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546,196 artículos
Año:
2009
ISSN:
1699-4949, 1699-4949
Figuerola, M. Carme
Asociación de Francesistas de la Universidad Española
Resumen
Reading Notes do not require an abstract
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Año:
2009
ISSN:
1699-4949, 1699-4949
Pérez Varela, Carlos
Asociación de Francesistas de la Universidad Española
Resumen
Reading Notes do not require an abstract
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Año:
2009
ISSN:
1390-924X, 1390-1079
Peña Gutiérrez, Juan Carlos
CIESPAL
Resumen
El autor es un becario del CIESPAL (1989) quien da cuenta pormenorizada de la extraordinaria experiencia que obtuvo en el Curso Taller sobre "Producción de Programas Informativos para la radio"", cambiando para bien la visión profesional que le dio grandes satisfacciones en su natal Bolivia."
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Año:
2009
ISSN:
1390-924X, 1390-1079
Barrios Rubio, Andrés
CIESPAL
Resumen
Las nuevas tecnologías modificaron las concepciones tradicionales de los medios y los procesos de comunicación. El Internet se transformó en un aliado ideal. La radio por Internet debe ser un espacio de interacción de las diferentes comunidades, por ello es importante que la pluralidad y el consenso colectivo sean dos elementos siempre vigentes en su funcionamiento, deben servir para difundir las tradiciones y los valores y ofrecer un espacio de expresión y participación a los ciberescuchas.
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Año:
2009
ISSN:
1390-924X, 1390-1079
Pérsigo, Patrícia M.
CIESPAL
Resumen
Los cambios climáticos son una realidad creciente para la población mundial, para mitigar sus efectos se han creado estrategias de movilización social. Actualmente el Internet se configura como un nuevo espacio de discusión y crítica. Una esfera pública se forma a través de la actividad comunicacional cuando diferentes públicos se organizan en redes comunicativas articuladas para discutir temas o causas de interés común para asumir posiciones y expresar opiniones.
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Año:
2009
ISSN:
1390-924X, 1390-1079
Christofoletti, Rogério
CIESPAL
Resumen
Este artículo es el resultado de dos investigaciones realizadas en Brasil. El análisis ético de casos periodísticos es un eje transversal en la educación, pues le ayuda al profesional a comprender mejor su oficio frente a la realidad. Comenta sobre los resultados del Congreso Mundial de Enseñanza de Periodismo en Singapur (2007) y sobre la experiencia brasileña en la educación superior de Periodismo.
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Año:
2009
ISSN:
1390-924X, 1390-1079
Jurado Vargas, Romel
CIESPAL
Resumen
Enfatiza el autor que la mejor forma de que rindan cuentas los medios de comunicación y que se evite la suspicacias y sospechas es que se defina en la Ley de participación o en la Ley de Comunicación, los asuntos específicos sobre los que los medios de comunicación, en cumplimiento de sus responsabilidades sociales, deben rendir cuentas o transparentar la comunicación. Esta Ley por nada puede ser considerada como inconstitucional.
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Año:
2009
ISSN:
2256-201X, 0120-0739
Flechas, Henry; Arango, Camilo; Morales, Nelly B; Jiménez, Jhon
Universidad Distrital Francisco José de Caldas
Resumen
This research included the chemical and phytochemical studies and the industrial scaling in pilot plant of three products of Sapindus saponaria, commonly known as jaboncillo, Michu. This work is part of an interdisciplinary research project aimed at the exploitation and commercialization of its harvested products: oil, gum, and triterpenoidal sapogenins. These three products were obtained through physical and chemical processes both in laboratory (phase 1) and in the industrial scaling stage (phase 2). During the laboratory stage different methods of extraction and purification were studied and assessed, along with the corresponding methods of chemical analysis for the three origins (Palmira, Valle; Viotá, Cundinamarca, and Santa María, Huila). Based on laboratory studies, extraction and purification processes were designed in a pilot plant supplied by the quinacol ltda. company, whose business is the production, research and development of products for the phytopharmaceutical industry. Developed products were characterized by methods of instrumental analysis of nuclear magnetic resonance (1 H nmr and 13c), flame ionization detector gas chromatography (gc), infrared spectroscopy (ir) and specific chemical analysis techniques designed for these products. The mature fruit of Santa María presented increased performance of oil and rubber; as well as the green fruit of Viotá, in a substance called Ss1, possibly hederagenina. Of the products obtained in the pilot phase, oil presented a high percentage of unsaturated fatty acids and rubber showed a high thickening capacity in aqueous solutions. Oil and rubber could be marketed from this species' fruit, because its composition and characteristics, as well as its performance, meets the main parameters of marketing, for which studies on industrial perfectibility are needed.
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Año:
2009
ISSN:
2256-201X, 0120-0739
Polanco Tapia, César; Grande Pulido, Diana Carolina
Universidad Distrital Francisco José de Caldas
Resumen
In this paper we conducted a relationship of the timber found with ecological aspects arising from an earlier study of the characterization, structure and floral composition practiced in the Cárpatos Forest Reserve, bordering the site from which wood samples were obtained. This comparison shows a strong link between the microscopic anatomical characteristics of vegetal species with the type of association to which they belong. For example, characters such as the grouping form, the type of perforated and intervessel pits, height, number of cells wide, stratification and type of cells that make up the radio and type fiber, show a greater degree of change in the exclusive species of Ocotea callophylla-Weinmannietum pinnatae (OW) association, while the same characters show minor changes in the exclusive species of Clusia multiflorae - Weinmannietum balbisianae(CW) association. The evolution of the timber was identified through an index that suggests the research based on references like Carlquist (2001) and León (2001), and its relationship with the plant associations found in the study area is argued.
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Año:
2009
ISSN:
2256-201X, 0120-0739
Carvajal Rojas, Lyndon; Uribe, Yoshie Hata; Sierra Martínez, Noralba; Rueda Niño, Diana
Universidad Distrital Francisco José de Caldas
Resumen
In order to improve the knowledge of Colombian flora, particularly that belonging to the llanos orientales region, Strychnos schultesiana Krukoff was chosen for a chemical composition indepth study to establish a potential utility in medicinal or industrial fields. For this analysis, a preliminary phytochemical study of three organs of the plant steams, seeds and leafs was made; the purpose was to find the main secondary metabolites associated with biological activities: alkaloids, flavonoids, tannins, saponins, antracenic derivates, steroids, coumarins, cardiotonic glycosides and terpenic lactones. The main compounds were alkaloids. This fact was expected, as this species belongs to the genus Strhychnos, widely known because of its high alkaloid content. In addition, the existence of flavonoids in the studied organs of the plant is very remarkable. These compounds are well known as scavengers, useful in prevention of diseases related with oxidative processes. Finally, the results of this work are very useful as a first approach to the knowledge and utility of the vegetal species found in this location. Furthermore, this plant has big agronomical advantages related with the culture establishment, which improves the rational use of natural resources in our country, as a means of regional and national development.
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