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Registros recuperados: 11
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Cinétiques de décontamination en milieu contrôlé de moules toxiques (Diarrheic Shellfish Poison). Premiers résultats ArchiMer
Bardouil, Michele; Masselin, Pierre; Bohec, Madeleine.
Laboratory assays have been performed, using mussels contamined with Dinophysis, in order to assess potential depurations kinetics. Mussels samples from Seine bay, Douarnenez bay and Vilaine bay have been tested . From these assays, which are to be performed in 1989; two main results are stressed : 1) when the toxicity level is near 0,5 MU/g of hepatopancreas*, depuration is undedectable during twelve days, 2) when the toxicity level exceeds 1 MU/g,depuration is important during the first eight days. *(quarantine level used by Japanese authorities) .
Tipo: Text Palavras-chave: Moules; DSP; Dinophysis; Décontamination; Blue mussels; DSP; Dinophysis; Depuration.
Ano: 1989 URL: http://archimer.ifremer.fr/doc/00430/54148/55479.pdf
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Décontamination expérimentale de bivalves toxiques : application aux phycotoxines paralysantes. Rapport final ArchiMer
Lassus, Patrick; Bardouil, Michele; Masselin, Pierre; Naviner, Magali; Truquet, Philippe.
A sea water recirculating flume was especially designed in the framework of this study. It improves physiological and ecophysiological evaluation of a 25 oysters (c. gigas) set fed on PSP toxic A. minutum cultures and then detoxified with commonly used aquaculture species (I. galbana, T. suecica, S. costatum, T. weissflogii). Chlorophyll a levels are kept steady in each case and adjusted in order to reach the same food value in each tank (0,5 mg/l TPM). When exposed to the mildly toxic species A. minutum (0,5 pg.eq.STX.cel-1) oysters depict a reduced clearance rate, food uptake and shell-valves activity (compared to non-toxic algal diets). The same physiological parameters do not show any significant differences when oysters are exposed to the control al...
Tipo: Text Palavras-chave: Épuration; Crassostrea gigas; Alexandrium minutum; PSP; Écophysiologie; Depuration; C. gigas; A. minutum; PSP; Ecophysiology.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00139/25021/23126.pdf
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  Depuración por transplante del bivalvo comercial papo´e reina (Atrina rigida) de la bahía de amuay, Venezuela, afectado por bioacumulación de hidrocarburos OceanDocs
Rengel, J.; Lugo, M.; Pomares, O.; Leal, Y..
Un método utilizado para disminuir o eliminar concentraciones elevadas de residuos en moluscos bivalvos, es la depuración. Este método consiste en la colocación del molusco en agua no contaminada o limpia durante un período determinado de tiempo y se basa en la capacidad auto purgante de los moluscos por sus características de organismos filtradores, eliminándose así los residuos que permanecen en dicho organismo. Por esta razón, se capturaron varios ejemplares del molusco bivalvo Atrina rigida y se colocaron en un ambiente natural no contaminado y determinaron las concentraciones de hidrocarburos totales, para evaluar el comportamiento de estos en el tejido de los animales, cada 12 horas por un período de 11 días de depuración. Paralelamente se...
Tipo: Journal Contribution Palavras-chave: Depuration; Quality.
Ano: 2012 URL: http://hdl.handle.net/1834/4544
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Effect of food supply on the detoxification in the blue mussel, Mytilus edulis, contaminated by diarrhetic shellfish toxins ArchiMer
Marcaillou-le Baut, Claire; Haure, Joel; Mondeguer, Florence; Courcoux, Anne; Dupuy, Beatrice; Penisson, Christian.
The objective of this study was to identify a possible effect of food on the acceleration of decontamination in blue mussels, Mytilus edulis, containing diarrhetic toxins belonging to the okadaic acid (OA) structural group. An experimental protocol was designed to describe and compare the decontamination kinetics and detoxification rates of naturally OA-contaminated mussels that had either received or not received food for three weeks. The protocol was applied in two trials (in June 2006 and June 2007, called Ker06 and Ker07), conducted one year apart on samples of mussels collected in the same area, at the same season. Okadaic acid (OA), the main lipophilic toxin produced by the toxic alga Dinophysis acuminata, was analysed over the course of the...
Tipo: Text Palavras-chave: Mussel; Feeding; Digestive gland; Depuration; Okadaic acid; Acyl esters; Marine lipophilic biotoxins; Mass spectrometry.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00025/13650/10883.pdf
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Evaluation of viral shellfish depuration in a semi-professional tank ArchiMer
Pommepuy, Monique; Caprais, Marie-paule; Le Saux, Jean-claude; Le Mennec, Cecile; Parnaudeau, Sylvain; Madec, Yvon; Monier, Martial; Brest, Goulven; Le Guyader, Francoise.
Depuration processes try to eliminate microorganisms using seawater to allow living, filter-feeding shellfish to naturally purge themselves from agents they accumulated from the environment. Until now the only parameter to evaluate depuration was the decrease in E. coli counts. Studies have shown that viruses can persist in the environment longer than E. coli and that shellfish meeting the endstandard (< 230 E.colil /100g) have been involved in viral outbreaks. Starting in February 2000, the European Commission has been funding (Fifth Framework Programme), a 3-year project entitled "Virus Safe Seafood". One of the specific objectives of this project is to innovate technology for shellfish depuration. For this purpose a depuration system was designed and...
Tipo: Text Palavras-chave: Bacteriophage FRNA; Depuration; Shellfish.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/acte-1208.pdf
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Exposure of marine mussels Mytilus spp. to polystyrene microplastics: Toxicity and influence on fluoranthene bioaccumulation ArchiMer
Paul-pont, Ika; Lacroix, Camille; Gonzalez Fernandez, Carmen; Hegaret, Helene; Lambert, Christophe; Le Goic, Nelly; Frere, Laura; Cassone, Anne-laure; Sussarellu, Rossana; Fabioux, Caroline; Guyomarch, Julien; Albentosa, Marina; Huvet, Arnaud; Soudant, Philippe.
The effects of polystyrene microbeads (micro-PS; mix of 2 and 6 μm; final concentration: 32 μg L−1) alone or in combination with fluoranthene (30 μg L−1) on marine mussels Mytilus spp. were investigated after 7 days of exposure and 7 days of depuration under controlled laboratory conditions. Overall, fluoranthene was mostly associated to algae Chaetoceros muelleri (partition coefficient Log Kp = 4.8) used as a food source for mussels during the experiment. When micro-PS were added in the system, a fraction of FLU transferred from the algae to the microbeads as suggested by the higher partition coefficient of micro-PS (Log Kp = 6.6), which confirmed a high affinity of fluoranthene for polystyrene microparticles. However, this did not lead to a modification...
Tipo: Text Palavras-chave: Microplastics; Fluoranthene; Mussel; Depuration; Oxidative system.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00344/45502/45848.pdf
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Metal subcellular partitioning determines excretion pathways and sensitivity to cadmium toxicity in two marine fish species. ArchiMer
Le Croizier, Gael; Lacroix, Camille; Artigaud, Sebastien; Le Floch, Stephane; Munaron, Jean-marie; Raffray, Jean; Penicaud, Virginie; Rouget, Marie-laure; Lae, Raymond; Tito De Morais, Luis.
Subcellular cadmium (Cd) partitioning was investigated in the liver of two marine fish species, the European sea bass Dicentrarchus labrax and the Senegalese sole Solea senegalensis, dietary exposed to an environmentally realistic Cd dose for two months followed by a two-month depuration. Cd exposure did not modify Cd cellular partitioning for either species, refuting the spillover hypothesis. Both species contained most of the Cd in the detoxifying fraction but displayed different handling strategies. Cd was largely bound to heat stable proteins (HSP) including metallothioneins (MT) in sea bass while Cd was more linked to metal rich granules (MRG) in sole. Whole liver concentrations and subcellular partitioning were also determined for essential elements....
Tipo: Text Palavras-chave: Sub-cellular fractionation; Dicentrarchus labrax; Solea senegalensis; Essential element distribution; Elimination; Depuration.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00464/57606/59792.pdf
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Processing Strategies to Inactivate Enteric Viruses in Shellfish ArchiMer
Richards, Gary P.; Mcleod, Catherine; Le Guyader, Soizick.
Noroviruses, hepatitis A and E viruses, sapovirus, astrovirus, rotavirus, Aichi virus, enteric adenoviruses, poliovirus, and other enteroviruses enter shellfish through contaminated seawater or by contamination during handling and processing, resulting in outbreaks ranging from isolated to epidemic. Processing and disinfection methods include shellfish depuration and relaying, cooking and heat pasteurization, freezing, irradiation, and high pressure processing. All the methods can improve shellfish safety; however, from a commercial standpoint, none of the methods can guarantee total virus inactivation without impacting the organoleptic qualities of the shellfish. Noroviruses cause the majority of foodborne viral illnesses, yet there is conflicting...
Tipo: Text Palavras-chave: Shellfish; Processing; Norovirus; Hepatitis A virus; Depuration; High pressure; Heat inactivation.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00011/12253/9199.pdf
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Spirolide uptake and detoxification by Crassostrea gigas exposed to the toxic dinoflagellate Alexandrium ostenfeldii ArchiMer
Medhioub, Walid; Lassus, Patrick; Truquet, Philippe; Bardouil, Michele; Amzil, Zouher; Sechet, Veronique; Sibat, Manoella; Soudant, Philippe.
Oysters (Crassostrea gigas) were exposed 4 days to cultures of the toxic dinoflagellate Alexandrium ostenfeldii (strain CCMP1773) that produces spirolides belonging to fast acting toxins (FAT) and let depurate for 7 days. During depuration, oysters were either fed the non-toxic algae Isochrysis galbana Tahitian clone (T. Iso) or starved. The objectives of this experiment were to evaluate (i) spirolide uptake and depuration by oysters (ii) spirolide effects on oysters and (iii) oyster recovery according to food supply during depuration. A. ostenfeldii cells were filtered and ingested by oysters while faeces contained numerous intact cells of the toxic diet. This suggested that ingested cells were not totally digested by oysters. Contents of spirolides (SPX)...
Tipo: Text Palavras-chave: Spirolides; Alexandrium ostenfeldii; Contamination; Depuration; Crassostrea gigas; Inflammatory responses.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00098/20953/18740.pdf
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Toxicité des moules : étude de la décontamination PSP et DSP in vitro et in situ ArchiMer
Lassus, Patrick; Berthome, Jean-paul.
Laboratory bioassays have been performed. using toxic P. tamarensis mass cultures (MOG 835), in order to assess potential depuration kinetics of PSP contamined cultured blue mussels. Besides, from fields observations and translocation experiences to safe area, we have seeked for probable depuration kinetics of shellfishes having accumulated during summer 1986 high levels of DSP producing Dinophysis. Such preliminary studies may drive to further experiences giving more accuracy to the establishment of thresholds recquired by shellfishes depuration policy.
Tipo: Text Palavras-chave: Moules; PSP; DSP; Protogonyaulax tamarensis; Dinophysis; Décontamination; Blue mussels; PSP; DSP; Protogonyaulax tamarensis; Dinophysis; Depuration.
Ano: 1987 URL: http://archimer.ifremer.fr/doc/00119/23020/20851.pdf
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Use of rotavirus virus-like particles as surrogates to evaluate virus persistence in shellfish ArchiMer
Loisy, Fabienne; Atmar, R; Le Saux, Jean-claude; Cohen, J; Caprais, Marie-paule; Pommepuy, Monique; Le Guyader, Soizick.
Rotavirus virus-like particles (VLPs) and MS2 bacteriophages were bioaccumulated in bivalve mollusks to evaluate viral persistence in shellfish during depuration and relaying under natural conditions. Using this nonpathogenic surrogate virus, we were able to demonstrate that about 1 log(10) of VLPs was depurated after 1 week in warm seawater (22 degrees C). Phage MS2 was depurated more rapidly (about 2 log(10) in 1 week) than were VLPs, as determined using a single-compartment model and linear regression analysis. After being relayed in the estuary under the influence of the tides, VLPs were detected in oysters for up to 82 days following seeding with high levels of VLPs (concentration range between 10(10) and 10(9) particles per g of pancreatic tissue)...
Tipo: Text Palavras-chave: Seawater; Viral diseases; Bioaccumulation; Depuration; Contamination; Model; Pancreas; Regression analysis; Shellfish; Phages; Virus.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-1233.pdf
Registros recuperados: 11
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