dioxin-like compound Articles
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Making “the Best” Better: Toward a More Useful Method of Reporting Dioxin and Dioxin-like Compounds
On October 29, 1999, the U.S. Environmental Protection Agency (EPA) published a final rule on reporting releases of persistent, bioaccumulative, and toxic (PBT) substances under the Toxics Release Inventory (TRI).1 This rulemaking was controversial for a host of reasons, not the least of which was EPA’s decision to create the astonishingly low reporting threshold of 0.1 grams for the newly ...
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Maternally transferred dioxin‐like compounds can affect the reproductive success of European eel
Reported concentrations of dioxin‐like compounds accumulated in the European eel (Anguilla anguilla) were used to perform a risk assessment for eel larval survival, taking into account a modelled amplification of tissue concentrations with a factor of 1.33 during spawning migration. The calculated concentrations of dioxin‐like compounds finally deposited in the eggs were compared to the ...
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Dietary‐ and tissue‐based exposure of belted kingfisher to PCDFs and PCDDs in the Tittabawassee River floodplain, Midland, MI, USA
Concentrations of polychlorinated dibenzofurans (PCDFs) and other dioxin‐like compounds in soils and sediments of the Tittabawassee River and associated floodplains downstream of Midland, Michigan, USA, are greater than upstream sites. As a result of these concentrations, which are some of the greatest ever reported, a site‐specific exposure assessment of belted kingfisher breeding in the ...
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Relative sensitivities among avian species to individual and mixtures of AhR‐active compounds
Dioxins and dioxin‐like compounds (DLCs) are potent toxicants to most vertebrates. Sensitivities to DLCs vary among species. Here sensitivities of avian species (chicken [Gallus gallus], ring‐necked pheasant [Phasianus colchicus], Japanese quail [Coturnix japonica]) to some polychlorinated dibenzo‐p‐dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were determined by use of ...
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Cross‐species comparison of relative potencies and relative sensitivities of fishes to dibenzo‐p‐dioxins, dibenzofurans, and polychlorinated biphenyls in vitro
Dioxin‐like compounds (DLCs) of varying toxicities are found in complex mixtures. The toxic equivalency factor (TEF) approach was developed based on the potency of a DLC relative to the potency of TCDD to streamline risk assessment. One limitation of the TEF approach is uncertainty regarding differences in relative potency (ReP) of DLCs among different species. RePs among fishes are limited ...
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Amino acid sequence of the AHR1 ligand‐binding domain predicts avian sensitivity to dioxin like compounds: In vivo verification in European starlings
Research has demonstrated that the sensitivity of avian species to the embyrotoxic effects of dioxin‐like compounds (DLCs) can be predicted by the amino acid sequence within the ligand binding domain of the aryl hydrocarbon receptor 1 (AHR1). The domestic chicken (Gallus gallus domesticus) has been established as a highly sensitive species to the toxic effects of DLCs. Results from genotyping ...
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EPA issues notice for external peer review draft of recommended toxicity equivalency factors (TEF) for dioxin and
the U.S. Environmental Protection Agency (EPA) announced plans to convene an independent panel of experts to organize and conduct an external peer review meeting to review the draft document titled “Recommended Toxicity Equivalency Factors (TEFs) for Human Health Risk Assessments of Dioxin and Dioxin-Like Compounds.” 74 Fed. Reg. 53233. The peer review meeting took place by teleconference on ...
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Gasmet GT90 Dioxin+ Is an Effective Solution for Dioxin Sampling
In this article we introduce you to the world of continuous dioxin monitoring and the Gasmet GT90 Dioxin+, which is an exceptionally robust dioxin sampling system. Did you know that it was designed to sample even the lowest dioxin and dioxin-like compound concentrations in harsh industrial environments, even in subfreezing conditions? In addition to dioxins, the system is capable of measuring ...
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Compilation of EU Dioxin Exposure and Health Data
Introduction There is considerable public, scientific and regulatory concern over the possible adverse health effects of chronic exposure to trace levels of persistent organic pollutants. The class of compounds made up of the polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzofurans (PCDF), often collectively known as dioxins, has received widespread attention and attracted a ...
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May 2005 - Regulatory Update
The Onyx Environmental Services - Environmental, Health, Safety, and Transportation department is pleased to present the Monthly Regulatory Update. The update contains a brief summary of the proposed and final rules from EPA, OSHA, and DOT published in the Federal Register in the past calendar month. If you have any questions, comments, or suggestions regarding the Monthly Regulatory Updates, ...
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The math behind long-term dioxin sampling
Can I let you in on a secret? Your current method of measuring dioxins is probably not giving you the whole picture about your dioxin emissions. A typical waste incineration plant will run for about 8000 hours per year. Many waste incineration plants are still using the old method of periodic sampling. With periodic sampling, dioxins are only measured for 6-8 hours at a time. You don’t need ...
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