Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Michael K. Hoffman"'
Publikováno v:
Environmental Health Perspectives
The purpose of this study was to estimate mean concentrations of total arsenic in chicken liver tissue and then estimate total and inorganic arsenic ingested by humans through chicken consumption. We used national monitoring data from the Food Safety
Publikováno v:
Analytica Chimica Acta. 483:137-145
A sensitive method was developed and validated for routine screening and confirmation of ractopamine residues in porcine and bovine muscle tissues. Muscle tissues were extracted with methanol and hydrolyzed with β-glucuronidase, followed by liquid e
Publikováno v:
Analytica Chimica Acta. 483:125-135
A very sensitive method was developed for detection and confirmation of chloramphenicol (CAP) in equine, porcine and bovine muscle and urine. The method included ethyl acetate extraction of CAP followed by a two-step C18 solid-phase clean up; recover
Autor:
Eshaq Isaac Shishani, Cindy Deyrup, Michael K. Hoffman, Aron M. Yoffe, Gene Aznar, Robert L. Epstein
Publikováno v:
Analytica Chimica Acta. 473:49-52
The Additional Testing Program (ATP) was designed by the United States Department of Agriculture (USDA) to ensure a strict control on chemical residue testing in meat destined for the European Union (EU). This paper summarizes relevant events since 1
Publikováno v:
Veterinary Clinics of North America: Food Animal Practice. 15:89-107
Pesticide use is vital to the production of an economical, high-quality food supply throughout the world. The regulatory system in the United States is designed to prevent the entry of unacceptable residues into the food supply. To address the comple
Autor:
Patricia Saunders, Michael K. Hoffman, Cynthia L. Deyrup, Margaret Lorentzsen, W. R. Sutton, Richard Zaylskie, Nelson Clinch, Janice Huwe
Publikováno v:
Environmental sciencetechnology. 40(17)
To obtain information on dioxin levels in the human diet, the Food Safety and Inspection Service of the United States Department of Agriculture recently determined levels of dioxin-like compounds (dioxins/dibenzofurans/PCBs) in four major slaughter c
Autor:
Jennifer Giroux, Kirby Kruger, Adam Karpati, Helen Schurz Rogers, Patricia M. Griffin, Abdel-Razak M. Kadry, Michael K. Hoffman, Jennifer Martinelli Souza, Mike Hoekstra, Meg Simons, Alden K. Henderson, Ellen B. Steinberg, Nina N. Marano
Publikováno v:
Journal of food protection. 69(7)
From October 1997 through March 1998, three outbreaks of gastrointestinal illness among school children were linked to company A burritos. In September 1998, a similar outbreak occurred in three North Dakota schools following lunches that included co
Publikováno v:
Organic Mass Spectrometry. 14:9-16
The negative ion chemical ionization mass spectra of polychlorinated dibenzo-p-dioxins using oxygen, methane and methane/oxygen are reported together with their methane positive ion chemical ionization mass spectra and conventional electron impact sp
Publikováno v:
Journal of Clinical Immunology. 2:205-213
Antigen-specific antibody responses were investigated in 32 hypogammaglobulinemic patients with common variable immunodeficiency following in vitro sensitization of their peripheral blood lymphocyte cultures with sheep red blood-cell determinants. An
Autor:
Marlin D. Friesen, Michael K. Hoffman
Publikováno v:
Organic Mass Spectrometry. 11:1101-1104
Ion kinetic energy spectrometry has been utilized to investigate the loss of CO from [p-Z-C6H4-CO]+ and [C6H5CO]+ ions generated from substituted acetophenones and benzo-phenones. The variation of the leaving group in forming the [C6H5CO]+ ion has no