Faculté des arts et des sciences – Département de sciences biologiques - Travaux et publications: Recent submissions
Now showing items 21-30 of 32
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Toxicity and subcellular fractionation of yttrium in three freshwater organisms : Daphnia magna, Chironomus riparius and Oncorhynchus mykiss
(American Chemical Society, 2019-08-15)The demand for rare earth elements (REEs) has increased since the 1990s leading to the development of many mining projects worldwide. However, less is known about how organisms can handle these metals in natural aquatic systems. Through laboratory ... -
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 becomes increasingly urgent to ... -
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 production of methylmercury. Freshwater ... -
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 body of literature suggests ... -
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 to counteract Hg toxic effects ... -
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 and degradation processes ... -
Photodemethylation of methylmercury in Eastern Canadian Arctic thaw pond and lake ecosystems
(2016-04-05)Permafrost thaw ponds of the warming Eastern Canadian Arctic are major landscape constituents and often display high levels of methylmercury (MeHg). We examined photodegradation potentials in high-dissolved organic matter (DOC) thaw ponds on Bylot ... -
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 methylation of inorganic mercury, ... -
Differential effects of plant root systems on nickel, copper and silver bioavailability in contaminated soil
(2017-02-28)A pot experiment was conducted to investigate the effect of diverse plant species (four herbaceous and four woody species) on the labile pool of six metals (Ag, Cu, Pd, Zn, Ni and Se) present in their rhizosphere. After three months of cultivation, ... -
Mercury, hydroquinone and clobetasol propionate in skin lightening products in West Africa and Canada
(2016-10-31)Skin lightening products are types of cosmetics (creams, gels, lotions and soaps) applied voluntarily on skin. Several of these products contain a variety of active ingredients that are highly toxic. Among those toxic agents, the present study focuses ...