Research Topics
| Gregg T TomySummaryAffiliation: Fisheries and Oceans Canada Country: Canada Publications
| Collaborators
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Detail Information
Publications
Isomers of dechlorane plus in Lake Winnipeg and Lake Ontario food websGregg T Tomy
Department of Fisheries and Oceans, Winnipeg, Manitoba, R3T 2N6 Canada
Environ Sci Technol 41:2249-54. 2007..were also differences in the biomagnification potentials, as measured bythe trophic magnification factor (TMF), between the isomers in the Lake Winnipeg food web; no statistically significant TMFs for either isomer were found for the..- Biotransformation enzymes and thyroid axis disruption in juvenile rainbow trout (Oncorhynchus mykiss) exposed to hexabromocyclododecane diastereoisomersVince P Palace
Department of Fisheries and Ocean, Freshwater Institute, Winnipeg, Manitoba, R3T 2N6, Canada
Environ Sci Technol 42:1967-72. 2008..Results from these experiments indicate that all isomers have the potential to disrupt thyroid homeostasis... - Temporal trends of perfluoroalkyl compounds with isomer analysis in lake trout from Lake Ontario (1979-2004)Vasile I Furdui
Department of Chemistry, University of Toronto, 80 St George Street, Toronto, ON M5S 3H6
Environ Sci Technol 42:4739-44. 2008..However, the most recent samples, comprised almost exclusively of linear isomers, indicate that current PFCA sources to Lake Ontario result from the telomerization process of linear telogens... - Synthesis, isolation and purification of C10-C13 polychloro-n-alkanes for use as standards in environmental analysisG T Tomy
Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, MB, Canada
Chemosphere 40:679-83. 2000..Quantification of a known amount of the newly synthesized sPCAs mixture, using an industrial formulation as an external standard, resulted in an overestimation (approximately 28%) in its true value... - Refinements to the diastereoisomer-specific method for the analysis of hexabromocyclododecaneGregg T Tomy
Department of Fisheries and Oceans, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, R3T 2N6 MB Canada
Rapid Commun Mass Spectrom 19:2819-26. 2005.... - Fluorinated organic compounds in an eastern Arctic marine food webGregg T Tomy
Department of Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, Manitoba R3T2N6, Canada
Environ Sci Technol 38:6475-81. 2004..The presence of perfluorinated compounds in seabirds and mammals provides evidence that trophic transfer is an important exposure route of these chemicals to Arctic biota... - Dietary exposure of juvenile rainbow trout (Oncorhynchus mykiss) to 1,2-bis(2,4,6-tribromophenoxy)ethane: bioaccumulation parameters, biochemical effects, and metabolismGregg T Tomy
Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba R3T 2N6, Canada
Environ Sci Technol 41:4913-8. 2007..Similar concentrations of circulating thyroid hormones, liver deiodinase enzyme activity, and thyroid glandular histology suggest that BTBPE is not a potent thyroid axis disruptor... - Biomagnification of alpha- and gamma-hexabromocyclododecane isomers in a Lake Ontario food webGregg T Tomy
Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba R3T 2N6, Canada
Environ Sci Technol 38:2298-303. 2004..4 to 10.8 for the alpha-isomer and from 0.2 to 10 for gamma-isomers... - Bioaccumulation, biotransformation, and biochemical effects of brominated diphenyl ethers in juvenile lake trout (Salvelinus namaycush)Gregg T Tomy
Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba, R3T 2N6 Canada
Environ Sci Technol 38:1496-504. 2004.... - Biotransformation of N-ethyl perfluorooctanesulfonamide by rainbow trout (Onchorhynchus mykiss) liver microsomesGregg T Tomy
Department of Fisheries and Oceans, Winnipeg, Manitoba R3T 2N6, Canada
Environ Sci Technol 38:758-62. 2004.... - Identilication of the novel cycloaliphatic brominated flame retardant 1,2-dibromo-4-(1,2-dibromoethyl)cyclohexane in Canadian Arctic beluga (Delphinapterus leucas)Gregg T Tomy
Department of Fisheries and Oceans, Arctic Aquatic Research Division, Winnipeg, MB, R3T 2N6 Canada
Environ Sci Technol 42:543-9. 2008..Observed concentrations of the beta-isomer as measured by HRMS ranged from 1.1 to 9.3 ng/g (lipid weight)... - Examination of isomer specific bioaccumulation parameters and potential in vivo hepatic metabolites of syn- and anti-Dechlorane Plus isomers in juvenile rainbow trout (Oncorhynchus mykiss)Gregg T Tomy
Department of Fisheries and Oceans, Arctic Aquatic Research Division, Winnipeg, MB R3T 2N6, Canada
Environ Sci Technol 42:5562-7. 2008..This suggests that if metabolites of DP are detected in fish from aquatic food webs their presence is likely not from in vivo biotransformation of the parent compound... - Enantioselective bioaccumulation of hexabromocyclododecane and congener-specific accumulation of brominated diphenyl ethers in an eastern Canadian Arctic marine food webGregg T Tomy
Department of Fisheries and Oceans, Arctic Aquatic Research Division, Winnipeg, MB R3T 2N6, Canada
Environ Sci Technol 42:3634-9. 2008.... - Trophodynamics of some PFCs and BFRs in a western Canadian Arctic marine food webGregg T Tomy
Fisheries and Oceans, Canada, Arctic Aquatic Research Division, Winnipeg, Manitoba R3T 2N6, Canada
Environ Sci Technol 43:4076-81. 2009..04) and in beluga (1.4) and suggests that, in part, there are differences in the efficacy of biotransforming PFOSA by whale and seal top predators that both preferentially feed on Arctic cod... - Dietary accumulation of hexabromocyclododecane diastereoisomers in juvenile rainbow trout (Oncorhynchus mykiss) I: bioaccumulation parameters and evidence of bioisomerizationKerri Law
Department of Fisheries and Ocean, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba R3T 2N6, Canada
Environ Toxicol Chem 25:1757-61. 2006..To our knowledge, this is the first report of bioisomerization of a halogenated organic pollutant in biota... 
Toxicokinetics of tetrabromoethylcyclohexane (TBECH) in juvenile brown trout (Salmo trutta) and effects on plasma sex hormonesBonnie Gemmill
Fisheries and Oceans Canada, Arctic Aquatic Research Division, Winnipeg, Manitoba R3T 2N6, Canada
Aquat Toxicol 101:309-17. 2011..While there were occasional differences among treatment groups in circulating plasma E2, T and 11-KT levels there was no clear, temporal trend or dose-response...- Direct measurement of octanol-water partition coefficients of some environmentally relevant brominated diphenyl ether congenersEric Braekevelt
Department of Fisheries and Oceans, Freshwater Institute, 501 University Cresent, Winnipeg, Manitoba, Canada R3T 2N6
Chemosphere 51:563-7. 2003..The tri- and tetrabrominated congeners are in the range of optimum bioaccumulation potential... - Fate of PBDEs in juvenile lake trout estimated using a dynamic multichemical fish modelSatyendra P Bhavsar
Department of Ecology and Evolutionary Biology, University of Toronto, Toronto, ON, Canada M5S 3G5 Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, MB, Canada, R3T 2N6
Environ Sci Technol 42:3724-31. 2008.... - Large and growing environmental reservoirs of Deca-BDE present an emerging health risk for fish and marine mammalsPeter S Ross
Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC, Canada
Mar Pollut Bull 58:7-10. 2009.... - Bioaccumulation and trophic magnification of short- and medium-chain chlorinated paraffins in food webs from Lake Ontario and Lake MichiganMagali 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... - Comparison of an individual congener standard and a technical mixture for the quantification of toxaphene in environmental matrices by HRGC/ECNI-HRMSE Braekevelt
Freshwater Institute, Department of Fisheries and Oceans, Winnipeg, Manitoba, Canada
Environ Sci Technol 35:3513-8. 2001.... - Modern and historical fluxes of halogenated organic contaminants to a lake in the Canadian arctic, as determined from annually laminated sediment coresG A Stern
Department of Fisheries and Oceans, Freshwater Institute, 501 University Crescent, Winnipeg, Manitoba, Canada R3T 2N6
Sci Total Environ 342:223-43. 2005..Improvements in combustion technology may be responsible for the reducing the proportion of TCDF relative to OCDD in the most recent slice... - Examination of the behavior and liver and thyroid histology of juvenile rainbow trout (Oncorhynchus mykiss) exposed to high dietary concentrations of C(10)-, C(11)-, C(12)- and C(14)-polychlorinated n-alkanesH M Cooley
Freshwater Institute, Department of Fisheries and Oceans, 501 University Crescent, Winnipeg, MB, Canada R3N 2N6
Aquat Toxicol 54:81-99. 2001..However, the exposure concentrations were likely much greater in these experiments compared with the environment and require further study... - Distribution of hexabromocyclododecane in Detroit River suspended sedimentsChris H Marvin
National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, ON, Canada
Chemosphere 64:268-75. 2006..6-3.7 ng/g) were associated with areas of contemporary industrial activity, and were much lower than maximum concentrations of PCBs (2.2 microg/g) found in areas of the Detroit River associated with historical industrial activity... - Synthesis of the two minor isomers, delta- and epsilon-1,2,5,6,9,10-hexabromocyclododecane, present in commercial hexabromocyclododecaneGilles Arsenault
Wellington Laboratories Inc, Research Division, 345 Southgate Drive, Guelph, Ont, Canada N1G 3M5
Chemosphere 68:887-92. 2007..Indeed, when a sample of ttt-CDT was brominated it gave two products, the NMR spectra and LC/MS and GC/MS behaviour of which confirmed that they are identical to the minor components, delta- and epsilon-HBCD, present in commercial HBCD... - Occurrence and biomagnification of polychlorinated naphthalenes and non- and mono-ortho PCBs in Lake Ontario sediment and biotaPaul A Helm
Environmental Monitoring and Reporting Branch, Ontario Ministry of the Environment, 125 Resources Road, Toronto, Ontario M9P 3V6, Canada
Environ Sci Technol 42:1024-31. 2008..PCNs contribute significantly to the burden of dioxin-like compounds in Lake Ontario biota, contributing between 12 and 22% of total PCN + PCB TEQ in lake trout and up to 69% in benthic organisms... - Dechlorane plus levels in sediment of the lower Great LakesEd Sverko
Department of Chemistry, McMaster University, Hamilton, Ontario, L8S 4M1, Canada
Environ Sci Technol 42:361-6. 2008..To our knowledge, this is the first report of DP degradates in the environment... - Anaerobic transformation of compounds of technical toxaphene. 2. Fate of compounds lacking geminal chlorine atomsSteffen Ruppe
Department of Food Chemistry, Friedrich-Schiller-University Jena, Dornburger Strasse 25, D-07743 Jena, Germany
Environ Toxicol Chem 23:591-8. 2004.... - Factors influencing enantiomeric fractions of hexabromocyclododecane measured using liquid chromatography/tandem mass spectrometryChris H Marvin
Environment Canada, 867 Lakeshore Road, Burlington, Ontario L7R 4A6 Canada
Rapid Commun Mass Spectrom 21:1925-30. 2007.... - PAHs, PCBs, PCNs, organochlorine pesticides, synthetic musks, and polychlorinated n-alkanes in U.K. sewage sludge: survey results and implicationsJoanna L Stevens
Environmental Science Department, Institute of Environmental and Natural Sciences, Lancaster University, Lancaster, LA1 4YQ, UK
Environ Sci Technol 37:462-7. 2003..These very high concentrations are indicative of chemicals with numerous and ongoing diffuse sources... - Vapor pressures, aqueous solubilities, and Henry's law constants of some brominated flame retardantsSheryl A Tittlemier
Centre for Analytical and Environmental Chemistry, Carleton University, Ottawa, Ontario, Canada
Environ Toxicol Chem 21:1804-10. 2002..Degradative debromination reactions that yield these congeners would mobilize them environmentally, and ultimately affect the fate and distribution of BFRs...