Výsledky vyhledávání - "Richard J. Okoniewski"

Application of dispersive solid phase extraction for trace analysis of toxic chemicals in foods

Autor: Gavin Piester, Sarah Neely, Jordan Martin, Richard J. Okoniewski, Morgan Robinson, Natalia Ferreira da Cruz, Buu N. Tran

Publikováno v: Journal of Chromatography B. 1092:65-71

The objectives of this study were to develop and validate a method for the identification of toxic organic chemicals, including groups of controlled substances, alkaloids and pesticides that are highly toxic and considered threats to public health. T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f963134dc285050f8ae391ffda0e11
https://doi.org/10.1016/j.jchromb.2018.05.043

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Rapid method for the detection of rodenticides in contaminated foods

Autor: Buu N. Tran, Melinda Denn, Sarah Neely, Annie Djatsa, Richard J. Okoniewski

Publikováno v: Journal of Chromatography B. 1186:123005

Rodenticides are toxic chemicals used to control rodent populations and are among the most common household toxicants. Ingestion of foods contaminated with rodenticides may cause severe illness or death in humans and animals. A rapid analytical metho

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42fb0b463c337ea31e8822d038a2f5a3
https://doi.org/10.1016/j.jchromb.2021.123005

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Determination of Trace Amounts of Ethylene Glycol and its Analogs in Water Matrixes by Liquid Chromatography/Tandem Mass Spectrometry

Autor: Buu N. Tran, Robert L. Jansing, Kenneth M. Aldous, Anthony Bucciferro, Richard J. Okoniewski

Publikováno v: Journal of AOAC INTERNATIONAL. 97:232-237

Contamination of drinking water by ethylene glycol (EG) is a public health concern. EG causes adverse health effects in humans and animals, including cardiopulmonary and acute renal failure. EGand other glycols, such as propylene glycol (PG) are majo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cbbf7f44aba2689d84ad18dd38a28661
https://doi.org/10.5740/jaoacint.12-198

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Methylmercury inhibits dopaminergic function in rat pup synaptosomes in an age-dependent manner

Autor: Anne Dreiem, Richard F. Seegal, Mangting Shan, Richard J. Okoniewski, Susana Sanchez-Morrissey

Publikováno v: Neurotoxicology and Teratology. 31:312-317

Methylmercury (MeHg) is an environmental neurotoxicant that is especially harmful during brain development. Previously, we found greater sensitivity to MeHg-induced oxidative stress and greater loss of mitochondrial membrane potential in synaptosomes

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a33636a2ccdb13778524f9d35ed60dc
https://doi.org/10.1016/j.ntt.2009.05.001

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Effects ofin Uteroand Lactational Exposure of the Laboratory Rat to 2,4,2′,4′- and 3,4,3′,4′-Tetrachlorobiphenyl on Dopamine Function

Autor: Richard F. Seegal, Richard J. Okoniewski, Karl O. Brosch

Publikováno v: Toxicology and Applied Pharmacology. 146:95-103

Offspring of Sprague–Dawley derived dams were exposed to either 2,4,2′,4′-tetrachlorobiphenyl (TCB) (1, 10, or 20 mg/(kg·day)) or 3,4,3′,4′-TCB (0.1 or 1 mg/(kg·day)) from gestational Day 6 through weaning by providing the dams with cooki

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94bce046d9b2af320bebb8c7f6e2e808
https://doi.org/10.1006/taap.1997.8226

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Polychlorinated biphenyls and polybrominated diphenyl ethers alter striatal dopamine neurochemistry in synaptosomes from developing rats in an additive manner

Autor: Karl O. Brosch, Anne Dreiem, Richard J. Okoniewski, Richard F. Seegal, Veronica M. Miller

Publikováno v: Toxicological sciences : an official journal of the Society of Toxicology. 118(1)

Polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) are widespread environmental contaminants associated with changes in behavior and neurochemical function in laboratory animals and behavioral deficits in children. PCBs and P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::55041211d7c358e1049808a73d987a37
https://pubmed.ncbi.nlm.nih.gov/20671024

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Use of methanol for the efficient extraction and analysis of melamine and cyanuric acid residues in dairy products and pet foods

Autor: Richard J. Okoniewski, Robin Storm, Kenneth M. Aldous, Buu N. Tran, Robert L. Jansing

Publikováno v: Journal of agricultural and food chemistry. 58(1)

The recent worldwide shortage of acetonitrile has prompted the development of a new method using methanol as an alternative organic solvent in the extraction and liquid chromatographic analysis of melamine and cyanuric acid that may be present as con

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af00590faba8492897209158b1f43603
https://pubmed.ncbi.nlm.nih.gov/19904985

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The degree of PCB chlorination determines whether the rise in urinary homovanillic acid production in rats is peripheral or central in origin

Autor: Richard J. Okoniewski, Karl O. Brosch, Richard F. Seegal

Publikováno v: Toxicology and Applied Pharmacology. 96:560-564

Commercial mixtures of polychlorinated biphenyls (PCBs, Arcolor 1016, 1254, and 1260) differing in their degree of chlorination and their accumulation in the brain were employed along with a peripheral monoamine oxidase inhibitor, debrisoquin sulfate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f6b978a58ff80dee106b686784b5fda3
https://doi.org/10.1016/0041-008x(88)90015-4

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