Mareck U - Search Results

1

13C/12C ratios of endogenous urinary steroids investigated for doping control purposes.

Piper T, Flenker U, Mareck U, Schänzer W. Piper T, et al. Among authors: mareck u. Drug Test Anal. 2009 Feb;1(2):65-72. doi: 10.1002/dta.15. Drug Test Anal. 2009. PMID: 20355178

2

Determination of the origin of urinary norandrosterone traces by gas chromatography combustion isotope ratio mass spectrometry.

Hebestreit M, Flenker U, Fusshöller G, Geyer H, Güntner U, Mareck U, Piper T, Thevis M, Ayotte C, Schänzer W. Hebestreit M, et al. Among authors: mareck u. Analyst. 2006 Sep;131(9):1021-6. doi: 10.1039/b603668f. Epub 2006 Jul 28. Analyst. 2006. PMID: 17047802

3

Doping-control analysis of the 5alpha-reductase inhibitor finasteride: determination of its influence on urinary steroid profiles and detection of its major urinary metabolite.

Thevis M, Geyer H, Mareck U, Flenker U, Schänzer W. Thevis M, et al. Among authors: mareck u. Ther Drug Monit. 2007 Apr;29(2):236-47. doi: 10.1097/FTD.0b013e31803bb85d. Ther Drug Monit. 2007. PMID: 17417080 Clinical Trial.

4

Detection of dehydroepiandrosterone misuse by means of gas chromatography- combustion-isotope ratio mass spectrometry.

Mareck U, Geyer H, Flenker U, Piper T, Thevis M, Schänzer W. Mareck U, et al. Eur J Mass Spectrom (Chichester). 2007;13(6):419-26. doi: 10.1255/ejms.900. Eur J Mass Spectrom (Chichester). 2007. PMID: 18417762

5

Determination of 13C/12C ratios of endogenous urinary steroids: method validation, reference population and application to doping control purposes.

Piper T, Mareck U, Geyer H, Flenker U, Thevis M, Platen P, Schänzer W. Piper T, et al. Among authors: mareck u. Rapid Commun Mass Spectrom. 2008 Jul;22(14):2161-75. doi: 10.1002/rcm.3601. Rapid Commun Mass Spectrom. 2008. PMID: 18536069

6

Factors influencing the steroid profile in doping control analysis.

Mareck U, Geyer H, Opfermann G, Thevis M, Schänzer W. Mareck U, et al. J Mass Spectrom. 2008 Jul;43(7):877-91. doi: 10.1002/jms.1457. J Mass Spectrom. 2008. PMID: 18570179 Review.

7

Temporal indication of cannabis use by means of THC glucuronide determination.

Mareck U, Haenelt N, Geyer H, Guddat S, Kamber M, Brenneisen R, Thevis M, Schänzer W. Mareck U, et al. Drug Test Anal. 2009 Nov;1(11-12):505-10. doi: 10.1002/dta.106. Drug Test Anal. 2009. PMID: 20355165

8

Determination of 13C/12C ratios of urinary epitestosterone and its main metabolites 5alpha- and 5beta-androstane-3alpha, 17alpha-diol.

Piper T, Riemann P, Opfermann G, Mareck U, Geyer H, Vajiala G, Flenker U, Schänzer W. Piper T, et al. Among authors: mareck u. Drug Test Anal. 2009 Nov;1(11-12):576-86. doi: 10.1002/dta.53. Drug Test Anal. 2009. PMID: 20355174

9

Reporting and managing elevated testosterone/epitestosterone ratios--novel aspects after five years' experience.

Mareck U, Geyer H, Fusshöller G, Schwenke A, Haenelt N, Piper T, Thevis M, Schänzer W. Mareck U, et al. Drug Test Anal. 2010 Nov-Dec;2(11-12):637-42. doi: 10.1002/dta.234. Epub 2010 Nov 15. Drug Test Anal. 2010. PMID: 21204295

10

Investigations on changes in ¹³C/¹²C ratios of endogenous urinary steroids after pregnenolone administration.

Piper T, Schlug C, Mareck U, Schänzer W. Piper T, et al. Among authors: mareck u. Drug Test Anal. 2011 May;3(5):283-90. doi: 10.1002/dta.281. Epub 2011 Apr 28. Drug Test Anal. 2011. PMID: 21538944

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