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Determination of hydrocarbon sources using n-alkane and polyaromatic hydrocarbon distribution indexes: case study: Rio de La Plata Estuary, Argentina
The chemical composition of hydrocarbon mixtures found in sediments reflects the relative contributions of different natural and manmade sources. In the vicinity of highly populated andExpand
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Behaviour of anthropogenic mercury in coastal marine sediments
Abstract The diagenetic behaviour of anthropogenic mercury accumulated in sediments of the Saguenay Fjord (Canada) was investigated. Box-cores taken along its main axis and in the St. LawrenceExpand
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Anomalous accumulation of acid-volatile sulphides (AVS) in a coastal marine sediment, Saguenay Fjord, Canada
Sulpha te reduction usually leads to the formation and accumulation of authigenic pyrite (FeS2) in organic-rich coastal marine sediments. Iron monosulphides (FeSx) are most often found as a minorExpand
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Histopathological evidence of inorganic mercury and methyl mercury toxicity in the arctic charr (Salvelinus alpinus).
In our sustained effort to understand mechanisms of mercury toxicity in fish, the histopathological effects of a 96-h acute exposure to water-borne inorganic mercury (inorganic Hg) (15 micro gL(-1)),Expand
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Effects of dietary methylmercury on liver and kidney histology in the neotropical fish Hoplias malabaricus.
Methylmercury is a potent toxic present in Amazonian fish species due to gold mining activities. In the present work, we investigated the morphological effects of methylmercury in liver and kidney ofExpand
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Green urchin as a significant source of fecal particulate organic matter within nearshore benthic ecosystems
The role of green sea urchin Strongylocentrotus droebachiensis as a source of fecal particulate organic matter (POM) for the benthic nearshore ecosystems has been studied over a 3.5-month period.Expand
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Enzymatic inhibition and morphological changes in Hoplias malabaricus from dietary exposure to lead(II) or methylmercury.
Neotropical fish traíra (Hoplias malabaricus) were used to investigate the effects of dietary doses of metals through individual exposures to either inorganic lead(II) or methylmercury, respectively,Expand
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Effects of nutrient and temperature on degradation of petroleum hydrocarbons in contaminated sub-Antarctic soil.
Mesocosm studies using sub-Antarctic soil artificially contaminated with diesel or crude oil were conducted in Kerguelen Archipelago (49 degrees 21' S, 70 degrees 13' E) in an attempt to evaluate theExpand
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Colloidal complexed silver and silver nanoparticles in extrapallial fluid of Mytilus edulis.
Metal transport in mollusk extrapallial fluid (EPF) that acts as a "bridge" between soft tissues and shell has surprisingly received little attention until now. Using ultrafiltration and radiotracerExpand
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Quantification of phenolic contents and antioxidant capacity of Atlantic sea cucumber, Cucumaria frondosa
Abstract The antioxidant activity (oxygen radical absorbance capacity, ORAC) and total phenols and flavonoids were determined in extracts from digestive tract, gonads, muscles and respiratoryExpand
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