51 resultados para MERCOSUL


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Tinuvin P migration from Polyethyleneterephthalate (PET) bottles was investigated using several fatty-food simulants such as olive oil, soybean oil, n-heptane and iso-octane, at exposure conditions of 2-10 days at 40 degrees C (total immersion). The stability of several UV stabilizers (BHT, Cyasorb UV 5411, Tinuvin P, Tinuvin 326 and Tinuvin 327) in n-heptane and iso-octane was also studied. After 10 days at 40 degrees C, losses of 6% and 20% in iso-octane and n-heptane respectively, were verified for Tinuvin P. Other UV stabilizers at the same experimental conditions showed higher losses (up to 30% for Tinuvin 327). These results confirm that, when carrying out specific migration studies, the stability of the substance of interest should be established in the food simulant to avoid underestimating the real migration behaviour. In order to quantify UV stabilizer migration, n-heptane and iso-octane solutions were concentrated and directly analysed by SIM mode GC-MS. For olive and soybean oils, Tinuvin P was isolated using size-exclusion chromatography and quantified by SIM mode GC-MS. Iso-octane proved to be a move suitable fatty-food simulant than n-heptane for the migration study of Tinuvin P from PET. Higher levels of Tinuvin P migrated to olive and soybean oils rather than to n-heptane. These results suggest that the MERCOSUL recommended official methods for specific migration studies should be revised since the migration levels using n-heptane as a fatty-food simulant could be underestimated when compared to edible oils. Copyright (C) 1999 John Wiley & Sons, Ltd.

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O objetivo deste trabalho é analisar o significado do Mercosul para a política exterior do Brasil. Para isso, discutiremos as percepções das elites brasileiras em relação ao processo de integração regional. A defesa do princípio da intergovernamentalidade está ligada à concepção do lugar do Mercosul nas relações internacionais do país. A grande valorização de princípios como o do universalismo e o de soberania acaba afetando o aprofundamento da integração. A hipótese deste trabalho é que a estrutura do Mercosul seria condizente com as percepções de parte das elites brasileiras. Argumentaremos que a estrutura atual é insuficiente para garantir a dinâmica da integração.

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This article is a reflection on the importance of the integration for the Latin American countries in the globalized age, standing out those specific characteristics of the integrational processes, calling the attention to the cases of the Mercosul and the FTAA. Its intention is to understand the integration beyond its function as a possible promoter of a sustainable development or the international insertion, being part of a process of change in the State itself.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em História - FCHS

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Pós-graduação em Ciências Sociais - FCLAR

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)