Search Results - "McGuffey, James E"

Validation of a LC-MS/MS method for quantifying urinary nicotine, six nicotine metabolites and the minor tobacco alkaloids--anatabine and anabasine--in smokers' urine by McGuffey, James E, Wei, Binnian, Bernert, John T, Morrow, John C, Xia, Baoyun, Wang, Lanqing, Blount, Benjamin C

“…Tobacco use is a major contributor to premature morbidity and mortality. The measurement of nicotine and its metabolites in urine is a valuable tool for…”
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Sensitive Quantification of Cannabinoids in Milk by Alkaline Saponification–Solid Phase Extraction Combined with Isotope Dilution UPLC–MS/MS by Wei, Binnian, McGuffey, James E, Blount, Benjamin C, Wang, Lanqing

“…Maternal exposure to marijuana during the lactation periodeither active or passivehas prompted concerns about transmission of cannabinoids to breastfed…”
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A high-throughput robotic sample preparation system and HPLC-MS/MS for measuring urinary anatabine, anabasine, nicotine and major nicotine metabolites by Wei, Binnian, Feng, June, Rehmani, Imran J., Miller, Sharyn, McGuffey, James E., Blount, Benjamin C., Wang, Lanqing

“…Most sample preparation methods characteristically involve intensive and repetitive labor, which is inefficient when preparing large numbers of samples from…”
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Analysis of the Tobacco-Specific Nitrosamine 4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanol in Urine by Extraction on a Molecularly Imprinted Polymer Column and Liquid Chromatography/Atmospheric Pressure Ionization Tandem Mass Spectrometry by Xia, Yang, McGuffey, James E, Bhattacharyya, Sumita, Sellergren, Börje, Yilmaz, Ecevit, Wang, Lanqing, Bernert, John T

“…The tobacco-specific nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) is present in the urine of tobacco users and, at lower concentrations, in…”
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Time Course of Nicotine and Cotinine Incorporation into Samples of Nonsmokers' Beard Hair Following a Single Dose of Nicotine Polacrilex by Bernert, John T., Alexander, Joseph R., Sosnoff, Connie S., McGuffey, James E.

“…Hair nicotine and cotinine have been proposed as longer-term markers of exposure to secondhand smoke. In this study, we evaluated the rate and extent of…”
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Use of Cotinine Immunoassay Test Strips for Preclassifying Urine Samples from Smokers and Nonsmokers Prior to Analysis by LC-MS-MS by Bernert, John T., Harmon, Tia L., Sosnoff, Connie S., McGuffey, James E.

“…Cotinine biomarker measurements involving both smokers and nonsmokers must accommodate a broad range of concentrations. Thus, we have routinely preclassified…”
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Comparison of Serum and Salivary Cotinine Measurements by a Sensitive High-Performance Liquid Chromatography-Tandem Mass Spectrometry Method as an Indicator of Exposure to Tobacco Smoke Among Smokers and Nonsmokers by Bernert, John T., McGuffey, James E., Morrison, Melissa A., Pirkle, James L.

“…Exposure to tobacco smoke, both from active smoking and from passive exposure to environmental tobacco smoke, can be monitored by measuring cotinine, a…”
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Increases in tobacco exposure biomarkers measured in non-smokers exposed to sidestream cigarette smoke under controlled conditions by Bernert, John T., Gordon, Sydney M., Jain, Ram B., Brinkman, Marielle C., Sosnoff, Connie S., Seyler, Tiffany H., Xia, Yang, McGuffey, James E., Ashley, David L., Pirkle, James L., Sampson, Eric J.

“…National surveys of the exposure of non-smokers to secondhand smoke based on serum cotinine analyses have consistently identified certain groups within the…”
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Use of continine immunoassay test strips for preclassifying urine samples from smokers and nonsmokers prior to analysis by LC-MS-MS by Bernert, John T, Harmon, Tia L, Sosnoff, Connie S, McGuffey, James E

“…Cotinine biomarker measurements involving both smokers and nonsmokers must accommodate a broad range of concentrations. Thus, we have routinely preclassified…”
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Hemoglobin Cheverly: an unstable hemoglobin associated with chronic mild anemia by Yeager, A M, Zinkham, W H, Jue, D L, Winslow, R M, Johnson, M H, McGuffey, J E, Moo-Penn, W F

“…The evaluation of a family with chronic mild anemia led to the identification of a new unstable hemoglobin (Hemoglobin Cheverly). Modest anemia and…”
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Hemoglobin Rio Grande [beta 8 (A5) Lys leads to Thr] a new variant found in a Mexican-American family by Moo-Penn, W F, Johnson, M H, McGuffey, J E, Jue, D L, Therrell, Jr, B L

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Determination of "free" glycerol in human serum reference materials by isotope-dilution gas chromatography-mass spectrometry by Bernert, Jr, J T, Bell, C J, McGuffey, J E, Waymack, P P

“…Serum free glycerol analyses are an important part of the preparation and evaluation of human serum reference materials used for the quality assurance of…”
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