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Robert Letcher
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28
Dietz, Rune
27
Muir, Derek
18
Sonne, Christian
16
Gabrielsen, Geir Wing
15
Kirkegaard, Maja
15
Verreault, Jonathan
14
Born, Erik
13
Norstrom, Ross
9
Drouillard, Ken
8
Riget, Frank
7
Shahmiri, Soheila
7
van den Berg, Martin
7
Fernie, Kim
6
Bergman, Ake
6
Leifsson, Pall
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All Publications
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2009: Sonne Christian; Gustavson Kim; Rigét Frank F; Dietz Rune; Birkved Morten; Letcher Robert J; Bossi Rossana; Vorkamp Katrin; Born Erik W; Petersen Gitte
Reproductive performance in East Greenland polar bears (Ursus maritimus) may be affected by organohalogen contaminants as shown by physiologically-based pharmacokinetic (PBPK) modelling.
Chemosphere 2009;77(11):1558-68.
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2009: Letcher Robert J; Gebbink Wouter A; Sonne Christian; Born Erik W; McKinney Melissa A; Dietz Rune
Bioaccumulation and biotransformation of brominated and chlorinated contaminants and their metabolites in ringed seals (Pusa hispida) and polar bears (Ursus maritimus) from East Greenland.
Environment international 2009;35(8):1118-24.
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2009: Gebbink Wouter A; Hebert Craig E; Letcher Robert J
Perfluorinated carboxylates and sulfonates and precursor compounds in herring gull eggs from colonies spanning the Laurentian Great Lakes of North America.
Environmental science & technology 2009;43(19):7443-9.
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2009: Montie Eric W; Reddy Christopher M; Gebbink Wouter A; Touhey Katie E; Hahn Mark E; Letcher Robert J
Organohalogen contaminants and metabolites in cerebrospinal fluid and cerebellum gray matter in short-beaked common dolphins and Atlantic white-sided dolphins from the western North Atlantic.
Environmental pollution (Barking, Essex : 1987) 2009;157(8-9):2345-58.
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2009: Routti Heli; van Bavel Bert; Letcher Robert J; Arukwe Augustine; Chu Shaogang; Gabrielsen Geir W
Concentrations, patterns and metabolites of organochlorine pesticides in relation to xenobiotic phase I and II enzyme activities in ringed seals (Phoca hispida) from Svalbard and the Baltic Sea.
Environmental pollution (Barking, Essex : 1987) 2009;157(8-9):2428-34.
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2009: Bennett Erin R; Ross Peter S; Huff David; Alaee Mehran; Letcher Robert J
Chlorinated and brominated organic contaminants and metabolites in the plasma and diet of a captive killer whale (Orcinus orca).
Marine pollution bulletin 2009;58(7):1078-83.
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2009: Verreault Jonathan; Letcher Robert J; Sonne Christian; Dietz Rune
In vitro metabolism of polychlorinated biphenyls and cytochrome P450 monooxygenase activities in dietary-exposed Greenland sledge dogs.
Comparative biochemistry and physiology. Toxicology & pharmacology : CBP 2009;150(1):91-100.
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2009: Chu Shaogang; Letcher Robert J
Linear and branched perfluorooctane sulfonate isomers in technical product and environmental samples by in-port derivatization-gas chromatography-mass spectrometry.
Analytical chemistry 2009;81(11):4256-62.
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2009: Routti Heli; Letcher Robert J; Chu Shaogang; Van Bavel Bert; Gabrielsen Geir W
Polybrominated diphenyl ethers and their hydroxylated analogues in ringed seals (Phoca hispida) from Svalbard and the Baltic Sea.
Environmental science & technology 2009;43(10):3494-9.
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2009: Hebert Craig E; Weseloh D V Chip; Gauthier Lewis T; Arts Michael T; Letcher Robert J
Biochemical tracers reveal intra-specific differences in the food webs utilized by individual seabirds.
Oecologia 2009;160(1):15-23.
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2009: Fernie Kim J; Shutt J Laird; Letcher Robert J; Ritchie Ian J; Bird David M
Environmentally relevant concentrations of DE-71 and HBCD alter eggshell thickness and reproductive success of American kestrels.
Environmental science & technology 2009;43(6):2124-30.
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2009: Gauthier Lewis T; Letcher Robert J
Isomers of Dechlorane Plus flame retardant in the eggs of herring gulls (Larus argentatus) from the Laurentian Great Lakes of North America: temporal changes and spatial distribution.
Chemosphere 2009;75(1):115-20.
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2009: Stapleton Heather M; Kelly Shannon M; Pei Ruoting; Letcher Robert J; Gunsch Claudia
Metabolism of polybrominated diphenyl ethers (PBDEs) by human hepatocytes in vitro.
Environmental health perspectives 2009;117(2):197-202.
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2009: Ucán-Marín Francisco; Arukwe Augustine; Mortensen Anne; Gabrielsen Geir W; Fox Glen A; Letcher Robert J
Recombinant transthyretin purification and competitive binding with organohalogen compounds in two gull species (Larus argentatus and Larus hyperboreus).
Toxicological sciences : an official journal of the Society of Toxicology 2009;107(2):440-50.
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2009: Gauthier Lewis T; Potter Dave; Hebert Craig E; Letcher Robert J
Temporal trends and spatial distribution of non-polybrominated diphenyl ether flame retardants in the eggs of colonial populations of Great Lakes herring gulls.
Environmental science & technology 2009;43(2):312-7.
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2009: Verreault Jonathan; Maisonneuve France; Dietz Rune; Sonne Christian; Letcher Robert J
Comparative hepatic activity of xenobiotic-metabolizing enzymes and concentrations of organohalogens and their hydroxylated analogues in captive Greenland sledge dogs (Canis familiaris).
Environmental toxicology and chemistry / SETAC 2009;28(1):162-72.
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2009: Verreault Jonathan; Letcher Robert J; Sonne Christian; Dietz Rune
Dietary, age and trans-generational effects on the fate of organohalogen contaminants in captive sledge dogs in Greenland.
Environment international 2009;35(1):56-62.
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2008: Routti Heli; Letcher Robert J; Arukwe Augustine; Van Bavel Bert; Yoccoz Nigel G; Chu Shaogang; Gabrielsen Geir W
Biotransformation of PCBs in relation to phase I and II xenobiotic-metabolizing enzyme activities in ringed seals (Phoca hispida) from Svalbard and the Baltic Sea.
Environmental science & technology 2008;42(23):8952-8.
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2008: Chu Shaogang; Letcher Robert J
Analysis of fluorotelomer alcohols and perfluorinated sulfonamides in biotic samples by liquid chromatography-atmospheric pressure photoionization mass spectrometry.
Journal of chromatography. A 2008;1215(1-2):92-9.
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2008: Sonne Christian; Rigét Frank F; Beck Jensen Jens-Erik; Hyldstrup Lars; Teilmann Jenni; Dietz Rune; Kirkegaard Maja; Andersen Steen; Letcher Robert J; Jakobsen Jette
Does the nutrition profile of vitamins, fatty acids and microelements counteract the negative impact from organohalogen pollutants on bone mineral density in Greenland sledge dogs (Canis familiaris)?
Environment international 2008;34(6):811-20.
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2008: Rush Scott A; Borgå Katrine; Dietz Rune; Born Erik W; Sonne Christian; Evans Thomas; Muir Derek C G; Letcher Robert J; Norstrom Ross J; Fisk Aaron T
Geographic distribution of selected elements in the livers of polar bears from Greenland, Canada and the United States.
Environmental pollution (Barking, Essex : 1987) 2008;153(3):618-26.
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2008: Verreault Jonathan; Verboven Nanette; Gabrielsen Geir W; Letcher Robert J; Chastel Olivier
Changes in prolactin in a highly organohalogen contaminated Arctic top predator seabird, the glaucous gull.
General and comparative endocrinology 2008;156(3):569-76.
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2008: Verreault Jonathan; Dietz Rune; Sonne Christian; Gebbink Wouter A; Shahmiri Soheila; Letcher Robert J
Comparative fate of organohalogen contaminants in two top carnivores in Greenland: captive sledge dogs and wild polar bears.
Comparative biochemistry and physiology. Toxicology & pharmacology : CBP 2008;147(3):306-15.
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2008: Gebbink Wouter A; Sonne Christian; Dietz Rune; Kirkegaard Maja; Riget Frank F; Born Erik W; Muir Derek C G; Letcher Robert J
Tissue-specific congener composition of organohalogen and metabolite contaminants in East Greenland polar bears (Ursus maritimus).
Environmental pollution (Barking, Essex : 1987) 2008;152(3):621-9.
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2008: Ueno Daisuke; Darling Colin; Alaee Mehran; Pacepavicius Grazina; Teixeira Camilla; Campbell Linda; Letcher Robert James; Bergman Ake; Marsh Göran; Muir Derek
Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) in the abiotic environment: surface water and precipitation from Ontario, Canada.
Environmental science & technology 2008;42(5):1657-64.
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2008: Gauthier Lewis T; Hebert Craig E; Weseloh D V Chip; Letcher Robert J
Dramatic changes in the temporal trends of polybrominated diphenyl ethers (PBDEs) in herring gull eggs from the Laurentian Great Lakes: 1982-2006.
Environmental science & technology 2008;42(5):1524-30.
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2008: Fernie Kim J; Shutt John L; Letcher Robert J; Ritchie James I; Sullivan Katrina; Bird David M
Changes in reproductive courtship behaviors of adult American kestrels (Falco sparverius) exposed to environmentally relevant levels of the polybrominated diphenyl ether mixture, DE-71.
Toxicological sciences : an official journal of the Society of Toxicology 2008;102(1):171-8.
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2008: Sonne Christian; Dietz Rune; Kirkegaard Maja; Letcher Robert J; Shahmiri Soheila; Andersen Steen; Møller Per; Olsen Aage Kristian; Jensen Asger L
Effects of organohalogen pollutants on haematological and urine clinical-chemical parameters in Greenland sledge dogs (Canis familiaris).
Ecotoxicology and environmental safety 2008;69(3):381-90.
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2008: Gebbink Wouter A; Sonne Christian; Dietz Rune; Kirkegaard Maja; Born Erik W; Muir Derek C G; Letcher Robert J
Target tissue selectivity and burdens of diverse classes of brominated and chlorinated contaminants in polar bears (Ursus maritimus) from East Greenland.
Environmental science & technology 2008;42(3):752-9.
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2008: Montie Eric W; Fair Patricia A; Bossart Gregory D; Mitchum Greg B; Houde Magali; Muir Derek C G; Letcher Robert J; McFee Wayne E; Starczak Victoria R; Stegeman John J; Hahn Mark E
Cytochrome P4501A1 expression, polychlorinated biphenyls and hydroxylated metabolites, and adipocyte size of bottlenose dolphins from the Southeast United States.
Aquatic toxicology (Amsterdam, Netherlands) 2008;86(3):397-412.
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2008: Sonne Christian; Leifsson Pall S; Dietz Rune; Kirkegaard Maja; Jensen Asger L; Shahmiri Soheila; Letcher Robert J
Greenland sledge dogs (Canis familiaris) develop liver lesions when exposed to a chronic and dietary low dose of an environmental organohalogen cocktail.
Environmental research 2008;106(1):72-80.
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2007: De Solla S R; Fernie K J; Letcher R J; Chu S G; Drouillard K G; Shahmiri S
Snapping turtles (Chelydra serpentina) as bioindicators in Canadian areas of concern in the Great Lakes Basin. 1. Polybrominated diphenyl ethers, polychlorinated biphenyls, and organochlorine pesticides in eggs.
Environmental science & technology 2007;41(21):7252-9.
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2007: Benedict Rae T; Stapleton Heather M; Letcher Robert J; Mitchelmore Carys L
Debromination of polybrominated diphenyl ether-99 (BDE-99) in carp (Cyprinus carpio) microflora and microsomes.
Chemosphere 2007;69(6):987-93.
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2007: Drouillard Ken G; Chan Stella; O'rourke Sarah; Douglas Haffner G; Letcher Robert J
Elimination of 10 polybrominated diphenyl ether (PBDE) congeners and selected polychlorinated biphenyls (PCBs) from the freshwater mussel, Elliptio complanata.
Chemosphere 2007;69(3):362-70.
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2007: Verreault J; Shahmiri S; Gabrielsen G W; Letcher R J
Organohalogen and metabolically-derived contaminants and associations with whole body constituents in Norwegian Arctic glaucous gulls.
Environment international 2007;33(6):823-30.
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2007: Verreault Jonathan; Gebbink Wouter A; Gauthier Lewis T; Gabrielsen Geir W; Letcher Robert J
Brominated flame retardants in glaucous gulls from the Norwegian Arctic: more than just an issue of polybrominated diphenyl ethers.
Environmental science & technology 2007;41(14):4925-31.
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2007: Gauthier Lewis T; Hebert Craig E; Weseloh D V Chip; Letcher Robert J
Current-use flame retardants in the eggs of herring gulls (Larus argentatus) from the Laurentian Great Lakes.
Environmental science & technology 2007;41(13):4561-7.
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2007: Sonne C; Fonfara S; Dietz R; Kirkegaard M; Letcher R J; Shahmiri S; Andersen S; Møller P
Multiple cytokine and acute-phase protein gene transcription in West Greenland sledge dogs (Canis familiaris) dietary exposed to organic environmental pollutants.
Archives of environmental contamination and toxicology 2007;53(1):110-8.
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2007: Braune Birgit M; Mallory Mark L; Grant Gilchrist H; Letcher Robert J; Drouillard Ken G
Levels and trends of organochlorines and brominated flame retardants in ivory gull eggs from the Canadian Arctic, 1976 to 2004.
The Science of the total environment 2007;378(3):403-17.
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2007: Dietz Rune; Rigét Frank F; Sonne Christian; Letcher Robert J; Backus Sean; Born Erik W; Kirkegaard Maja; Muir Derek C G
Age and seasonal variability of polybrominated diphenyl ethers in free-ranging East Greenland polar bears (Ursus maritimus).
Environmental pollution (Barking, Essex : 1987) 2007;146(1):166-73.
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2007: Drouillard Ken G; Fernie Kimberly J; Letcher Robert J; Shutt Laird J; Whitehead Megan; Gebink Wouter; Bird David M
Bioaccumulation and biotransformation of 61 polychlorinated biphenyl and four polybrominated diphenyl ether congeners in juvenile American kestrels (Falco sparverius).
Environmental toxicology and chemistry / SETAC 2007;26(2):313-24.
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2007: Verreault Jonathan; Bech Claus; Letcher Robert J; Ropstad Erik; Dahl Ellen; Gabrielsen Geir W
Organohalogen contamination in breeding glaucous gulls from the Norwegian Arctic: associations with basal metabolism and circulating thyroid hormones.
Environmental pollution (Barking, Essex : 1987) 2007;145(1):138-45.
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2007: Chu Shaogang; Henny Charles J; Kaiser James L; Drouillard Ken G; Haffner G Douglas; Letcher Robert J
Dacthal and chlorophenoxy herbicides and chlorothalonil fungicide in eggs of osprey (Pandion haliaetus) from the Duwamish-Lake Washington-Puget Sound area of Washington state, USA.
Environmental pollution (Barking, Essex : 1987) 2007;145(1):374-81.
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2006: Verreault Jonathan; Villa Rosa A; Gabrielsen Geir W; Skaare Janneche U; Letcher Robert J
Maternal transfer of organohalogen contaminants and metabolites to eggs of Arctic-breeding glaucous gulls.
Environmental pollution (Barking, Essex : 1987) 2006;144(3):1053-60.
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2006: Verreault Jonathan; Letcher Robert J; Ropstad Erik; Dahl Ellen; Gabrielsen Geir W
Organohalogen contaminants and reproductive hormones in incubating glaucous gulls (Larus hyperboreus) from the Norwegian Arctic.
Environmental toxicology and chemistry / SETAC 2006;25(11):2990-6.
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2006: Verreault Jonathan; Norstrom Ross J; Ramsay Malcolm A; Mulvihill Michael; Letcher Robert J
Composition of chlorinated hydrocarbon contaminants among major adipose tissue depots of polar bears (Ursus maritimus) from the Canadian high Arctic.
The Science of the total environment 2006;370(2-3):580-7.
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2006: McKinney Melissa A; Cesh Lillian S; Elliott John E; Williams Tony D; Garcelon David K; Letcher Robert J
Brominated flame retardants and halogenated phenolic compounds in North American west coast bald eaglet (Haliaeetus leucocephalus) plasma.
Environmental science & technology 2006;40(20):6275-81.
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2006: Song Min; Chu Shaogang; Letcher Robert J; Seth Rajesh
Fate, partitioning, and mass loading of polybrominated diphenyl ethers (PBDEs) during the treatment processing of municipal sewage.
Environmental science & technology 2006;40(20):6241-6.
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2006: Houde Magali; Pacepavicius Grazina; Wells Randall S; Fair Patricia A; Letcher Robert J; Alaee Mehran; Bossart Gregory D; Hohn Aleta A; Sweeney Jay; Solomon Keith R; Muir Derek C G
Polychlorinated biphenyls and hydroxylated polychlorinated biphenyls in plasma of bottlenose dolphins (Tursiops truncatus) from the Western Atlantic and the Gulf of Mexico.
Environmental science & technology 2006;40(19):5860-6.
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2006: Cantón Rocío F; Sanderson J Thomas; Nijmeijer Sandra; Bergman Ake; Letcher Robert J; van den Berg Martin
In vitro effects of brominated flame retardants and metabolites on CYP17 catalytic activity: a novel mechanism of action?
Toxicology and applied pharmacology 2006;216(2):274-81.
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2006: Sonne Christian; Leifsson Pall S; Dietz Rune; Born Erik W; Letcher Robert J; Hyldstrup Lars; Riget Frank F; Kirkegaard Maja; Muir Derek C G
Xenoendocrine pollutants may reduce size of sexual organs in East Greenland polar bears (Ursus maritimus).
Environmental science & technology 2006;40(18):5668-74.
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2006: Hua Wen Yi; Bennett Erin R; Maio Xui-Sheng; Metcalfe Chris D; Letcher Robert J
Seasonality effects on pharmaceuticals and s-triazine herbicides in wastewater effluent and surface water from the Canadian side of the upper Detroit River.
Environmental toxicology and chemistry / SETAC 2006;25(9):2356-65.
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2006: Fernie Kim J; Laird Shutt J; Ritchie Ian J; Letcher Robert J; Drouillard Ken; Bird David M
Changes in the growth, but not the survival, of American kestrels (Falco sparverius) exposed to environmentally relevant polybrominated diphenyl ethers.
Journal of toxicology and environmental health. Part A 2006;69(16):1541-54.
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2006: Hua Wenyi; Bennett Erin R; Letcher Robert J
Ozone treatment and the depletion of detectable pharmaceuticals and atrazine herbicide in drinking water sourced from the upper Detroit River, Ontario, Canada.
Water research 2006;40(12):2259-66.
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2006: Houde Magali; Martin Jonathan W; Letcher Robert J; Solomon Keith R; Muir Derek C G
Biological monitoring of polyfluoroalkyl substances: A review.
Environmental science & technology 2006;40(11):3463-73.
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2006: Sonne Christian; Dietz Rune; Leifsson Pall S; Born Erik W; Kirkegaard Maja; Letcher Robert J; Muir Derek C G; Riget Frank E; Hyldstrup Lars
Are organohalogen contaminants a cofactor in the development of renal lesions in east Greenland polar bears (Ursus maritimus)?
Environmental toxicology and chemistry / SETAC 2006;25(6):1551-7.
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2006: McKinney Melissa A; De Guise Sylvain; Martineau Daniel; Béland Pierre; Lebeuf Michel; Letcher Robert J
Organohalogen contaminants and metabolites in beluga whale (Delphinapterus leucas) liver from two Canadian populations.
Environmental toxicology and chemistry / SETAC 2006;25(5):1246-57.
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2006: McKinney Melissa A; De Guise Sylvain; Martineau Daniel; Béland Pierre; Arukwe Augustine; Letcher Robert J
Biotransformation of polybrominated diphenyl ethers and polychlorinated biphenyls in beluga whale (Delphinapterus leucas) and rat mammalian model using an in vitro hepatic microsomal assay.
Aquatic toxicology (Amsterdam, Netherlands) 2006;77(1):87-97.
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2006: Sonne Christian; Dietz Rune; Larsen Hans J S; Loft Klaus Earl; Kirkegaard Maja; Letcher Robert J; Shahmiri Soheila; Móller Per
Impairment of cellular immunity in west Greenland sledge dogs (Canis familiaris) dietary exposed to polluted minke whale (Balaenoptera acutorostrata) blubber.
Environmental science & technology 2006;40(6):2056-62.
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2006: Muir Derek C G; Backus Sean; Derocher Andrew E; Dietz Rune; Evans Thomas J; Gabrielsen Geir W; Nagy John; Norstrom Ross J; Sonne Christian; Stirling Ian; Taylor Mitch K; Letcher Robert J
Brominated flame retardants in polar bears (Ursus maritimus) from Alaska, the Canadian Arctic, East Greenland, and Svalbard.
Environmental science & technology 2006;40(2):449-55.
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2005: Chu Shaogang; Haffner G Douglas; Letcher Robert J
Simultaneous determination of tetrabromobisphenol A, tetrachlorobisphenol A, bisphenol A and other halogenated analogues in sediment and sludge by high performance liquid chromatography-electrospray tandem mass spectrometry.
Journal of chromatography. A 2005;1097(1-2):25-32.
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2005: Cantón Rocío F; Sanderson J Thomas; Letcher Robert J; Bergman Ake; van den Berg Martin
Inhibition and induction of aromatase (CYP19) activity by brominated flame retardants in H295R human adrenocortical carcinoma cells.
Toxicological sciences : an official journal of the Society of Toxicology 2005;88(2):447-55.
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2005: Fisk Aaron T; de Wit Cynthia A; Wayland Mark; Kuzyk Zou Zou; Burgess Neil; Letcher Robert; Braune Birgit; Norstrom Ross; Blum Susan Polischuk; Sandau Courtney; Lie Elisabeth; Larsen Hans Jørgen S; Skaare Janneche Utne; Muir Derek C G
An assessment of the toxicological significance of anthropogenic contaminants in Canadian arctic wildlife.
The Science of the total environment 2005;351-352():57-93.
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2005: Fernie Kim J; Shutt J Laird; Mayne Greg; Hoffman David; Letcher Robert J; Drouillard Ken G; Ritchie Ian J
Exposure to polybrominated diphenyl ethers (PBDEs): changes in thyroid, vitamin A, glutathione homeostasis, and oxidative stress in American kestrels (Falco sparverius).
Toxicological sciences : an official journal of the Society of Toxicology 2005;88(2):375-83.
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2005: Verreault Jonathan; Muir Derek C G; Norstrom Ross J; Stirling Ian; Fisk Aaron T; Gabrielsen Geir W; Derocher Andrew E; Evans Thomas J; Dietz Rune; Sonne Christian; Sandala Gregory M; Gebbink Wouter; Riget Frank F; Born Erik W; Taylor Mitch K; Nagy John; Letcher Robert J
Chlorinated hydrocarbon contaminants and metabolites in polar bears (Ursus maritimus) from Alaska, Canada, East Greenland, and Svalbard: 1996-2002.
The Science of the total environment 2005;351-352():369-90.
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2005: Braune B M; Outridge P M; Fisk A T; Muir D C G; Helm P A; Hobbs K; Hoekstra P F; Kuzyk Z A; Kwan M; Letcher R J; Lockhart W L; Norstrom R J; Stern G A; Stirling I
Persistent organic pollutants and mercury in marine biota of the Canadian Arctic: an overview of spatial and temporal trends.
The Science of the total environment 2005;351-352():4-56.
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2005: Fernie Kim J; Mayne Greg; Shutt J Laird; Pekarik Cynthia; Grasman Keith A; Letcher Robert J; Drouillard Ken
Evidence of immunomodulation in nestling American kestrels (Falco sparverius) exposed to environmentally relevant PBDEs.
Environmental pollution (Barking, Essex : 1987) 2005;138(3):485-93.
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2005: Letcher Robert J; Sanderson J Thomas; Bokkers Abraham; Giesy John P; van den Berg Martin
Effects of bisphenol A-related diphenylalkanes on vitellogenin production in male carp (Cyprinus carpio) hepatocytes and aromatase (CYP19) activity in human H295R adrenocortical carcinoma cells.
Toxicology and applied pharmacology 2005;209(2):95-104.
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2005: Sonne Christian; Dietz Rune; Leifsson Pall S; Born Erik W; Letcher Robert J; Kirkegaard Maja; Muir Derek C G; Riget Frank F; Hyldstrup Lars
Do organohalogen contaminants contribute to histopathology in liver from East Greenland polar bears (Ursus maritimus)?
Environmental health perspectives 2005;113(11):1569-74.
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2005: Verreault Jonathan; Letcher Robert J; Muir Derek C G; Chu Shaogang; Gebbink Wouter A; Gabrielsen Geir W
New organochlorine contaminants and metabolites in plasma and eggs of glaucous gulls (Larus hyperboreus) from the Norwegian Arctic.
Environmental toxicology and chemistry / SETAC 2005;24(10):2486-99.
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2005: Verreault Jonathan; Houde Magali; Gabrielsen Geir W; Berger Urs; Haukås Marianne; Letcher Robert J; Muir Derek C G
Perfluorinated alkyl substances in plasma, liver, brain, and eggs of glaucous gulls (Larus hyperboreus) from the Norwegian arctic.
Environmental science & technology 2005;39(19):7439-45.
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2005: Verreault Jonathan; Gabrielsen Geir W; Chu Shaogang; Muir Derek C G; Andersen Magnus; Hamaed Ahmad; Letcher Robert J
Flame retardants and methoxylated and hydroxylated polybrominated diphenyl ethers in two Norwegian Arctic top predators: glaucous gulls and polar bears.
Environmental science & technology 2005;39(16):6021-8.
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2005: Valters Karlis; Li Hongxia; Alaee Mehran; D'Sa Ivy; Marsh Göran; Bergman Ake; Letcher Robert J
Polybrominated diphenyl ethers and hydroxylated and methoxylated brominated and chlorinated analogues in the plasma of fish from the Detroit River.
Environmental science & technology 2005;39(15):5612-9.
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2005: Smithwick Marla; Mabury Scott A; Solomon Keith R; Sonne Christian; Martin Jonathan W; Born Erik W; Dietz Rune; Derocher Andrew E; Letcher Robert J; Evans Thomas J; Gabrielsen Geir W; Nagy John; Stirling Ian; Taylor Mitch K; Muir Derek C G
Circumpolar study of perfluoroalkyl contaminants in polar bears (Ursus maritimus).
Environmental science & technology 2005;39(15):5517-23.
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2005: Hua Wenyi; Bennett Erin R; Letcher Robert J
Triclosan in waste and surface waters from the upper Detroit River by liquid chromatography-electrospray-tandem quadrupole mass spectrometry.
Environment international 2005;31(5):621-30.
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2005: Letcher R J; Li H X; Chu S G
Determination of hydroxylated polychlorinated biphenyls (HO-PCBs) in blood plasma by high-performance liquid chromatography-electrospray ionization-tandem quadrupole mass spectrometry.
Journal of analytical toxicology 2005;29(4):209-16.
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2005: Smithwick Marla; Muir Derek C G; Mabury Scott A; Solomon Keith R; Martin Jonathan W; Sonne Christian; Born Erik W; Letcher Robert J; Dietz Rune
Perflouroalkyl contaminants in liver tissue from East Greenland polar bears (Ursus maritimus).
Environmental toxicology and chemistry / SETAC 2005;24(4):981-6.
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2005: Kirkegaard M; Sonne C; Leifsson P S; Dietz R; Born E W; Muir D C G; Letcher R J
Histology of selected immunological organs in polar bear (Ursus maritimus) from East Greenland in relation to concentrations of organohalogen contaminants.
The Science of the total environment 2005;341(1-3):119-32.
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2005: Sonne C; Riget F F; Dietz R; Kirkegaard M; Born E W; Letcher R; Muir D C G
Trends in fluctuating asymmetry in East Greenland polar bears (Ursus maritimus) from 1892 to 2002 in relation to organohalogen pollution.
The Science of the total environment 2005;341(1-3):81-96.
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2005: Li Hongxia; Tyndale Sélène T; Heath Daniel D; Letcher Robert J
Determination of carotenoids and all-trans-retinol in fish eggs by liquid chromatography-electrospray ionization-tandem mass spectrometry.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences 2005;816(1-2):49-56.
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2005: Sonne C; Leifsson P S; Dietz R; Born E W; Letcher R J; Kirkegaard M; Muir D C G; Andersen L W; Riget F F; Hyldstrup L
Enlarged clitoris in wild polar bears (Ursus maritimus) can be misdiagnosed as pseudohermaphroditism.
The Science of the total environment 2005;337(1-3):45-58.
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2004: Sonne Christian; Dietz Rune; Born Erik W; Riget Frank F; Kirkegaard Maja; Hyldstrup Lars; Letcher Robert J; Muir Derek C G
Is bone mineral composition disrupted by organochlorines in east Greenland polar bears (Ursus maritimus)?
Environmental health perspectives 2004;112(17):1711-6.
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2004: Sandala G M; Sonne-Hansen C; Dietz R; Muir D C G; Valters K; Bennett E R; Born E W; Letcher R J
Hydroxylated and methyl sulfone PCB metabolites in adipose and whole blood of polar bear (Ursus maritimus) from East Greenland.
The Science of the total environment 2004;331(1-3):125-41.
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2004: Dietz R; Riget F F; Sonne C; Letcher R; Born E W; Muir D C G
Seasonal and temporal trends in polychlorinated biphenyls and organochlorine pesticides in East Greenland polar bears (Ursus maritimus), 1990-2001.
The Science of the total environment 2004;331(1-3):107-24.
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2004: Stapleton Heather M; Letcher Robert J; Li Juliana; Baker Joel E
Dietary accumulation and metabolism of polybrominated diphenyl ethers by juvenile carp (Cyprinus carpio).
Environmental toxicology and chemistry / SETAC 2004;23(8):1939-46.
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2004: McKinney Melissa A; Arukwe Augustine; De Guise Sylvain; Martineau Daniel; Béland Pierre; Dallaire André; Lair Stéphane; Lebeuf Michel; Letcher Robert J
Characterization and profiling of hepatic cytochromes P450 and phase II xenobiotic-metabolizing enzymes in beluga whales (Delphinapterus leucas) from the St. Lawrence River Estuary and the Canadian Arctic.
Aquatic toxicology (Amsterdam, Netherlands) 2004;69(1):35-49.
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2004: Stapleton Heather M; Letcher Robert J; Baker Joel E
Debromination of polybrominated diphenyl ether congeners BDE 99 and BDE 183 in the intestinal tract of the common carp (Cyprinus carpio).
Environmental science & technology 2004;38(4):1054-61.
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2004: Stapleton Heather M; Alaee Mehran; Letcher Robert J; Baker Joel E
Debromination of the flame retardant decabromodiphenyl ether by juvenile carp (Cyprinus carpio) following dietary exposure.
Environmental science & technology 2004;38(1):112-9.
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2003: Hoekstra Paul F; Letcher Robert J; O'Hara Todd M; Backus Sean M; Solomon Keith R; Muir Derek C G
Hydroxylated and methylsulfone-containing metabolites of polychlorinated biphenyls in the plasma and blubber of bowhead whales (Balaena mysticetus).
Environmental toxicology and chemistry / SETAC 2003;22(11):2650-8.
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2003: Li Hongxia; Drouillard Ken G; Bennett Erin; Haffner G Douglas; Letcher Robert J
Plasma-associated halogenated phenolic contaminants in benthic and pelagic fish species from the Detroit River.
Environmental science & technology 2003;37(5):832-9.
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2003: Li Hongxia; Boon Jan P; Lewis Wilma E; van den Berg Martin; Nyman Madeleine; Letcher Robert J
Hepatic microsomal cytochrome P450 enzyme activity in relation to in vitro metabolism/inhibition of polychlorinated biphenyls and testosterone in Baltic grey seal (Halichoerus grypus).
Environmental toxicology and chemistry / SETAC 2003;22(3):636-44.
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2003: Hobbs Karen E; Muir Derek C G; Michaud Robert; Béland Pierre; Letcher Robert J; Norstrom Ross J
PCBs and organochlorine pesticides in blubber biopsies from free-ranging St. Lawrence River Estuary beluga whales (Delphinapterus leucas), 1994-1998.
Environmental pollution (Barking, Essex : 1987) 2003;122(2):291-302.
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2002: Letcher Robert J; Lemmen Josephine G; van der Burg Bart; Brouwer Abraham; Bergman Ake; Giesy John P; van den Berg Martin
In vitro antiestrogenic effects of aryl methyl sulfone metabolites of polychlorinated biphenyls and 2,2-bis(4-chlorophenyl)-1,1-dichloroethene on 17beta-estradiol-induced gene expression in several bioassay systems.
Toxicological sciences : an official journal of the Society of Toxicology 2002;69(2):362-72.
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2002: Li Hongxia; Letcher Robert J
A high-performance-liquid-chromatography-based method for the determination of hydroxylated testosterone metabolites formed in vitro in liver microsomes from gray seal (Halichoerus grypus).
Journal of chromatographic science 2002;40(7):397-402.
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2002: Rankouhi T Rouhani; van Holsteijn I; Letcher R; Giesy J P; van Den Berg M
Effects of primary exposure to environmental and natural estrogens on vitellogenin production in carp (Cyprinus carpio) hepatocytes.
Toxicological sciences : an official journal of the Society of Toxicology 2002;67(1):75-80.
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2001: Stapleton H M; Letcher R J; Baker J E
Metabolism of PCBs by the deepwater sculpin (Myoxocephalus thompsoni).
Environmental science & technology 2001;35(24):4747-52.
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2001: De Guise S; Shaw S D; Barclay J S; Brock J; Brouwer A; Dewailly E; Fair P A; Fournier M; Grandjean P; Guillette L J; Hahn M E; Koopman-Esseboom C; Letcher R J; Matz A; Norstrom R J; Perkins C R; Schwacke L; Skaare J U; Sowles J; St Aubin D J; Stegeman J; Whaley J E
Consensus statement: Atlantic Coast Contaminants Workshop 2000.
Environmental health perspectives 2001;109(12):1301-2.
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2001: Sanderson J T; Letcher R J; Heneweer M; Giesy J P; van den Berg M
Effects of chloro-s-triazine herbicides and metabolites on aromatase activity in various human cell lines and on vitellogenin production in male carp hepatocytes.
Environmental health perspectives 2001;109(10):1027-31.
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2001: Meerts I A; Letcher R J; Hoving S; Marsh G; Bergman A; Lemmen J G; van der Burg B; Brouwer A
In vitro estrogenicity of polybrominated diphenyl ethers, hydroxylated PDBEs, and polybrominated bisphenol A compounds.
Environmental health perspectives 2001;109(4):399-407.
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2001: van Hezik C M; Letcher R J; de Geus H J; Wester P G; Goksøyr A; Lewis W E; Boon J P
Indications for the involvement of a CYP3A-like iso-enzyme in the metabolism of chlorobornane (Toxaphene) congeners in seals from inhibition studies with liver microsomes.
Aquatic toxicology (Amsterdam, Netherlands) 2001;51(3):319-33.
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1999: Letcher R J; van Holsteijn I; Drenth H J; Norstrom R J; Bergman A; Safe S; Pieters R; van den Berg M
Cytotoxicity and aromatase (CYP19) activity modulation by organochlorines in human placental JEG-3 and JAR choriocarcinoma cells.
Toxicology and applied pharmacology 1999;160(1):10-20.
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1998: Wiberg K; Letcher R; Sandau C; Duffe J; Norstrom R; Haglund P; Bidleman T
Enantioselective gas chromatography/mass spectrometry of methylsulfonyl PCBs with application to arctic marine mammals.
Analytical chemistry 1998;70(18):3845-52.
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1997: Bandiera S M; Torok S M; Letcher R J; Norstrom R J
Immunoquantitation of cytochromes P450 1A and P450 2B and comparison with chlorinated hydrocarbon levels in archived polar bear liver samples.
Chemosphere 1997;34(5-7):1469-79.
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1996: Letcher R J; Norstrom R J; Lin S; Ramsay M A; Bandiera S M
Immunoquantitation and microsomal monooxygenase activities of hepatic cytochromes P4501A and P4502B and chlorinated hydrocarbon contaminant levels in polar bear (Ursus maritimus).
Toxicology and applied pharmacology 1996;137(2):127-40.
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1995: Letcher R J; Norstrom R J; Bergman A
An integrated analytical method for determination of polychlorinated aryl methyl sulfone metabolites and polychlorinated hydrocarbon contaminants in biological matrices.
Analytical chemistry 1995;67(22):4155-63.
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1995: Polischuk S C; Letcher R J; Norstrom R J; Ramsay M A
Preliminary results of fasting on the kinetics of organochlorines in polar bears (Ursus maritimus).
The Science of the total environment 1995;160-161():465-72.
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1995: Letcher R J; Norstrom R J; Bergman A
Geographical distribution and identification of methyl sulphone PCB and DDE metabolites in pooled polar bear (Ursus maritimus) adipose tissue from western hemisphere arctic and subarctic regions.
The Science of the total environment 1995;160-161():409-20.
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