Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Brian C. Butterworth"'
Autor:
Brian C. Butterworth, Joseph E. Tietge, Emily Burgess, Annelie Lindberg-Livingston, Pamela E. Blackshear, Joseph J. Korte, Sigmund J. Degitz, Jonathan T. Haselman, Patricia A. Kosian, Michael W. Hornung
Publikováno v:
Aquatic Toxicology. 126:128-136
Determining the effects of chemicals on the thyroid system is an important aspect of evaluating chemical safety from an endocrine disrupter perspective. Since there are numerous chemicals to test and limited resources, prioritizing chemicals for subs
Autor:
Joseph E. Tietge, Joseph J. Korte, Gary W. Holcombe, Marilyn J. Wolfe, Jonathan T. Haselman, Michael W. Hornung, Sigmund J. Degitz, Patricia A. Kosian, Brian C. Butterworth
Publikováno v:
Aquatic Toxicology. 98:44-50
Thyroid axis disruption is an important consideration when evaluating risks associated with chemicals. Bioassay methods that include thyroid-related endpoints have been developed in a variety of species, including amphibians, whose metamorphic develo
Autor:
Kembra L. Howdeshell, L. Earl Gray, Gerald A. LeBlanc, Vickie S. Wilson, Christy S. Lambright, Brian C. Butterworth, Elizabeth J. Durhan, Johnathan Furr, Gerald T. Ankley, Elizabeth A. Makynen, Robin M. Sternberg, Chad R. Blystone
Publikováno v:
Toxicological Sciences. 97:512-519
The fungicide prochloraz (PCZ) induces malformations in androgen-dependent tissues in male rats when administered during sex differentiation. The sensitivity of fetal testicular steroidogenesis to PCZ was investigated to test the hypothesis that the
Autor:
Christy S. Lambright, L. Earl Gray, Douglas W. Kuehl, Elizabeth J. Durhan, Brian C. Butterworth, Vickie S. Wilson, Edward F. Orlando, Gerald T. Ankley, Louis J. Guillette
Publikováno v:
Environmental Toxicology and Chemistry. 21:1973-1976
This study evaluates a recent report indicating that androstenedione (4-androsten-3, 17-dione) contributes to the andro-genicity of water downstream of a pulp and paper mill discharge on the Fenholloway River (FL, USA). Extraction and concentration o
Publikováno v:
Environmental Science & Technology. 33:3558-3567
The specific activity (S) and radiopurity (R) of tritium labeled 2,3,7,8-tetrachlorodibenzo-p-dioxin, [3H]TCDD, were measured by gas chromatography/mass spectrometry (GC/MS) while attempting to accurately characterize TCDD doses received by invertebr
Publikováno v:
Chemosphere. 29:523-535
Bottom feeding and game fish, from each of nearly 400 sites throughout the United States were analyzed for 15 PCDD/PCDFs, PCBs, 21 pesticides and herbicides, and 13 other organic chemicals, and mercury. Seven of the PCDD/PCDFs and 15 of the chemicals
Publikováno v:
Chemosphere. 29:537-546
The concentration of mercury has been determined in fish collected for a nation-wide survey of bioaccumulatable chemical contaminants. Samples were prepared using standard digestion procedures and analyzed by flameless atomic absorption. Over 660 sam
Publikováno v:
Chemosphere. 29:495-508
Analytical methods and a quality assurance plan have been developed to determine the concentration of a select group of bioaccumulatable chemicals in fish tissue. The analytes include PCBs and 21 pesticides and industrial chemicals. The methodology h
Autor:
Mary K. Walker, Christine Berini, John J. Libal, Richard E. Peterson, Allan R. Batterman, Philip M. Cook, Lawrence C. Hufnagle, Brian C. Butterworth
Publikováno v:
Canadian Journal of Fisheries and Aquatic Sciences. 51:1410-1419
There were no signs of overt toxicity in sexually mature female lake trout (Salvelinus namaycush) exposed to either a control or a 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-containing diet for 11 wk prior to spawning. At spawning the maternally deri
Publikováno v:
Chemosphere. 22:849-858
Analytical procedures and a quality assurance plan have been developed for the determination of coplanar PCBs in biological tissue at a target level of quantification of 5 pg/g. The methodology is based upon isotope dilution HRGC/HRMS and is analogou