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Preliminary study by Environmental Indicator Measurements of sediments in a Mangrove Forest in Ilha Grande Bay,Rio de Janeiro,southeastern Brazil

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Journal of Environmental Protection 2012年第8期3卷 731-739页

作者： ana Maria A.Velho claudia A.F.Aiub Jose L.Mazzei sergio M.correa Mario L.G.soares Israel Felzenszwalb Department of Biophysics and Biometry Institute of Biology Roberto Alcantara GomesRio de Janeiro State UniversityVila IsabelBrazil Departamento de Genetica e Biologia Molecular Instituto BiomedicoUniversidade Federal do Estado do Rio de JaneiroCentroBrazil Department of Environmental chemistry Institute of ChemistryRio de Janeiro State UniversityResendeBrazil center for Research on Mangroves Institute of OceanographyRio de Janeiro State UniversityMaracanaBrazil

Mangroves perform essential functions in biological cycles and are protected by law in Brazil. However, they are being degraded above their support limit, leading to a reduction in the areas around the world. The area investigated in the present study is a potentially unpolluted mangrove ecosystem in the south of Rio de Janeiro state, Brazil. The aim of this work was to investigate the presence of metals and polycyclic aromatic hydrocarbons (PAHs) in mangrove sediment and to correlate them with mutagenic and genotoxic activity. Four seasonal samplings undertaken between 2009 and 2010 at five sites were analyzed. Dichloromethane extracts were obtained under sonication and subjected to mutagenicity assays using salmonella microsuspension. Metal (cd, cr, cu, Ni and Pb) contents were determined by atomic absorption spectrometry, while the quantification of PAHs was performed by gas chromatography-mass spectrometry. Goniopsis cruentata hemocytes were used to assess potential genotoxic damage (Micronucleus assay). The absence of mutagenicity was observed for all samples using salmonella typhimurium strains TA97, TA98, TA100 and TA102, in the absence and presence of an exogenous mammalian metabolizing system. Among the metals, cd and cu were detected in autumn at values exceeding the threshold effect level and below the probable effect level. Benzo[a] pyrene was detected at levels above the threshold at one site, where small effects could be observed in the biota. significant differences in the micronucleated cells observed suggest DNA damage had been induced by the PAHs identified.

关键词： sediments Mutagenicity Goniopsis cruentata Genotoxicity Polycyclic Aromatic Hydrocarbons(PAHs) Metals

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为 interventional neuroradiologist 的诊断 neuroradiology

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World Journal of Radiology 2013年第11期5卷 386-397页

作者： Vitor Mendes Pereira Maria isabel Vargas ana Marcos Philippe Bijlenga ana Paula Narata sven Haller Karl-Olof Lvblad service Neuro-diagnostique et Neuro-interventionnel Geneva University Hospitals service de Neurochirurgie HUG Geneva University Hospitals

In order to further improve the impact of the continuously evolving neurointerventional techniques, the interventional neuroradiologist needs to have at his disposal more powerful techniques to image the central nervous system. With the recent development of diagnostics techniques that are computed tomography and magnetic resonance based we are now able to assess not just morphology, but also physiology, physiopathology and function. This review discusses the place of diagnostic techniques in the evaluation that the interventional neuroradiologist hast to make when confronted with patients. We provide an overview of current techniques for the brain and spine.

关键词： Neuroradiology Brain Imaging Magnetic resonance Interventional radiology

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Tropical isabella Grape Juices： Bioactive compounds and Antioxidant Power Depends on Harvest season

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Journal of Food science and Engineering 2013年第2期3卷 64-70页

作者： cinthia Bau Betim cazarin Luiz claudio correa Juliana Kelly da silva Angela Giovana Batista cibele Priscila Busch Furlan Aline camarao Telles Biasoto Giuliano Elias Pereira ana cecilia Poloni Rybka Mairio Roberto Marostica Junior Department of Food and Nutrition University of Campinas Campinas Sao Paulo 13083-862 Brazil Brazilian Agricultural Research corporation Embrapa Tropical Semi-arid Petrolina Pernambuco 56302-970 Brazil Brazilian Agricultural Research corporation Embrapa Grape & Wine/Tropical Semi-arid Petrolina Pernambuco 56302-970Brazil

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