Valoración de impacto ambiental por pesticidas agrícolas.

El uso de agroquímicos en Argentina se ha fortalecido junto con la expansión agrícola. El objetivo de este trabajo es la elaboración de una metodología para calcular el impacto ambiental que los pesticidas causan en el medio ambiente teniendo en cuenta los siguientes factores: "ecotoxicología": categoría toxicológica, toxicidad en abejas, aves y peces; "Toxicidad humana": carcinogenicidad, neurotoxicidad, alteraciones endocrinas, genotoxicidad y capacidad irritativa; "Comportamiento ambiental": la persistencia en el agua / sedimento, persistencia en el suelo y bioconcentración. Estos factores fueron clasificados como bajo, medio, alto o muy alto, de acuerdo con su nivel de toxicidad. Los resultados indican que los plaguicidas más tóxicos son los insecticidas. La mayoría de los pesticidas utilizados son la toxicidad media (43,75%), seguido de baja y alta toxicidad (21,88%) y, los de muy alta toxicidad (12,5%). La metodología propuesta podría ser utilizada como una herramienta de monitoreo, gestión o educación ambiental.

The University Programmes for Senior Citizens and their contribution of lifelong learning

The study addresses the essential features of University Programmes for senior citizens (PUM). It committed to the lifelong education through the integration of the elderly in the University. Part of the base that is learned during the entire life cycle, there is no age, no specific space for education. Learning is constructed from knowledge, abilities, skills and aptitudes that are enriched continuously. It is necessary to ensure the elderly to age in a healthy way. It calls for active ageing, effective tool against isolation and social exclusion. The aim is to discover aspects of the UNED Senior training programme that contribute to lifelong learning and satisfaction produced. The PUM are ways for the promotion of aging along with other activities aimed to enhance a creative leisure, access to culture, facilitate training on topics of interest and create a means of participation in all spheres of society. In this research has resorted to a mixed methodology. Their wealth combines the methods of quantitative and qualitative allowing us to obtain information and contrast from different perspectives. The purpose is to verify the results of the investigation. The sample consists of 639 students, 57 teachers and 15 coordinators. The results indicate that the PUM of the UNED Senior is highly satisfactory for those involved, by the adequacy between interests and expectations. Fruit of this research are the conclusions and suggestions for improvement.