90 research outputs found

    Principais espécies arbóreas hospedeiras de cipó-titica (Heteropsis flexuosa) em Rondônia.

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    O objetivo deste trabalho foi identificar as principais espécies arbóreas hospedeiras de cipó titica (Heteropsis flexuosa) em Floresta Ombrófila Aberta como base para o manejo e conservação da espécie.bitstream/CPAF-RO-2009-09/12383/1/ct96_cipo-titica.pd

    Avaliação da severidade ferrugem (Hemileia vastatrix) em cafeeiros (Coffea canephora) cultivados em condições de sombreamento.

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    O estudo objetiva determinar a severidade da ferrugem ao longo de um período de um ano, em cafeeiros sombreados comparando-os com plantios tradicionais, localizados à pleno sol.bitstream/CPAF-RO-2010/13297/1/ct103-ferrugemdocafeeiro.pd

    Estudo químico das sementes de bacuri.

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    The comparative analysis of the seeds of bacuri and bacuripari show,with respects to the fat content, diferences in the quantitative composition of theirs fatty acids (palmitic 44,2:42,3, palmitoleic 13,2:1,0, stearic 2,3:4,6, oleic 37,8:39,9 and linoleic acids 2,5:12,2; %:%, respectively), and the fact that tripalmitin is present in the fatty extracts of bacuri seeds, in appreciable quantities (10%). These fats, especially from bacuri seeds, can be recommended as alternative sources for industry.A análise comparativa das sementes de bacuri e baripari mostrou, com respeito à gordura, diferenças na composição quantitativa de seus ácidos graxos (ácidos palmítico 44,242,3, palmitoleíco 13,2:1,0, estárico 2,3:4, 6, oleíco 37,8:39,9 e linoleíco 2,5:12,3; %:%, respectivamente), além da presença de tripalmitina nos extrativos graxos das sementes de bacuri, podem ser indicadas como fontes alternativas à indústria

    Labeling mesenchymal cells with DMSA-coated gold and iron oxide nanoparticles : assessment of biocompatibility and potential applications

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    Nanoparticles’ unique features have been highly explored in cellular therapies. However, nanoparticles can be cytotoxic. The cytotoxicity can be overcome by coating the nanoparticles with an appropriated surface modification. Nanoparticle coating influences biocompatibility between nanoparticles and cells and may affect some cell properties. Here, we evaluated the biocompatibility of gold and maghemite nanoparticles functionalized with 2,3-dimercaptosuccinic acid (DMSA), Au-DMSA and γ-Fe2O3-DMSA respectively, with human mesenchymal stem cells. Also, we tested these nanoparticles as tracers for mesenchymal stem cells in vivo tracking by computed tomography and as agents for mesenchymal stem cells magnetic targeting

    A Bottom Sediment Distribution Map for the Portuguese Continental Shelf in ArcGis Format: Mapa da Distribuição de Sedimentos Superficiais da Plataforma Continental Portuguesa em Formato ArcGis

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    This work presents a simplified map of the spatial distribution of surficial sediments and rock outcrops along the Portuguese continental shelf in ArcGIS format. Preliminary map preparation involved scanning, georeferencing and digitizing of pre-existing base maps from the Portuguese Hydrographic Institute and harmonization with other published and non-published cartographic information. Samples of soft bottom shelf sediments from nearly 500 sites, collected in the scope of the MeshAtlantic, RENSUB and ACOSHELF projects, were analyzed for grain-size and total organic matter. Grain-size analysis was performed using dry and wet sieving. The procedure includes chemical destruction of organic matter with H2O2, chemical dispersion with tetra-sodium pyrophosphate, separation of the mud fraction by wet sieving and dry sieving of both sand and gravel fractions. Raw grain-size data were expressed as weight percentages and classified according to a modified version of the Folk classification system. Grain size data for the whole set of samples were used to create a new sediment distribution map and develop an easy-to-use GIS interface, that will be available in the MeshAtlantic website, as part of a global broadscale habitat map for the Atlantic Area. Overall, the bottom sediment distribution patterns show that: (a) the coarser deposits occur mainly in the inner and mid-shelf of the northwestern sector of the Portuguese shelf, to the south of the Nazaré and Setúbal canyons, and are sparsely represented in the southern shelf; (b) sand banks dominate in the near shore shelf, but can sporadically be found at greater depths; (c) muddy sands characterize the deeper shelf; (d) patches of sandy mud and mud reflecting a less energetic hydrodynamic regime cover a large sector of the southern shelf and areas located off the mouths of major rivers in the western shelf; (e) mixed sediments are residual; (f) rock outcrops are unevenly distributed throughout the entire shelf
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