Consulta: subjectFacets:"PCBs"
Registros recuperados: 14
Data/hora: 06/06/2024 01:34:53

Pollutant effects on Pacific oyster, Crassostrea gigas (Thunberg), hemocytes: Screening of 23 molecules using flow cytometry
Provedor de dados: 5
Autores: Gagnaire, Beatrice; Thomas Guyon, H; Burgeot, Thierry; Renault, Tristan.
The shellfish industry is an important economic activity in France, occurring mostly in estuarine zones subject to pollution due to anthropogenic activities. The harmful effects of pollutants on species inhabiting these estuarine zones are not well known. Among marine species, bivalve mollusks---particularly Pacific oyster, Crassostrea gigas-may serve a model of interest. The species is sedentary and filter-feeding, which favors bioaccumulation of pollutants in their tissues. Oysters may be suitable for studies on disturbance by pollutants of physiological activities, among which defense mechanisms are poorly documented in bivalves. In this study, effects of pollutants on hemocyte functions were monitored in Pacific oyster, C. gigas. Hemocytes were exposed...
Tipo: Text
Palavras-chave: Toxicity; Pesticides; PCBs; PAHs; Crassostrea gigas; Pacific oyster; Hemocytes; Flow cytometry; Cellular activities.
Ano: 2006
URL: http://archimer.ifremer.fr/doc/2006/publication-1695.pdf

Organic micropollutants (PAHs, PCBs, pesticides) in seaweeds of the lagoon of Venice
Provedor de dados: 5
Autores: Pavoni, B; Caliceti, M; Sperni, L; Sfriso, A.
Samples of seven genera of seaweeds (Ulva, Gracilaria, Porphyra, Grateloupia, Undaria, Fucus and Cystoseira), which can be used as environmental biomonitors and in several applications like human alimentation, animal feeding and cosmetics, were collected in four sampling sites in the Lagoon of Venice in spring and autumn 1999 with the aim of determining the contamination due to organic micropollutants (polychlorinated biphenyls. PCBs; chlorinated pesticides; polycyclic aromatic hydrocarbons, PAHs). On an average, most of the considered species were contaminated especially by PAHs (up to 56 ng g(-1) dry wt. (dw)) whereas concentrations of PCBs and pesticides in macroalgal tissues were significantly correlated and did not exceed 5 ng g-1 dw. Among the...
Tipo: Text
Palavras-chave: Macro-algues; Lagune de Venise; HAP; PCB; Pesticides; Seaweeds; Venice Lagoon; PAHs; PCBs; Pesticides.
Ano: 2003
URL: http://archimer.ifremer.fr/doc/00321/43250/42981.pdf

Utilisation d’espèces halieutiques exploitées comme indicateurs de la contamination chimique en zone littorale
Provedor de dados: 5
Autores: Abarnou, Alain.
The concept of biological indicator relies upon the assumption that the contamination measured in biological tissues reflects that of the aquatic environment. This study aims to update the knowledge on contamination levels of various chemical contaminants in a few exploited fish species from various areas along the French coastline. The objective of the work is to evaluate the possibility of differentiating the various coastal zones according to the contamination levels measured in fish living there. Several groups of contaminants were followed: PCBs (marker PCBs and dioxin-like PCBs), dioxins (PCCDs and PCDFs), PBDEs, PFCs and total mercury). These contaminants were mainly measured in four fish species: the sea bass (Dicentrarchus labrax), the mackerel...
Tipo: Text
Palavras-chave: Espèces indicatrices; Poisson; Environnement marin; POP; PCB; Dioxines; PBDE; PFC; Biological indicators; Fishes; Marine environment; POPs; PCBs; Dioxins; PBDEs; PFCs.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00014/12475/9315.pdf

PCB, PCDD/F and PBDE levels and profiles in crustaceans from the coastal waters of Brittany and Normandy (France)
Provedor de dados: 5
Autores: Bodin, Nathalie; Abarnou, Alain; Fraisse, D; Defour, S; Loizeau, Veronique; Le Guellec, Anne-marie; Philippon, Xavier.
Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) were analysed in the muscle of various edible marine crustaceans (spider crab, edible crab, velvet swimming crab and Norway lobster) from the Brittany and Normandy coasts (France). The highest concentrations were measured in species collected from Antifer (Seine Bay). PCB and PBDE patterns in crustacean muscles were similar and independent of the geographical area with the predominance of the high chlorinated PCBs (CB 15 3, 138, 118 and 180), and of a few PBDE congeners (BDE47, BDE99, WE 100 and BDE28). Oppositely, dioxin contamination differed with site. The major component in crustaceans from the Seine Bay was...
Tipo: Text
Palavras-chave: France; Food safety; Metabolisation; Decapod crustaceans; PBDEs; PCDD/Fs; PCBs.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2685.pdf

Organochlorinated pesticides, PCBs, dioxins, and PBDEs in grey mullets (Liza ramada) and allis shads (Alosa alosa) from the Vilaine estuary (France)
Provedor de dados: 5
Autores: Bocquene, Gilles; Abarnou, Alain.
This study aimed to compare the contamination levels of various organohalogenated compounds in two migratory fish species in the Vilaine River in western France. Organochlorinated pesticides, polychlorinated biphenyls (PCBs), dioxins (polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDDs/Fs)), and polybrominated diphenyl ethers (PBDEs) were analyzed in two diadromous species from the Vilaine estuary, the grey mullet (Liza ramada)-an amphihaline species, and the allis shad (Alosa alosa)-an anadromous species. Fish were collected in spring 2004 and spring 2005, upstream and downstream of the Arzal Dam. PCB contamination varied from 27 to 200 ng g(-1) dry weight (d.w.). PCDDs/Fs, expressed in toxicity equivalent quantity (TEQ) varied from 0.4 to 2.8 pg g(-1)...
Tipo: Text
Palavras-chave: Vilaine estuary; Organohalogenated contaminants; PCBs; DDT; Dioxins; Shad; Grey mullet; Bioaccumulation.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00124/23572/21468.pdf

Les polychlorobiphényles (PCB) en milieu marin : biogéochimie et écotoxicologie
Provedor de dados: 5
Autores: Marchand, Michel; Abarnou, Alain; Marcaillou-le Baut, Claire.
This report synthesizes the knowledge on the behaviour, bioconcentration processes and ecotoxicity ofPCB in the marine environment. Contamination levels of the French coasts are examined. Concentration levels, mechanisms andfluxes between geochemicai reservoirs are assessed. Emphasis is given on subiethai effects and toxicity mechanisms. Quality standards used in European Community countries are listed. Conclusions and recommendations for environmentai management and research are given.
Tipo: Text
Palavras-chave: PCB; Biogéochimie; Contamination; Écotoxicologie; PCBs; Biogeochemistry; Contamination; Ecotoxicology.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/00148/25954/24045.pdf

Contamination chimique du milieu marin : de la mesure à l'évaluation des risques
Provedor de dados: 5
Autores: Abarnou, Alain.
This activity report entitled (“Chemical contamination of the marine environment: from measurement to risk assessment”) summarizes the main stages my career at Ifremer from November 1975 to june 2013. The first chapter deals with the seawater chlorination and chlorinated waters released into the sea, the identification and the conditions of the formation of various by-product of these processes. The second chapter concerns PCBs, their nature, their chemical analysis in environmental matrices. PCBs are considered as the best examples of persistant and bioaccumulable compounds and therefore, in all this report they are flagship contaminants to which other groups of studied substances are compared. The third chapter refers to studies performed within marine...
Tipo: Text
Palavras-chave: Chlore; Chloration de l’eau de mer; Oxydant; Bromoforme; Impact environnemental; Mécanismes réactionnels; Désinfection; Polluants organiques persistants (POP); PCB; Dioxines; HAP; PBDE; Chlordécone; Baie de Seine; Organismes marins; Moules; Poissons; Surveillance environnementale; Analyse; Bioaccumulation; Chlorine; Seawater chlorination; Oxidizing agent; Bromoform; Environmental impact; Reaction mechanisms; Disinfection; Persitsent organic pollutants (POPs); PCBs; Dioxins; PAHs; PBDEs; Chlordecone (kepone); Baie de Seine; Marine organisms; Mussel; Fish; Environmental monitoring; Chemical analysis; Bioaccumulation.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00168/27946/26237.pdf

Responses of the European flounder (Platichthys flesus) to a mixture of PAHs and PCBs in experimental conditions
Provedor de dados: 5
Autores: Dupuy, Celie; Galland, Claire; Devaux, Alain; Bony, Sylvie; Loizeau, Veronique; Danion, Morgane; Pichereau, Vianney; Fournier, Michel; Laroche, Jean.
A multibiomarker approach was developed to evaluate the juvenile European flounder responses to a complex mixture of 9 polycyclic aromatic hydrocarbons (PAHs) and 12 polychlorinated biphenyls (PCBs). Exposure was performed through contaminated food pellets displaying: (1) PAH and PCB levels similar to those detected in the heavily polluted Seine estuary, respectively in sediments and in flatfish and (2) ten times these concentrations. Several biomarkers of the immune system (e.g., lysozyme concentration and gene expression of complement component C3 and TNF-receptor), DNA damage (e.g., Comet assay), energetic metabolism (e.g., activity of cytochrome C oxidase), detoxification process (e.g., cytochrome P450 1A1 expression level: CYP1A1; betaine homocysteine...
Tipo: Text
Palavras-chave: Mixture of contaminants; Fish; Biomarker; Immunotoxicity; Detoxification process; DNA damage; PAHs; PCBs.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00188/29914/28374.pdf

PCB concentrations in plankton size classes, a temporal study in Marseille Bay, Western Mediterranean Sea
Provedor de dados: 5
Autores: Tiano, Marion; Tronczynski, Jacek; Harmelin-vivien, Mireille; Tixier, Celine; Carlotti, Francois.
PCB levels in plankton were investigated in the Bay of Marseille, Western Mediterranean Sea, between September 2010 and October 2011. Concentrations of PCB congeners (CB 18, CB 52, CB 101, CB 118, CB 138, CB 153, CB 180) were determined in three plankton size-classes (60–200, 200–500 and 500–1000 μm) together with different parameters: chlorophyll content, plankton dry-weight biomass, carbon and nitrogen stable isotope ratios and plankton-community structure. The ∑PCB7 concentrations ranged between 14.2 and 88.1 ng g−1 d.w., for all size classes and all sampling periods. The results do not show the biomass dilution effect and indicate moderate but significant biomagnification with plankton trophic position estimated by δ15N signatures. Equilibrium with...
Tipo: Text
Palavras-chave: PCBs; Phytoplankton; Zooplankton; Bioaccumulation; Coastal; Bay of Marseille.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00218/32881/31371.pdf

Long-term food-exposure of zebrafish to PCB mixtures mimicking some environmental situations induces ovary pathology and impairs reproduction ability
Provedor de dados: 5
Autores: Daouk, Tarek; Larcher, Thibaut; Roupsard, Francois; Lyphout, Laura; Rigaud, Cyril; Ledevin, Mireille; Loizeau, Veronique; Cousin, Xavier.
Although the use of polychlorinated biphenyls (PCBs) has been banned for several decades, they are still present in the environment and are occasionally mechanically released from sediment or transferred through the trophic chain. Field analyses have established correlations between exposure to PCBs and alterations in fish physiology including reproductive function. Experimental exposures have been mainly performed using dioxin-like PCBs or other congeners at very high concentrations. However, these studies are often difficult to relate to real-life conditions. In the present study, we performed a life-cycle exposure using zebrafish model and mixtures representative of some environmental situations in terms of doses, composition and containing mainly non...
Tipo: Text
Palavras-chave: Zebrafish; PCBs; Chronic exposure; Physiology; Reproduction; Atresia.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00059/17038/14608.pdf

Modeling of PCB trophic transfer in the Gulf of Lions; 3D coupled model application
Provedor de dados: 5
Autores: Alekseenko, Elena; Thouvenin, Benedicte; Tronczynski, Jacek; Carlotti, F.; Garreau, Pierre; Tixier, Celine; Baklouti, Melika.
3D coupled modeling approach is used for the PCB dispersion assessment in the Gulf of Lion and its transfer to zooplankton via biogeochemical processes. PCB budgets and fluxes between the different species of PCB: dissolved, particulate, biosorbed on plankton, assimilated by zooplankton, which are governed by different processes: adsorption/desorption, bacteria and plankton mortality, zooplankton excretion, grazing, mineralization, volatilization have been estimated. Model outputs were compared with the available in situ data. It was found that the Rhone River outflows play an important role in the organism contamination in the coastal zone, whereas the atmospheric depositions are rather more important in the offshore zones. The transfer of the available...
Tipo: Text
Palavras-chave: PCBs; 3D coupled model; Gulf of Lions; Planktonic food web; CB153 fluxes.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00440/55177/56654.pdf

BACTERIAL DEGRADATION AND BIOREMEDIATION OF CHLORINATED HERBICIDES AND BIPHENYLS
Provedor de dados: 126
Autores: Seeger,Michael; Hernández,Marcela; Méndez,Valentina; Ponce,Bernardita; Córdova,Macarena; González,Myriam.
Chlorinated herbicides (e.g. s-triazines) and polychlorobiphenyls (PCBs) are persistent organic pollutants (POPs) that are widely distributed in the environment. s-Triazine herbicides are used in agriculture and forestry in diverse regions of the world. PCBs were produced worldwide for industrial applications, and an important amount of these compounds have been released into the environment. PCBs and s-triazines are toxic compounds that could act as endocrine disrupters and cause cancer. Therefore, environmental pollution with s-triazines and PCBs is of increasing concern. Bioremediation is an attractive technology for the decontamination of polluted sites. Microorganisms play a main role in the removal of POPs from the environment. Diverse bacteria able...
Tipo: Journal article
Palavras-chave: Bacterial degradation; I-triazines; PCBs; Catabolic genes; Genome; Bioremediation.
Ano: 2010
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162010000100007

Bioleaching of gold, copper and nickel from waste cellular phone PCBs and computer goldfinger motherboards by two Aspergillus nigerstrains
Provedor de dados: 58
Autores: Madrigal-Arias,Jorge Enrique; Argumedo-Delira,Rosalba; Alarcón,Alejandro; Mendoza-López,Ma. Remedios; García-Barradas,Oscar; Cruz-Sánchez,Jesús Samuel; Ferrera-Cerrato,Ronald; Jiménez-Fernández,Maribel.
In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment (WEEE), this research evaluated the bioleaching efficiency of gold (Au), copper (Cu) and nickel (Ni) by two strains of Aspergillus niger in the presence of gold-plated finger integrated circuits found in computer motherboards (GFICMs) and cellular phone printed circuit boards (PCBs). These three metals were analyzed for their commercial value and their diverse applications in the industry. Au-bioleaching ranged from 42 to 1% for Aspergillus niger strain MXPE6; with the combination of Aspergillus niger MXPE6 + Aspergillus niger MX7, the Au-bioleaching was 87 and 28% for PCBs and GFICMs, respectively. In contrast, the bioleaching of Cu by Aspergillus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioleaching; PCBs; Aspergillus; Gold; WEEE.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300707

Bifenilos policlorados em arroz e feijão do estado do Rio Grande do Sul
Provedor de dados: 65
Autores: Cocco,Roberta; Schwanz,Thiago Guilherme; Mohr,Susana; Ceolin,Juliana; Braga,Ana Cláudia Monteiro; Zanatta,Nilo; Costabeber,Ijoni Hilda.
Os bifenilos policlorados (PCBs) estão entre os poluentes mais tóxicos presentes no meio ambiente, apresentando os alimentos como principal fonte de exposição humana. Com base nisso, este trabalho teve como objetivo determinar os sete PCBs indicadores de contaminação ambiental em 22 amostras de arroz e 18 de feijão do estado do Rio Grande do Sul, Brasil. Além disso, objetivou-se calcular a ingestão diária estimada de resíduos, a partir da contaminação existente no arroz e feijão, assim como determinar o teor de gordura das amostras para correlacioná-lo com os níveis de PCBs. A extração e purificação dos compostos foram realizadas pelo método QuEChERS, seguido de identificação e quantificação por CG-EM. Os PCBs 153 e 101 apresentaram as maiores...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PCBs; Arroz; Feijão; Ingestão diária estimada.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000801522