Gregg T Tomy

Summary

Affiliation: Fisheries and Oceans Canada
Country: Canada

Publications

  1. ncbi Isomers of dechlorane plus in Lake Winnipeg and Lake Ontario food webs
    Gregg T Tomy
    Department of Fisheries and Oceans, Winnipeg, Manitoba, R3T 2N6 Canada
    Environ Sci Technol 41:2249-54. 2007
  2. ncbi Biotransformation enzymes and thyroid axis disruption in juvenile rainbow trout (Oncorhynchus mykiss) exposed to hexabromocyclododecane diastereoisomers
    Vince P Palace
    Department of Fisheries and Ocean, Freshwater Institute, Winnipeg, Manitoba, R3T 2N6, Canada
    Environ Sci Technol 42:1967-72. 2008
  3. ncbi 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
  4. ncbi Synthesis, isolation and purification of C10-C13 polychloro-n-alkanes for use as standards in environmental analysis
    G T Tomy
    Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, MB, Canada
    Chemosphere 40:679-83. 2000
  5. ncbi 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
  6. ncbi Dietary exposure of juvenile rainbow trout (Oncorhynchus mykiss) to 1,2-bis(2,4,6-tribromophenoxy)ethane: bioaccumulation parameters, biochemical effects, and metabolism
    Gregg T Tomy
    Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba R3T 2N6, Canada
    Environ Sci Technol 41:4913-8. 2007
  7. ncbi Refinements to the diastereoisomer-specific method for the analysis of hexabromocyclododecane
    Gregg 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
  8. ncbi Fluorinated organic compounds in an eastern Arctic marine food web
    Gregg T Tomy
    Department of Fisheries and Oceans Canada, 501 University Crescent, Winnipeg, Manitoba R3T2N6, Canada
    Environ Sci Technol 38:6475-81. 2004
  9. ncbi Biomagnification of alpha- and gamma-hexabromocyclododecane isomers in a Lake Ontario food web
    Gregg T Tomy
    Department of Fisheries and Oceans, Freshwater Institute, Winnipeg, Manitoba R3T 2N6, Canada
    Environ Sci Technol 38:2298-303. 2004
  10. ncbi 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

Collaborators

Detail Information

Publications33

  1. ncbi Isomers of dechlorane plus in Lake Winnipeg and Lake Ontario food webs
    Gregg 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..
  2. ncbi Biotransformation enzymes and thyroid axis disruption in juvenile rainbow trout (Oncorhynchus mykiss) exposed to hexabromocyclododecane diastereoisomers
    Vince 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...
  3. ncbi 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...
  4. ncbi Synthesis, isolation and purification of C10-C13 polychloro-n-alkanes for use as standards in environmental analysis
    G 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...
  5. ncbi 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)...
  6. ncbi Dietary exposure of juvenile rainbow trout (Oncorhynchus mykiss) to 1,2-bis(2,4,6-tribromophenoxy)ethane: bioaccumulation parameters, biochemical effects, and metabolism
    Gregg 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...
  7. ncbi Refinements to the diastereoisomer-specific method for the analysis of hexabromocyclododecane
    Gregg 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
    ....
  8. ncbi Fluorinated organic compounds in an eastern Arctic marine food web
    Gregg 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...
  9. ncbi Biomagnification of alpha- and gamma-hexabromocyclododecane isomers in a Lake Ontario food web
    Gregg 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...
  10. ncbi 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
    ....
  11. ncbi Biotransformation of N-ethyl perfluorooctanesulfonamide by rainbow trout (Onchorhynchus mykiss) liver microsomes
    Gregg T Tomy
    Department of Fisheries and Oceans, Winnipeg, Manitoba R3T 2N6, Canada
    Environ Sci Technol 38:758-62. 2004
    ....
  12. ncbi 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...
  13. doi Dechlorane plus monoadducts in a Lake Ontario (Canada) food web and biotransformation by lake trout (Salvelinus namaycush) liver microsomes
    Gregg T Tomy
    Fisheries and Oceans Canada, Arctic Aquatic Research Division, Winnipeg, Manitoba, Canada
    Environ Toxicol Chem 32:1376-81. 2013
    ..The present study also shows that the concentrations of these isomers, which the authors speculate might be unintended impurities or byproducts in some technical DP formulations, exceed that of the intended product in biota...
  14. ncbi Trophodynamics of some PFCs and BFRs in a western Canadian Arctic marine food web
    Gregg 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...
  15. ncbi Enantioselective bioaccumulation of hexabromocyclododecane and congener-specific accumulation of brominated diphenyl ethers in an eastern Canadian Arctic marine food web
    Gregg T Tomy
    Department of Fisheries and Oceans, Arctic Aquatic Research Division, Winnipeg, MB R3T 2N6, Canada
    Environ Sci Technol 42:3634-9. 2008
    ....
  16. ncbi Dietary accumulation of hexabromocyclododecane diastereoisomers in juvenile rainbow trout (Oncorhynchus mykiss) I: bioaccumulation parameters and evidence of bioisomerization
    Kerri 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...
  17. doi Toxicokinetics of tetrabromoethylcyclohexane (TBECH) in juvenile brown trout (Salmo trutta) and effects on plasma sex hormones
    Bonnie 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...
  18. ncbi Temporal and spatial variation in polychlorinated biphenyl chiral signatures of the Greenland shark (Somniosus microcephalus) and its arctic marine food web
    Zhe Lu
    Department of Chemistry, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
    Environ Pollut 186:216-25. 2014
    ....
  19. ncbi Direct measurement of octanol-water partition coefficients of some environmentally relevant brominated diphenyl ether congeners
    Eric 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...
  20. ncbi Fate of PBDEs in juvenile lake trout estimated using a dynamic multichemical fish model
    Satyendra 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
    ....
  21. doi Large and growing environmental reservoirs of Deca-BDE present an emerging health risk for fish and marine mammals
    Peter S Ross
    Institute of Ocean Sciences, Fisheries and Oceans Canada, Sidney, BC, Canada
    Mar Pollut Bull 58:7-10. 2009
    ....
  22. 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...
  23. ncbi Comparison of an individual congener standard and a technical mixture for the quantification of toxaphene in environmental matrices by HRGC/ECNI-HRMS
    E Braekevelt
    Freshwater Institute, Department of Fisheries and Oceans, Winnipeg, Manitoba, Canada
    Environ Sci Technol 35:3513-8. 2001
    ....
  24. ncbi Modern and historical fluxes of halogenated organic contaminants to a lake in the Canadian arctic, as determined from annually laminated sediment cores
    G 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...
  25. ncbi 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-alkanes
    H 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...
  26. ncbi Distribution of hexabromocyclododecane in Detroit River suspended sediments
    Chris 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...
  27. ncbi Synthesis of the two minor isomers, delta- and epsilon-1,2,5,6,9,10-hexabromocyclododecane, present in commercial hexabromocyclododecane
    Gilles 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...
  28. ncbi Occurrence and biomagnification of polychlorinated naphthalenes and non- and mono-ortho PCBs in Lake Ontario sediment and biota
    Paul 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...
  29. ncbi Dechlorane plus levels in sediment of the lower Great Lakes
    Ed 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...
  30. ncbi Anaerobic transformation of compounds of technical toxaphene. 2. Fate of compounds lacking geminal chlorine atoms
    Steffen Ruppe
    Department of Food Chemistry, Friedrich Schiller University Jena, Dornburger Strasse 25, D 07743 Jena, Germany
    Environ Toxicol Chem 23:591-8. 2004
    ....
  31. ncbi Factors influencing enantiomeric fractions of hexabromocyclododecane measured using liquid chromatography/tandem mass spectrometry
    Chris H Marvin
    Environment Canada, 867 Lakeshore Road, Burlington, Ontario L7R 4A6 Canada
    Rapid Commun Mass Spectrom 21:1925-30. 2007
    ....
  32. ncbi Vapor pressures, aqueous solubilities, and Henry's law constants of some brominated flame retardants
    Sheryl 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...
  33. ncbi PAHs, PCBs, PCNs, organochlorine pesticides, synthetic musks, and polychlorinated n-alkanes in U.K. sewage sludge: survey results and implications
    Joanna 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...