years, and had established a Regulatory Authority as early as in 1956. Procedures for compliance monitoring and enforcement have been in use in the regulatory control of radioactive sources, and regulatory standards and regulations were in force in Argentina before the accident in Goiania. The conclusions drawn from the Goiania accident encouraged the Argentine authorities to improve some regulatory procedures and helped to enhance the quality of the regulatory process. As a result, the effectiveness of the control of spent radioactive sources has gradually increased, and enforcement actions to prevent radioactive sources ending up in the public domain have improved. Lessons learned in Argentina from the accident in Goiania are presented as well as the main characteristics of an effective enforcement programme to prevent radiological accidents when radioactive sources are used for industrial, medical, research and teaching purposes. (author)

  13. Tribulations and achievements: the early history of Olympism in Argentina.

    Science.gov (United States)

    Torres, C R

    2001-01-01

    By the end of the nineteenth century, modern sport had enchanted the people of Argentina. At that time the nation enjoyed a remarkable degree of economic prosperity and embarked on increasing political democratization. These circumstances, along with the fact that the nation was represented from the beginning, in 1894, on the International Olympic Committee seemed to favour Argentina as the spearhead of the diffusion of Olympism throughout South America. However, the country only enjoyed its first official Olympic participation in the Paris Games of 1924 - a few months after the establishment of the Argentine Olympic Committee. This essay explores the reception and diffusion of Olympism in Argentina. It reveals a process of gradual adoption including conflicting views on the relationship between the state and sport, several attempts at institutionalization, international misunderstandings and the role of politics and class.

  14. Psychotherapy in Argentina: a clinical case from an integrative perspective.

    Science.gov (United States)

    Gómez, Beatriz

    2007-08-01

    The article describes psychotherapy practice in Argentina. It outlines the main features of training and regulation of clinical psychologists. A brief description of the main treatment approaches and the major current challenges is presented. Subsequently it delineates the probable treatment locations and options for a 30-year-old woman, Mrs. A, seeking psychological help in Argentina. The case is then considered from an integrative perspective starting with the intake process, which includes a comprehensive pretreatment assessment followed by the treatment plan. Its course is described as composed of four stages: (1) psychoeducational initial intervention, (2) psychotherapy for symptom alleviation, (3) marital treatment, and (4) psychoeducational final intervention. Posttreatment evaluation and possible outcome and prognosis are presented, as well as factors that might prevent improvement. The article ends with a hopeful view of the future role of psychotherapy in Argentina. (c) 2007 Wiley Periodicals, Inc.

  15. Brasil, Argentina e América do Sul

    Directory of Open Access Journals (Sweden)

    Paulo Nogueira Batista Jr.

    2005-12-01

    Full Text Available ESTE trabalho discute alguns aspectos da evolução econômica recente do Brasil, da Argentina e de outros países da América do Sul. Tendências econômicas e intelectuais perigosas, tais como a "globalização", o chamado Consenso de Washington, a dolarização e as negociações da Alca (Área de Livre Comércio das Américas, perderam ímpeto e a América do Sul está se movendo gradualmente na direção de um posicionamento mais independente na condução das suas política econômicas e internacionais. As mudanças foram muito mais significativas na Argentina do que no Brasil e isso se tornou fonte de alguma tensão entre os dois principais países sul-americanos. Não obstante, uma aliança estratégica entre Argentina e Brasil continua sendo a pedra angular da integração da América do Sul.THIS PAPER discusses some aspects of the recent economic evolution of Brazil, Argentina and other South American countries. Dangerous economic and intellectual trends, such as "globalization", the so-called Washington Consensus, dollarization, and FTAA (Free Trade Area of the Americas negotiations, have lost momentum and South America is moving gradually towards a more independent stance in the conduct of its economic and foreign policies. Changes have been much more significant in Argentina than in Brazil and this has become a source of some tension between the two major South American countries. Nevertheless, a strategic alliance between Argentina and Brazil remains the corner stone of South American integration.

  16. Concentrated solar power generation using solar receivers

    Science.gov (United States)

    Anderson, Bruce N.; Treece, William Dean; Brown, Dan; Bennhold, Florian; Hilgert, Christoph

    2017-08-08

    Inventive concentrated solar power systems using solar receivers, and related devices and methods, are generally described. Low pressure solar receivers are provided that function to convert solar radiation energy to thermal energy of a working fluid, e.g., a working fluid of a power generation or thermal storage system. In some embodiments, low pressure solar receivers are provided herein that are useful in conjunction with gas turbine based power generation systems.

  17. Solar charge controller in solar street light

    OpenAIRE

    Dong, Haibo

    2014-01-01

    Recently, with the rapid development of scientific technology, the conventional energy cannot meet the requirement of human beings. People are looking for the utilization of renew energy. Solar en-ergy as a new clean energy has attract the eyes of people. The applications of solar energy are popular to human society. Solar street light is a good example. This thesis will focus on a deeper research of the popular and ubiquitous solar street light in China. However, solar charge controll...

  18. Solar Training Network and Solar Ready Vets

    Energy Technology Data Exchange (ETDEWEB)

    Dalstrom, Tenley Ann

    2016-09-14

    In 2016, the White House announced the Solar Ready Vets program, funded under DOE's SunShot initiative would be administered by The Solar Foundation to connect transitioning military personnel to solar training and employment as they separate from service. This presentation is geared to informing and recruiting employer partners for the Solar Ready Vets program, and the Solar Training Network. It describes the programs, and the benefits to employers that choose to connect to the programs.

  19. Solar club

    CERN Multimedia

    Solar club

    2013-01-01

    SOLAR CLUB Le  CERN-Solar-Club souhaite une  très bonne année 2013 à tous les Cernois et Cernoises, et remercie encore une fois  tous ceux et celles qui, fin octobre, par leur vote, nous ont permis de finir dans les 5 premiers du concours "Conforama Solidaire" et ainsi financer nôtre projet "énergie solaire et eau potable pour Kilela Balanda" en République Démocratique du Congo (voir : http://www.confo.ch/solidarite/?lang=fr). Nous vous annoncons également notre Assemblée Générale Annuelle jeudi 21 février à 18 h 00 Salle C, 1er étage, Bât. 61 Vous êtes les bienvenus si vous souhaitez en savoir un peu plus sur les énergies renouvelables.

  20. Fisica solare

    CERN Document Server

    Degl’Innocenti, Egidio Landi

    2008-01-01

    Il volume è un'introduzione alla Fisica Solare che si propone lo scopo di illustrare alla persona che intende avvicinarsi a questa disciplina (studenti, dottori di ricerca, ricercatori) i meccanismi fisici che stanno alla base della complessa fenomenologia osservata sulla stella a noi più vicina. Il volume non ha la pretesa di essere esauriente (basta pensare che la fisica solare spazia su un gran numero di discipline, quali la Fisica Nucleare, la Termodinamica, L'Elettrodinamica, la Fisica Atomica e Molecolare, la Spettoscopia in tutte le bande dello spettro elettromagnetico, la Magnetoidrodinamica, la Fisica del Plasma, lo sviluppo di nuova strumentazione, l'Ottica, ecc.). Piuttosto, sono stati scelti un numero di argomenti di rilevanza fondamentale nello studio presente del Sole (soprattutto nei riguardi delle osservazioni da terra con grandi telescopi) e su tali argomenti si è cercato di dare una panoramica generale, inclusiva dell'evoluzione storica, senza scendere in soverchi dettagli. Siccome la Fis...

  1. Solar reflector

    Energy Technology Data Exchange (ETDEWEB)

    Dvorak, J

    1983-01-15

    The reflector in the form of part of a cylindrical surface delimited by two envelopes is installed on a platform which can move on an inclined curvilinear path. The angle of inclination of the path depends on the latitude of the locality. The reflected rays are focused on the tubular absorber. One of the axes of the platform is linked to a brake controlled by a sensor for intensity of solar radiation. The sensor is a pipe filled with liquid with high value of the temperature expansion coefficient, for example alcohol. The pipe is insulated from one side and is accessible to the solar rays from the opposite. One end of the pipe is equipped with a bending end or piston. In order to expand the fluid in the sensor, the pipe acts on the brake, and the reflector is installed in a position corresponding to the maximum radiation intensity.

  2. Cryptosporidium varanii infection in leopard geckos (Eublepharis macularius) in Argentina.

    Science.gov (United States)

    Dellarupe, A; Unzaga, J M; Moré, G; Kienast, M; Larsen, A; Stiebel, C; Rambeaud, M; Venturini, M C

    2016-01-01

    Cryptosporidiosis is observed in reptiles with high morbidity and considerable mortality. The objective of this study was to achieve the molecular identification of Cryptosporidium spp. in pet leopard geckos (Eublepharis macularius) from a breeder colony in Buenos Aires, Argentina. Oocysts comparable to those of Cryptosporidium spp. were detected in three geckos with a history of diarrhea, anorexia and cachexia. Molecular identification methods confirmed the presence of Cryptosporidium varanii (syn. C. saurophilum). This agent was considered to be the primary cause of the observed clinical disease. This is the first description of C. varanii infection in pet reptiles in Argentina.

  3. Primer registro de Vespula vulgaris (Hymenoptera: Vespidae) en la Argentina

    OpenAIRE

    Maité MASCIOCCHI; Jacqueline R. BEGGS; James M. CARPENTER; Juan C. CORLEY

    2010-01-01

    Vespula vulgaris (Linnaeus) es un véspido social nativo de la región Holártica. En este trabajo reportamos la primera detección de esta especie en Argentina. Obreras de esta avispa fueron capturadas cerca de la ciudad de San Carlos de Bariloche (Argentina) en Febrero de 2010, mientras se tomaban muestras de otra avispa invasora, Vespula germanica (Fabricius) o chaqueta amarilla, de morfología externa y hábitos similares a la anteriormente mencionada. Además, detallamos algunos caracteres de i...

  4. First record of Vespula vulgaris (Hymenoptera: Vespidae) in Argentina

    OpenAIRE

    Masciocchi, Maité; Beggs, Jacqueline R.; Carpenter, James M.; Corley, Juan Carlos

    2016-01-01

    Vespula vulgaris (Linnaeus) es un véspido social nativo de la región Holártica. En este trabajo reportamos la primera detección de esta especie en Argentina. Obreras de esta avispa fueron capturadas cerca de la ciudad de San Carlos de Bariloche (Argentina) en Febrero de 2010, mientras se tomaban muestras de otra avispa invasora, Vespula germanica (Fabricius) o chaqueta amarilla, de morfología externa y hábitos similares a la anteriormente mencionada. Además, detallamos algunos caracteres de i...

  5. Primer registro de Vespula vulgaris (Hymenoptera: Vespidae en la Argentina

    Directory of Open Access Journals (Sweden)

    Maité MASCIOCCHI

    2010-01-01

    Full Text Available Vespula vulgaris (Linnaeus es un véspido social nativo de la región Holártica. En este trabajo reportamos la primera detección de esta especie en Argentina. Obreras de esta avispa fueron capturadas cerca de la ciudad de San Carlos de Bariloche (Argentina en Febrero de 2010, mientras se tomaban muestras de otra avispa invasora, Vespula germanica (Fabricius o chaqueta amarilla, de morfología externa y hábitos similares a la anteriormente mencionada. Además, detallamos algunos caracteres de identificación y características biológicas.

  6. Redefining the public sphere: self-managed schools in Argentina

    OpenAIRE

    Feldfeber, Myriam

    2003-01-01

    El Proyecto de las Escuelas Experimentales o Autogestionadas de la Provincia de San Luis adquiere sentido en el marco de la denominada Transformación Educativa y de las políticas desarrolladas en las últimas décadas en Argentina, que, al igual que en gran parte de los países latinoamericanos, han estado orientadas por discursos y prácticas tendientes a legitimar un nuevo modelo económico, social, político, cultural y educativo. La reforma educativa argentina de la década del '90 puede analiza...

  7. Forensic population data for 20 STR loci in Argentina

    OpenAIRE

    Borosky, Alicia; Toscanini, Ulises; Gómez, Andrea; Parolin, María Laura; Basso, Nestor Guillermo; Vullo, Carlos

    2017-01-01

    In order to provide useful information of forensic interest for the new markers included in the PowerPlex1 21 System (Promega Corp, USA), namely D1S1656, D6S1043 and D12S391, a population study was conducted in a sample of 907 unrelated healthy individuals from Argentina. Samples were randomly chosen from routine paternity testing. Blood samples or buccal swabs were collected after informed consent, taken from individuals of different urban populations from 7 provinces of Argentina: 464 indiv...

  8. Horizontalidad, autogestión y protagonismo en Argentina

    OpenAIRE

    Marina Sitrin

    2010-01-01

    Este artículo trata los movimientos sociales autónomos que surgieron después de la crisis económica y la posterior rebelión popular en Argentina en diciembre de 2001. Los movimientos autónomos en la Argentina, como tantos movimientos en el mundo de hoy, son movimientos basados en la creación de nuevas relaciones sociales y comunidades ahora, al mismo tiempo que proyectan nuevas sociedades y las relaciones en y para el futuro. Son movimientos con una concepción diferente del tiempo y el espaci...

  9. A new genus of Platynini (Coleoptera: Carabidae) from Argentina

    OpenAIRE

    ROIG-JUÑENT, Sergio

    2003-01-01

    Los Platynini constituyen un grupo de carábidos distribuidos ampliamente en América del Sur, existiendo la mayor diversidad de especies en las regiones tropicales de altura de Los Andes. En la Argentina y Chile, la mayoría de las especies de Platynini se hallan distribuidas en áreas extracordilleranas, conociéndose pocos datos para la región Andina. A partir de recolecciones realizadas en la Precordillera y Cordillera de los Andes en Mendoza (Argentina), se hallaron ejemplares pertenecientes ...

  10. Cryptosporidium varanii infection in leopard geckos (Eublepharis macularius in Argentina

    Directory of Open Access Journals (Sweden)

    A. Dellarupe

    2016-06-01

    Full Text Available Cryptosporidiosis is observed in reptiles with high morbidity and considerable mortality. The objective of this study was to achieve the molecular identification of Cryptosporidium spp. in pet leopard geckos (Eublepharis macularius from a breeder colony in Buenos Aires, Argentina. Oocysts comparable to those of Cryptosporidium spp. were detected in three geckos with a history of diarrhea, anorexia and cachexia. Molecular identification methods confirmed the presence of Cryptosporidium varanii (syn. C. saurophilum. This agent was considered to be the primary cause of the observed clinical disease. This is the first description of C. varanii infection in pet reptiles in Argentina.

  11. International Uranium Resources Evaluation Project (IUREP) national favourability studies: Argentina

    International Nuclear Information System (INIS)

    1977-08-01

    Argentina is a predominantly lowland area of 2,789,240 square kilometers. The capital is Buenos Aires. The entire length of Argentina is bordered on the west by the Andes Mountains. Tile Northwest Andes-Piedmont region consists of deep valleys containing salt basins and volcanoes, and is an earthquake zone. Patagonia, in the south, is essentially an arid region of windy plateaus and valleys. The southern Andes are narrower and lower than the northern Andes and in the extreme south contain glaciers and ice fields. The east-central plain (Pampa) of Argentina has dry and humid sectors and contains most of the population. The largest rivers are chiefly in the northeast, many having only seasonal flow. There has been extensive surface and subsurface exploration for uranium in Argentina for over 20 years. Although most of the work has been performed by the CNEA, advisors from the U.S. and from the IAEA have also taken part. Private industry has been involved, but apparently only on a small scale. In the OECD report of 1970, it was stated that 400,000 square kilometers of Argentina appear very favorable for uranium while an additional 900,000 square kilometers offer fair possibilities. Uranium exploration to date suggests that sandstones of Permian and Cretaceous ages exposed in Western Argentina in the Cordillera are very promising for discovery of new deposits. Past CNEA estimates have indicated that there is considerable hope for new discoveries in those areas where reserves are now known. In addition to the known uraniferous provinces which are indeed favorable for further exploration, there are several other large areas that warrant attention. There are, for example, in the Santa Cruz area of about 15,500 square kilometers Cretaceous and Tertiary sediments with favorable facies for uranium deposition. In the Patagonia Cordillera, Jurassic, Cretaceous, and Tertiary sediments are of interest for prospecting, These rocks contain carbonaceous material and have been

  12. Regional safeguards arrangements: The Argentina-Brazil experience

    International Nuclear Information System (INIS)

    Marzo, M.; Gonzales, H.L.; Iskin, M.C.L.; Vicens, H.

    1997-01-01

    A Common System of Accounting and Control of Nuclear Material (SCCC) was established by Argentina and Brazil in July 1992. It is a full scope safeguard's system in both countries. The Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) was created to apply the SCCC. The main elements of the SCCC are presented. The main safeguards' procedures are described. A brief discussion of the inspection methodology and its impact for facility operators is performed. The safeguard's implementation from the operator's point of view is commented, taking as example a fuel fabrication plant in Argentina and a uranium enrichment plant in Brazil. (author)

  13. Cultivos transgénicos en Argentina : mitos y realidades

    OpenAIRE

    Cantamutto, Miguel; Poverene, Mónica

    2003-01-01

    Cantamutto, M., Poverene, M. (2003). Cultivos transgénicos en Argentina: mitos y realidades. Redes, 10(20), 171-181. La producción creciente de cultivos transgénicos en la Argentina es observada con preocupación por la población debido a que aparecen cada vez más voces planteando dudas y amenazas acerca de las consecuencias del uso de esta tecnología, que incluso se atribuye a oscuras manipulaciones políticas. ¿Tienen fundamento esos conceptos? ¿A qué aspectos del uso de organismos genétic...

  14. Education and Dictatorship in Argentina 1976-1983

    OpenAIRE

    Kaufmann, Carolina

    2000-01-01

    Este artículo señala aspectos generales del autodenominado “Proceso” acaecido en Argentina (1976-1983). Se ofrecen evidencias de censura e imposición autoritaria en el sistema educativo. Asimismo, se explicitan elementos constitutivos de la educación personalizada perennialista y de la pedagogía de los valores que fue adoptada durante aquellos años. This article indicates general aspects of the self-styled "Process" occurred in Argentina (1976-1983). Evidence of censorship and authoritar...

  15. The other immigration to Argentina: the case of Adolf Eichmann

    Directory of Open Access Journals (Sweden)

    Christian Cwik

    2014-01-01

    Full Text Available Adolf Eichmann llegó a la Argentina como otros 500 Nazis forajidos a través de una red de traficantes ilegales de migrantes entre 1945 y 1955. Esta red fue el resuldado del interés de la República de Argentina, la Cruz Roja, la Caritas y el Vaticano por un lado y por el otro los delincuentes. Eichmann la cara de la ‘banalidad del mal’, como Hannah Arendt escribió en su libro “Eichmann en Jerusalén: un estudio sobre la banalidad del mal”(2ª. edición, traducción de Carlos Ribalta, Barcelona, Lumen, 1999 tuvo bastantes problemas para integrarse en la sociedad argentina y por ende, fracasó. Adolf Eichmann nacido en 1906 en Solingen/Alemania personificó un caractér típico de la sociedad en la posguerra austriaca-alemana, lo que hizo que fracasara en su vida laboral varias veces durante los veintes y los inicios de los treinta del siglo XX.Palabras Clave: Adolf Eichmann;  Holocausto; Tráfico Ilegal de Migrantes; Inmigración en Argentina; Peronismo; Tribunales Internacionales. La otra inmigración a Argentina: El caso de Adolf EichmannAbstractAdolf Eichmann arrived to Argentina along with other 500 runaway Nazis thorugh a smuggling network between 1945 and 1955. This network was the result of the interest shown by the The Republic of Argentina, the Red Cross, Caritas and the Vatican in one hand; in the other, the criminals of war. Eichmann, the face of Hanna Arendt’s t “Banality of Evil” had numerous troubles to integrate to argentinian society, failing as a result.Adolf Eichmann, born in 1906 in Solingen, Germany, personified a typical Austrian-german postwar character, a fact that conduced to his laboral failure in the twentys and early thirties of the twentieth century.Keywords:Adolf Eichmann; Holocaust; Nazi Criminals; Trafficking of migrants; Post War Period; Immigration to Argentina; Peronism; Mossad; International Tribunal. 

  16. Two new species of Psectrascelis (Coleoptera: Tenebrionidae from western Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo E. FLORES

    2007-01-01

    Full Text Available Se describen dos nuevas especies del género Psectrascelis Solier (Pimeliinae: Nycteliini del oeste de Argentina, P. argentina sp. nov. a gran altitud en la Precordillera de San Juan y P. telteca sp. nov. en la llanura de Mendoza, y se las incluye en la clave mas reciente del género. Se proveen datos sobre la distribución y el hábitat, así como fotografías de los adultos y pronotos y dibujos de los genitalia masculinos.

  17. Solar pulsations

    International Nuclear Information System (INIS)

    Zirker, J.B.

    1980-01-01

    Oscillations of the surface of the sun, with periods between 5 and 160 min, have been observed by several spectroscopic techniques, and preliminary interpretations have been offered. The 5-min oscillations are global, nonradial, acoustic standing waves in the subsurface zone. Internal differential rotation speeds have been deduced from the Doppler splitting of these waves. Oscillations with longer periods have been reported, but need confirmation. The longest periods offer a tool for investigating the solar interior

  18. Efecto del método de secado en la longevidad y la calidad de las semillas de Bauhinia purpurea.: I. Almacenamiento en Condiciones Ambientales Effect of the drying method on the longevity and quality of seeds from Bauhinia purpurea.: I. Storage under ambient conditions

    Directory of Open Access Journals (Sweden)

    Marlen Navarro

    2007-11-01

    Full Text Available Se realizó un experimento con el objetivo de determinar la influencia combinada de diferentes métodos de secado, las condiciones de almacenamiento al ambiente y la edad fisiológica de las semillas de B. purpurea, en la capacidad germinativa y en la calidad de estas. Los tratamientos para el secado fueron: A en las legumbres, B artificial, y C al sol. Se determinó el porcentaje de viabilidad y de germinación, así como el contenido de humedad (CH, con una frecuencia mensual durante un año de almacenamiento; además se registró la temperatura y la humedad relativa (máxima y mínima durante el período evaluado. En el procesamiento de la información se utilizaron análisis multivariados (GLM y Factorial. En los tratamientos A y C se observaron semejanzas en cuanto a la viabilidad y la germinación, aunque las semillas alcanzaron la muerte fisiológica a los siete y nueve meses de permanencia en el almacén, respectivamente. El secado de las semillas con silicagel mostró que la pérdida de la capacidad germinativa siguió un modelo polinomial cúbico, con una marcada tendencia a la linealidad, y al finalizar el estudio fue de 70%. Las diferencias entre el CH de las semillas secadas artificialmente (B y al sol (C permitieron confirmar que la longevidad en B fue dos a cuatro veces mayor que en C. Los factores más influyentes en el ritmo de pérdida de la calidad de las semillas B. purpurea almacenadas al ambiente fueron el contenido de humedad y la edad.A trial was carried out with the objective of determining the combined influence of different drying methods, the storage under ambient conditions and the physiological age of the seeds from B. purpurea, on their germination capacity and quality. The treatments for drying were: A in the pods, B artificial and C under sunlight. The percentage of viability and germination, as well as the moisture content (MC, were determined, with a monthly frequency during a year of storage; in addition the

  19. Influence of fruit maturity and calyx drying on cape gooseberry (Physalis peruviana l., stored at 18°C Influencia de la madurez del fruto y del secado del cáliz en uchuva (Physalis peruviana l., almacenada a 18°C

    Directory of Open Access Journals (Sweden)

    Moreno Paola

    2006-12-01

    Full Text Available

    Cape gooseberry fruits at the maturity stages 3 (yellow greenish or 5 (yellow orange and with calyx drying for 6 hours at 18 or 24ºC, were stored at the temperature of 18ºC and 85 % relative humidity for 20 days, to evaluate physical-chemical and physiological changes. The cape gooseberry, a climacteric fruit, presented the maximum of respiration between 6 and 8 days of storage. The 6th day of storage seems to be crucial due to the very high metabolism and the maximum contents of sugars and acids on this day. Soluble solids tended to increase and the titratable acids went to diminish. The fruit's sugar content was characterized by a major concentration of sucrose, followed by glucose and fructose. While the citric acid showed its highest level at the sixth storage day that of the tartaric acid increased constantly up to 18 days. The fruit maturity stage 3 is that which best conserved the sugars and organic acids evaluated. The maturity index influenced more than calyx drying the postharvest behavior of cape gooseberry. Calyx drying at 24ºC caused the highest climacteric peak and originated the highest loss of fresh weight in fruits harvested at maturity index 5.

    Key words: Physalis peruviana; respiration; climacteric fruit; Brix degrees; organic acids; sugars.

    Frutos de uchuva en estados de madurez 3 (amarillo verdoso ó 5 (amarillo naranja y con secado del cáliz durante seis horas a 18 y 24ºC, se almacenaron a temperatura ambiente (18ºC y humedad relativa del 75% durante 20 días, con el fin de evaluar cambios físico-químicos y fisiológicos. La uchuva, fruto climatérico, presentó el máximo de respiración entre los 6 y 8 días de almacenamiento. El día 6 de almacenamiento parece ser crucial debido al metabolismo muy elevado y los contenidos más altos de azúcares y ácidos. Los sólidos solubles totales tendieron a aumentar, la acidez titulable a disminuir. El contenido de azúcares se caracterizó por

  20. Scenarios for wind power in Brazil, Argentina and Chile; Cenarios para a energia eolio eletrica no Brasil, Argentina e Chile

    Energy Technology Data Exchange (ETDEWEB)

    Dedecca, Joao Gorestein; Nogueira, Larissa Goncalves; Jannuzzi, Gilberto de Martino [Universidade Estadual de Campinas (UNICAMP), SP (Brazil). Fac. de Engenharia Mecanica. Dept. de Energia], emails: jdedecca@fem.unicamp.br, larissa@fem.unicamp.br, januzzi@fem.unicamp.br; Gomes, Rodolfo Dourado [International Energy Initiative-Latin America (IEI-LA), Campinas, SP (Brazil)], email: rodolfo@iei-la.org

    2010-07-01

    The Chilean, Argentinean and Brazilian power matrixes presented in the last two decades a growth of the non-renewable energy sources share, especially fossil sources, mainly in installed capacity and in a lesser degree in energy production. Greenpeace and the European Renewable Energy Council have elaborated a reference energy scenario together with a scenario analyzing the institution of ample measures for the promotion of renewable energy sources. Feed-in tariffs and auction or bidding mechanisms implemented in Brazil and Argentina and the renewable portfolio standard implemented in Chile allied with the wind industry state in these countries indicate that Chile and Argentina will fulfill the 2020 wind power installed capacity predicted in the reference scenarios, while Brazil will reach the energy revolution scenario prediction. Important energy policy changes are required if the Chile and Argentina energy revolution scenarios wind power installed capacity are to become a reality in 2020. (author)

  1. Solar Chameleons

    CERN Document Server

    Brax, Philippe

    2010-01-01

    We analyse the creation of chameleons deep inside the sun and their subsequent conversion to photons near the magnetised surface of the sun. We find that the spectrum of the regenerated photons lies in the soft X-ray region, hence addressing the solar corona problem. Moreover, these back-converted photons originating from chameleons have an intrinsic difference with regenerated photons from axions: their relative polarisations are mutually orthogonal before Compton interacting with the surrounding plasma. Depending on the photon-chameleon coupling and working in the strong coupling regime of the chameleons to matter, we find that the induced photon flux, when regenerated resonantly with the surrounding plasma, coincides with the solar flux within the soft X-ray energy range. Moreover, using the soft X-ray solar flux as a prior, we find that with a strong enough photon-chameleon coupling the chameleons emitted by the sun could lead to a regenerated photon flux in the CAST pipes, which could be within the reach...

  2. Solar chameleons

    International Nuclear Information System (INIS)

    Brax, Philippe; Zioutas, Konstantin

    2010-01-01

    We analyze the creation of chameleons deep inside the Sun (R∼0.7R sun ) and their subsequent conversion to photons near the magnetized surface of the Sun. We find that the spectrum of the regenerated photons lies in the soft x-ray region, hence addressing the solar corona problem. Moreover, these back-converted photons originating from chameleons have an intrinsic difference with regenerated photons from axions: their relative polarizations are mutually orthogonal before Compton interacting with the surrounding plasma. Depending on the photon-chameleon coupling and working in the strong coupling regime of the chameleons to matter, we find that the induced photon flux, when regenerated resonantly with the surrounding plasma, coincides with the solar flux within the soft x-ray energy range. Moreover, using the soft x-ray solar flux as a prior, we find that with a strong enough photon-chameleon coupling, the chameleons emitted by the Sun could lead to a regenerated photon flux in the CAST magnetic pipes, which could be within the reach of CAST with upgraded detector performance. Then, axion helioscopes have thus the potential to detect and identify particle candidates for the ubiquitous dark energy in the Universe.

  3. Solar flares

    International Nuclear Information System (INIS)

    Kaastra, J.S.

    1985-01-01

    In this thesis an electrodynamic model for solar flares is developed. The main theoretical achievements underlying the present study are treated briefly and the observable flare parameters are described within the framework of the flare model of this thesis. The flare model predicts large induced electric fields. Therefore, acceleration processes of charged particles by direct electric fields are treated. The spectrum of the accelerated particles in strong electric fields is calculated, 3 with the electric field and the magnetic field perpendicular and in the vicinity of an X-type magnetic neutral line. An electromagnetic field configuration arises in the case of a solar flare. A rising current filament in a quiescent background bipolar magnetic field causes naturally an X-type magnetic field configuration below the filament with a strong induced electric field perpendicular to the ambient magnetic field. This field configuration drives particles and magnetic energy towards the neutral line, where a current sheet is generated. The global evolution of the fields in the flare is determined by force balance of the Lorentz forces on the filament and the force balance on the current sheet. The X-ray, optical and radio observations of a large solar flare on May 16, 1981 are analyzed. It is found that these data fit the model very well. (Auth.)

  4. Element fluxes from Copahue Volcano, Argentina

    Science.gov (United States)

    Varekamp, J. C.

    2003-12-01

    Copahue volcano in Argentina has an active volcano-magmatic hydrothermal system that emits fluids with pH=0.3 that feed a river system. River flux measurements and analytical data provide element flux data from 1997 to 2003, which includes the eruptive period of July to December 2000. The fluids have up to 6.5 percent sulfate, 1 percent Cl and ppm levels of B, As, Cu, Zn and Pb. The hydrothermal system acts as a perfect scrubber for magmatic gases during the periods of passive degassing, although the dissolved magmatic gases are modified through water rock interaction and mineral precipitation. The magmatic SO2 disproportionates into sulfate and liquid elemental sulfur at about 300 C; the sulfate is discharged with the fluids, whereas the liquid sulfur is temporarily retained in the reservoir but ejected during phreatic and hydrothermal eruptions. The intrusion and chemical attack of new magma in the hydrothermal reservoir in early 2000 was indicated by strongly increased Mg concentrations and Mg fluxes, and higher Mg/Cl and Mg/K values. The hydrothermal discharge has acidified a large glacial lake (0.5 km3) to pH=2 and the lake effluents acidify the exiting river. Even more than 100 km downstream, the effects of acid pulses from the lake are evident from red coated boulders and fish die-offs. The river-bound sulfate fluxes from the system range from 70 to 200 kilotonnes/year. The equivalent SO2 output of the whole volcanic system ranges from 150 to 500 tonnes/day, which includes the fraction of native sulfur that formed inside the mountain but does not include the release of SO2 into the atmosphere during the eruptions. Trace element fluxes of the river will be scaled up and compared with global element fluxes from meteoric river waters (subterranean volcanic weathering versus watershed weathering).

  5. Uranium deposit types and resources of Argentina

    International Nuclear Information System (INIS)

    Lopez, L.; Cuney, M.

    2014-01-01

    The uranium-related activities in Argentina begun in the 1950s and, as a result of the systematic exploration, several types of deposits have been discovered since then: volcanic and caldera-related, sandstone-hosted, vein spatially related to granite (intragranitic and perigranitic) and surficial. The deposits that have been the focus of the most important uranium exploitations are the ones that belong to the volcaniclastic type. These are localized in Permian formations associated with synsedimentary acid volcanism in the Sierra Pintada district (Mendoza province). The volcanic and caldera related type is also present in the Laguna Colorada deposit (Chubut province) located in the San Jorge basin (Cretaceous). Several important uranium mineralisations have been identified in Cretaceous fluvial sandstones and conglomerates, among which the most relevant is the Cerro Solo deposit (Chubut province) that corresponds to the paleochannel structure subtype. Other subtypes of sandstone model have been studied. For instance, the Don Otto deposit (Salta province), located in the Salta Group Basin (Cretaceous - Tertiary), belongs to the tabular U-V subtype. The roll front subtype can be also found in the Los Mogotes Colorados deposit (La Rioja province) which is hosted by Carboniferous continental sandstones. The uranium mineralisations in veins and disseminated episyenites within peraluminous leucogranites of the Sierras Pampeanas (Cordoba and San Luis provinces) represent other types of existing deposits. These granites are Devonian – Carboniferous and the related deposits are comparable to those from the Middle European Variscan. There are also other vein-type uranium deposits located in metamorphic basement in the periphery of high potassium calcalkaline granites (Sierras Pampeanas of Catamarca and La Rioja provinces), where the mineralisation control is mainly structural. The current uranium identified resources of the country are approximately 24,000 tU in the

  6. Irradiation of spices produced in Argentina

    International Nuclear Information System (INIS)

    Kairiyama, E.; Narvaiz, P.; Lescano, G.; Kaupert, N.L.

    1988-01-01

    Some spices produced in Argentina ground red pepper, anise, fennel, laurel, paprika, Cayenne pepper, cumin (seed), and mayoram (leaves and flowers), were irradiated to inactivate microbial lead, without causing significant chemical or sensory alterations. They were packed in polyethylene bags of 100 m thickness, and irradiated at the 60 Co semi-industrial facility of the Ezeiza Atomic Center, with doses of 7 and 10 kGy, and dose rate of 93.87 Gy/min. Dosimetric data were evaluated with potassium nitrate. Control and irradiated samples were stored at room temperature. Chemical analysis were performed to verify the Argentine Alimentary Codex specifications: water content; essence; total ash; ash insoluble in acid; alcoholic, volatile ether and non-volatile ether extracts; starch; and crude fiber. Besides, colour and volatile substances were analyzed. No differences were found between control and irradiated samples, with the exception of an increase in the total amount of volatiles released by irradiated spices, and a slight colour loss in mayoram. Microbiological determinations consisted of aerobic plate count, yeasts and moulds, coliform bacteria, Salmonella, Staphylococcus aureus, mesophilic and thermophilic sporeformers, enterococci and Clostridium perfringens. Microbial load in control samples oscillated between 10 3 and 10 6 microorganisms per gram, and was inhibited with 10 kGy to undetectable level. With 7 kGy, survivors were still detected in: cumin, anise, laurel, red pepper, fennel and paprika. So, the purpose of this work was accomplished with the dose of 10 kGy. Great improvement on the quality of those products which being stored at room temperature are consumed in the raw state, would be attained. (Author) [es

  7. Diarrhea and parasitosis in Salta, Argentina.

    Science.gov (United States)

    Aramayo, Cristian F; Gil, José F; Cruz, Mercedes C; Poma, Hugo R; Last, Michael S; Rajal, Verónica B

    2009-03-01

    Salta city is the capital of the province with the same name located in the northwest of Argentina. Its great growth over the last decade was not organized and the population expanded to occupy places where water and sanitation were not yet available. Although the Arenales River, crossing the city, receives the impact of point and non-point source pollution, the water is used for many purposes, including domestic in the poorest areas, industrial, and recreational with children as the main users. According to the World Health Organization, an estimated 24% of the global disease burden and 23% of all deaths can be attributed to environmental factors. In particular, an estimated 94% of the diarrheal burden of disease is attributable to environment, and is associated with risk factors such as unsafe drinking water and poor sanitation and hygiene. Chronic diarrhea can be caused by an infection or other etiologies; however, most of the times the etiological agent is not identified. All the cases of diarrhea and parasitosis reported during 2005 in four public health centers of the city of Salta were classified by gender and age, analyzed, and represented geographically to show areas of higher morbidity rates, which were probably related to environmental factors. Water, poor sanitation, and pollution are candidate risk factors. Diarrhea cases showed seasonality, with the highest incidence during late spring and summer, while parasitosis was persistent throughout the year. Our spatial analysis permitted us to detect the regions of higher incidence of diarrhea and parasitosis during 2005 in the area of study.

  8. Brasil y Argentina, 1990-2005

    Directory of Open Access Journals (Sweden)

    Marina Gabriela Zunino

    2008-01-01

    Full Text Available Con el objetivo de analizar la mortalidad por armas de fuego en Brasil y Argentina entre 1990 y 2005, se realizó un estudio epidemiológico descriptivo utilizando datos oficiales de mortalidad de ambos países. Se analizaron número, proporción y tasas crudas y ajustadas para cada tipo de muerte (catalogadas según la CIE-9a y CIE-10a, el total por año y el promedio anual del período, sexo y edad. Los perfiles globales de los dos países presentaron tendencia creciente, pero Brasil mostró valores superiores de muertes y homicidios por armas de fuego en todo el período. A partir de los resultados se discute la hipótesis: el perfil de Brasil, particularmente el de homicidios por armas de fuego, es consecuencia no solo de la violencia social que responde a la persistentemente alta desigualdad y exclusión en que vive gran parte de la población, sino también al surgimiento, expansión y fortalecimiento de diversos grupos armados en ese país. El perfil argentino resultaría en parte del aumento de la violencia social también como respuesta al deterioro socioeconómico imperante, y por otra parte, sería consecuencia de la histórica monopolización de la violencia por parte del Estado

  9. MOX fuel development: Experience in Argentina

    International Nuclear Information System (INIS)

    Marchi, D.E.; Adelfang, P.; Menghini, J.E.

    1999-01-01

    Since 1973, when a laboratory conceived for the safe manipulation of a few hundred grams of plutonium was built, the CNEA (Argentinean Atomic Energy Commission) has been involved in the small-scale development of MOX fuel technology. The plutonium laboratory consists in a glove box facility (α Facility) featuring the necessary equipment to prepare MOX fuel rods for experimental irradiations and to carry out studies on preparative processes development and chemical and physical characterization. The irradiation of the first prototypes of (U,Pu)O 2 fuels fabricated in Argentina began in 1986. These experiments were carried out in the HFR (High Flux Reactor)- Petten , Holland. The rods were prepared and controlled in the CNEA's a Facility. The post-irradiation examinations (PIE) were performed in the KFK (Kernforschungszentrum Karlsruhe), Germany and the JRC (Joint Research Center), Petten. In the period 1991-1995, the development of new laboratory methods of co-conversion of uranium and plutonium were carried out: reverse strike co-precipitation of ADU-Pu(OH) 4 and direct denitration using microwaves. The reverse strike process produced pellets with a high sintered density, excellent micro-homogeneity and good solubility in nitric acid. Liquid wastes showed a very low content of actinides and the process is easy to operate in a glove box environment. The microwave direct denitration was optimized with uranium alone and the conditions to obtain high density pellets, with a good microstructure, without using a milling step, have been developed. At present, new experiments are being carried out to improve the reverse strike co-precipitation process and direct microwave denitration. A new glove box is being installed at the plutonium laboratory, this glove box has process equipment designed to recover scrap from previous fabrication campaigns, and to co-convert mixed U-Pu solutions by direct microwave denitration. (author)

  10. Imaging science at El Leoncito, Argentina

    Directory of Open Access Journals (Sweden)

    C. Martinis

    2006-07-01

    Full Text Available Thermospheric and mesospheric structures are studied using an all-sky imager located at El Leoncito, Argentina (31.8° S, 69.3° W, –18° mag lat. This site has relatively high geographic latitude for a location under the crest of the equatorial ionization anomaly (EIA, and thus observations can be used to study the intrusion of several equatorial processes into the midlatitude domain. In addition, it has a conjugate point close to the field of view of our companion imager at Arecibo, PR, allowing for the study of inter-hemispheric effects. Four types of phenomena were studied using 630.0 nm and 777.4 nm observations: (1 highly-structured airglow depletions associated with the Rayleigh-Taylor instability/equatorial spread-F (RTI/ESF process, (2 brightness waves (BW associated with the midnight temperature maximum (MTM, (3 strong airglow enhancements associated with the positive phase of ionospheric storms, and (4 simple (non-structured bands of airglow depletions with characteristics matching a Perkins-like instability. Using 557.7 nm mesospheric observations, a fifth category of study deals with gravity waves probably generated by lower atmospheric disturbances, and mesospheric bores related to strong vertical temperature gradients. While ESF depletions and BW events are detected fairly frequently, the mid-latitude bands are not, and thus their successful imaging at El Leoncito offers the first example of the coupling from mid-latitudes to low-latitudes in the South American longitude sector. Preliminary results on these features are presented in this paper. Taken together, these five types of optical structures offer the opportunity to investigate coupling, both in altitude and latitude, of aeronomic processes at low latitudes in an under-sampled longitude sector in the Southern Hemisphere.

  11. Nuptial nectary structure of Bignoniaceae from Argentina

    Directory of Open Access Journals (Sweden)

    Guillermo L. Rivera

    2000-01-01

    Full Text Available Rivera, G. L. 2000. Estructura de nectarios nupciales en Bignoniaceae de Argentina.Darwiniana 38(3-4: 227-239.Se investigaron las características de los nectarios florales en 37 especies de Bignoniaceae. Se encontróun nectario nupcial asociado al eje floral en todas las especies, pudiéndose distinguir dos tipos principalesde acuerdo a su grado de desarrollo y funcionalidad: 1 vestigial y no secretor y 2 bien desarrollado ysecretor. El primero es característico de las especies de Clytostoma mientras que el segundo está presenteen el resto de las especies estudiadas. Dos variedades del tipo secretor pueden discernirse de acuerdo a suposición y forma: 1 anular, encontrado en Adenocalymma, Amphilophium, Anemopaegma, Arrabidaea,Dolichandra, Eccremocarpus, Macfadyena, Melloa, Pithecoctenium, Tabebuia, y Tecoma y 2 cilíndrico,presente en Argylia, Cuspidaria, Jacaranda, Mansoa, Parabignonia, Pyrostegia, y Tynnanthus.Anatómicamente se distinguen dos tejidos: 1 una epidermis monoestratificada, cubierta por una cutículay con un número variable de estomas y 2 un tejido secretor compuesto por células parenquimáticasdispuestas en forma compacta. Tanto el tamaño del nectario como la relación nectario/ovario fueusualmente más grande en lianas (Bignoniaceae que en árboles (Tecomeae. El tipo de nectario fueinvariable entre las especies de un mismo género, pero no así entre los géneros de una misma tribu. Lascaracterísticas de los nectarios analizados en este estudio como la vascularización, la presencia detricomas y el tipo de nectario fueron constantes en las especies analizadas, adquiriendo por lo tanto unimportante valor taxonómico

  12. Development of tool for optimization in the measurement of solar radiation; Desarrollo de herramientas para la optimizacion en la medicion de la radiacion solar

    Energy Technology Data Exchange (ETDEWEB)

    Adaro, J.; Quiroga, D.; Fasulo, A.; Lema, A.

    2004-07-01

    One of the most important requirements to make a project of rational use of solar energy is the precise knowledge of the temporal-spatial distribution of the solar resource on the terrestrial surface. For that reason, the Solar Energy Group at the National University of Rio Cuarto in Argentina, is measuring and recording data of global and direct solar radiation. Many possibilities of different kinds of errors there exist in this process, but the most significant problem is the lack of data. Then, it would be necessary to have a methodology that indicates what to do in this situation, and for that reason, this work performs an study about the data processing of the obtained measurements to infer values to be incorporated to the series in situations where the data are lost. To incorporate lost data, the Time Series Analysis based in spatial state models were used. (Author)

  13. Solar cities

    International Nuclear Information System (INIS)

    Roaf, S.; Fuentes, M.; Gupta, R.

    2005-01-01

    Over the last decade, climate change has moved from being the concern of few to a widely recognized threat to humanity itself and the natural environment. The 1990s were the warmest decade on record, and ever-increasing atmospheric levels of greenhouse gases such as carbon dioxide (CO/sub 2/), could, if left unchecked lead to serious consequences globally, including increased risks of droughts, floods and storms, disruption to agriculture, rising sea levels and the spread of disease. The contribution of anthropogenic emissions of carbon dioxide has been recognized as the principal cause of the atmospheric changes that drive these climate trends. Globally, buildings are the largest source of indirect carbon emissions. In 2000, the UK Royal Commission on Environmental Pollution estimated that in order to stabilise carbon emissions at levels, which avoid catastrophic alterations in the climate, we would have to reduce emissions from the built environment by at least 60% by 2050 and 80% by 2100 relative to 1997 levels. Studies of the Oxford Ecohouse have demonstrated that it is not difficult to reduce carbon emissions from houses by 60% or more through energy efficiency measures, but it is only possible to reach the 90% level of reductions required by using renewable energy technologies. Solar energy technologies have been the most successfully applied of all renewable to date largely because they are the only systems that can be incorporated easily into the urban fabric. In addition, the short fossil fuel horizons that are predicted (c. 40 years left for oil and 65 years for gas) will drive the markets for solar technologies. For these reasons, the cities of the future will be powered by solar energy, to a greater or lesser extent, depending on the city form and location. In recognition of the need to move rapidly towards a renewable energy future, a group of international cities, including Oxford, have started the Solar City Network. In this paper we outline the

  14. Early solar physics

    CERN Document Server

    Meadows, A J

    1970-01-01

    Early Solar Physics reviews developments in solar physics, particularly the advent of solar spectroscopy and the discovery of relationships between the various layers of the solar atmosphere and between the different forms of solar activity. Topics covered include solar observations during 1843; chemical analysis of the solar atmosphere; the spectrum of a solar prominence; and the solar eclipse of December 12, 1871. Spectroscopic observations of the sun are also presented. This book is comprised of 30 chapters and begins with an overview of ideas about the sun in the mid-nineteenth century, fo

  15. Nuevas citas de Coleoptera acuáticos y Megaloptera para la provincia de Chubut (Argentina New records of aquatic Coleoptera and Megaloptera from Chubut province (Argentina

    Directory of Open Access Journals (Sweden)

    Miguel Archangelsky

    2004-12-01

    Full Text Available Se informa acerca de nuevos hallazgos de coleópteros acuáticos, de Dytiscidae, Gyrinidae, Hydrophilidae y Elmidae para la provincia de Chubut (Argentina. También se cita por primera vez a las Sialidae (Megaloptera, género Protosialis Weele, para la República Argentina.New records of aquatic Coleoptera, in the families Dytiscidae, Gyrinidae, Hydrophilidae and Elmidae, are reported for the Chubut province (Argentina. The Sialidae (Megaloptera, genus Protosialis Weele, is reported for the first time in Argentina.

  16. Solar solution

    International Nuclear Information System (INIS)

    Shi Zhengrong

    2009-01-01

    China is facing enormous energy challenges. Everyone seems to know that we need to increase our energy supply by the equivalent of one power plant per week to support China's economic growth, which is allowing millions of people to enjoy better standards of living. Much less is known of the extent to which China has taken steps to mitigate the impact of that growing energy demand through incentives for greater efficiency and renewable energy. Policies include: Cutting energy intensity - 20 per cent between 2005 and 2010, saving five times as much CO 2 as the EU's goals. Cutting major pollutants by 10 per cent by 2010. Setting one of the world's most aggressive renewable energy standards: 15 per cent of national energy from renewables by 2020. Setting targets of 300 megawatts of installed solar by 2010, and 1.8 gigawatts by 2020, in the 2007 National Development and Reform Commission Renewable Energy Development Plan. Dedicating $180 billion for renewable energy by 2020. Imposing energy efficiency targets for the top 1,000 companies, a measure with greater carbon savings potential than most Western initiatives. Establishing building energy codes in all regions and extensive efficiency standards for appliances, which will be particularly important as China continues to grow. Targeting new buildings in major cities like Beijing, Shanghai and Chongqing, to achieve 65 per cent greater energy efficiency than local codes require. Closing thousands of older, smaller, dirtier power plants by 2010. China understands the economic development potential in clean energy technologies. Even the noted journalist Thomas Friedman has remarked that 'China is going green in a big way,' using domestic demand for cleaner energy to build low-cost, scalable green technologies. Suntech Power Holdings - now the world's largest solar photovoltaic (PV) module manufacturer, with operations around the globe - was just one of dozens of solar companies that realised the opportunity provided by

  17. Solar energy collector

    Science.gov (United States)

    Brin, Raymond L.; Pace, Thomas L.

    1978-01-01

    The invention relates to a solar energy collector comprising solar energy absorbing material within chamber having a transparent wall, solar energy being transmitted through the transparent wall, and efficiently absorbed by the absorbing material, for transfer to a heat transfer fluid. The solar energy absorbing material, of generally foraminous nature, absorbs and transmits the solar energy with improved efficiency.

  18. Solar Pumping : The Basics

    OpenAIRE

    World Bank Group

    2018-01-01

    Solar photovoltaic water pumping (SWP) uses energy from solar photovoltaic (PV) panels to power an electric water pump. The entire process, from sunlight to stored energy, is elegant and simple. Over last seven years, the technology and price of solar pumping have evolved dramatically and hence the opportunities it presents. Solar pumping is most competitive in regions with high solar inso...

  19. Solar constant values for estimating solar radiation

    International Nuclear Information System (INIS)

    Li, Huashan; Lian, Yongwang; Wang, Xianlong; Ma, Weibin; Zhao, Liang

    2011-01-01

    There are many solar constant values given and adopted by researchers, leading to confusion in estimating solar radiation. In this study, some solar constant values collected from literature for estimating solar radiation with the Angstroem-Prescott correlation are tested in China using the measured data between 1971 and 2000. According to the ranking method based on the t-statistic, a strategy to select the best solar constant value for estimating the monthly average daily global solar radiation with the Angstroem-Prescott correlation is proposed. -- Research highlights: → The effect of the solar constant on estimating solar radiation is investigated. → The investigation covers a diverse range of climate and geography in China. → A strategy to select the best solar constant for estimating radiation is proposed.

  20. Solar light induced removal of arsenic from contaminated groundwater: the interplay of solar energy and chemical variables

    Energy Technology Data Exchange (ETDEWEB)

    Garcia, M.G.; D' Hiriart, J.; Giullitti, J.; Hidalgo, M. del V. [Universidad Nacional de Tucaman (Argentina). Centro de Investigaciones y Transferencia en Quimica Aplicada; Lin, H.; Custo, G.; Litter, M.I. [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Unidad de Actividad Quimica; Blesa, M.A. [Comision Nacional de Energia Atomica, Buenos Aires (Argentina). Unidad de Actividad Quimica; Universidad Nacional de General San Martin (Argentina)

    2004-11-01

    The removal of arsenic by solar oxidation in individual units (SORAS) is currently being explored as a possible economic and simple technology to treat groundwater in Bangladesh and India. Hydroarsenicism affects also large regions of America, especially Argentina, Chile, Mexico and Peru. In this paper, the efficiency of arsenic removal by solar oxidation coupled with precipitation of iron (hydr)oxide, was assessed under various experimental conditions, both on samples of synthetic water and of groundwater of the province of Tucuman (Argentina). The results demonstrate that the underlying chemistry is very complex, and the efficiency is affected often in unpredictable ways by changes in the chemical matrix, or by changes in the operative conditions. Oxides generated from ferrous salts are more efficient than solids formed by hydrolysis of Fe(III); alkalinity contents (bicarbonate) is also important to permit the adequate precipitation. Addition of small amounts of citric acid (lemon juice) is beneficial, but at larger concentrations the effect is negative, probably because of interference in the formation of the solid. The effect of solar irradiation is variable, depending on the other experimental conditions. Although it is possible to remove As partially without solar irradiation under certain special conditions, a procedure versatile enough to cope with waters of different compositions must be based in the use of solar energy. Light plays the role of accelerating the oxidation of As(III) to As(V), and also affects the nature of the solid and, hence, its sorptive properties. The rationale of the effect of light is therefore appreciably more complex than in the case of heterogeneous photocatalysis with TiO{sub 2}. (Author)

  1. Oppression in Argentina: The Mataco Case. IWGIA Document No. 21.

    Science.gov (United States)

    Rodriguez, Nemesio J.

    The Mataco Indians are members of the Mataco-Mataguayo family which included several different groups that to some extent were related culturally speaking. According to the National Indigenous Census, there are 21,800 Mataco in Argentina today. The six Mataco settlements, situated in the land belt which extends from Pozo del Mortero to Laguna Yema…

  2. Argentina: An emerging marketer is set to sell itself

    International Nuclear Information System (INIS)

    Anon.

    1997-01-01

    The nuclear industry in Argentina is outlined in the article. A brief history of the industry's transformation from a federal to a private enterprise is presented. Information on fuel cycle facilities for uranium production, uranium dioxide production, zircalloy turbine production, nuclear fuel fabrication, and heavy water production is provided. Other topics presented include spent fuel storage, technology marketing, industry restructuring, and bilateral weapons agreements

  3. The naturalization of "loquat", Eriobotrya japonica (Rosaceae, Maloideae in Argentina

    Directory of Open Access Journals (Sweden)

    Gustavo Deluchi

    2010-01-01

    Full Text Available Based on herbarium specimens collected in our country, Eriobotrya japonica(Thunb. Lindl. (Rosaceae is mentioned for the first time as naturalized plant in Argentina. Ecological observations and information about various local uses are included. The species is described and illustrated.

  4. Development of new nuclear power plant in Argentina. Annex 9

    International Nuclear Information System (INIS)

    Mutsumi, V.; Fukami, I.

    2002-01-01

    Argentina has started the design of its own nuclear power, CAREM. The CAREM is an indirect cycle reactor with some distinctive features that greatly simplify the reactor and also contribute to a higher level of safety: integrated primary cooling system, primary cooling by natural circulation, self-pressurised primary system and safety systems relying on passive features. (author)

  5. Declaration of the Government of Argentina regime for sensitive exports

    International Nuclear Information System (INIS)

    1992-05-01

    The document reproduces the Declaration of the Government of Argentina concerning the new regime for foreign sales of any materials, equipment, technology, technical assistance and services relating to nuclear or missile technology, and of chemical substances which might be used in the production and deployment of missiles and nuclear, chemical and bacteriological weapons

  6. English Language Education in Primary Schooling in Argentina

    Science.gov (United States)

    Porto, Melina

    2016-01-01

    This article describes public primary English language education in Argentina. I begin with background information about the country and a brief historical overview of education in general, accompanied by a portrait of primary schooling in particular. This overview involves local, political and economic considerations but also international…

  7. Phenomenal Justice : State Violence, Emotion, and the Law in Argentina

    NARCIS (Netherlands)

    van Roekel, E.

    2016-01-01

    This ethnography is about the trials for crimes against humanity in Argentina, which belong to complex social processes dealing with the human rights crimes that were committed during the last dictatorship that ruled from 1976-1983. In academic debates the term ‘transitional justice’ is often used

  8. Argentina: Corrupción, dependencia y medios

    Directory of Open Access Journals (Sweden)

    Alicia Simeoni

    2015-01-01

    Full Text Available Señala la autora que los medios con factores de poder pero no son parte del poder mismo. Analiza la corrupción en el gobierno de Menem (1989 Argentina, el caso Swiftgate y más hechos de corrupción.

  9. Pilot Project Using ICTs to Monitor Chagas' Disease in Argentina ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Argentina, South America, Bolivia, Brazil, North and Central America ... the annual conference of McGill's Institute for the Study of International Development. ... Special journal issue highlights IDRC-supported findings on women's paid work ... in India, including heat stress, water management, and climate-related migration.

  10. IQ Gains in Argentina between 1964 and 1998

    Science.gov (United States)

    Flynn, James R.; Rossi-Case, Lilia

    2012-01-01

    The literature on IQ gains in Latin America is sparse. We estimate gains on Raven's Progressive Matrices in the city of La Plata (Argentina) between 1964 and 1998. The gains are robust at the top of the curve as well as at the bottom. Therefore, they are contrary to the hypothesis that nutrition played a major role in recent Argentine IQ gains.…

  11. An evolutionary approach to mania studying Sardinian immigrants to Argentina.

    Science.gov (United States)

    Carta, Mauro G; Perra, Alessandra; Atzeni, Michela; D'Oca, Silvia; Moro, Maria F; Kurotschka, Peter K; Moro, Daniela; Sancassiani, Federica; Minerba, Luigi; Brasesco, Maria V; Mausel, Gustavo; Nardi, Antonio E; Tondo, Leonardo

    2017-01-01

    To ascertain lifetime prevalence of positivity to a screening questionnaire for bipolar disorders (BD) in Sardinian immigrants to Argentina and residents of Sardinia and assess whether such positivity affects quality of life (QoL) in either group. Our hypothesis is that screen positivity for BD may be more frequent in immigrants. Observational study. Subjects were randomly selected from the membership lists of associations of Sardinian immigrants in Argentina. A study carried out in Sardinia using the same methodology was used for comparison. The Mood Disorder Questionnaire was used to screen for mania/hypomania and the Short-Form Health Survey-12 to measure QoL. A higher prevalence of manic/hypomanic episodes was found in Sardinian immigrants to Argentina (p immigrants to Argentina and in residents of Sardinia. To the best of our knowledge, this is the first study to show a higher lifetime prevalence of manic/hypomanic episodes in a general-population sample of individuals who migrated to a foreign country. Our results are in agreement with the hypothesis that hyperactive/novelty-seeking features may represent an adaptive substrate in certain conditions of social change.

  12. Horticulture in Argentina: a productive alternative with great potential

    Directory of Open Access Journals (Sweden)

    Ana Maria Castagnino

    2011-12-01

    Full Text Available Horticulture in Argentina is an activity with great potential whose history has mainly been driven by Italian immigrants who arrived during the last two centuries. It is a valuable complement for traditional primary productions on which the country is focused with more than 30 millions of cultivated hectares and different agro-climatic conditions that characterize the different horticultural regions distributed throughout the country. The aim of this article is to give a panorama of the history, reality and perspectives in Argentina of an activity that is an opportunity for producers and entrepreneurs interested in it. Due to its characteristics, horticulture generates and dynamizes employment with great importance for regional economies. The proportion between vegetables and fruit produced and commercialized in Argentina is 63 and 34% respectively. Horticultural products for exportation largely are garlic, onion and beans. Concerning the most commercialized vegetables in Argentina, potato, tomato, onion, squash, lettuce, pepper, marrow and sweet potato stand out, whereas orange, tangerine, apple, banana, lemon, pear, grape and grapefruit may be highlighted among fruit. At present, the main challenge of the Argentinian horticultural sector is given not only by the possibilities of productive diversification and the expansion of the productive area but also of the technological level optimization, the application of quality norms and the agro-industry growth.

  13. Argentina : tous les projets | Page 3 | CRDI - Centre de recherches ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Sujet: NUTRITION POLICY, SODIUM, Disease control, FATS, FOOD INDUSTRY, SOUTH AMERICA. Région: Argentina, South America, North and Central America. Programme: Alimentation, environnement et santé. Financement total : CA$ 431,600.00. Incidence des prix et des taxes sur la consommation de produits du ...

  14. Progress of Grid technology in Argentina: Lessons learned from EELA

    International Nuclear Information System (INIS)

    Dova, M. T.; Grunfeld, C.; Monticelli, F.; Tripiana, M.; Veiga, A.; Ambrosi, V.; Barbieri, A.; Diaz, J.; Luengo, M.; Macia, M.; Molinari, L.; Veonosa, P.; Zabaljauregui, M.

    2007-01-01

    The EELA project aimed to create a collaboration network between Europe and Latin American for training in Grid technologies and the deployment of a pilot Grid infrastructure for e-science applications. Grid computing has emerged as an important new field, and its development in Argentina is particularly important for a number of reasons, such as that Argentina has recently joined the ATLAS collaboration at CERN and the increasing interest in future biomedical applications. The potential of GRID technology is well known, however, its adoption is not a trivial task as it requires significant investment in several areas. In this paper, the achievements and progress in Argentina through close collaboration with EELA are presented. Among these are the deployment of a Grid Certification Authority infrastructure that is a crucial component in the activities of the e-Science community in the country; the deployment, integration and validation of a small local EELA node; installation and running of an analysis ATLAS application on the EELA infrastructure. The experience gained in participating in EELA dissemination events also allowed us to actively promote the GRID and training for its use different target audiences in Argentina and in LA. (Author)

  15. LAS ESPECIES DE MUHLENBERGIA (POACEAE: CHLORIDOIDEAE DE ARGENTINA

    Directory of Open Access Journals (Sweden)

    Peterson Paul

    2011-06-01

    Full Text Available Se presenta un estudio taxonómico de las especies nativas argentinas del géneroMuhlenbergia, basado en el análisis de los especímenes depositados en 48 herbarios.Se analizan diversos aspectos relativos a la clasifi cación, la nomenclatura y lavariación morfológica de los caracteres. Muhlenbergia está representado enArgentina por 18 especies nativas. Se proporcionan claves para reconocer lasespecies presentes en el país, así como también descripciones de éstas, sinónimos,ilustraciones, distribución geográfica y algunos comentarios morfológicos yecológicos. Muhlenbergia breviaristata (Hack. Parodi y Muhlenbergia holwayorumHitchc., se reducen como sinónimos del híbrido Muhlenbergia angustata (J. PreslKunth × M. rigida (Kunth Kunth. Muhlenbergia diversiglumis Trin. se cita porprimera vez para la Argentina. Por otra parte, las especies Muhlenbergia tenella(Kunth Trin. y Muhlenbergia tenuissima (J. Presl Kunth se excluyen de la fl orade Argentina.

  16. Regulatory framework for the management of radioactive wastes in Argentina

    International Nuclear Information System (INIS)

    D'Amato, E.; Siraky, G.; Petraitis, E.; Novo, R.

    2000-01-01

    The legal and regulatory framework within which the radioactive waste management is carried out in Argentina are exposed. The activities of the Nuclear Regulatory Authority (ARN) in relation to facility inspections, safety assessments and collaboration with international agencies in the matter are also presented. Further, the regulatory criteria applied to waste management are reported. (author)

  17. Burnout, Perceived Stress, and Depression among Cardiology Residents in Argentina

    Science.gov (United States)

    Waldman, Silvina V.; Diez, Juan Cruz Lopez; Arazi, Hernan Cohen; Linetzky, Bruno; Guinjoan, Salvador; Grancelli, Hugo

    2009-01-01

    Objective: Because medical residency is a stressful time for training physicians, placing residents at increased risk for psychological distress, the authors studied the prevalence of burnout, perceived stress, and depression in cardiology residents in Argentina and examined the association between sociodemographic characteristics and these…

  18. Communication received from the Resident Representatives of Argentina and Brazil

    International Nuclear Information System (INIS)

    1993-01-01

    The document reproduces the communication received by the Director General from the Resident Representatives of Argentina and Brazil to the Agency to inform him about the official inauguration on 9 December 1992 of the headquarters of the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials (ABACC) in Rio de Janeiro

  19. Transport of Co-60 from Argentina to abroad

    International Nuclear Information System (INIS)

    Cesario, R.; Pinamonti, M.

    1993-01-01

    The Co-60 bearing wastes from the Embalse Nuclear Power Plant, Argentina are transported to Canada, the United States and Mexico. Ocean transportation, terrestrial transportation, air transportation are applied, and the total activity in bulk material shipped reached 2.96x10 17 Bq. (J.P.N.)

  20. Dengue Virus 1 Outbreak in Buenos Aires, Argentina, 2016.

    Science.gov (United States)

    Tittarelli, Estefanía; Lusso, Silvina B; Goya, Stephanie; Rojo, Gabriel L; Natale, Mónica I; Viegas, Mariana; Mistchenko, Alicia S; Valinotto, Laura E

    2017-10-01

    The largest outbreak of dengue in Buenos Aires, Argentina, occurred during 2016. Phylogenetic, phylodynamic, and phylogeographic analyses of 82 samples from dengue patients revealed co-circulation of 2 genotype V dengue virus lineages, suggesting that this virus has become endemic to the Buenos Aires metropolitan area.

  1. Television Food Advertising to Children in Argentina | CRDI - Centre ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    This research project will first analyze the current regulatory framework around television food advertising in Argentina, determining the amount and ... the relationship between exposure to television advertising and childhood obesity among Argentinean children, and promote the changes required to reduce their exposure ...

  2. Solar neutrino

    Energy Technology Data Exchange (ETDEWEB)

    Sugimoto, D [Tokyo Univ. (Japan). Coll. of General Education

    1975-01-01

    The measurement of solar neutrino was performed by using the reaction /sup 37/cl+..nu..sub(e)..-->../sup 37/Ar+e/sup -/ by Davis et al. The argon gas produced through the above mentioned reaction in a tank containing 610 ton of C/sub 2/Cl/sub 4/ was collected and measured. The rate of production of /sup 37/Ar was 0.13+-0.20/day, and the net production rate by the solar neutrino was 0.06+-0.20/day, being corrected for background. This value corresponds to 0.5+-1.0 SNU. Theoretical calculation with the model of spherically symmetric solar development gave an expected value of 5.6 SNU, which is in contradiction with the experimental value. Reason of this discrepancy was considered. The possibility of decay of neutrino to the other particles with weak interaction is very slight. Various models of the sun were investigated, but the results were still inconsistent with the experiment. The mixing of matters in the sun may cause the reduction of neutrino. If He gas comes to the center of the sun by mixing, the reaction, /sup 3/He+/sup 3/He, progresses excessively at the center, and it produces the expansion of the core of the sun. Then, the temperature drops and the neutrino is reduced. Various models which can explain the neutrino of less than ISNU have been presented. However, other theory says that the reduction of neutrino is not expected even if the mixing is considered. A problem concerning the mixing is whether the thermal instability which causes the mixing exists. (Kato, T.).

  3. Radionuclide Activity Concentrations in Spas of Argentina

    International Nuclear Information System (INIS)

    Gnoni, G.; Czerniczyniec, M.; Palacios, M.

    2011-01-01

    Geothermal waters have been used on a large scale for bathing, drinking and medical purposes. These waters often have a very high mineral content because solubility increases with temperature. Ground waters are in close contact with soil and rocks containing radium. Once formed by decay from radium, radon gas (Rn-222) may diffuse through rocks pores and geological discontinuities and may dissolve in these waters. Radon and other natural radionuclides are transported to the surface where radon can easily diffuse into the atmosphere. Then it may be possible to find out significant radon levels at places like geothermal spas. In this work the most important natural radionuclide activity concentrations in different thermal spas of Argentina were measured to characterize waters and to evaluate the exposure of workers and members of the public. Three passive methods were used to measure radon in air. One of them is an screening method based on the radon adsorption on activated charcoal. The other two methods are time integrated ones, CR-39 or Makrofol tracks detectors, which can be exposed between two and three months. To characterize waters other natural radionuclides have been also measured. Uranium concentration was measured by fluorimetry. Ra-226 and Pb-210 measurements were performed by radiochemical methods and liquid scintillation. The results obtained were compared with the guidelines values recommended by WHO and EPA for drinking waters and, in the case of radon in air, the results were compared with values established by BSS-115. In order to assess worker doses, the higher value measured for radon in air and real scenario data were taken into account. Moreover, in situ dose rate measurements were also performed and then compared with natural background values. In relation with water characterization, almost all values obtained for the geothermal waters analyzed were below the corresponding guidance levels. Taking into account the highest value measured of radon

  4. New detailed holocene paleomagnetic records with anomalous geomagnetic field behavior in Argentina Nuevos registros paleomagnéticos holocenos detallados con comportamiento anómalo del campo magnético terrestre en Argentina

    Directory of Open Access Journals (Sweden)

    Hugo G Nami

    2012-12-01

    Full Text Available Detailed palaeomagnetic studies were performed in several archaeological and geological sections dated with diverse relative and absolute methods. Data from 360 cores obtained in eight sites across eastern Argentina are reported. Characteristic remanence magnetization directions were determined by progressive alternating field demagnetization. Remanence directions showed anomalous geomagnetic field behavior far from the present magnetic field bearing oblique normal, oblique reverse and reverse polarities for the latest Pleistocene and Holocene, as well as evidence of possible field excursions recorded in several stratigraphic sections spanning ~11-0.5 kya. Computed virtual geomagnetic poles from those directions tend to be concentrated over North America, Europe, Eastern Asia, Africa and Australia. The hypothesis of the anomalous geomagnetic field directions is probably related with 14C fluctuations and solar activity.Se realizaron estudios paleomagnéticos detallados en varias secciones sedimentarias arqueológicas y geológicas fechadas con diversos métodos de datación absoluta y relativa. Se reportan resultados obtenidos de 360 muestras recogidas en ocho sitios localizados en el este de Argentina. La magnetización remanente característica fue determinada por desmagnetización progresiva utilizando campos alternos. Las direcciones remanentes mostraron conductas anómalas del campo geomagnético lejanas al campo actual mostrando polaridades oblicuas normales, oblicuas reversas y reversas con evidencia de posibles excursiones geomagnéticas registradas en varias secciones con un lapso temporal de ~11-0.5 kya. Los polos geomagnéticos virtuales computados a partir de las direcciones tienden a concentrarse sobre Norteamérica, Europa, Este de Asia, África y Australia. Se discute la hipótesis que la conducta anómala del campo magnético terrestre probablemente se relacione con las fluctuaciones de la producción de 14C y la actividad solar.

  5. Solar Energy Systems

    Science.gov (United States)

    1984-01-01

    Calibrated in kilowatt hours per square meter, the solar counter produced by Dodge Products, Inc. provides a numerical count of the solar energy that has accumulated on a surface. Solar energy sensing, measuring and recording devices in corporate solar cell technology developed by Lewis Research Center. Customers for their various devices include architects, engineers and others engaged in construction and operation of solar energy facilities; manufacturers of solar systems or solar related products, such as glare reducing windows; and solar energy planners in federal and state government agencies.

  6. Mobile Solar Tracker Facility

    Data.gov (United States)

    Federal Laboratory Consortium — NIST's mobile solar tracking facility is used to characterize the electrical performance of photovoltaic panels. It incorporates meteorological instruments, a solar...

  7. Primer registro de Vespula vulgaris (Hymenoptera: Vespidae en la Argentina First record of Vespula vulgaris (Hymenoptera: Vespidae in Argentina

    Directory of Open Access Journals (Sweden)

    Maité Masciocchi

    2010-12-01

    Full Text Available Vespula vulgaris (Linnaeus es un véspido social nativo de la región Holártica. En este trabajo reportamos la primera detección de esta especie en Argentina. Obreras de esta avispa fueron capturadas cerca de la ciudad de San Carlos de Bariloche (Argentina en Febrero de 2010, mientras se tomaban muestras de otra avispa invasora, Vespula germanica (Fabricius o chaqueta amarilla, de morfología externa y hábitos similares a la anteriormente mencionada. Además, detallamos algunos caracteres de identificación y características biológicas.Vespula vulgaris (Linnaeus is a social vespid native to the Holarctic region. The first detection of this species in Argentina is here reported. Workers were captured close to San Carlos de Bariloche (Argentina during February 2010, while sampling for another successful invader, the German wasp or Yellowjacket, Vespula germanica (Fabricius. Both these wasp species are very similar morphologically and share a number of common habits. Also, some identification features and biological characters are here explained.

  8. Solar Club

    CERN Multimedia

    Solar Club

    2010-01-01

    Le CERN Solar-Club vous invite à la présentation de sa participation dans : The Cyprus Institute Solar Car Challenge du 18 au 20 juin à Chypre . en réponse à l’invitation dudit institut, dans le cadre de la demande de Chypre pour joindre le CERN . Le Club y participera avec son vénérable Photon rénové , et la Dyane E-Solaire d’un de ses membres, rénové aussi . Après la présentation, le forum est ouvert pour toutes vos questions et propositions diverses, également dans d’autres domaines des énergies renouvelables . C’est aussi l’occasion pour joindre le Club ! Où, et Quand ? Le Mercredi 7 Avril à 19 h 00, au 6ème étage du Bât. Principal, (60-6-015) à la suite de l’AG des membres du Club , à 18h00 dans...

  9. Panorama de la familia Asteraceae (= Compositae en la Republica Argentina An overview of the plant family Asteraceae ( = Compositae in Argentina

    Directory of Open Access Journals (Sweden)

    Liliana Katinas

    2007-07-01

    Full Text Available Se presenta un panorama de la familia Asteraceae en la República Argentina , que incluye una breve historia taxonómica, datos numéricos de tribus, géneros y especies, ejemplos de endemismos y daptaciones ecológicas y una reseña sobre la hipótesis del origen de la familia en Patagonia. En la Argentina, las asteráceas representan la familia más numerosa con 227 géneros (cinco son endémicos y ca. 1400 especies (92 son adventicias y 382 son endémicas. En términos de taxones nativos, se hallan representadas en nuestro país todas las tribus de Asteraceae excepto Inuleae (sensu Bremer. Las tribus Arctoteae y Calenduleae están representadas por taxones adventicios exclusivamente y Cardueae posee sólo una especie nativa. Barnadesieae y Mutisieae son las únicas tribus con géneros endémicos de Argentina y también presentan el porcentaje más alto de géneros y especies en el país en comparación con el resto de las tribus. El mayor número de especies nativas, endémicas y no endémicas, se da en las provincias fitogeográficas Altoandina y Patagónica. La tribu más representada en número de géneros es Heliantheae, y en número de especies nativas es Senecioneae.An overview of the family Asteraceae in Argentina that includes a brief taxonomic history, numerical data of tribes, genera and species, examples of endemisms and ecological adaptations, and a discussion on the hypothesis on the origin of the family in Patagonia is given. Asteraceae is the most numerous family in Argentina , with 227 genera (five are endemic and ca. 1400 species (92 are adventitious and 382 are endemic. In relation to the native taxa, all tribes of Asteraceae occur in Argentina excepting Inuleae (sensu Bremer. Tribes Arctoteae and Calenduleae are represented exclusively by adventitious taxa, and Cardueae has only one native species. Barnadesieae and Mutisieae are the only tribes with endemic genera in Argentina and they also present the highest percentage of

  10. Solar Innovation Infographic | Solar Research | NREL

    Science.gov (United States)

    Innovation Infographic Solar Innovation Infographic Scientists have been working to harness power from the sun for about 200 years. Over the past 40 years, solar energy technologies have made research developments and industry milestones that helped shape our U.S. solar industry. Infographic Embed

  11. Midscale Commercial Solar Market | Solar Research | NREL

    Science.gov (United States)

    States To help prospective solar customers understand and use the policies of their state for midsized Customers, which equips prospective solar customers with the tools necessary to understand and use the solar corporate customers (Alabama Power's Renewable Procurement Program), and a company with approval to sell

  12. Solar neutrinos and nonradial solar oscillations

    International Nuclear Information System (INIS)

    Zatsepin, G.T.; Gavryuseva, E.A.; Kopysov, Yu.S.

    1980-01-01

    The problem of origin of surface solar oscillations is considered. It is assumed that generation of oscillations is performed by the solar nucleus. The necessary excitation condition for gravitational oscillations of the solar nucleus is a sharp decrease of the oscillation amplitude outside the nucleus, where the nuclear reaction rates are small and only radiation losses are considerable. It is shown that the specific singularities of gravitational wave propagation in solar entrails permit to attain a significant reduction of the oscillation amplitude. The solar entrails can serve as an effective trap for gravitational waves, if the substance of the solar nucleus is close to the state of convectional equilibrium. In order that the g 1 quadrupole mode of the solar nucleus has a period of 2h 40 min and sharply decreases in the solar mantle, it is enough that only the external part of the solar nucleus is close to the state of convectional equilibrium. Closeness of the solar nucleus to the state of convectional equilibrium is an argument in favour of its periodic mixing. Periodic mixing of the solar nucleus can serve as a cause of a low counting rate of solar neutrinos in R.Davis chlorous detector

  13. Solar energy an introduction

    CERN Document Server

    Mackay, Michael E

    2015-01-01

    Solar Energy presents an introduction to all aspects of solar energy, from photovoltaic devices to active and passive solar thermal energy conversion, giving both a detailed and broad perspective of the field. It is aimed at the beginner involved in solar energy or a related field, or for someone wanting to gain a broader perspective of solar energy technologies. A chapter considering solar radiation, basic principles applied to solar energy, semiconductor physics, and light absorption brings the reader on equal footing with the technology of either solar generated electrical current or useful heat. Details of how a solar cell works and then production of current from a photovoltaic device is discussed. Characterization of a solar cell is examined, allowing one the ability to interpret the current-voltage relation, followed by discussion of parameter extraction from this relation. This information can be used to understand what limits the performance of a given solar cell with the potential to optimize its pe...

  14. Difilobotriasis humana en la Patagonia, Argentina Human diphyllobothriasis in Patagonia, Argentina

    Directory of Open Access Journals (Sweden)

    Liliana Semenas

    1997-06-01

    Full Text Available OBJETIVO: El objetivo del trabajo fué detectar hospedadores humanos en la zona andino patagónica argentina, teniendo en cuenta las prácticas de pesca desportiva y la importancia de los salmónidos dentro de la zona. MATERIAL Y METODO: Entre 1986 y 1995 se implementaron Campañas de Información en los laboratorios de Análisis Clínicos de la región andinopatagónica argentina, destinadas a lograr una detección más eficiente de la difilobotriasis, a través de análisis coproparasitológicos. RESULTADOS: Adicionalmente, se confeccionaron planillas destinadas a recoger información sobre las características de la infección, del tratamiento y del paciente. Durante este período se detectaron 13 nuevos casos humanos, por identificación directa del parásito o por la presencia de huevos en materia fecal. Las características de las infecciones responden a las descriptas para el género Diphyllobothrium. CONCLUSIONES: En la región, los salmónidos son los peces predilectos en la pesca deportiva. Estos peces, frecuentemente parasitados con larvas, constituyen la principal fuente de contagio para el hombre al ser consumidos insuficientemente cocidos o ahumados en frío.OBJECTIVE: In view of the amateur fishing practices and the importance of salmonids in the region the study sets out to detect human hosts in the Andean-Patagonian zone. MATERIAL AND METHOD: Information campaigns were carried out by Clinical Analysis Laboratories of Andean Patagonia between 1986 and 1995 to detect diphyllobothriasis more efficiently by means of coproparasitological analysis. RESULTS: Further, forms were prepared for the collection of information about infection, treatment and the characteristics of the human host. During this period 13 new cases were registered either through direct identification of the parasite or through the presence of eggs in the faeces. The characteristics of infection are similar to those described for the genus Diphyllobothrium

  15. EDITORIAL Solar harvest Solar harvest

    Science.gov (United States)

    Demming, Anna

    2010-12-01

    The first observations of the photoelectric effect date back to the early 19th century from work by Alexandre Edmond Becquerel, Heinrich Hertz, Wilhelm Hallwachs and J J Thomson. The theory behind the phenomena was clarified in a seminal paper by Einstein in 1905 and became an archetypical feature of the wave-particle description of light. A different manifestation of quantised electron excitation, whereby electrons are not emitted but excited into the valence band of the material, is what we call the photoconductive effect. As well as providing an extension to theories in fundamental physics, the phenomenon has spawned a field with enormous ramifications in the energy industry through the development of solar cells. Among advances in photovoltaic technology has been the development of organic photovoltaic technology. These devices have many benefits over their inorganic counterparts, such as light-weight, flexible material properties, as well as versatile materials' synthesis and low-cost large-scale production—all highly advantageous for manufacturing. The first organic photovoltaic systems were reported over 50 years ago [1], but the potential of the field has escalated in recent years in terms of efficiency, largely through band offsetting. Since then, great progress has been made in studies for optimising the efficiency of organic solar cells, such as the work by researchers in Germany and the Netherlands, where investigations were made into the percentage composition and annealing effects on composites of poly(3-hexylthiophene) (P3HT) and the fullerene derivative [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) [2]. Hybrid devices that aim to exploit the advantages of both inorganic and organic constituents have also proven promising. One example of this is the work reported by researchers in Tunisia and France on a systematic study for optimising the composition morphology of TiO2 nanoparticles in poly(N-vinylcarbazole) (PVK), which also led to insights

  16. Solar flares

    International Nuclear Information System (INIS)

    Zirin, H.

    1974-01-01

    A review of the knowledge about solar flares which has been obtained through observations from the earth and from space by various methods is presented. High-resolution cinematography is best carried out at H-alpha wavelengths to reveal the structure, time history, and location of flares. The classification flares in H alpha according to either physical or morphological criteria is discussed. The study of flare morphology, which shows where, when, and how flares occur, is important for evaluating theories of flares. Consideration is given to studies of flares by optical spectroscopy, radio emissions, and at X-ray and XUV wavelengths. Research has shown where and possibly why flares occur, but the physics of the instability involved, of the particle acceleration, and of the heating are still not understood. (IAA)

  17. SRTM Anaglyph: Corral de Piedra, Argentina

    Science.gov (United States)

    2001-01-01

    Volcanism and erosion are prominently seen in this view of the eastern flank of the Andes Mountains taken by Shuttle Radar Topography Mission (SRTM). The area is southeast of San Martin de Los Andes, Argentina. Eroded peaks up to 2,210-meter-high (7,260-foot) are seen on the west (left), but much of the scene consists of lava plateaus that slope gently eastward. These lava flows were most likely derived from volcanic sources in the high mountains. However, younger and more localized volcanic activity is evident in the topographic data as a cone surrounding oval-shaped flow near the center of the scene.The plateaus are extensively eroded by the Rio Limay (bottom of the image) and the Rio Collon Cura and its tributaries (upper half). The larger stream channels have reached a stable level and are now cutting broad valleys. Few terraces between the levels of the high plateaus and lower valleys (bottom center and upper right of the volcanic cone) indicate that stream erosion had once temporarily reached a higher stable level before eroding down to its current level. In general, depositional surfaces like lava flows are progressively younger with increasing elevation, while erosional surfaces are progressively younger with decreasing elevation.This anaglyph was produced by first shading a preliminary SRTM elevation model. The stereoscopic effect was then created by generating two differing perspectives, one for each eye. When viewed through special glasses, the result is a vertically exaggerated view of the Earth's surface in its full three dimensions. Anaglyph glasses cover the left eye with a red filter and cover the right eye with a blue filter.Elevation data used in this image was acquired by the Shuttle Radar Topography Mission (SRTM) aboard the Space Shuttle Endeavour, launched on Feb. 11, 2000. SRTM used the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle

  18. The handling of nuclear emergencies in Argentina

    International Nuclear Information System (INIS)

    Hernandez, Daniel; Jordan, Osvaldo; Kunst, Juan; Bruno, Hector

    2008-01-01

    team and a decision-making team at its Headquarters, with the responsibility of conducting the whole emergency. At the same time, the ARN shall deploy a team to the emergency area, led by the Operative Head of Nuclear Emergencies Response- 'Jefe Operativo de Emergencias Nucleares (JOEN)' - who is in charge of the response at the local level (up to about ten kilometers). The JOEN is also responsible for the coordination of other organizations included in the response at the local level. This paper presents the organization of the preparation and response in case of nuclear emergencies that was developed in Argentina, considering the particular responsibilities assigned to ARN by the current legislation. In addition, three essential topics in this working scheme - the training of the members of the public, the coordination of the different organizations and the development of knowledge and skills in ARN relevant areas- are developed. (author)

  19. Comparative study of series of solar radiation; Estudio comparativo de series de radiacion solar

    Energy Technology Data Exchange (ETDEWEB)

    Adaro, Agustin; Cesari, Daniela; Lema, Alba; Galimberti, Pablo; Barral, Jorge [Universidad Nacional de Rio Cuarto, (Argentina)

    2000-07-01

    In any team or solar device that it seeks to be designed and dedicated to the use of the solar energy it will be had the most appropriate information on the radiation levels. Being this source of dependent energy of the atmospheric and meteorological fluctuations, it is that requires have the information best regarding the quantity and variability of the available solar energy. A road is already the statistical treatment of the data available, so much of solar radiation as of hours of sun. This focus generates a lot of expectation for the biggest quantity in information regarding the hours of existent sun. This bigger information of hours of sun is due to that the mensurations are carried out with instruments called heliografos with a level of complexity and much smaller cost that the instruments of radiation mensuration. Among the heliografos the most used one is that of Campbell-Stokes, and it is the one that you had installed in most of the meteorological stations of Argentina and the World, for what the information of hours of sun is the one that more is plentiful. The present work has for objective to find an interrelation between the measured series of hours of sun and irradiation. The study is carried out using models of temporary series and the pattern of Angstrom-Page. The are carried out a study of the generation of radiation sequences using models of temporary series and the pattern of Angstrom-Page. They are carried out a study of the generation of radiation sequences using the concept of the Chains of Markov. Rio Cuarto's series are analyzed for being determined the transfer function among both series, and the values of global solar radiation are obtained for towns of the same region. They are the coefficients of Anstrom-Page's Equation for Rio Cuarto. They are the values monthly means for these two methods and results are compared. [Spanish] En cualquier equipo o dispositivo solar que pretenda ser disenado y destinado al aprovechamiento de

  20. Thermal solar energy - application in industrial heat processes; Energia solar termica - aplicacion en procesos industriales de calor

    Energy Technology Data Exchange (ETDEWEB)

    Bonneschky, Alexis [Universidad Tecnica de Brandenburgo/Cottbus (Germany); Roth, Pedro; Cancino, Beatriz [Universidad Tecnica Federico Santa Maria, Valparaiso (Chile); Kanig, Thomas [Germany, (Georgia)

    2000-07-01

    agua en la industria, integrando a las empresas a traves de alguna estrategia que signifique una finalidad comun que beneficie a ambas. En este informe se presenta un proyecto realizado con dos empresas vecinas en la region de Branderburgo Alemania, que se benefician mutuamente por la instalacion de la energia solar, pero que son independientes en cuanto a sus propositos y capitales. La primera empresa es la fabrica FK-Solartchnik Kleinkoschen que produce colectores solares para agua caliente y le interesa desarrollar publicidad en este sentido, por lo que puso a disposicion de la segunda industria el area necesaria para instalar los colectores solares. La segunda empresa, es la FGT Glaswerk Kleinkoschen que produce planchas de vidrio de alta calidad, pero no cuenta con fachada disponible para la instalacion de ningun equipo solar. En esta industria, para la fabricacion del vidrio, se utiliza agua caliente. Las planchas de vidrio, ya cortadas, pasan a un proceso de lavado y secado. El lavado, requiere de un volumen de 1 m{sup 3}/dia agua caliente, a 600 grados Celsius y se realiza entre las 6:30 y las 15:30 h. El calentamiento del agua era efectuado con dos calentadores electricos (alrededor de 12 kW cada uno). Se diseno un equipo solar que permite disminuir las perdidas de energia en la acumulacion en las horas siguientes al proceso, donde se calienta el agua, y adicionalmente se cubre parte de los requerimientos del agua consumida. Este equipo tiene una superficie de colector de 27 m{sup 2}. Con este sistema, mas el aporte realizado por los trabajadores de la empresa, disminuyo la temperatura del agua de lavado en 20 K, sin afectar la calidad del producto y se redujo ademas el consumo anual de energia electrica de la empresa en 15,000 kWh, utilizando los recursos de la energia solar en un 50% del consumo total.

  1. Solar Energy Basics | NREL

    Science.gov (United States)

    Solar Energy Basics Solar Energy Basics Solar is the Latin word for sun-a powerful source of energy that can be used to heat, cool, and light our homes and businesses. That's because more energy from the technologies convert sunlight to usable energy for buildings. The most commonly used solar technologies for

  2. A solar neutrino loophole: standard solar models

    Energy Technology Data Exchange (ETDEWEB)

    Rouse, C A [General Atomic Co., San Diego, Calif. (USA)

    1975-11-01

    The salient aspects of the existence theorem for a unique solution to a system of linear of nonlinear first-order, ordinary differential equations are given and applied to the equilibrium stellar structure equations. It is shown that values of pressure, temperature, mass and luminosity are needed at one point - and for the sun, the logical point is the solar radius. It is concluded that since standard solar model calculations use split boundary conditions, a solar neutrino loophole still remains: solar model calculations that seek to satisfy the necessary condition for a unique solution to the solar structure equations suggest a solar interior quite different from that deduced in standard models. This, in turn, suggests a theory of formation and solar evolution significantly different from the standard theory.

  3. Relative Militarization and Its Impact on Public Policy Budgetary Shifts in Argentina, 1963-1982

    Science.gov (United States)

    1988-07-01

    Until such a time, the reader is advised to consult the extensive literature on the subject (e.g. Cavarozzi, 1983; Historia Politica Argentina , 1985...34 Desarrollo Econ6mico, V.19. (1981), "Teoria y practica del liberalismo. Politica antiinfla- cionaria y apertura economica en la Argentina 1976-1981...American Political Economy. Boulder: Westview Press. Historia Politica Argentina , 1942-1982. (1985) Buenos Aires: Editorial del Belgrano. 48 Hughes, S.W

  4. First record in Argentina of Drepanosiphum oregonense Granovsky (Hemiptera: Aphididae) found on maples (Sapindaceae)

    OpenAIRE

    Ortego, Jaime; Olave, Anabel; Mier Durante, Milagros Pilar

    2014-01-01

    Se informa del hallazgo del áfido Drepanosiphum oregonense Granovsky (Hemiptera: Aphididae) sobre árboles de Acer pseudoplatanus y A. campestre (Sapindaceae) en Argentina lo que constituye el primer registro de la especie y del género Drepanosiphum Koch en Argentina y el segundo en Sudamérica. The finding in Argentina of the aphid Drepanosiphum oregonense on "maple tree" Acer pseudoplatanus ...

  5. The text of the agreement between the Agency and Argentina relating to the application of safeguards

    International Nuclear Information System (INIS)

    1995-01-01

    The Agreement between the Republic of Argentina, the Federative Republic of Brazil, the Brazilian-Argentine Agency for Accounting and Control of Nuclear Materials and the International Atomic Energy Agency for the Application of Safeguards came into force on 4 March 1994. As a result of the coming into force of the aforesaid Agreement for Argentina, the application of safeguards under the Agreement of 23 October 1973 between Argentina and the IAEA relating to the application of safeguards has been suspended

  6. Solar engine system

    International Nuclear Information System (INIS)

    Tan, K.K.; Bahrom Sanugi; Chen, L.C.; Chong, K.K.; Jasmy Yunus; Kannan, K.S.; Lim, B.H.; Noriah Bidin; Omar Aliman; Sahar Salehan; Sheikh Ab Rezan Sheikh A H; Tam, C.M.; Chen, Y.T.

    2001-01-01

    This paper reports the revolutionary solar engine system in Universiti Teknologi Malaysia (UTM). The solar engine is a single cylinder stirling engine driven by solar thermal energy. A first prototype solar engine has been built and demonstrated. A new-concept non-imaging focusing heliostat and a recently invented optical receiver are used in the demonstration. Second generation of prototype solar engine is described briefly. In this paper, the solar engine system development is reported. Measurement for the first prototype engine speed, temperature and specifications are presented. The benefits and potential applications for the future solar engine system, especially for the electricity generating aspect are discussed. (Author)

  7. Photovoltaic solar concentrator

    Science.gov (United States)

    Nielson, Gregory N.; Cruz-Campa, Jose Luis; Okandan, Murat; Resnick, Paul J.; Sanchez, Carlos Anthony; Clews, Peggy J.; Gupta, Vipin P.

    2015-09-08

    A process including forming a photovoltaic solar cell on a substrate, the photovoltaic solar cell comprising an anchor positioned between the photovoltaic solar cell and the substrate to suspend the photovoltaic solar cell from the substrate. A surface of the photovoltaic solar cell opposite the substrate is attached to a receiving substrate. The receiving substrate may be bonded to the photovoltaic solar cell using an adhesive force or a metal connecting member. The photovoltaic solar cell is then detached from the substrate by lifting the receiving substrate having the photovoltaic solar cell attached thereto and severing the anchor connecting the photovoltaic solar cell to the substrate. Depending upon the type of receiving substrate used, the photovoltaic solar cell may be removed from the receiving substrate or remain on the receiving substrate for use in the final product.

  8. Solar workshops financial incentives

    Energy Technology Data Exchange (ETDEWEB)

    None

    1979-01-01

    Ten one-day workshops were held across the United States. Information in this workbook is compiled in conjunction with those workshops. The following discussions are included: solar as a fuel (history); why alternative fuels are being sought today; the need for conservation; advantages of solar energy; the potential of solar energy; why solar energy is not more widely used; a definition of solar; how solar can help meet energy demands; Federal policies and programs; what solar technologies exist today that can be effectively utilized (thermal applications, fuels from biomass, solar electric). Additional information is presented in three attachments: Energy-Conserving Methods; Domestic Policy Review of Solar Energy; and DOE Secretary's Annual Report to Congress-Solar Section. (MCW)

  9. PERFORMANCE EVALUATION OF SOLAR COLLECTORS USING A SOLAR SIMULATOR

    OpenAIRE

    M. Norhafana; Ahmad Faris Ismail; Z. A. A. Majid

    2015-01-01

    Solar water heating systems is one of the applications of solar energy. One of the components of a solar water heating system is a solar collector that consists of an absorber. The performance of the solar water heating system depends on the absorber in the solar collector. In countries with unsuitable weather conditions, the indoor testing of solar collectors with the use of a solar simulator is preferred. Thus, this study is conducted to use a multilayered absorber in the solar collector of...

  10. A short history of the beginnings of hospital information systems in Argentina.

    Science.gov (United States)

    Yácubsohn, V

    2012-01-01

    To describe the development of early health information systems in Argentina and their impact on the development of professional societies in the discipline The first hospital information systems and health surveillance systems in Argentina are described and related to the rise of professional organizations for health informatics. The early health information systems in Argentina are related to precursor developments in medical informatics. Argentina saw a number of hospital information systems developed starting in 1977, which had an important influence on the practice and experience in medical informatics in the country, and the participation of Argentine professionals in national, regional, and international activities in the field.

  11. La mortalidad por armas de fuego en Argentina entre 1990 y 2008 Firearm mortality in Argentina, 1990-2008

    Directory of Open Access Journals (Sweden)

    Marina Gabriela Zunino

    2012-04-01

    Full Text Available Este es un estudio epidemiológico descriptivo de la mortalidad por armas de fuego en Argentina, 1990-2008. Se analizaron los porcentajes y las tasas de mortalidad por armas de fuego entre las jurisdicciones del país. Los datos provienen de la Dirección de Estadística e Información en Salud, Ministerio de Salud y Ambiente, República Argentina. Entre 1990-2008 se produjeron 358.484 muertes por causas externas de las cuales el 16,6% (59.339 correspondieron a armas de fuego. La Provincia de Buenos Aires presentó el porcentaje y tasas cruda y ajustada superiores. Las jurisdicciones de la Región Pampeana (incluye Provincia de Buenos Aires presentaron un perfil más homogéneo y similar al del país: aumento de las tasas en 1999-2002 y disminución en 2003-2006. Estos hallazgos se explicarían en parte por el deterioro socioeconómico vivido en Argentina a fines del siglo XX, que habría tenido mayor impacto en Provincia de Buenos Aires, por ser ésta una de las provincias con mayor desarrollo y dinamismo económico de Argentina. La situación de Provincia de Buenos Aires habría estado agravada por el hecho de tener una de las fuerzas policiales más represivas del país.This is a descriptive epidemiological study of firearm mortality in Argentina, 1990-2008. The study compared the firearm mortality percentages and rates between the country's jurisdictions. The data are from the Office of Health Statistics and Information, Ministry of Health. From 1990 to 2008 there were 358,484 deaths from external causes, of which 16.6% (59,339 were caused by firearms. The Province of Buenos Aires showed the highest percentage and crude and adjusted rates. The jurisdictions in the Pampeana region (including the Province of Buenos Aires showed a more homogeneous profile, similar to that of the country as a whole, with an increase in the rates from 1999 to 2002 and a decrease from 2003 to 2006. These findings are partially explained by the country

  12. Solar collector array

    Science.gov (United States)

    Hall, John Champlin; Martins, Guy Lawrence

    2015-09-06

    A method and apparatus for efficient manufacture, assembly and production of solar energy. In one aspect, the apparatus may include a number of modular solar receiver assemblies that may be separately manufactured, assembled and individually inserted into a solar collector array housing shaped to receive a plurality of solar receivers. The housing may include optical elements for focusing light onto the individual receivers, and a circuit for electrically connecting the solar receivers.

  13. Solar heating and cooling.

    Science.gov (United States)

    Duffie, J A

    1976-01-01

    Solar energy is discussed as an energy resource that can be converted into useful energy forms to meet a variety of energy needs. The review briefly explains the nature of this energy resource, the kinds of applications that can be made useful, and the status of several systems to which it has been applied. More specifically, information on solar collectors, solar water heating, solar heating of buildings, solar cooling plus other applications, are included.

  14. The boom and crisis of the Convertibility Plan in Argentina

    Directory of Open Access Journals (Sweden)

    SEBASTÍAN PEDRO SALVIA

    2015-06-01

    Full Text Available This article analyses the relationship between state policies and economy in Argentina 1991-2001. In 1991 the currency board regime named 'convertibility' was implemented, within the framework of important neoliberal reforms introduced by the State. These neoliberal reforms facilitated capitalist restructuring, characterized by a leap in productivity, investment and profits. Likewise, these reforms generated imbalances which, along with the changes in the world market conditions from 1998, led to the deepest crisis in Argentina's history. The inefficiency of state neoliberal policies in managing the crisis, based on fiscal adjustment to guarantee the continuity of external financing, led to an economic depression and a financial crash, sparking a mass rebellion and the end of convertibility.

  15. Argentina 1967-70. Un tentativo fallito di stabilizzazione.

    Directory of Open Access Journals (Sweden)

    G. MAYNARD

    2014-08-01

    Full Text Available Between 1950 and 1966 prices in Argentina rose at an average annual rate exceeding 25 percent. There have been several attempts to stabilise the situation, notably in 1966 when the military government took command. This attempt appeared to have considerable initial success, however, by 1970 the inflation rate began to accelerate again. This article describes the nature and characteristics of the stabilisation policy pursued in 1967-69. The author explains why, despite its initial success, in the end it broke down. Implications for the structuralist-monetarist controversy are then drawn. Finally, some conclusions that can be drawn for long-run development strategy and short-run stabilisation policy in Argentina are suggested.JEL: E31, E52, E60

  16. Industrial integration of the fuel cycle in Argentina

    International Nuclear Information System (INIS)

    Koll, J.H.; Kittl, J.E.; Parera, C.A.; Coppa, R.C.; Aguirre, E.J.

    1983-01-01

    The power-reactor construction program in Argentina for the period 1976-1985 is described on the basis of which the nuclear-fuel requirements have been determined. Activities connected with the fuel cycle commenced in 1950 in Argentina with the prospection and working of uranium deposits. On the basis of the nuclear power program described, plans have been drawn up for the establishment of the industrial plants that will be needed to ensure the domestic supply of fuel. The demand for fuel is correlated with the availability of uranium resoures and it is shown to be desirable from the technical, economic and industrial point of view to integrate the front end of the fuel cycle, keeping the irradiation aspects and the tail end at the development level. Progress made in this field and current programs covering exploration, concentrate production, nuclear purification, conversion to uranium dioxide, production of special alloys and fuel element fabrication are described

  17. [More than a century of international immigration into Argentina].

    Science.gov (United States)

    Celton, D E

    1995-01-01

    "From the second half of the 19th century, Argentina was, along with the United States and Brazil, one of the main destinations that attracted European emigration to America.... The arrival of more that six million people between 1869 and 1930 resulted in radical changes in the socioeconomic structure of the country. After the crisis of the 1930s the impact of a development plan based on the export of agricultural products waned and the economic growth accompanied with political instability generated a slowing decline of migratory flows, despite a new wave between 1945 and 1952. The decrease of international migration comes along with an important change in the composition by places of origin.... The article analyses the successive migratory policies of Argentina's government as well as the migrants' spatial distribution and their incorporation in the labor market." (SUMMARY IN ENG AND SPA) excerpt

  18. Teaching Humanities at the National University of la Plata, Argentina.

    Science.gov (United States)

    Acuña, Leopoldo E

    2003-10-01

    In this article the author begins by giving a brief history of medical education in Argentina, then provides some background information on the National University of La Plata. He describes two major initiatives at La Plata: a new and pioneering admission policy (implemented in 1993) and a change in the number of hours and years in the curriculum. He then looks back to the introduction in 1976 of La Plata's medical humanities program. Over its 20 year existence, the program has undergone a number of changes in response both to students' interests and financial concerns. The revised humanities curriculum now consists of four elective courses: medicine and literature, anthropology, history of medicine, and "medical kalology" (which focuses on music and dance). Unfortunately, the program, while it has been well received by both students and faculty and has inspired programs at other Argentinean schools, is threatened by Argentina's economic crisis.

  19. Rights questioned. Limitations of poverty-reduction policies in Argentina.

    Science.gov (United States)

    Faur, Eleonor; Campos, Luis; Pautassi, Laura; Zimerman, Silvina

    2009-01-01

    This article analyses, from a human rights' approach, a group of social programmes implemented in Argentina from the year 2002, at the time of the biggest socioeconomic crisis that the country has suffered in the last decades. The main characteristics of the programmes are reviewed, and their anti-poverty strategy, along with design and implementation, are evaluated in relation to human rights. An assessment is also made of the existence of mechanisms for citizens to present claims. Finally, a set of recommendations are made to facilitate the adaptation of the programmes analysed to the duties the State of Argentina has as result of its adherence to international laws on human rights. The analytical methodology proposed by this article could be applied to other policy areas.

  20. Industrial integration of the fuel cycle in Argentina

    International Nuclear Information System (INIS)

    Koll, J.H.; Kittl, J.E.; Parera, C.A.; Coppa, R.C.; Aguirre, E.J.

    1977-01-01

    The paper describes the power reactor construction programme in Argentina for the period 1976-1985, on the basis of which the nuclear fuel requirements have been determined. Activities connected with the fuel cycle commenced in 1950 in Argentina with the prospection and working of uranium deposits. On the basis of the nuclear power programme described, plans have been drawn up for the establishment of the industrial plants that will be needed to ensure the domestic supply of fuel. The demand for fuel is correlated with the availability of uranium resources and it is shown to be desirable from the technical, economic and industrial point of view to integrate the front end of the fuel cycle, keeping the irradiation aspects and the tail end at the development level. The authors report the progress that has been made in this field and describe current programmes covering prospection, concentrate production, nuclear purification, conversion to uranium dioxide, production of special alloys and fuel element fabrication. (author)