Quantification of theobromine and caffeine in saliva, plasma and urine via liquid chromatography–tandem mass spectrometry: A single analytical protocol applicable to cocoa intervention studies
Ptolemy, Adam S., Tzioumis, Emma, Thomke, Arjun, Rifai, Sami, Kellogg, Mark
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.02.2010)
Published in Journal of chromatography. B, Analytical technologies in the biomedical and life sciences (01.02.2010)
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Journal Article
Acute effects of ingestion of a novel whey-derived extract on vascular endothelial function in overweight, middle-aged men and women
Ballard, Kevin D., Kupchak, Brian R., Volk, Brittanie M., Mah, Eunice, Shkreta, Aida, Liptak, Cary, Ptolemy, Adam S., Kellogg, Mark S., Bruno, Richard S., Seip, Richard L., Maresh, Carl M., Kraemer, William J., Volek, Jeff S.
Published in British journal of nutrition (14.03.2013)
Published in British journal of nutrition (14.03.2013)
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Journal Article
The riddle of protein diagnostics: future bleak or bright?
Anderson, N Leigh, Ptolemy, Adam S, Rifai, Nader
Published in Clinical chemistry (Baltimore, Md.) (01.01.2013)
Published in Clinical chemistry (Baltimore, Md.) (01.01.2013)
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Journal Article
Electrokinetic probes for single-step screening of polyol stereoisomers: the virtues of ternary boronate ester complex formation
Kaiser, Claire, Segui-Lines, Giselle, D'Amaral, Jason C, Ptolemy, Adam S, Britz-McKibbin, Philip
Published in Chemical communications (Cambridge, England) (01.01.2008)
Published in Chemical communications (Cambridge, England) (01.01.2008)
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Journal Article
Abundant Depletion
Allegri Machado, Gabriella, Ptolemy, Adam S, Kellogg, Mark D, Peake, Roy W A
Published in Clinical chemistry (Baltimore, Md.) (01.09.2022)
Published in Clinical chemistry (Baltimore, Md.) (01.09.2022)
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Journal Article
Integrative Metabolomics for Characterizing Unknown Low-Abundance Metabolites by Capillary Electrophoresis-Mass Spectrometry with Computer Simulations
Lee, Richard, Ptolemy, Adam S, Niewczas, Liliana, Britz-McKibbin, Philip
Published in Analytical chemistry (Washington) (15.01.2007)
Published in Analytical chemistry (Washington) (15.01.2007)
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Journal Article
Optimizing Urine Drug Testing for Monitoring Medication Compliance in Pain Management
Melanson, Stacy E. F., Ptolemy, Adam S., Wasan, Ajay D.
Published in Pain medicine (Malden, Mass.) (01.12.2013)
Published in Pain medicine (Malden, Mass.) (01.12.2013)
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Journal Article
Modeling caffeine concentrations with the Stanford Caffeine Questionnaire: Preliminary evidence for an interaction of chronotype with the effects of caffeine on sleep
Nova, Philip, Hernandez, Beatriz, Ptolemy, Adam S, Zeitzer, Jamie M
Published in Sleep medicine (01.04.2012)
Published in Sleep medicine (01.04.2012)
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Journal Article
Ultra fast and sensitive liquid chromatography tandem mass spectrometry based assay for galactose-1-phosphate uridylyltransferase and galactokinase deficiencies
Li, Yijun, Ptolemy, Adam S., Harmonay, Lauren, Kellogg, Mark, Berry, Gerard T.
Published in Molecular genetics and metabolism (01.01.2011)
Published in Molecular genetics and metabolism (01.01.2011)
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Journal Article
A 9-month-old boy with seizures and discrepant urine tryptophan concentrations
Ptolemy, Adam S, Li, Yijun, Sanderson, Tamara, Khwaja, Omar, Berry, Gerard T, Kellogg, Mark
Published in Clinical chemistry (Baltimore, Md.) (01.04.2011)
Published in Clinical chemistry (Baltimore, Md.) (01.04.2011)
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Journal Article
Whey protein supplementation during resistance training augments lean body mass
Volek, Jeff S, Volk, Brittanie M, Gómez, Ana L, Kunces, Laura J, Kupchak, Brian R, Freidenreich, Daniel J, Aristizabal, Juan C, Saenz, Catherine, Dunn-Lewis, Courtenay, Ballard, Kevin D, Quann, Erin E, Kawiecki, Diana L, Flanagan, Shawn D, Comstock, Brett A, Fragala, Maren S, Earp, Jacob E, Fernandez, Maria L, Bruno, Richard S, Ptolemy, Adam S, Kellogg, Mark D, Maresh, Carl M, Kraemer, William J
Published in Journal of the American College of Nutrition (01.04.2013)
Published in Journal of the American College of Nutrition (01.04.2013)
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Journal Article
On-line sample preconcentration with chemical derivatization of bacterial biomarkers by capillary electrophoresis: A dual strategy for integrating sample pretreatment with chemical analysis
Ptolemy, Adam S., Le Bihan, Marianne, Britz-McKibbin, Philip
Published in Electrophoresis (01.11.2005)
Published in Electrophoresis (01.11.2005)
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Journal Article