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Now showing items 11-20 of 20
High methylmercury in Arctic and subarctic ponds is related to nutrient levels in the warming eastern Canadian Arctic
(2015-06)
Permafrost thaw ponds are ubiquitous in the eastern
Canadian Arctic, yet little information exists on their potential as
sources of methylmercury (MeHg) to freshwaters. They are
microbially active and conducive to ...
Local fungi, willow and municipal compost effectively remediate petroleum-contaminated soil in the Canadian North
(Elsevier, 2018-12-15)
Low energy-input alternatives based on locally available products are needed for treating petroleum-hydrocarbon spills in northern regions. We tested the efficacy of three local biological components (municipal compost, ...
Role of prey subcellular distribution on the bioaccumulation of yttrium (Y) in the rainbow trout
(Elsevier, 2019-12-13)
Our knowledge of the processes leading to the bioaccumulation of rare earth elements (REE) in aquatic biota is limited. As the contamination of freshwater ecosystems by anthropogenic REE have recently been reported, it ...
Relationship between extracellular low-molecular-weight thiols and mercury species in natural lake periphytic biofilms
(American chemical Society, 2015-05-26)
The uptake of mercury by microorganisms is a key step in the production of methylmercury, a biomagnifiable toxin. Mercury complexation by low molecular weight (LMW) thiols can affect its bioavailability and thus the ...
Mercury and selenium distribution in key tissues and early life stages of Yellow Perch (Perca flavescens)
(Elsevier, 2019-07-26)
Whereas early life stages are usually considered as particularly sensitive to both organic and inorganic contaminants, field studies assessing contaminant bioaccumulation in these stages are scarce. Selenium (Se) is thought ...
Environmental drivers of rare earth element bioaccumulation in freshwater zooplankton
(American Chemical Society, 2018-12-26)
Human activities have resulted in significant
release of rare earth elements (REEs) into the environment.
However, the pathways of REEs from waters and soils into
freshwater food webs remain poorly understood. Recent
studies ...
Freshwater sample preservation for the analysis of dissolved low molecular mass thiols
(Wiley, 2017)
Low molecular mass (LMM) thiols are ubiquitous organosulfur peptides that play key roles in biogeochemical element cycling. These LMM thiols, found at low concentrations in the water column, are highly sensitive to oxidation ...
Cooking and co-ingested polyphenols reduce in vitro methylmercury bioaccessibility from fish and may alter exposure in humans
MeHg bioaccessibility is reduced by food preparation
(Elsevier, 2017-10-31)
Fish consumption is a major pathway for mercury exposure in humans. Current guidelines and risk assessments assume that 100% of methylmercury (MeHg) in fish is absorbed by the human body after ingestion. However, a growing ...
An ecological microsystem to treat waste oil contaminated soil: Using phytoremediation assisted by fungi and local compost, on a mixed-contaminant site, in a cold climate
(Elsevier, 2019-03-29)
As a result of anthropization and industrialization, northern remote communities face issues of soil contamination by mixtures of organic and inorganic contaminants. Soil bioremediation in cold environments is particularly ...
The fish or the egg : maternal transfer and subcellular partitioning of mercury and selenium in Yellow Perch (Perca flavescens)
(Elsevier, 2019-04-17)
Mercury (Hg) is a trace element of particular concern since it is ubiquitous in the environment and because its methylated form (MeHg) readily bioaccumulates and biomagnifies in food webs. This latter process leads to ...