Acercamiento conceptual a la situación del adulto mayor en América Latina

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Guía conceptual y metodológica para instructores de cursos de capacitación de INFOPLAN

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Categorías DEVSIS: esquema clasificatorio y conceptual

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Descentralización fiscal: marco conceptual

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Desarrollo social y planificación social: estudio de problemas conceptuales = Social development and social planning: a survey of conceptual and practical problems in Latin America

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Conceptual aspects of privatization

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Comment on the article by Isaac Cohen Orantes and Gert Rosenthal "Reflections on the conceptual framework of Central American economic integration"

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A simple procedure for the preparation of laponite and thermoplastic starch nanocomposites: Structural, mechanical, and thermal characterizations

The aim of this article is to propose advances for the preparation of hybrid nanocomposites prepared by the combination of intercalation from solution and melt-processing methods. This research investigates the effect of the laponite RDS content on the thermal, structural, and mechanical properties of thermoplastic starch (TPS). X-ray diffraction was performed to investigate the dispersion of the laponite RDS layers into the TPS matrix. The results show good nanodispersion, intercalation, and exfoliation of the clay platelets, indicating that these composites are true nanocomposites. The presence of laponite RDS also improves the thermal stability and mechanical properties of the TPSmatrix due to its reinforcement effect which was optimized by the high degree of exfoliation of the clay. Thus, these results indicate that the exfoliated TPS-laponite nanocomposites have great potential for industrial applications and, more specifically, in the packaging field. © The Author(s) 2011 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

Comentario sobre el artículo de Isaac Cohen Orantes y Gert Rosenthal "Reflexiones sobre el marco conceptual de la integración económica centroamericana"

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Reflections on the conceptual framework of Central American economic integration

Includes bibliography

Reflexiones sobre el marco conceptual de la integración económica centroamericana

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Redes de apoyo social de las personas mayores: marco conceptual

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Notas sobre estilos de desarrollo: origen, naturaleza y esquema conceptual

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