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	Provedor de dados Arq. Bras. Med. Vet. Zootec. (6) Autor Silva,M.V.G.B. (6) Martinez,M.L. (3) Verneque,R.S. (3) Camargo,L.S.A. (2) Campos,W.E. (2) Carvalho,A.U. (2) Ferreira,A.M. (2) Ferreira,F. (2) Pires,M.F.A. (2) Silva,P.F. (2) Sá,W.F. (2) Araújo,M.C.C. (1) Barreto Filho,J.B. (1) Brito,J.R.F. (1) Brito,M.A.V.P. (1) Campos,A.L. (1) Folhadella,I.M. (1) Guimarães,S.E.F. (1) Machado,M.A. (1) Moreira,E.C. (1) Mais... Palavra-chave Bovino (3) Bioclimatologia (2) Gir (2) Bactéria (1) BoLA-DRB3 (1) Bovine (1) Bovinos (1) Classificação andrológica (1) Cortisol (1) Desidratação (1) Embryo (1) Gene candidato (1) Hematologia (1) Histologia (1) Interferon-tau (1) Mastite bovina (1) PCR-RFLP (1) PIV (1) Pelame (1) Qualidade do leite (1) Mais... Tipo do documento Info:eu-repo/semantics/article (6) Ano 2009 (3) 2006 (1) 2005 (2) País Brazil (6) Idioma Português (5) Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 59 Primeira ... 1 2 3 ... Última Influence des rejets urbains sur la contamination de la rivière de Morlaix par les métaux ArchiMer Boutier, Bernard; Chiffoleau, Jean-francois; Gonzalez, Jean-louis; Noel, Joelle. Raw and processed outflow from the Morlaix city sewage treatment plant were monitored every fourth hour for a 24 hours period, and monthly for eight months. The urban Hg, Cd, Cu, Zn and Pb outflow was shown to be much less than the river-borne flux. Sediments from the catchment area and estuary show that the influence of the town on the metal concentrations is limited to the harbour basin. The metal concentations are essentially controlled by granulometry. Tipo: Text Palavras-chave: Métaux; Sédiment; Rivière de Morlaix. Ano: 1990 URL: http://archimer.ifremer.fr/doc/00167/27793/25986.pdf Distribution of Cd and Hg in the Bay of Marennes-Oléron ArchiMer Gonzalez, Jean-louis; Boutier, Bernard; Chiffoleau, Jean-francois; Auger, Dominique; Noel, Joelle; Truquet, Isabelle. The study of Cd and Hg distribution in the sediments, water and suspended matter of the Bay of Marennes-Oléron provided the opportunity to identify the factors governing the distribution of these two contaminants throughout the bay. On one hand, these elements are associated with the continental inputs from the Charente river which settle on arrivaI at the mouth of the estuary and in the eastern part of the bay. The Cd and Hg present in these deposits are associated with POC, as weIl as with Mn and Fe oxides and hydroxides. On the other hand, a portion of the dissolved inputs is recycled in the bay waters through phytoplankton activity. This mechanism contributes, particularly in the case of Cd, to increased particulate metal fluxes from the water column... Tipo: Text Palavras-chave: Baie de Marennes-Oléron; Métaux lourds; Sédiments; MES; Activité phytoplanctonique; BAY OF MARENNES-OLERON; HEAVY METALS; SEDIMENTS; SUSPENDED MATTER; PHYTOPLANKTON ACTIVITY. Ano: 1991 URL: http://archimer.ifremer.fr/doc/00085/19604/17242.pdf Comportement du cadmium et du mercure lors de la diagenèse précoce et flux à l'interface eau-sédiments en zone littorale ArchiMer Gonzalez, Jean-louis. The early diagenesis of Cd and Hg has been studied in different coastal areas (vasière Ouest-Gironde, Pertuis d'Antioche, baie de Marennes-Oléron). For these two metals, the fluxes at the sediment-water interface have been calculated. Considering only molecular diffusion, the diffusionnal fluxes of Cd and Hg to the colurnn water are negligible with regard to both the particular fluxes to the sediments and the inputs of the "Gironde" and "Charente" ·,estuaries. The take into account of the different processes which affect the ex changes at the interface (erosion, bioturbation) permits more realistic an estimation of the role of sediments in the geochemical cycle of Cd and Hg. The results show that up to 50% of particular Cd and Hg which are integrated into... Tipo: Text Palavras-chave: Cadmium; Mercure; Eaux intrstitielles; Diagenèse précoce; Flux; Interface eaux-sédiments; Bioturbation; Modélisation; Cadmium; Mercury; Pore waters; Early diagenesis; Fluxes; Sediment-water interface; Bioturbation; Modelling. Ano: 1992 URL: http://archimer.ifremer.fr/doc/00442/55402/56920.pdf Spéciation des contaminants métalliques en milieu estuarien : Intérêt de la modélisation et application au cadmium ArchiMer Gonzalez, Jean-louis; Dange, Catherine; Thouvenin, Benedicte. In estuarine environment, cadmium has a nonconservative behavior. It can be present under various species: dissolved (mineral and organic complexes), colloidal and particulate forms (adsorbed, precipitated), or integrated by various mechanisms in the organisms. This distribution is the result of processes (physical, chemical and biological) which are controlled by many factors (salinity, pH, Eh, nature and concentration of suspended matter, primary production). Geochemical modeling is a very useful approach to understand the dynamics of this type of contaminant, especially in the complex systems which are the estuaries. A speciation model was used to simulate the measurements taken (dissolved and particulate Cd) during various cruises carried out in the... Tipo: Text Palavras-chave: Cadmium; Estuary; Speciation; Modeling; Surface complexation; Cadmium; Estuaire; Spéciation; Modélisation; Complexation de surface. Ano: 2001 URL: https://archimer.ifremer.fr/doc/00480/59120/61749.pdf Contribution of modeling to the knowledge of trace elements behaviour and speciation in estuaries ArchiMer Gonzalez, Jean-louis; Dange, Catherine; Thouvenin, Benedicte. Geochemical models are excellent tools for the understanding of trace elements dynamics, in particular in complex environments like estuaries. Their aim is to reproduce numerically the biogeochemical processes observed in the field or laboratory. The development and the use of this kind of tool requires: - in-situ data on the distribution in space and time of the elements studied and relationship with the environmental variables. - experimental data (mainly based on the use of radioactive analogues of the studied elements) for evaluation of model parameters and the validation of model assumptions. The model must be capable not only of reproducing the distribution of metals between the dissolved and particulate phases, but also of evaluating the... Tipo: Text Ano: 2002 URL: https://archimer.ifremer.fr/doc/00479/59099/61737.pdf Mercury transformations and exchanges in a high turbidity estuary: The role of organic matter and amorphous oxyhydroxides ArchiMer Laurier, Fabien; Cossa, Daniel; Gonzalez, Jean-louis; Breviere, Emily; Sarazin, G. The speciation and partition of mercury in a macrotidal estuary (Seine estuary, France) was studied in order to explore the role of the high turbidity zone (HTZ) in mercury transfer to the adjacent coastal waters. Water and particles were analyzed to determine the concentrations of various mercury species, including monomethylmercury and the inorganic fraction. The exchangeable particulate mercury, which varies with salinity, and the mercury fraction associated with the amorphous oxyhydroxides were evaluated. The distribution of dissolved mercury species during early mixing suggests non-conservative behavior of organically bound mercury at the head of the estuary. Mercury in the particles covaried positively with suspended particulate matter concentrations... Tipo: Text Palavras-chave: Sediments; Biogenic thiols; Fluorescence detection; Seine estuary; Mercury. Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-425.pdf Réalisation d'un modèle de dispersion d'un rejet de dragage et des contaminants associés. Rapport définitif: contrat « LITEAU » 2ème phase ArchiMer Alzieu, Claude; Andral, Bruno; Bassoullet, Philippe; Boutier, Bernard; Gonzalez, Jean-louis; Huet, Martial; Jestin, Herve; L'Yavanc, Jacky; Michel, Pierre; Paulet, Yves-marie; Quiniou, Francoise; Silva Jacinto, Ricardo. Le projet à pour but de modéliser la dispersion des immersions des boues de dragage, à partir de modèles numériques de manière à pouvoir évaluer le devenir de la charge particulaire et des contaminants associés. Les résultats des expérimentations en laboratoire montrent, qu'à l'échelle représentative du temps de séjour des particules dans la colonne d'eau du champ proche (quelques heures), on ne constate pas de solubilisation des métaux. La libération de la fraction associée aux eaux interstitielles et les flux à l'interface eau-sédiment (diagenèse précoce) après dépôt des sédiments rejetés, sont les processus qui pourraient être la cause d'un apport important de Cd (ou autre contaminant) dissous dans le milieu. Les hypothèses retenues pour l'élaboration... Tipo: Text Ano: 2003 URL: http://archimer.ifremer.fr/doc/00075/18621/16172.pdf Modeling trace metal accumulation in the mediterranean mussel, mytilus galloprovincialis ArchiMer Casas, Stellio; Cossa, Daniel; Gonzalez, Jean-louis; Bacher, Cedric; Andral, Bruno. Monitoring coastal contamination by trace metals pollution using mollusks bivalves as quantitative bioindicators is widely performed in many international biomonitoring programs. In this purpose, modeling metal dynamic in marine mussels is a reliable tool. It allows understanding the bioaccumulation process which results from the interactions between biological, chemical and environmental factors. To calibrate such a model, kinetic experiments on uptake and elimination were conducted on three Mediterranean sites chosen on the basis of their different nutritive and chemical characteristics. Tipo: Text Palavras-chave: Growth; Heavy metals; Bioaccumulation; Mytilus galloprovincialis; Bioindicator. Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-370.pdf In situ kinetics of mercury bioaccumulation in mytilus galloprovincialis estimated by transplantation experiments ArchiMer Casas, Stellio; Cossa, Daniel; Gonzalez, Jean-louis; Bacher, Cedric; Andral, Bruno. Monitoring coastal contamination by trace metals pollution using mollusks bivalves as quantitative bioindicators is widely performed in many international biomonitoring programs. For this purpose, studying mercury dynamic in marine mussels is a reliable tool. In situ experiments on uptake and elimination kinetics were conducted in three Mediterranean sites, chosen on the basis of their contamination levels. Mussels were transplanted from a clean area to a highly contaminated one and then transferred back to a clean site. This approach makes it possible to define bioaccumulation factors and uptake and elimination rates consistently with the real environmental conditions. Tipo: Text Palavras-chave: Transplantation; Heavy metals; Bioaccumulation; Mytilus galloprovincialis; Bioindicator. Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/acte-369.pdf Role of particle sorption properties in the behavior and speciation of trace metals in macrotidal estuaries: The cadmium example ArchiMer Gonzalez, Jean-louis; Thouvenin, Benedicte; Dange, Catherine; Chiffoleau, Jean-francois; Boutier, Bernard. The role of particles in the fate and speciation of trace metals in macrotidal estuaries was studied using a surface complexation model (MOCO). Cadmium was selected as the target metal contaminant due to its reactivity in estuaries: cadmium behavior is mainly controlled by heterogeneous processes (sorption/desorption) related to salinity and suspended matter gradients. Various scenarios of suspended matter distribution according to salinity were simulated. The impact of surface properties (specific surface area, density of surface sites, acido-basic properties, and complexation constant) was evaluated using data collected on particles from the Gironde, Loire, and Seine estuaries. Our results show that particle surface properties, evaluated on the basis... Tipo: Text Palavras-chave: Turbidity maximum; Speciation; Sorption; Particles; Modeling; Macrotidal estuaries; Cadmium. Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2005.pdf Modelling Pb and Cd dynamics in the Seine estuary ArchiMer Thouvenin, Benedicte; Gonzalez, Jean-louis; Chiffoleau, Jean-francois; Boutier, Bernard; Le Hir, Pierre. The Seine estuary (France) is currently one of the world's most contaminated estuaries, due in particular to its high cadmium and lead content. Proper understanding of contaminant transfer, transformation and retention mechanisms throughout the estuary and up to the adjacent marine zone require a range of studies involving data collections, experiments, and modeling tool. A multivariable transport model (SiAM-3D) was used to simulate dissolved and particulate transport and it is applied to several calculation grids; a speciation model (MOCO) was used to select key species and obtain a schematic system representation. The coupled model for Cd and Pb was compared with field measurements. The complementary character of various tools (model applied to annual... Tipo: Text Palavras-chave: 3D modeling; Cd and Pb trace metals; Seine estuary. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3009.pdf Bioturbation at the water-sediment interface of the Thau Lagoon: impact of shellfish farming ArchiMer Schmidt, Sabine; Gonzalez, Jean-louis; Lecroart, Pascal; Tronczynski, Jacek; Billy, Isabelle; Jouanneau, Jean-marie. Quantifier les processus de remaniement sédimentaire procure une vision nouvelle du fonctionnement des écosystèmes benthiques de l'étang de Thau, lieu d'une importante production ostréicole. Afin d'évaluer les taux de bioturbation des sédiments de surface, des profils de deux traceurs radioactifs, le béryllium 7Be (T1/2 = 53 jours) et le thorium 234Th (T1/2 = 24.1 jours) ont été mesurés à partir de carottes sédimentaires prélevées entre décembre 2001 et décembre 2006. La sélection de plusieurs sites a permis de couvrir la diversité de l'étang de Thau : C4, T10, et T11 dans le bassin central, C5, T7 et T8 au niveau des secteurs ostréicoles, T2 et T4 à l'ouest du bassin, et T12 à l'est près de la zone industrielle. Le 234Th en excès (234Thxs ; i.e. apporté... Tipo: Text Palavras-chave: Mediterranean Lagoon; Radionuclides; Biodeposition; Sedimentation. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2584.pdf Diatom artificial medium (DAM) a new artificial medium for the diatom Haslea ostrearia and other marine microalgae ArchiMer Gagneux Moreaux, Sindy; Moreau, Christophe; Gonzalez, Jean-louis; Cosson, Richard P.. Artificial media are used in physiological studies of microalgae to maintain consistent conditions from one experiment to another and these media must be adapted to the needs of the organism studied. The artificial medium, in this case named diatom artificial medium (DAM), was designed to maintain long-term cultures of Haslea ostrearia and 19 other planktonic microalgae, and to allow physiological studies related to metal metabolism. The biomass and biochemical composition of H. ostrearia grown in the DAM and in a modified Provasoli medium were compared to assess the suitability of this new artificial medium for the culture of this diatom. The DAM provided sufficient nutrients to allow H. ostrearia to grow as efficiently as in the enriched seawater medium,... Tipo: Text Palavras-chave: Metal speciation; Biochemical parameters; Diatom; Microalgae; Artificial culture medium. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3075.pdf Rôle des particules sur le comportement et la spéciation de métaux traces: exemple du cadmium ArchiMer Gonzalez, Jean-louis; Thouvenin, Benedicte; Dange, Catherine. The role of particles in the fate and speciation of trace metals in macrotidal estuaries was studied using a surface complexation model (MOCO). Cadmium was selected as the target metal contaminant due to its reactivity in estuaries: cadmium behavior is mainly controlled by heterogeneous processes (sorption/desorption) related to salinity and suspended matter gradients.Various scenarios of suspended matter distribution according to salinity were simulated. The impact of surface properties (specific surface area, density of surface sites, acidity instrinsic properties and complexation constant) was evaluated using data collected on particles from the Gironde, Loire and Seine estuaries. Tipo: Text Palavras-chave: Particles; Speciation; Sorption/desorption; Cadmium; Modeling; Surface properties. Ano: 2007 URL: https://archimer.ifremer.fr/doc/00480/59152/61781.pdf Trace metals assessment in water, sediment, mussel and seagrass species - Validation of the use of Posidonia oceanica as a metal biomonitor ArchiMer Lafabrie, Céline; Pergent, G; Kantin, Roger; Pergent Martini, C; Gonzalez, Jean-louis. The accumulation of trace metals (Cd, Co, Cr, Hg, Ni and Pb) was measured in water, sediment, the mussel Mytilus galloprovincialis and the seagrass Posidonia oceanica. Samples were collected in three locations of the north-western Mediterranean (Canari, Livorno and Porto-Torres) which present different levels and sources of human impact. Analyses in the different compartments (water, sediment, M. galloprovincialis and P. oceanica) have allowed to identify Canari as the most Cd, Co, Cr and Ni contaminated site; Livorno as the most Hg contaminated and Porto-Torres as the most Pb contaminated. Furthermore, for the first time, metal concentrations found in P. oceanica have been compared with those found in the water column, in the sediment and in the... Tipo: Text Palavras-chave: Mediterranean sea; Marine organisms; Sediment; Seawater; Biomonitoring; Metal contamination. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3106.pdf Etude pilote pour la mise en place d’un outil de biomonitoring en milieu marin dans le cadre de la mise en place de la Directive Cadre Eau à la Réunion. Programme MODIOLE (2004-2008) ArchiMer Cambert, Harold; Gonzalez, Jean-louis; Andral, Bruno; Turquet, Jean. La mesure directe des contaminants dans l'eau fait appel à des techniques analytiques sophistiquées et coûteuses, difficilement applicables à de nombreux échantillons prélevés le long d'un important linéaire côtier. Par ailleurs, la variabilité du milieu littoral confère une représentativité limitée à une mesure ponctuelle effectuée dans la colonne d’eau. Le biomonitoring utilisant la moule repose sur l’hypothèse que le contenu en contaminant dans la chair de cet animal reflète la concentration en contaminants biodisponibles dans l’eau sous forme particulaire et/ou dissoute, selon un processus de bioaccumulation. Cette hypothèse a été validée pour les substances chimiques de type hydrophobe ou intermédiaire, susceptibles de se bioaccumuler et caractérisées... Tipo: Text Ano: 2008 URL: http://archimer.ifremer.fr/doc/00125/23623/21462.pdf PROJET PEPS La Réunion (Pré étude: Echantillonnage Passif pour la Surveillance de la contamination chimique) Mise en place d'échantillonneurs passifs pour la caractérisation de la contamination chimique des masses d'eau côtières réunionnaises ArchiMer Gonzalez, Jean-louis; Turquet, Jean; Cambert, Harold; Budzinski, Helene; Tapie, Nathalie; Guyomarch, Julien; Andral, Bruno. Ce projet a permis de mettre en évidence le potentiel des techniques d'échantillonnage passif (DGT, POCIS, SBSE) à "grande échelle" (18 masses d'eau côtières: 6 récifales, 10 "mer ouverte" et 2 portuaires) au cours de 2 campagnes réalisées en période sèche et humide (post cyclonique). L'étude montre l'opérationnalité de ces systèmes en terme de réduction des coûts et de rapidité d'obtention des résultats, mais aussi en terme de facilité de mise en œuvre (par du personnel préalablement formé). Ces techniques ont pu être transférées aux acteurs locaux en charge de la surveillance de l'état de la contamination chimique des eaux. Les résultats ont contribué à la caractérisation des masses d'eau par rapport à certains contaminants chimiques (métaux, composés... Tipo: Text Ano: 2009 URL: http://archimer.ifremer.fr/doc/00020/13170/10228.pdf Pressions et état de la contamination chimique marine dans le voisinage d'une grande ville côtière méditerranéenne, le cas de Marseille ArchiMer Sauzade, Didier; Andral, Bruno; Gonzalez, Jean-louis; Pairaud, Ivane; Verney, Romaric; Zebracki, Mathilde; Cadiou, Jean-francois; Boissery, Pierre. Marine pollution is one of the priority issues of the Mediterranean environment. This pollution comes from multiple sources including large coastal cities which are considered as hot-spots. The METROC project objective is to assess gross and net chemical contaminant flows related to large Mediterranean coastal cities, with a first application to the Marseilles area. The methodology consists of i) assessing the present state of the chemical contamination of the coastal environment; ii) assessing inputs to the sea from sewage, small rivers and storm water run-off; and iii) modelling the fate of some key contaminants, in order to attempt to establish a balance between inputs and exports towards the open sea. This short article presents a synthesis on these... Tipo: Text Ano: 2009 URL: http://archimer.ifremer.fr/doc/00070/18164/15721.pdf A preliminary study of a DGT-labile trace metals distribution in the stratified Krka River estuary (Croatia) ArchiMer Blataric, Ana-marija; Garnier, Cedric; Omanovic, Dario; Lenoble, Véronique; Cukrov, Neven; Mounier, Stéphane; Gonzalez, Jean-louis; Pizeta, Ivanka. Tipo: Text Ano: 2009 URL: http://archimer.ifremer.fr/doc/00077/18854/16427.pdf PROJET PEPS Méditerranée (Pré étude: Echantillonnage Passif pour la Surveillance de la contamination chimique) ArchiMer Gonzalez, Jean-louis; Budzinski, Helene; Tapie, Nathalie; Munaron, Dominique. Le projet a permis de tester les possibilités d'utilisation d'échantillonneurs passifs (DGT, POCIS) à "grande échelle" (20 masses d'eau côtières et de transition réparties sur l’ensemble de la façade Méditerranéenne française). Une de ses originalités a été de mettre en évidence l'opérationnalité de ces systèmes en terme de réduction des coûts et de rapidité d'obtention des résultats, mais aussi en terme de facilité de mise en œuvre (par du personnel non spécialisé, mais préalablement formé). Les données obtenues ont contribué à la caractérisation des masses d'eau par rapport à certains contaminants chimiques (composés organiques hydrophiles et métaux): mise en évidence de la présence, ou l’absence, de certains contaminants émergents sur lesquels il n'y... Tipo: Text Ano: 2009 URL: http://archimer.ifremer.fr/doc/00020/13168/10224.pdf Registros recuperados: 59 Primeira ... 1 2 3 ... Última

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