Výsledky vyhledávání - "Ronald R Flegel"

Performance of Hair Testing for Cocaine Use—Comparison of Five Laboratories Using Blind Reference Specimens

Autor: E Dale Hart, Svante Vikingsson, Ruth E Winecker, Amy L Evans, Edward J Cone, John M Mitchell, Eugene D Hayes, Ronald R Flegel

Publikováno v: Journal of Analytical Toxicology. 47:154-161

The purpose of this study was to compare results from five commercial hair testing laboratories conducting workplace drug testing with regard to bias, precision, selectivity and decontamination efficiency. Nine blind hair specimens, including cocaine

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d461e1319f692e38faf89e4409899a5
https://doi.org/10.1093/jat/bkac066

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Cannabinoid Content and Label Accuracy of Hemp-Derived Topical Products Available Online and at National Retail Stores

Autor: Tory R. Spindle, Dennis J. Sholler, Edward J. Cone, Timothy P. Murphy, Mahmoud ElSohly, Ruth E. Winecker, Ronald R. Flegel, Marcel O. Bonn-Miller, Ryan Vandrey

Publikováno v: JAMA network open. 5(7)

Products containing cannabinoids such as cannabidiol (CBD) have proliferated since 2018, when the Agriculture Improvement Act removed hemp (ie, cannabis containing0.3% Δ9-tetrahydrocannabinol [THC]) from the US controlled substances list. Topical ca

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c262f1b765906a6c2797ca2d78b81ef5
https://pubmed.ncbi.nlm.nih.gov/35857320

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Update on Urine Adulterants and Synthetic Urine Samples to Subvert Urine Drug Testing

Autor: Svante Vikingsson, Shannon T Krauss, Ruth E Winecker, Ronald R Flegel, Eugene D Hayes

Publikováno v: Journal of analytical toxicology. 46(7)

To avoid a positive urine drug test, donors might try to subvert the test, either by adulterating the specimen with a product designed to interfere with testing or by substituting the specimen for a synthetic urine. A market search conducted in Decem

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::af5bd0702cd538a45ebb0bb584325526
https://pubmed.ncbi.nlm.nih.gov/35639619

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Prevalence of Cannabidiol, ∆9- and ∆8-Tetrahydrocannabinol and Metabolites in Workplace Drug Testing Urine Specimens

Autor: Svante Vikingsson, Ruth E Winecker, Edward J Cone, David J Kuntz, Brian Dorsey, Martin Jacques, Melanie Senter, Ronald R Flegel, Eugene D Hayes

Publikováno v: Journal of analytical toxicology. 46(8)

Given the recent popularity of cannabidiol (CBD) use and the emergence of ∆8-tetrahydrocannabinol (∆8-THC), the prevalence and concentrations of these and other cannabinoids were investigated in 2,000 regulated and 4,000 non-regulated specimens f

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::212002557165ee16e066975259840a41
https://pubmed.ncbi.nlm.nih.gov/35260906

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Prescription Opioids. I. Metabolism and Excretion Patterns of Oxycodone in Urine Following Controlled Single Dose Administration

Autor: Edward J, Cone, Rebecca, Heltsley, David L, Black, John M, Mitchell, Charles P, Lodico, Ronald R, Flegel

Publikováno v: Journal of Analytical Toxicology. 37:255-264

The ongoing epidemic of prescription opioid abuse in the United States has prompted interest in semi-synthetic opioids in the federal workplace drug testing program. This study characterized the metabolism and disposition of oxycodone (OC) in human u

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c392904c5d853030bafe367a02355cc
https://doi.org/10.1093/jat/bkt031

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Evaluation of the 20% D-methamphetamine requirement for determining illicit use of methamphetamine in urine

Autor: Ronald R. Flegel, Francis M. Esposito, John M. Mitchell, Susan Crumpton

Publikováno v: Journal of analytical toxicology. 36(6)

In urine drug testing, enantiomer analysis is used to determine whether a positive methamphetamine result could be due to use of an over-the-counter (OTC) nasal inhaler containing L-methamphetamine. D-methamphetamine at more than 20% of the total is

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f35f22b958cb3fd9528add1c3e6faca2
https://pubmed.ncbi.nlm.nih.gov/22586207

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