1,721,724 research outputs found
Toxicity assessment of polychlorinated biphenyl isomers including non-ortho coplanar PCBs in Cetaceans from the Mediterranean Sea
No full textHistory, development and environmental features of the Orbetello lagoon: a summary of knowledges aquired by the research centre Ecolab
No full textPolybrominated diphenyl ethers and polychlorobiphenyls in fish from the Ionian Sea (Western Mediterranean
No full textThis study reports on the accumulation of polybrominated diphenyl ethers (PBDEs) and polychlorobiphenyls (PCBs) in the muscle tissue of 11 species of fish from the Ionian Sea (Western Mediterranean). The results are consistent with previous studies that have reported now-generalized contamination by PCBs of the Mediterranean marine environment, as well as widespread diffusion of emerging contaminants such as polybrominated diphenyl ethers (PBDEs). The West-ern Mediterranean Sea, from which the 11 fish species were collected, receives a heavy pollutant input from the urban and industrial areas along its coasts. Higher values of PCBs (average over 1.5 mg/kg f.w.) were observed in pelagic top predators (little tuna, bluefin tuna and swordfish). These same species also showed higher levels of PBDEs, averaging above 0.5 ng/g f.w. This puts a few fish species at the top of the food chain—such as bluefin tuna and swordfish—at particular risk, and the importance of these species in the human diet suggests the need for particular care in our food choices
Nonylphenol in a lagoon environment: 4-nonylphenol and nonylphenol ethoxylates in fish tissues
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"Self-Organized Criticality and Phase Locking in Models of Production and Inventory Dynamics"
No full textComplementary accumulation of selenium and mercury in fish muscle
No full textThe concentrations of total selenium and total mercury in the muscle of striped mullet from four stations in the Northern Tyrrhenian Sea and one in the Black Sea were analyzed. If the sum of the concentrations of mercury and selenium (expressed as nmoles/g) is plotted against the age of the specimens, a single function describes all of the results. The explanation suggested by the authors is that SeHg receptors exist and increase with the age of the animal. These receptors may be occupied by mercury in proportion to its concentration in the environment. © 1982
Levels of Polybrominated Diphenyl Ethers in Commercial Food in Siena Province (Tuscany, Italy)
No full textThis study reports on the presence and levels of polybrominated diphenyl ethers (PBDEs) in food items collected during
the period 2004-2010 in commercial food shops in Siena (Southern Tuscany, Central Italy), in order to evaluate risk to humans due to food consumption. We have considered the following eight PBDE congeners to be of primary interest: BDE28, BDE47, BDE99, BDE100, BDE153, BDE154, BDE183 and BDE209. The overall results clearly show a strong difference in concentration of PBDEs between seafood and food from the terrestrial trophic web. PBDE concentrations in commercial food from terrestrial origin vary from an average of 156 pg g-1 fat in chicken breast (6 pg g-1 fresh weight) to an average of 404 pg g-1 fat in butter (125 pg g-1 f.w.). In seafood, average values are comprised between 174 pg g-1 f.w. in hake to 692 pg g-1 f.w. in swordfish. In several samples of swordfish PBDE values are higher than 1 ng g-1 f.w. If we consider PBDE congeners individually, BDE47 is the predominant one in seafood, with percentages above 50% in all species. In commercial food of terrestrial origin, BDE47 is predominant in beef, pork, bacon, butter and sausage (27%-35%), followed by BDE209 (25%-28%). In chicken breast, eggs and cow’s milk, BDE209 is predominant (28%-32%) followed by BDE47 (25%-30%). The level of PBDEs found in bluefin tuna and swordfish, considering their importance in the human diet, suggests the need for particular care in our food choices
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