Lake-wide distribution and depositional history of current- and past-use persistent organic pollutants in Lake Simcoe, Ontario, Canada

Helm, Paul A.; Milne, Jacquie; Hiriart-Baer, Véronique P.; Crozier, Patrick W.; Kolic, Terry; Lega, R.; Chen, Tony; MacPherson, Karen; Gewurtz, Sarah B.; Winter, Jennifer G.; Myers, Anne L.; Märvin, Chris H.; Reiner, Eric J.

doi:10.1016/j.jglr.2011.03.016

Cited by 40 publications

(12 citation statements)

References 50 publications

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“…FOSA, a PFOS precursor, showed significantly increasing trends in two sediment cores from Canada in two separate studies [70,93], which is consistent with the increasing PFOS trends observed in the same sediment cores.…”

Section: Pfsa and Pfca Precursorssupporting

confidence: 77%

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What is the effect of phasing out long-chain per- and polyfluoroalkyl substances on the concentrations of perfluoroalkyl acids and their precursors in the environment? A systematic review

Land¹,

Wit²,

Bignert³

et al. 2018

Environ Evid

167

122

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Background: There is a concern that continued emissions of man-made per-and polyfluoroalkyl substances (PFASs) may cause environmental and human health effects. Now widespread in human populations and in the environment, several PFASs are also present in remote regions of the world, but the environmental transport and fate of PFASs are not well understood. Phasing out the manufacture of some types of PFASs started in 2000 and further regulatory and voluntary actions have followed. The objective of this review is to understand the effects of these actions on global scale PFAS concentrations.Methods: Searches for primary research studies reporting on temporal variations of PFAS concentrations were performed in bibliographic databases, on the internet, through stakeholder contacts and in review bibliographies. No time, document type, language or geographical constraints were applied in the searches. Relevant subjects included human and environmental samples. Two authors screened all retrieved articles. Dual screening of 10% of the articles was performed at title/abstract and full-text levels by all authors. Kappa tests were used to test consistency. Relevant articles were critically appraised by four reviewers, with double checking of 20% of the articles by a second reviewer. Meta-analysis of included temporal trends was considered but judged to not be appropriate. The trends were therefore discussed in a narrative synthesis.

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Section: Pfsa and Pfca Precursorssupporting

confidence: 77%

“…PFOS For PFOS in abiotic samples, change points were detected in a snow core sampled in Tibet [38] and in three sediment cores sampled in Canada in two separate studies [93] (Fig. 8).…”

Section: Abiotic Samplesmentioning

confidence: 99%

What is the effect of phasing out long-chain per- and polyfluoroalkyl substances on the concentrations of perfluoroalkyl acids and their precursors in the environment? A systematic review

Land¹,

Wit²,

Bignert³

et al. 2018

Environ Evid

167

122

View full text Add to dashboard Cite

show abstract

“…PCN concentrations of 21-38 ng/g dw were found in sediment samples from Lake Ontario (Canada/USA) by Helm et al (2008), and PCN concentrations of 0.07-0.8 ng/g dw were found in sediment samples from Lake Simcoe (Canada) by Helm et al (2011). Zhao et al (2011) found PCN concentrations of 0.033-0.284 ng/g dw in sediment samples from the outer (i.e., marine) parts of the Liaohe estuary (China).…”

Section: Pcn Concentrationsmentioning

confidence: 99%

Concentrations and patterns of polychlorinated naphthalenes in surface sediment samples from Wuxi, Suzhou, and Nantong, in East China

Zhang

Dong

et al. 2015

Chemosphere

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“…Either intentionally or unintentionally, environment is continuously loading by toxic chemical compounds (xenobiotic) and metals, which released mainly through industries, in the 20 th century, thousands of organic pollutants were produced and released them into the environment [29]. Usually, oxidative damage is associated with lot of environmental factors such as weather, availability of food, competition between intra-and inter-specific species, and risk of predation; those factors are vary in different stages of life such as reproduction, hibernation, moulting, and migration; these factors put the animals long period under pressure [11].…”

Section: Discussionmentioning

confidence: 99%

Determination of acrylamide-induced chick embryo brain glutathione S-transferases expression through enzyme activity and western blot

2018

J App Biol Biotech

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Glutathione S-transferases (GSTs) are major detoxification enzymes which belong to Phase II defense enzymes; they can able to metabolize a variety of toxic chemical agents such as carcinogens, genotoxins, neurotoxins, and pesticides. Usually, GST will express when the living beings are encountered toxic chemical compounds. Acrylamide (ACR) is synthesized industrially and widely used in various industries. Usually, ACR formation occurs when food products prepared at high temperature. So that ACR is an environmental and food contaminant and it is well-proven neurotoxin. Due to highly mobile nature, birds that include poultry birds are main victims to xenobiotics (e.g., ACR) through food, water, and agricultural chemical formulas. In this study, ACR administered chick embryo brain GST activity level was assayed using 1-chloro-2,4-dinitrobenzene, and expression was assessed by western blot studies. The results show that the GST expression levels were increased in response to ACR by 24 and 48 h intervals. However, in 48 h interval, GST expression levels decreased slightly. Western blot studies also show similar pattern of GST expression. Immune blot studies showed similar GST band pattern as purification studies showed (our published work). In this study, enzyme activity and western blot analysis proved that the chick embryo brain GST was expressed more to detoxify ACR.

show abstract

Lake-wide distribution and depositional history of current- and past-use persistent organic pollutants in Lake Simcoe, Ontario, Canada

Cited by 40 publications

References 50 publications

What is the effect of phasing out long-chain per- and polyfluoroalkyl substances on the concentrations of perfluoroalkyl acids and their precursors in the environment? A systematic review

What is the effect of phasing out long-chain per- and polyfluoroalkyl substances on the concentrations of perfluoroalkyl acids and their precursors in the environment? A systematic review

Concentrations and patterns of polychlorinated naphthalenes in surface sediment samples from Wuxi, Suzhou, and Nantong, in East China

Determination of acrylamide-induced chick embryo brain glutathione S-transferases expression through enzyme activity and western blot

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