997 resultados para Frei Aleixo de Meneses


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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

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En el presente informe se analiza la dinámica reciente de las relaciones comerciales entre este país centroamericano y Chile. Con ello se busca detectar espacios para la ampliación y diversificación de dicho comercio, especialmente desde Guatemala hacia Chile. Se hace presente que ello no depende solo de la remoción de los obstáculos existentes al comercio bilateral, sino de múltiples otros factores. Este informe tiene como principal valor agregado un análisis del comportamiento de las empresas en el comercio bilateral, en términos de su cantidad, tamaño, concentración y permanencia.

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Pós-graduação em Psicologia - FCLAS

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Tetradifon, a potentially carcinogenic and mutagenic pesticide, can contribute to environmental and human contamination when applied to green bell pepper crops. In this context, in this work, a reliable and sensitive method for determination of tetradifon in Brazilian green bell pepper samples involving a differential pulse voltammetry (DPV) technique on a glassy carbon electrode is proposed. The electrochemical behavior of tetradifon as followed by cyclic voltammetry (CV) suggests that its reduction occurs via an irreversible five–electron transfer vs. Ag|AgCl, KCl 3 M reference electrode. Very well–resolved diffusion controlled voltammetric peaks have been obtained in a supporting electrolyte solution composed of a mixture of 40% dimethylformamide (DMF), 30% methanol, and 30% NaOH 0.3 mol L−1 at −1.43, −1.57, −1.73, −1.88, and −2.05 V. The proposed DPV method has a good linear response in the 3.00 – 10.0 μmol L−1 range, with a limit of detection (L.O.D) of 0.756 μmol L−1 and 0.831 μmol L−1 in the absence and in the presence of the matrix, respectively. Moreover, improved L.O.D results (0.607 μmol L−1) have been achieved in the absence of DMF from the supporting electrolyte solution. Recovery has been evaluated in five commercial green bell pepper samples, and recovery percentages ranging from 91.0 to 109 have been obtained for tetradifon determinations. The proposed voltammetric method has also been tested for reproducibility, repeatability, and potential interferents, and the results obtained for these three analytical parameters are satisfactory for electroanalytical purposes.

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EL Presidente de Chile, Excelentísimo Señor Eduardo Frei, en carta dirigida el 6 del presente a los señores Raúl Prebisch, Director General del Instituto Latinoamericano de Planificación Económica y Social, José Antonio Mayobre, Secretario Ejecutivo de la CEPAL, Felipe Herrera, Presidente del Banco Interamericano de Desarrollo, y Carlos Sanz de Santa María, Presidente del Comité de los Nueve, hace un serio llamamiento con el fin de que los economistas mencionados, haciendo uso de su calidad de personas imparciales, sin implicancias de orden político y nacional, presenten propuestas concretas a los gobiernos latinoamericanos, que permitan examinar los problemas económicos sin dificultad y suspicacia, en beneficio del desarrollo económico y social de los pueblos de toda la región.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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The taxonomy of the genus Campylorhamphus Bertoni, 1901 is still uncertain, with many inconsistent evolutionary patterns implied by current taxonomy. A re-analysis of the type-series of Campylorhamphus procurvoides successor Todd, 1948 revealed that the holotype is indistinguishable from Campylorhamphus trochilirostris notabilis Zimmer, 1934, while the paratypes belonged either to the latter taxon or to a second already named taxon (Campylorhamphus trochilirostris snethlageae Zimmer, 1934), and a third and yet undescribed taxon allied to Campylorhamphus procurvoides. Here, we present statistical analyses of morphological data supporting the synonymization of C. p. successor into C. t. notabilis, the name with priority. Our findings resolve the long-standing controversy related to the distribution of Campylorhamphus procurvoides populations in the várzea habitats of the lower Amazon River.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)