2,074 research outputs found

    Interlinking two institutional KOS about agroecology: using LOD Agrovoc to circumvent the language barrier in identifying terminological intersections.

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    This work describes the methodological approach proposed to resolve the matter of indicating equivalent terms in both languages to the same concept recorded in Agrovoc related to the discipline of Agroecology

    Photocatalytic asphalt mixtures: Mechanical performance and impacts of traffic and weathering abrasion on photocatalytic efficiency

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    The photocatalytic asphalt mixture provides safer roads and mitigates the air quality problems, trapping and degrading organic compounds and also harmful gases. In this research, an asphalt mixture was functionalized with nano-TiO2 by bulk incorporation, using the contents 3 and 6%, and by spraying coating using an aqueous solution over its surface at different temperatures and rates. For bulk incorporation, the mechanical performance was assessed. The factors ? application procedure, influence of temperature, spraying rate, incorporation percentage and TiO2 immobilization (from traffic and rain removal) ? were evaluated based on Rhodamine B (RhB) degradation. For bulk incorporation, the best content nano-TiO2 was 3%. The temperature of the substrate has no influence on the photocatalytic results. The most effective spraying rates were 8 and 16?mL/cm2. Before simulating the traffic effect, the spraying coating technique was more effective than the bulk incorporation one. After this process, the opposite behavior was detected. The rain simulation did not cause removal of the nanoparticles. Additionally, the exposed aggregates affected the photocatalytic efficiency, being important their contribution combined to the effect of nano-TiO2. To have the maximum benefit of the techniques studied, the ideal solution would be the combination of both, with negligible impact on mechanical performance.This work was partially financed by FCT—Fundação para a Ciência e a Tecnologia—under the project PTDC/FIS/120412/2010: “Nanobased concepts for Innovative & Eco-sustainable constructive material’s surfaces’’ and project PEst-OE/ECI/UI4047/2014

    Diversidade de parasitos metazoários em Geophagus altifrons (Cichlidae) da Bacia do Rio Jari, AP, Brasil.

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    O objetivo deste estudo foi investigar a comunidade e infracomunidades de parasitos em Geophagus altifrons do Rio Jari, município de Laranjal de Jari, estado do Amapá, na região da Amazônia Oriental.Editoras técnicas: Cristiane Ramos de Jesus, Ana Cláudia Lira-Guedes e Adelina do Socorro Serrão Belém. ODS-14

    Resíduo micropulverizado da moagem a seco de milho não afeta biodisponibilidade de zinco em ratos.

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    Trabalho apresentado no XV Congresso Latinoamericano de Nutricion e XVI Jornadas de la Sociedad Chilena de Nutrición, 2009, Santiago do Chile
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