Derek C G Muir

Summary

Country: Canada

Publications

  1. ncbi Contaminants in Canadian arctic biota and implications for human health: conclusions and knowledge gaps
    Derek C G Muir
    National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, ON, Canada L7R 4A6
    Sci Total Environ 351:539-46. 2005
  2. ncbi Are there other persistent organic pollutants? A challenge for environmental chemists
    Derek C G Muir
    Water Science and Technology Directorate, Environment Canada, Burlington, Ontario, Canada
    Environ Sci Technol 40:7157-66. 2006
  3. ncbi Poly and perfluorinated carboxylates in North American precipitation
    Brian F Scott
    Aquatic Ecosystem Protection Research Division, Environment Canada, 867 Lakeshore Road, Burlington, Ontario, Canada
    Environ Sci Technol 40:7167-74. 2006
  4. ncbi Fractionation and bioaccumulation of perfluorooctane sulfonate (PFOS) isomers in a Lake Ontario food web
    Magali Houde
    Aquatic Ecosystem Protection Research Division, Water Science and Technology Directorate, Environment Canada, Burlington, Ontario, Canada
    Environ Sci Technol 42:9397-403. 2008
  5. ncbi Target tissue selectivity and burdens of diverse classes of brominated and chlorinated contaminants in polar bears (Ursus maritimus) from East Greenland
    Wouter A Gebbink
    Science and Technology Branch, National Wildlife Research Centre, Environment Canada, Carleton University, Ottawa, Ontario K1A OH3, Canada
    Environ Sci Technol 42:752-9. 2008
  6. ncbi Pesticides in western Canadian mountain air and soil
    Gillian L Daly
    Department of Chemistry and Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, Canada
    Environ Sci Technol 41:6020-5. 2007
  7. ncbi Organochlorine pesticides in the soils and atmosphere of Costa Rica
    Gillian L Daly
    Department of Chemistry, University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario, Canada
    Environ Sci Technol 41:1124-30. 2007
  8. ncbi Tissue-specific congener composition of organohalogen and metabolite contaminants in East Greenland polar bears (Ursus maritimus)
    Wouter A Gebbink
    National Wildlife Research Centre, Science and Technology Branch, Environment Canada, Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada
    Environ Pollut 152:621-9. 2008
  9. doi Regional contamination versus regional dietary differences: understanding geographic variation in brominated and chlorinated contaminant levels in polar bears
    Melissa A McKinney
    Ecotoxicology and Wildlife Health Division, Science and Technology Branch, Environment Canada, Ottawa, Ontario K1A 0H3, Canada
    Environ Sci Technol 45:896-902. 2011
  10. doi Comparison of concentrations and stereoisomer ratios of mecoprop, dichlorprop and metolachlor in Ontario streams, 2006-2007 vs. 2003-2004
    Perihan Binnur Kurt-Karakus
    Center for Atmospheric Research Experiments, Environment Canada, 6248 Eighth Line, Egbert, L0L 1N0 ON, Canada
    Environ Pollut 158:1842-9. 2010

Detail Information

Publications94

  1. ncbi Contaminants in Canadian arctic biota and implications for human health: conclusions and knowledge gaps
    Derek C G Muir
    National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, ON, Canada L7R 4A6
    Sci Total Environ 351:539-46. 2005
    ..Application of this information in international forums to reduce anthropogenic emissions of contaminants to the environment is also discussed...
  2. ncbi Are there other persistent organic pollutants? A challenge for environmental chemists
    Derek C G Muir
    Water Science and Technology Directorate, Environment Canada, Burlington, Ontario, Canada
    Environ Sci Technol 40:7157-66. 2006
    ..However, to improve these predictions data on emissions from end use are needed to refine environmental fate predictions, and analytical methods may need to be developed...
  3. ncbi Poly and perfluorinated carboxylates in North American precipitation
    Brian F Scott
    Aquatic Ecosystem Protection Research Division, Environment Canada, 867 Lakeshore Road, Burlington, Ontario, Canada
    Environ Sci Technol 40:7167-74. 2006
    ..S. sites indicate highly populated urban areas in the New York to Washington corridor as the main sources of PFOA, although low PFOA levels associated with air masses coming off the Atlantic Ocean imply multiple sources...
  4. ncbi Fractionation and bioaccumulation of perfluorooctane sulfonate (PFOS) isomers in a Lake Ontario food web
    Magali Houde
    Aquatic Ecosystem Protection Research Division, Water Science and Technology Directorate, Environment Canada, Burlington, Ontario, Canada
    Environ Sci Technol 42:9397-403. 2008
    ..3 +/- 0.17 to 2.6 +/- 0.51), whereas dimethyl-PFOS showed no biomagnification. The results illustrate the important influence of molecular structure on the bioaccumulation of perfluoroalkyl sulfonates...
  5. ncbi Target tissue selectivity and burdens of diverse classes of brominated and chlorinated contaminants in polar bears (Ursus maritimus) from East Greenland
    Wouter A Gebbink
    Science and Technology Branch, National Wildlife Research Centre, Environment Canada, Carleton University, Ottawa, Ontario K1A OH3, Canada
    Environ Sci Technol 42:752-9. 2008
    ..MeO and OH groups). The tissue- and blood-specific accumulation (or retention) among organohalogen classes indicates that exposure and any potential contaminant-mediated effects in these polar bears are likely tissue or blood specific...
  6. ncbi Pesticides in western Canadian mountain air and soil
    Gillian L Daly
    Department of Chemistry and Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, Canada
    Environ Sci Technol 41:6020-5. 2007
    ..Highest pesticide concentrations are thus found intemperate mountain soils that are rich in organic matter and receive large amounts of cold precipitation...
  7. ncbi Organochlorine pesticides in the soils and atmosphere of Costa Rica
    Gillian L Daly
    Department of Chemistry, University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario, Canada
    Environ Sci Technol 41:1124-30. 2007
    ..The study demonstrates an approach for quickly evaluating the spatial distribution of OCPs in an understudied area, identifying regionally important contaminants and areas of elevated concentrations...
  8. ncbi Tissue-specific congener composition of organohalogen and metabolite contaminants in East Greenland polar bears (Ursus maritimus)
    Wouter A Gebbink
    National Wildlife Research Centre, Science and Technology Branch, Environment Canada, Department of Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada
    Environ Pollut 152:621-9. 2008
    ..Our findings suggest that different congener pattern exposures to these classes of contaminants should be considered with respect to potential target tissue-specific effects in East Greenland polar bears...
  9. doi Regional contamination versus regional dietary differences: understanding geographic variation in brominated and chlorinated contaminant levels in polar bears
    Melissa A McKinney
    Ecotoxicology and Wildlife Health Division, Science and Technology Branch, Environment Canada, Ottawa, Ontario K1A 0H3, Canada
    Environ Sci Technol 45:896-902. 2011
    ..Understanding diet/food web factors is important to accurately interpret contaminant trends, particularly in a changing Arctic...
  10. doi Comparison of concentrations and stereoisomer ratios of mecoprop, dichlorprop and metolachlor in Ontario streams, 2006-2007 vs. 2003-2004
    Perihan Binnur Kurt-Karakus
    Center for Atmospheric Research Experiments, Environment Canada, 6248 Eighth Line, Egbert, L0L 1N0 ON, Canada
    Environ Pollut 158:1842-9. 2010
    ..Low concentrations were associated with lower and more variable SFs, suggesting mixed input of racemic and S-metolachlor or stereoselective degradation...
  11. ncbi Biomagnification of perfluoroalkyl compounds in the bottlenose dolphin (Tursiops truncatus) food web
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 40:4138-44. 2006
    ..The results indicate that using plasma and liver PFC concentrations as surrogate to whole body burden in a top marine predator overestimates the BMFs and TMFs...
  12. doi Detection of a cyclic perfluorinated acid, perfluoroethylcyclohexane sulfonate, in the Great Lakes of North America
    Amila O De Silva
    Water Science and Technology Directorate, Environment Canada, 867 Lakeshore Road, Burlington, ON Canada L7R 4A6
    Environ Sci Technol 45:8060-6. 2011
    ..5 for PFOS. It is not certain whether the fish-water BAF for PFECHS is an overestimate due to the influence of precursor biotransformation. Further studies are recommended to understand the extent of PFECHS contamination...
  13. ncbi Mercury and other trace elements in a pelagic Arctic marine food web (Northwater Polynya, Baffin Bay)
    Linda M Campbell
    National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, Ontario, Canada, L7R 4A6
    Sci Total Environ 351:247-63. 2005
    ....
  14. ncbi Spatial trends of perfluoroalkyl compounds in ringed seals (Phoca hispida) from the Canadian Arctic
    Craig M Butt
    Department of Chemistry, University of Toronto, Toronto, Ontario, Canada
    Environ Toxicol Chem 27:542-53. 2008
    ..After adjusting for delta13C values, concentrations of most PFCs generally were statistically greater in the Grise Fiord, Qikiqtarjuaq, Arviat, and Nain populations...
  15. ncbi Polychlorinated biphenyls and hydroxylated polychlorinated biphenyls in plasma of bottlenose dolphins (Tursiops truncatus) from the Western Atlantic and the Gulf of Mexico
    Magali Houde
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 40:5860-6. 2006
    ..Results from this study show that OH-PCB are important environmental contaminants in dolphins and suggest that PCBs, decades after their ban, may still constitute a threat to wildlife...
  16. ncbi Seasonally resolved concentrations of persistent organic pollutants in the global atmosphere from the first year of the GAPS study
    Karla Pozo
    Atmospheric Science and Technology Directorate, Environment Canada, 4905 Dufferin Street, Toronto, Ontario, Canada
    Environ Sci Technol 43:796-803. 2009
    ..Globally resolved data will also foster the development and validation of global transport models for POPs, and the investigation of seasonal and interannual trends in concentrations of POPs in the global atmosphere...
  17. ncbi Enantiomer-specific accumulation of PCB atropisomers in the bowhead whale (Balaena mysticetus)
    Paul F Hoekstra
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 36:1419-25. 2002
    ..Results suggest that enantioselective accumulation of PCB-91, 95, and 149 is influenced by PCB concentrations, age, and/or the modification of an uncharacterized stereoselective process (or processes) during sexual maturity...
  18. doi Distribution of perfluorocarboxylate isomers in select samples from the North American environment
    Amila O De Silva
    University of Toronto, Department of Chemistry, Toronto, Ontario, Canada
    Environ Toxicol Chem 28:1801-14. 2009
    ..The presence of longer-chain isopropyl isomers may be preliminary evidence of isopropyl fluorinated organic precursors...
  19. ncbi Hydroxylated PCBs and other chlorinated phenolic compounds in lake trout (Salvelinus namaycush) blood plasma from the Great Lakes region
    Linda M Campbell
    National Water Research Institute, Environment Canada, Burlington, Ontario L7R 4A6, Canada
    Environ Sci Technol 37:1720-5. 2003
    ..3 and 27.7 pg/g), and 4'-OH-CB208 (24.5 and 34.7 pg/g) were found in lake trout from Lake Ontario and Lake Superior, respectively. Future studies to delineate the sources and impacts of CPCs in the Great Lakes catchment are needed...
  20. ncbi Metolachlor and atrazine in the great lakes
    Perihan B Kurt-Karakus
    Science and Technology Branch, Environment Canada, 867 Lakeshore Road, Burlington, L7R 4A6, ON, Canada
    Environ Sci Technol 44:4678-84. 2010
    ..The lower SFs in lakes suggest in-lake stereoselective processing of metolachlor or hold-up of older racemic metolachlor residues...
  21. ncbi Polymeric brominated flame retardants: are they a relevant source of emerging brominated aromatic compounds in the environment?
    Bruno Gouteux
    Aquatic Ecosystem Protection Research Division, Environment Canada, Burlington, ON, Canada
    Environ Sci Technol 42:9039-44. 2008
    ..However, these model predictions suffered from a lack of information on the actual use of polymeric BFRs. Hence, further work is needed to assess the release of potentially persistent brominated aromatic compounds from polymeric BFRs...
  22. ncbi Toward a global network for persistent organic pollutants in air: results from the GAPS study
    Karla Pozo
    Science and Technology Branch, Environment Canada, Toronto, Ontario
    Environ Sci Technol 40:4867-73. 2006
    ..GM concentrations (pg/m3) were 17 for PCBs and 4 for PBDEs. Sampling under GAPS will continue and will eventually allow seasonality effects and longer-term temporal and spatial trends to be evaluated...
  23. doi Perfluoroalkyl contaminants in Lake Ontario Lake Trout: detailed examination of current status and long-term trends
    Sarah B Gewurtz
    Environment Canada, Water Science and Technology Directorate, 867 Lakeshore Road, Burlington, Ontario, Canada L7R 4A6
    Environ Sci Technol 46:5842-50. 2012
    ..The results of this study emphasize the importance of long-term monitoring for assessing the effectiveness of bans and phase-outs on PFCs in the environment...
  24. ncbi Analysis for perfluorocarboxylic acids/anions in surface waters and precipitation using GC--MS and analysis of PFOA from large-volume samples
    Brian F Scott
    Environment Canada, National Water Research Institute, Aquatic Ecosystem Protection, Research Branch, 867 Lakeshore Road, Burlington, Ontario, Canada, L7R 4A6
    Environ Sci Technol 40:6405-10. 2006
    ..01 ng/L. This method was applied to Lake Superior samples which produced good agreement for C6-C9 PFCAs between regular analysis (GC-MS) and the XAD-7 followed by GC-MS analysis...
  25. ncbi Polychlorinated naphthalenes in the Global Atmospheric Passive sampling (GAPS) study
    Sum Chi Lee
    Science and Technology Branch, Environment Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada
    Environ Sci Technol 41:2680-7. 2007
    ..The relative contribution by combustion sources and emissions from technical PCN mixtures is expected to vary among sites since it depends on the combustion sources and the technical mixture used in a particular country or region...
  26. doi Persistent halogenated organic contaminants and mercury in northern fulmars (Fulmarus glacialis) from the Canadian Arctic
    Birgit M Braune
    Environment Canada, National Wildlife Research Centre, Carleton University, Raven Road, Ottawa, Ontario, Canada K1A 0H3
    Environ Pollut 158:3513-9. 2010
    ..TEQ was comprised mainly of ΣTEQ(PCDF). Concentrations of Hg and the persistent halogenated compounds reported in this study were below published toxicological threshold values for wild birds...
  27. ncbi Brominated flame retardants in polar bears (Ursus maritimus) from Alaska, the Canadian Arctic, East Greenland, and Svalbard
    Derek C G Muir
    National Water Research Institute, Environment Canada, Burlington, Ontario, Canada
    Environ Sci Technol 40:449-55. 2006
    ..Significantly lower sigmaPBDE concentrations were found in fat of bears from Canada and Alaska (means ranging from 7.6 to 22 ng/g lw)...
  28. ncbi Contaminants in Canadian Arctic biota and implications for human health: preface
    Derek C G Muir
    National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, Canada ON L7R 4A6
    Sci Total Environ 351:1-3. 2005
  29. ncbi Distribution and transportability of hexabromocyclododecane (HBCD) in the Asia-Pacific region using skipjack tuna as a bioindicator
    Daisuke Ueno
    National Water Research Institute, Environment Canada, 867 Lakeshore Road, P O Box 5050, Burlington ON L7R 4A6, Canada
    Environ Pollut 144:238-47. 2006
    ..The estimated empirical 1/2 distance for alpha-HBCD was 8500 km, which is one of the highest atmospheric transportability among various halogenated persistent organic pollutants (POPs)...
  30. doi Polybrominated diphenyl ethers and their hydroxylated analogs in plasma of bottlenose dolphins (Tursiops truncatus) from the United States east coast
    Magali Houde
    Aquatic Ecosystem Protection Research Division, Water Science and Technology Directorate, Environment Canada, Burlington, Ontario L7R 4A6, Canada
    Environ Toxicol Chem 28:2061-8. 2009
    ....
  31. ncbi Altered thyroid status in lake trout (Salvelinus namaycush) exposed to co-planar 3,3',4,4',5-pentachlorobiphenyl
    Scott B Brown
    National Water Research Institute, Environment Canada, P O Box 5050, Burlington, Ont, Canada L7G 4A6
    Aquat Toxicol 67:75-85. 2004
    ..These changes may be of significance when T4 requirements are high for other reasons (e.g. periods of rapid growth, warm temperatures, metamorphosis, and parr-smolt transformation)...
  32. ncbi Variation in organochlorine bioaccumulation by a predatory fish; gender, geography, and data analysis methods
    Thomas A Johnston
    Great Lakes Laboratory for Fisheries and Aquatic Sciences, Department of Fisheries and Oceans, Burlington, Ontario, Canada
    Environ Sci Technol 36:4238-44. 2002
    ..The gender composition of fish samples and the type and level of covariate used in statistical analyses should be considered in studies of spatiotemporal variation in organochlorine bioaccumulation in fish...
  33. doi Deposition of brominated flame retardants to the Devon Ice Cap, Nunavut, Canada
    Torsten Meyer
    Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, Ontario, M1C 1A4, Canada
    Environ Sci Technol 46:826-33. 2012
    ....
  34. doi Trends of legacy and new persistent organic pollutants in the circumpolar arctic: overview, conclusions, and recommendations
    Derek C G Muir
    Aquatic Ecosystem Protection Research Division, Environment Canada, Burlington, ON, Canada
    Sci Total Environ 408:3044-51. 2010
    ..The articles in this special issue summarize the peer reviewed literature and selected technical reports on trends of concentrations and possible biological effects of POPs in the Arctic published up to early 2009...
  35. ncbi Accumulation of current-use pesticides in neotropical montane forests
    Gillian L Daly
    Department of Chemistry, University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario, Canada
    Environ Sci Technol 41:1118-23. 2007
    ....
  36. ncbi Dietary accumulation and biochemical responses of juvenile rainbow trout (Oncorhynchus mykiss) to 3,3',4,4',5-pentachlorobiphenyl (PCB 126)
    Scott B Brown
    Environment Canada, National Water Research Institute, 867 Lakeshore Blvd, PO Box 5050, Ont, L7R 4A6, Burlington, Canada
    Aquat Toxicol 59:139-52. 2002
    ..This indicates that the functional competences of the physiological factors associated with growth were maintained under the experimental conditions...
  37. ncbi Biological monitoring of polyfluoroalkyl substances: A review
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 40:3463-73. 2006
    ..Continuous monitoring with key sentinel species and standardization of analytical methods are recommended...
  38. ncbi PCBs and organochlorine pesticides in blubber biopsies from free-ranging St. Lawrence River Estuary beluga whales (Delphinapterus leucas), 1994-1998
    Karen E Hobbs
    National Water Research Institute, Environment Canada, ON, L7R 4A6, Burlington, Canada
    Environ Pollut 122:291-302. 2003
    ..It also appears that measuring contaminant concentrations only in stranded whales, may overestimate OC levels in the population as a whole, especially for highly chlorinated OCs...
  39. doi Environmental fate of three novel brominated flame retardants in aquatic mesocosms
    Benjamin P de Jourdan
    School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 32:1060-8. 2013
    ..The ratio of EHTeBB to BEHTBP differed in the mesocosm compartments compared with the technical product used for treatment, indicating increased degradation of EHTeBB relative to BETHBP...
  40. doi Monitoring of perfluorinated compounds in aquatic biota: an updated review
    Magali Houde
    Environment Canada, Centre Saint Laurent, 105 McGill Street, Montréal, Québec, Canada, H2Y 2E7
    Environ Sci Technol 45:7962-73. 2011
    ....
  41. ncbi Bioaccumulation and trophic magnification of short- and medium-chain chlorinated paraffins in food webs from Lake Ontario and Lake Michigan
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada, Laval, Qudbec, H7C 2M7, Canada
    Environ Sci Technol 42:3893-9. 2008
    ..Given the prominence of CPs, particularly in lake waters and in lower food web organisms, further investigation is needed to evaluate the magnitude of their distribution and accumulation/magnification in the Great Lakes environment...
  42. ncbi Biotransformation pathways of fluorotelomer-based polyfluoroalkyl substances: a review
    Craig M Butt
    Department of Chemistry, University of Toronto, Ontario, Canada
    Environ Toxicol Chem 33:243-67. 2014
    ..The PAPs compounds and 8:2 FTAC were shown to be direct precursors to FTOHs and thus follow similar degradation pathways...
  43. ncbi Factors influencing legacy pollutant accumulation in alpine osprey: biology, topography, or melting glaciers?
    John E Elliott
    Wildlife and Landscape Science Directorate, Environment Canada, Delta, BC, Canada
    Environ Sci Technol 46:9681-9. 2012
    ..Our study highlights the importance of understanding how biological processes integrate physical when studying the environmental chemistry of wildlife...
  44. ncbi Rainbow trout (Oncorhynchus mykiss) can eliminate chiral organochlorine compounds enantioselectively
    Charles S Wong
    Department of Chemistry, University of Toronto, Ontario, Canada
    Environ Sci Technol 36:1257-62. 2002
    ..This study highlights the potential of chiral analysis as a tracer of in vivo biotransformation processes of xenobiotic compounds...
  45. ncbi Fathead minnow (Pimephales promelas Rafinesque) exposure to three novel brominated flame retardants in outdoor mesocosms: bioaccumulation and biotransformation
    Benjamin P de Jourdan
    University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 33:1148-55. 2014
    ..The authors conclude that these NBFRs have the potential to be bioaccumulative and persistent in vivo and, therefore, warrant further study of physiological effects linked to chronic, sublethal responses...
  46. doi Mass-dependent and mass-independent variations in the isotope composition of mercury in a sediment core from a lake polluted by emissions from the combustion of coal
    Togwell A Jackson
    Aquatic Ecosystem Protection Research Division, Water Science and Technology Directorate, Environment Canada, Canada Centre for Inland Waters, 867 Lakeshore Road, PO Box 5050, Burlington, Ontario, Canada L7R 4A6
    Sci Total Environ 417:189-203. 2012
    ..In brief, the isotope signature of the polluted sediment is probably the net result of abiotic reactions at the sources of pollution, microbial activities in the lake, and effects of toxic pollutants on the microflora...
  47. ncbi Estrogenic activity of dicofol with the human estrogen receptor: Isomer- and enantiomer-specific implications
    Paul F Hoekstra
    National Water Research Institute, Environment Canada, Burlington, ON, Canada
    Chemosphere 64:174-7. 2006
    ....
  48. ncbi Historical variations in the stable isotope composition of mercury in Arctic lake sediments
    Togwell A Jackson
    Aquatic Ecosystem Protection Research Branch, National Water Research Institute, Environment Canada, 867 Lakeshore Road, PO Box 5050, Burlington, Ontario L7R 4A6, Canada
    Environ Sci Technol 38:2813-21. 2004
    ..These findings imply that variations in the isotopic makeup of Hg, together with related physical, chemical, and biological data, could yield important new information about the biogeochemical cycle of Hg...
  49. ncbi Empirical and modeling evidence of regional atmospheric transport of current-use pesticides
    Derek C G Muir
    National Water Research Institute, Environment Canada, Burlington, Ontario L7R 4A6, Canada
    Environ Toxicol Chem 23:2421-32. 2004
    ....
  50. ncbi Chiral current-use herbicides in Ontario streams
    Perihan Binnur Kurt-Karakus
    Center for Atmospheric Research Experiments, Environment Canada, 6248 Eighth Line, Egbert L0L 1N0, Ontario, Canada
    Environ Sci Technol 42:8452-8. 2008
    ..S/R values were significantly higher (p < 0.001) in agricultural than urban watersheds. Streamwater from row crop areas showed higher S/R ratios than streamwater from fruit growing areas (p = 0.036)...
  51. ncbi Distribution of haloacetic acids in the water columns of the Laurentian Great Lakes and Lake Malawi
    Brian F Scott
    National Water Research Institute, Environment Canada, Burlington, Ontario
    Environ Sci Technol 36:1893-8. 2002
    ..Generally, high HAA levels paralleled the degree of industrial activity in the adjacent waters...
  52. ncbi Monitoring perfluorinated surfactants in biota and surface water samples following an accidental release of fire-fighting foam into Etobicoke Creek
    Cheryl A Moody
    Department of Chemistry, University of Toronto, Ontario, Canada
    Environ Sci Technol 36:545-51. 2002
    ..The residence time of perfluorooctanesulfonate in Etobicoke Creek as well as the high bioaccumulation in fish liver suggests that perfluorinated surfactants will persist and bioaccumulate following release into the aquatic environment...
  53. ncbi Spatial trends and bioaccumulation of organochlorine pollutants in marine zooplankton from the Alaskan and Canadian Arctic
    Paul F Hoekstra
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Toxicol Chem 21:575-83. 2002
    ....
  54. ncbi Atmospheric deposition of mercury and methylmercury to landscapes and waterbodies of the athabasca oil sands region
    Jane L Kirk
    Aquatic Contaminants Research Division, Environment Canada, Burlington, Ontario L7R 4A6, Canada
    Environ Sci Technol 48:7374-83. 2014
    ..Our results suggest that at snowmelt, a complex mixture of chemicals enters aquatic ecosystems that could impact biological communities of the oil sands region. ..
  55. ncbi Prevalence of long-chained perfluorinated carboxylates in seabirds from the Canadian Arctic between 1975 and 2004
    Craig M Butt
    Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
    Environ Sci Technol 41:3521-8. 2007
    ..Finally, the detection of the 8:2 and 10:2 FTUCAs in seabirds is suggestive of fluorotelomer alcohols as a source of some PFCAs...
  56. ncbi Geographic distribution of selected elements in the livers of polar bears from Greenland, Canada and the United States
    Scott A Rush
    University of Georgia, Warnell School of Forestry and Natural Resources, Athens, GA 30602 2152, USA
    Environ Pollut 153:618-26. 2008
    ..Concentrations of most elements in the polar bears did not exceed toxicity thresholds, although Cd and Hg exceeded levels correlated with the formation of hepatic lesions in laboratory animals...
  57. ncbi Identification of long-chain perfluorinated acids in biota from the Canadian Arctic
    Jonathan W Martin
    Department of Chemistry, University of Toronto, 80 St George Street, Lash Miller Building, Toronto, Ontario M5S 3H6, Canada
    Environ Sci Technol 38:373-80. 2004
    ..Future studies should continue to monitor all fluorinated contaminants and examine the absolute and relative toxicities for this novel suite of PFCAs...
  58. ncbi An assessment of the toxicological significance of anthropogenic contaminants in Canadian arctic wildlife
    Aaron T Fisk
    Warnell School of Forest Resources, University of Georgia, Athens, GA 30602 2152, USA
    Sci Total Environ 351:57-93. 2005
    ....
  59. ncbi Perfluoroalkyl contaminants in the Canadian Arctic: evidence of atmospheric transport and local contamination
    Naomi L Stock
    Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
    Environ Sci Technol 41:3529-36. 2007
    ..1 to 5.9 pg/m3). In addition, results of this study also indicate that local perfluoroalkyl contamination of Resolute Lake, which is located downstream of an airport wastewater input, has occurred...
  60. doi Organochlorine-induced histopathology in kidney and liver tissue from Arctic fox (Vulpes lagopus)
    Christian Sonne
    Section for Contaminants, Effects and Marine Mammals, Department of Arctic Environment, National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, PO Box 358, DK 4000 Roskilde, Denmark
    Chemosphere 71:1214-24. 2008
    ..Whether such lesions may have an impact on age and health of the animals remains uncertain...
  61. doi Levels and temporal trends of HCH isomers in ringed seals from West and East Greenland
    Frank Riget
    National Environmental Research Institute, University of Aarhus, Frederiksborgvej 399, DK 4000 Roskilde, Denmark
    J Environ Monit 10:935-40. 2008
    ..Similar levels and trends in East and West Greenland support the general understanding of the pathways of HCH isomers to and in the Arctic...
  62. ncbi Measurement of 13C/12C of chloroacetic acids by gas chromatography/combustion/isotope ratio mass spectrometry
    Charles S Wong
    Department of Chemistry, University of Toronto, 80 St George St, Ont, M5S 3H6, Toronto, Canada
    Chemosphere 50:903-9. 2003
    ..Our results underscore the potential of stable isotopes to serve as tracers of environmental sources of CAAs...
  63. ncbi Circumpolar study of perfluoroalkyl contaminants in polar bears (Ursus maritimus)
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Sci Technol 39:5517-23. 2005
    ....
  64. ncbi Bioaccumulation of PCBs in Arctic seabirds: influence of dietary exposure and congener biotransformation
    Katrine Borgå
    Norwegian Polar Institute, N 9296 Tromsø, Norway
    Environ Pollut 134:397-409. 2005
    ....
  65. ncbi Perfluoroalkyl contaminants in a food web from Lake Ontario
    Jonathan W Martin
    Department of Chemistry, University of Toronto, Toronto, Ontario M5S 3H6, Canada
    Environ Sci Technol 38:5379-85. 2004
    ....
  66. ncbi Biological and chemical factors of importance in the bioaccumulation and trophic transfer of persistent organochlorine contaminants in Arctic marine food webs
    Katrine Borgå
    Norwegian Polar Institute, Polar Environmental Centre, N 9296 Tromsø, Norway
    Environ Toxicol Chem 23:2367-85. 2004
    ..This reduces biological validity of the models and may be particularly problematic in a highly seasonal environment, such as the Arctic Ocean...
  67. ncbi A world model, a model world
    Frank A P C Gobas
    Environ Toxicol Chem 23:2279-80. 2004
  68. ncbi Analytical challenges hamper perfluoroalkyl research
    Jonathan W Martin
    University of Toronto, Canada
    Environ Sci Technol 38:248A-255A. 2004
  69. ncbi Collection of airborne fluorinated organics and analysis by gas chromatography/chemical ionization mass spectrometry
    Jonathan W Martin
    Department of Environmental Biology, University of Guelph, Ontario
    Anal Chem 74:584-90. 2002
    ..Low concentrations of fluoroorganics were consistently detected in blanks (<4 pg m(-3)); however, this did not prevent confirmation or quantification of environmental concentrations...
  70. ncbi Vapor pressures of the fluorinated telomer alcohols--limitations of estimation methods
    Naomi L Stock
    Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario, M5S 3H6 Canada
    Environ Sci Technol 38:1693-9. 2004
    ..It appears likely that the unique molecular geometry of the FTOHs influences not only their vapor pressure but also other physical properties and hence environmental fate and dissemination...
  71. ncbi Polyfluorinated telomer alcohols and sulfonamides in the North American troposphere
    Naomi L Stock
    Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
    Environ Sci Technol 38:991-6. 2004
    ..The nonuniform nature of the spatial distribution of both polyfluorinated sulfonamides and FTOHs is indicative of the importance of point sources for the dissemination of these contaminants in the North American troposphere...
  72. ncbi Levels and temporal trends of toxaphene congeners in beluga whales (Delphinapterus leucas) from the St. Lawrence Estuary, Canada
    Bruno Gouteux
    Institut des Sciences de la Mer, Universite du Quebec a Rimouski, 310 allee des Ursulines, Rimouski, Quebec, Canada, G5L 3A1
    Environ Sci Technol 37:4603-9. 2003
    ..However, a most likely explanation is the selective degradation of the technical product in soils and atmosphere in the source region...
  73. ncbi Concentrations of organochlorine pesticides and polychlorinated biphenyls in amphipods (Gammarus lacustris) along an elevation gradient in mountain lakes of western Canada
    Jules M Blais
    Department of Biological Sciences, University of Alberta, Edmonton, Alberta, T6G 2E9, Canada
    Environ Toxicol Chem 22:2605-13. 2003
    ..Because Gammarus is an important trophic link in aquatic foodwebs in these environments, enhanced concentrations of toxicants in prey may increase their biomagnification in top predators of high-altitude lakes...
  74. ncbi Airborne haloacetic acids
    Jonathan W Martin
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario, Canada N1G 2W1
    Environ Sci Technol 37:2889-97. 2003
    ..A simple deposition model indicated that dry deposition of TFA and TCA should not be neglected in temperate mid-latitude environments and that precipitation concentrations can be successfully predicted by the Henry's law constant...
  75. ncbi Field level evaluation and risk assessment of the toxicity of dichloroacetic acid to the aquatic macrophytes Lemna gibba, Myriophyllum spicatum, and Myriophyllum sibiricum
    Mark L Hanson
    Department of Environmental Biology, Centre for Toxicology, University of Guelph, Ont, N1G 2W1, Guelph, Canada
    Ecotoxicol Environ Saf 55:46-63. 2003
    ..01%. The use of effect measure distributions holds promise as a new risk assessment technique for aquatic plants. Currently, environmental levels of DCA do not pose a risk to these plants...
  76. ncbi Assessment and characterization of polychlorinated biphenyls near a hazardous waste incinerator: analysis of vegetation, snow, and sediments
    Jules M Blais
    Department of Biological Sciences, University of Alberta, Edmonton, Alberta T6G 2E9, Canada
    Environ Toxicol Chem 22:126-33. 2003
    ....
  77. ncbi Enantiomer fractions of chiral organochlorine pesticides and polychlorinated biphenyls in standard and certified reference materials
    Charles S Wong
    Department of Chemistry University of Toronto, 80 St George Street, Toronto, Ont, Canada M5S 3H6
    Chemosphere 49:1339-47. 2002
    ..These values should aid in the quality assurance/quality control methodologies for chiral environmental chemistry using standardized reference materials...
  78. ncbi Atmospheric distribution and long-range transport behavior of organochlorine pesticides in North America
    Li Shen
    Department of Chemistry, University of Toronto at Scarborough, Toronto, Ontario, Canada M1C 1A4
    Environ Sci Technol 39:409-20. 2005
    ....
  79. ncbi Organohalogen contaminants in delphinoid cetaceans
    Magali Houde
    University of Guelph, Department of Environmental Biology, Guelph, Ontario NIG 2WI, Canada
    Rev Environ Contam Toxicol 184:1-57. 2005
    ..Nonetheless, PHCs are also found in marine mammal tissues from the Southern Hemisphere and in remote regions such as the Arctic, reflecting the global distribution and contamination of PHCs in the marine ecosystem...
  80. ncbi Regional and species specific bioaccumulation of major and trace elements in Arctic seabirds
    Katrine Borgå
    Norwegian Polar Institute, Polar Environmental Centre, N 9296 Tromsø, Norway
    Environ Toxicol Chem 25:2927-36. 2006
    ....
  81. ncbi Age and seasonal variability of polybrominated diphenyl ethers in free-ranging East Greenland polar bears (Ursus maritimus)
    Rune Dietz
    Department of Arctic Environment, National Environmental Research Institute, Frederiksborgvej 399, P O Box 358, DK 4000 Roskilde, Denmark
    Environ Pollut 146:166-73. 2007
    ..We suggest that future geographical PBDE data comparisons may not need corrections for sex or age, but such data sets should be corrected for seasonal variability, using the presented correctional trigonometric regression...
  82. ncbi Xenoendocrine pollutants may reduce size of sexual organs in East Greenland polar bears (Ursus maritimus)
    Christian Sonne
    Department of Arctic Environment, National Environmental Research Institute, Frederiksborgvej 399, P O Box 358, DK 4000 Roskilde, Denmark
    Environ Sci Technol 40:5668-74. 2006
    ..This may pose a riskto this polar bear subpopulation in the future because of reduced sperm and egg quality/quantity and uterus and penis size/robustness...
  83. ncbi Perfluoroalkyl compounds in relation to life-history and reproductive parameters in bottlenose dolphins (Tursiops truncatus) from Sarasota Bay, Florida, U.S.A
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 25:2405-12. 2006
    ..These chemicals also were detected in urine (mean sigma PFCs, 26.6 +/- 79 ng/g wet wt), indicating that the urinary system is an important pathway of PFC depuration in dolphins...
  84. ncbi Empirical and modeling evidence of the long-range atmospheric transport of decabromodiphenyl ether
    Knut Breivik
    NILU Norwegian Institute for Air Research, P O Box 100, NO 2027 Kjeller, Norway
    Environ Sci Technol 40:4612-8. 2006
    ..Processes that need to be understood better in order to improve predictions of LRT for BDE-209 include particle dry deposition, precipitation scavenging, and photolysis in the sorbed state...
  85. ncbi Temporal trends of perfluoroalkyl contaminants in polar bears (Ursus maritimus) from two locations in the North American Arctic, 1972-2002
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Sci Technol 40:1139-43. 2006
    ..The doubling time for PFOS was similar to the doubling time of production of perfluoroctylsulfonyl-fluoride-based products during the 1990s...
  86. ncbi Levels and trends of brominated flame retardants in the Arctic
    Cynthia A de Wit
    Department of Applied Environmental Science, Stockholm University, SE 10691 Stockholm, Sweden
    Chemosphere 64:209-33. 2006
    ....
  87. ncbi Current-use and legacy pesticide history in the Austfonna Ice Cap, Svalbard, Norway
    Mark H Hermanson
    Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
    Environ Sci Technol 39:8163-9. 2005
    ....
  88. ncbi New organochlorine contaminants and metabolites in plasma and eggs of glaucous gulls (Larus hyperboreus) from the Norwegian Arctic
    Jonathan Verreault
    Norwegian Polar Institute, Tromsø, NO 9296, Norway
    Environ Toxicol Chem 24:2486-99. 2005
    ..As part of a complex profile of contaminant exposure, these chemical classes and metabolites may be contributing factors to enhance physiological stress in breeding glaucous gulls...
  89. ncbi Perfluorinated alkyl substances in plasma, liver, brain, and eggs of glaucous gulls (Larus hyperboreus) from the Norwegian arctic
    Jonathan Verreault
    Norwegian Polar Institute, Tromsø, NO 9296, Norway
    Environ Sci Technol 39:7439-45. 2005
    ....
  90. ncbi Chlorinated hydrocarbon contaminants and metabolites in polar bears (Ursus maritimus) from Alaska, Canada, East Greenland, and Svalbard: 1996-2002
    Jonathan Verreault
    University of Windsor, Great Lakes Institute for Environmental Research, Windsor, Canada, ON N9B 3P4
    Sci Total Environ 351:369-90. 2005
    ..In addition to continued biomonitoring, further research on health and population status is needed to evaluate the impact from chronic exposure of polar bear populations to CHCs and their metabolites...
  91. ncbi Development and application of bioaccumulation models to assess persistent organic pollutant temporal trends in arctic ringed seal (Phoca hispida) populations
    Brendan E Hickie
    Environmental and Resource Studies, Trent University, Peterborough, ON, Canada K9J 7B8
    Sci Total Environ 351:413-26. 2005
    ....
  92. ncbi Perflouroalkyl contaminants in liver tissue from East Greenland polar bears (Ursus maritimus)
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 24:981-6. 2005
    ..No significant correlations were found between concentrations of PFCAs in liver tissue and previously reported polychlorinated biphenyl (PCB) congeners analyzed in fat samples from the same bears...
  93. ncbi Comparison of toxaphene congeners levels in five seal species from eastern Canada: what is the importance of biological factors?
    Bruno Gouteux
    Institut des Sciences de la Mer, Universite du Quebec a Rimouski, Rimouski, Quebec, Canada G5L 3A1
    Environ Sci Technol 39:1448-54. 2005
    ..Results reported in this study indicated that the diet is likely the main factor accounting for interspecies variations in toxaphene contamination in seals from eastern Canada...
  94. ncbi Spatial distribution of polybrominated diphenyl ethers and polybrominated biphenyls in lake trout from the Laurentian Great Lakes
    Jennifer M Luross
    Department of Environmental Biology, University of Guelph, Ont, Canada
    Chemosphere 46:665-72. 2002
    ..25+/-0.13 ng/g ww, 1.7+/-0.89 ng/g lw). In all lake trout samples, 2,2',4,4',5,5'-hexabromobiphenyl (BB-153), a major constituent of the flame-retardant FireMaster BP-6, was the predominant PBB congener...