Comprehensive two-dimensional gas chromatography coupled with time-of-flight mass spectrometry was used for the identification of forty doping agents. The improvement in the specificity was remarkable, allowing the resolution of analytes that could not be done by one-dimensional chromatographic systems. The sensitivity observed for different classes of prohibited substances was clearly below the value required by the World Anti-Doping Agency. In addition time-of-flight mass spectrometry gives full spectrum for all analytes without any interference from the matrix, resulting in selectivity improvements. These results could support the implementation of an exhaustive monitoring approach for hundreds of doping agents in a single injection.

As comunidades tradicionais da várzea amazônica ocupam uma variedade de ambientes adaptadas às variações sazonais impostas pelo pulso de inundação, o que reflete no desenvolvimento de estratégias de uso e manejo dos recursos naturais. Neste trabalho foi avaliada a territorialidade dessas comunidades, observando a relação custo-beneficio da exploração pesqueira, madeireira e agrícola e sua relação com os conflitos sócioambientais oriundos da exploração de recursos naturais de uso comum em áreas de livre acesso. As entrevistas foram realizadas entre agosto de 2003 e novembro de 2004, atingindo 50% de cada comunidade estudada, na Costa do Canabuoca, município de Manacapuru. As variáveis utilizadas para avaliar a territorialidade foram: rendimento produtivo, econômico e distância percorrida para a exploração. Foram espacializados os ambientes usados para a exploração por meio do Sistema de Informação Geográfica (SIG). Os resultados indicam que a pesca é a atividade geradora de conflitos e territorialidade, produto da interação entre distribuição, disponibilidade, produtividade dos pesqueiros e organização político-institucional dos moradores, que se reflete na relação custo-beneficio.

The traditional communities of the Amazon floodplain occupy a large variety of seasonal environments and have adapted to the variations determined by the flood pulse, which is reflected in the development of their resource managment strategies. In this work the territoriality of these communities was evaluated by observing the cost-benefit relationship for fisheries, forests and agricultural exploration to social and environmental conflicts originating from the explotation of natural resources of common property in areas of open access. Interviews were conducted between August of 2003 and November of 2004, with the head of family in 50% of each community studied, on the coat of Canabouca, district of Manacapuru. The variables used to evaluate territoriality were: production, revenue and distance traveled. The areas of exploitation were analyzed using Global Information System (GIS). The results indicated that fishing activities generate conflicts and territoriality, which is the product of the interaction between distribution, avaliability and productivity of fishing areas and the political organization of the communities, that is reflected in the cost-benefit relationship.