4,311 research outputs found

    Efeito da vitamina C no ganho de peso e em parâmetros hematológicos de tambaqui.

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    O objetivo deste trabalho foi avaliar o efeito da suplementação dietária com ácido L-ascórbico (vitamina C) no ganho de peso e em parâmetros hematológicos de juvenis de tambaqui, Colossoma macropomum

    Isolamento e caracterização de Flavobacterium columnare de tambaqui (Colossoma macropomum).

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    O objetivo deste estudo foi de realizar o isolamento e a caracterização de Flavobacterium columnare de tambaqui (Colossoma macropomum) criado em tanques escavados na região de Rio Preto da Eva - AM

    High coercivity induced by mechanical milling in cobalt ferrite powders

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    In this work we report a study of the magnetic behavior of ferrimagnetic oxide CoFe2O4 treated by mechanical milling with different grinding balls. The cobalt ferrite nanoparticles were prepared using a simple hydrothermal method and annealed at 500oC. The non-milled sample presented coercivity of about 1.9 kOe, saturation magnetization of 69.5 emu/g, and a remanence ratio of 0.42. After milling, two samples attained coercivity of 4.2 and 4.1 kOe, and saturation magnetization of 67.0 and 71.4 emu/g respectively. The remanence ratio MR/MS for these samples increase to 0.49 and 0.51, respectively. To investigate the influence of the microstructure on the magnetic behavior of these samples, we used X-ray powder diffraction (XPD), transmission electron microscopy (TEM), and vibrating sample magnetometry (VSM). The XPD analysis by the Williamson-Hall plot was used to estimate the average crystallite size and strain induced by mechanical milling in the samples

    Toxicidade aguda do paration metílico para tambaqui (Colossoma macropomum).

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    O objetivo deste trabalho foi determinar a toxicidade aguda do paration metílico para o tambaqui

    O uso do cruzamento para a produção de carne ovina.

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