Nutritional supplements cross-contaminated and faked with doping substances

von Geyer, Hans (Autor), ... Parr, Maria Kristina (Autor), Köhler, Karsten (Autor), Mareck, Ute (Autor), Schänzer, Wilhelm (Autor), Thevis, Mario (Autor)
Erschienen in Journal of mass spectrometry : JMS, 43 (2008), 7 (Sports doping explored), S. 892-902, Lit.

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

von Piper, Thomas (Autor), ... Schlug, Christoph (Autor), Mareck, Ute (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Drug testing and analysis, 3 (2011), 5, S. 283-290, Lit.

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

von Thevis, Mario (Autor), ... Geyer, Hans (Autor), Mareck, Ute (Autor), Flenker, Ulrich (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Therapeutic drug monitoring, 29 (2007), 2, S. 236-247, Lit.

Detection of manipulation in doping control urine sample collection : a multidisciplinary approach to determine identical urine samples

von Thevis, Mario (Autor), ... Geyer, Hans (Autor), Mareck, Ute (Autor), Sigmund, Gerd (Autor), Henke, Jürgen (Autor), Henke, Lotte (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Analytical and bioanalytical chemistry, 388 (2007), 7, S. 1539-1543, Lit.

Identification of the aromatase inhibitor letrozole in urine by gas chromatography/mass spectrometry

von Mareck, Ute (Autor), ... Sigmund, Gerd (Autor), Opfermann, Georg (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Rapid communications in mass spectrometry, 19 (2005), 24, S. 3689-3693, Lit.

High amounts of 17-methylated anabolic-androgenic steroids in effervescent tablets on the dietary supplement market

von Parr, Maria K. (Autor), ... Geyer, Hans (Autor), Hoffmann, Bernhard (Autor), Köhler, Karsten (Autor), Mareck, Ute (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Biomedical chromatography, 21 (2007), 2, S. 164-168, Lit.

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

von Mareck, Ute (Autor), ... Geyer, Hans (Autor), Flenker, Ulrich (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in European journal of mass spectrometry, 13 (2007), 6, S. 419-426, Lit.

Nutritional supplements cross-contaminated and faked with prohormones, "classic" anabolic steroids and "designer steroids"

von Geyer, Hans (Autor), ... Köhler, Karsten (Autor), Mareck, Ute (Autor), Parr, Maria Kristina (Autor), Schänzer, Wilhelm (Autor), Thevis, Mario (Autor)
Erschienen in Effectiveness of the anti-doping fight: 2006 IAAF World Anti-Doping Symposium : book of proceedings ; 30 Septembre - 2 October 2006, Lausanne, Switzerland, Monaco: 2007, S. 95-99, Lit.

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

von Hebestreit, Moritz (Autor), ... Flenker, Ulrich (Autor), Fußhöller, Gregor (Autor), Geyer, Hans (Autor), Güntner, Ute (Autor), Mareck, Ute (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Ayotte, Christiane (Autor), Schänzer, Wilhelm (Autor)
Erschienen in The Analyst, 131 (2006), 9, S. 1021-1026, Lit.

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

von Thevis, Mario (Autor), ... Geyer, Hans (Autor), Mareck, Ute (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Journal of mass spectrometry : JMS, 40 (2005), 7, S. 955-962, Lit.

Factors influencing the steroid profile in doping control analysis

von Mareck, Ute (Autor), ... Geyer, Hans (Autor), Opfermann, Georg (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Journal of mass spectrometry : JMS, 43 (2008), 7 (Sports doping explored), S. 877-891, Lit.

Recent advances in doping analysis (18) : Proceedings of the Manfred-Donike-Workshop ; 28th Cologne Workshop on Dope Analysis , 7th to 12th March 2010

von Schänzer, Wilhelm (Hrsg.), ... Geyer, Hans (Hrsg.), Gotzmann, Andrea (Hrsg.), Mareck, Ute (Hrsg.) Köln: Sportverl. Strauß (Verlag), 2010, 258 S.; CD-ROM, Lit.

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

von Piper, Thomas (Autor), ... Mareck, Ute (Autor), Geyer, Hans (Autor), Flenker, Ulrich (Autor), Thevis, Mario (Autor), Platen, Petra (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Rapid communications in mass spectrometry, 22 (2008), 14, S. 2161-2175, Lit.

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

von Mareck, Ute (Autor), ... Geyer, Hans (Autor), Fußhöller, Gregor (Autor), Schwenke, Anne (Autor), Haenelt, Nadine (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Drug testing and analysis, 2 (2010), 11/12, S. 637-642, Lit.

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

von Piper, Thomas (Autor), ... Riemann, Phillip (Autor), Opfermann, Georg (Autor), Mareck, Ute (Autor), Geyer, Hans (Autor), Vâjialã, Graziela (Autor), Flenker, Ulrich (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Drug testing and analysis, 1 (2009), 11/12, S. 576-586, Lit.

Direct quantification of Salbutamol in human urine by means of LC-MS/MS

von Thevis, Mario (Leiter) ...
Deutsche Sporthochschule Köln / Institut für Biochemie
Projektlaufzeit: 01/2006-02/2007

FLUX - "Sarcopenic Obesity" im Foschungsschwerpunkt "Modulation of Metabolic Fluxes by Physical Activity Patterns"

von Diel, Patrick Rene (Leiter) ...
Deutsche Sporthochschule Köln / Institut für Kreislaufforschung und Sportmedizin / Abteilung Molekulare und Zelluläre Sportmedizin
Projektlaufzeit: 03/2012-03/2015

Investigations into the concentration and metabolite profiles of stanozolol and LGD-4033 in blood plasma and seminal fluid using liquid chromatography high-resolution mass spectrom...

von Breuer, Johanna (Autor), ... Thomas, Andreas (Autor), Delahaut, Philippe (Autor), Schänzer, Wilhelm (Autor), Geyer, Hans (Autor), Thevis, Mario (Autor)
Erschienen in Analytical and bioanalytical chemistry, 415 (2023), 4, S. 669–681, Lit.

Synthese und Charakterisierung von Steroidglucuroniden

von Schänzer, Wilhelm (Leiter) ...
Deutsche Sporthochschule Köln / Institut für Biochemie
Projektlaufzeit: 07/1999-

Nachweis des Plasmavolumenexpanders Hydroxyethylstärke in Humanurin

von Schänzer, Wilhelm (Leiter) ...
Deutsche Sporthochschule Köln / Institut für Biochemie
Projektlaufzeit: 08/1998-06/2000