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The sources and depositional history of polycyclic aromatic hydrocarbons (PAHs) and organochlorine compounds (OCs) over the last century were investigated in sediment cores from the North Adriatic Sea (Po River prodelta) and the South-Western Adriatic Margin (SWAM). Contaminant concentrations were higher in the Po River prodelta. ∑PAHs ranged from 193 to 533 ng g, ∑PCBs ranged from 0.9 to 5.2 ng g and ∑DDTs (p,p'-DDD + p,p'-DDE) ranged from 0.1 to 2.5 ng g. In the SWAM, ∑PAHs ranged from 11 to 74 ng g while ∑PCB and ∑DDT concentrations were close to the MQL. Accordingly, contaminant fluxes were much higher in the northern (mean values of 152 ± 31 ng cm y and 0.70 ± 0.35 ng cm y for PAHs and OCs, respectively) than in the southern Adriatic (2.62 ± 0.9 ng cm y and 0.03 ± 0.02 ng cm y for PAHs and OCs, respectively). The historical deposition of PAHs seemed to be influenced by the historical socioeconomic development and by changes in the composition of fossil fuel consumption (from petroleum derivatives to natural gas) in Italy from the end of the 19th century to the present. Similarly, vertical variations in DDT concentrations matched its historical use and consumption in Italy, which started around in the mid-late 1940s to fight typhus during the II World War. Contaminant concentrations detected in sediments does not seem to pose ecotoxicological risk for marine organisms in the Adriatic Sea.
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The vertical distribution of PCBs was measured in a dated core from the continental shelf of the Korea Strait. The historical trend of deposition and fluxes of individual and total PCB agreed well wit...
This study presents four years ambient monitoring data of seventeen 2,3,7,8-chlorine substituted polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs), twelve dioxin-like polyc...
Polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs) are ubiquitous and toxic contaminants. Their atmospheric deposition fluxes on the regiona...
On July 27, 2003, a spill of approximately 31,000 tons of Iranian light crude oil affected the coast of Karachi, Pakistan. Approximately 11 years after the spill, we analyzed polycyclic aromatic hydro...
The present study was conducted to examine the potential mechanisms responsible for the distribution of polycyclic aromatic hydrocarbons (PAHs) and their oxygenated derivatives (o-PAHs) in size fracti...
This study evaluates the effect of high-flux hemodialysis compared to hemodiafiltration on small and moderate molecule substances clearance. Meanwhile, this study evaluates the effect of h...
Firefighters are at increased risk of cancer, and both inhalation and dermal routes contribute to overall exposure to carcinogens, including polycyclic aromatic hydrocarbons (PAHs). The pu...
The medium cut-off dialysis (MCO) membrane has been developed to improve middle molecule removal compared to standard high-flux dialysis filters. The aim of this study is to compare level...
Cerebral accumulation of tau and beta-amyloid are major factors of Alzheimer's disease pathology. A novel Positron Emission Tomography (PET) tracer (18-F-AV-1451) now offers the ability to...
Tissue perfusion is a critical factor for tissue regeneration and healing of anastomoses. Compromised microperfusion in the area where the anastomosis is sited likely contributes to leaks,...
The writing of history; the principles, theory, and history of historical writing; the product of historical writing. (Webster, 3d ed)
Zeolites. A group of crystalline, hydrated alkali-aluminum silicates. They occur naturally in sedimentary and volcanic rocks, altered basalts, ores, and clay deposits. Some 40 known zeolite minerals and a great number of synthetic zeolites are available commercially. (From Merck Index, 11th ed)
An acidifying agent that has expectorant and diuretic effects. Also used in etching and batteries and as a flux in electroplating.
Measurement of cells' substrate utilization and biosynthetic output for modeling of METABOLIC NETWORKS.
The state of society as it exists or in flux. While it usually refers to society as a whole in a specified geographical or political region, it is applicable also to restricted strata of a society.