969 resultados para Tourism -- Environmental aspects -- North America
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Includes bibliography
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Incluye Bibliografía
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Incluye bibliografía
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Includes bibliography
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Incluye Bibliografía
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Includes bibliography
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Includes bibliography
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The review purposes are to (1) evaluate the experimental evidence for adverse effects on reproduction and metabolism and (2) identify the current knowledge of analytical procedures, biochemistry and environmental aspects relating to organotins. Organotins are pollutants that are used as biocides in antifouling paints. They produce endocrine-disrupting effects in mollusks, such as imposex. In rodents, organotin exposure induces developmental and reproductive toxicity as well as alteration of metabolic homeostasis through its action as an obesogen. The adverse effects that appear in rodents have raised concerns about organotins' potential health risk to humans in relation to organotin exposure. At present, triorganotin, such as tributyltin, have been demonstrated to produce imposex, and mammalian reproductive and metabolic toxicity. For most mammals, triorganotin exposure predominantly occurs through the ingestion, and this compound can cross the placenta. With these risks in mind, it is important to improve our knowledge of organotins' effects on environmental health. © 2012 Elsevier Inc.
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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Pós-graduação em Geociências e Meio Ambiente - IGCE
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Incluye bibliografía.
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This issue of FAL Bulletin analyses the role of good modal integration between port facilities and the rail network to ensure port competitiveness.
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A partir del levantamiento realizado en cuatro países de la región (Argentina, Colombia, México y Uruguay), el presente documento examina las principales reformas y políticas de innovación y pymes realizadas en los últimos años. De este análisis se desprende la escasa vinculación que existe entre estos ámbitos de acción, lo que, dados los rets que enfrenta el mundo de hoy, deben ser vinculados más estrechamente con la sustentabilidad ambiental.
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El presente estudio tiene por objeto relacionar la problemática del desarrollo sostenible con la explotación de gas natural no convencional a nivel general y en específico para los países seleccionados