Geyer H - Search Results

1

Reference ranges for urinary concentrations and ratios of endogenous steroids, which can be used as markers for steroid misuse, in a Caucasian population of athletes.

Van Renterghem P, Van Eenoo P, Geyer H, Schänzer W, Delbeke FT. Van Renterghem P, et al. Among authors: geyer h. Steroids. 2010 Feb;75(2):154-63. doi: 10.1016/j.steroids.2009.11.008. Epub 2009 Dec 3. Steroids. 2010. PMID: 19962394 Review.

2

Detection of dihydrotestosterone (DHT) doping: alterations in the steroid profile and reference ranges for DHT and its 5 alpha-metabolites.

Donike M, Ueki M, Kuroda Y, Geyer H, Nolteernsting E, Rauth S, Schänzer W, Schindler U, Völker E, Fujisaki M. Donike M, et al. Among authors: geyer h. J Sports Med Phys Fitness. 1995 Dec;35(4):235-50. J Sports Med Phys Fitness. 1995. PMID: 8776070

3

Screening for unknown synthetic steroids in human urine by liquid chromatography-tandem mass spectrometry.

Thevis M, Geyer H, Mareck U, Schänzer W. Thevis M, et al. Among authors: geyer h. J Mass Spectrom. 2005 Jul;40(7):955-62. doi: 10.1002/jms.873. J Mass Spectrom. 2005. PMID: 15934041

4

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: geyer h. Analyst. 2006 Sep;131(9):1021-6. doi: 10.1039/b603668f. Epub 2006 Jul 28. Analyst. 2006. PMID: 17047802

5

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: geyer h. Ther Drug Monit. 2007 Apr;29(2):236-47. doi: 10.1097/FTD.0b013e31803bb85d. Ther Drug Monit. 2007. PMID: 17417080 Clinical Trial.

6

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. Among authors: geyer h. Eur J Mass Spectrom (Chichester). 2007;13(6):419-26. doi: 10.1255/ejms.900. Eur J Mass Spectrom (Chichester). 2007. PMID: 18417762

7

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: geyer h. Rapid Commun Mass Spectrom. 2008 Jul;22(14):2161-75. doi: 10.1002/rcm.3601. Rapid Commun Mass Spectrom. 2008. PMID: 18536069

8

Factors influencing the steroid profile in doping control analysis.

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

9

Validation of an extended method for the detection of the misuse of endogenous steroids in sports, including new hydroxylated metabolites.

Van Renterghem P, Van Eenoo P, Van Thuyne W, Geyer H, Schänzer W, Delbeke FT. Van Renterghem P, et al. Among authors: geyer h. J Chromatogr B Analyt Technol Biomed Life Sci. 2008 Dec 15;876(2):225-35. doi: 10.1016/j.jchromb.2008.10.047. Epub 2008 Nov 6. J Chromatogr B Analyt Technol Biomed Life Sci. 2008. PMID: 19010743

10

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: geyer h. Drug Test Anal. 2009 Nov;1(11-12):576-86. doi: 10.1002/dta.53. Drug Test Anal. 2009. PMID: 20355174

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