Kinetic isotope effects during metabolism of ∆4-steroids

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (9) : Proceedings of the Manfred Donike Workshop ; 19th Cologne Workshop on dope analysis ; 18th to 23rd March 2001, Köln: Sport u. Buch Strauß (Verlag), 2001, S. 179-185, Lit.

13C/12C-ratios in caffeine from different sources and in urinary excreted caffeine

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (9) : Proceedings of the Manfred Donike Workshop ; 19th Cologne Workshop on dope analysis ; 18th to 23rd March 2001, Köln: Sport u. Buch Strauß (Verlag), 2001, S. 187-190, Lit.

Expression of differences in isotopic composition

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (11) : Proceedings of the Manfred Donike Workshop ; 21st Cologne Workshop on Dope Analysis ; 16th to 21st March 2003, Köln: Sport u. Buch Strauß (Verlag), 2003, S. 179-182, Lit.

Which factors control 13C/12 C-ratios of urinary steroids?

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor), Lüdke, S. (Autor), Güntner, U. (Autor)
Erschienen in Recent advances in doping analysis (16) : Proceedings of the Manfred Donike Workshop ; 26th Cologne Workshop on Dope Analysis ; 24th to 29th February 2008, Köln: Sportverl. Strauß (Verlag), 2008, S. 163-170, Lit.

Stability of steroid profiles (5) : the annual rhythm of urinary ratios and excretion rates of endogenous steroids in female and its menstrual dependency

von Mareck-Engelke, U. (Autor), ... Flenker, U. (Autor), Donike, M. (Autor)
Erschienen in Recent advances in doping analysis (3) : in memoriam Manfred Donike ; Proceedings of the 13th Cologne Workshop on Dope Analysis ; 12th to 17th March 1995, Köln: Sport u. Buch Strauß (Verlag), 1996, S. 177-189, Lit.

Stability of steroid profiles (6) : the influence of oral contraceptives on steroid profiles

von Mareck-Engelke, U. (Autor), ... Flenker, U. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (4) : Proceedings of the Manfred Donike Workshop ; 14th Cologne Workshop on Dope Analysis ; 17th to 22nd March 1996, Köln: Sport u. Buch Strauß (Verlag), 1997, S. 139-157, Lit.

Determination of D/H ratios of endogenous urinary steroids : method validation and first results

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor), Piper, T. (Autor)
Erschienen in Recent advances in doping analysis (16) : Proceedings of the Manfred Donike Workshop ; 26th Cologne Workshop on Dope Analysis ; 24th to 29th February 2008, Köln: Sportverl. Strauß (Verlag), 2008, S. 181-190, Lit.

Case study : GC/C/IRMS data of an unusual urine sample

von Mareck, U. (Autor), ... Gougoulidis, V. (Autor), Flenker, U. (Autor), Schänzer, W. (Autor)
Erschienen in Recent advances in doping analysis (22) : Proceedings of the Manfred-Donike-Workshop ; 32nd Cologne Workshop on Dope Analysis ; 30th March to 4th April 2014, Köln: Sportverl. Strauß (Verlag), 2014, S. 146-149, Lit.

D/H-Isotope analysis of endogenous steroids : first results

von Güntner, U. (Autor), ... Flenker, U. (Autor), Ayotte, C. (Autor), Ueki, M. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (12) : Proceedings of the Manfred Donike Workshop ; 22th Cologne Workshop on Dope Analysis ; 7th to 12th March 2004, Köln: Sport u. Buch Strauß (Verlag), 2004, S. 251-259, Lit.

Preliminary results regarding the detection of the misuse of testosterone gel

von Geyer, Hans (Autor), ... Flenker, U. (Autor), Mareck, U. (Autor), Sommer, F. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (12) : Proceedings of the Manfred Donike Workshop ; 22th Cologne Workshop on Dope Analysis ; 7th to 12th March 2004, Köln: Sport u. Buch Strauß (Verlag), 2004, S. 121-127, Lit.

Presentation of the IRMS results of suspicious samples with elevated T/EpiT ratios in 2005

von Piper, T. (Autor), ... Gougoulidis, V. (Autor), Flenker, U. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (14) : Proceedings of the Manfred Donike Workshop ; 24th Cologne Workshop on Dope Analysis ; 4th to 9th June 2006, Köln: Sportverl. Strauß (Verlag), 2006, S. 289-298, Lit.

Influence of storage on the mobility values of human erythropoietin

von Lüdke, A. (Autor), ... Flenker, U. (Autor), Lüdke, S. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (17) : Proceedings of the Manfred Donike Workshop ; 27th Cologne Workshop on Dope Analysis ; 1st to 6th March 2009, Köln: Sportverl. Strauß (Verlag), 2009, S. 273-276, Lit.

Influence of ethanol on steroid profile parameters

von Mareck-Engelke, U. (Autor), ... Geyer, Hans (Autor), Schindler, U. (Autor), Flenker, U. (Autor), Iffland, R. (Autor), Donike, M. (Autor)
Erschienen in Recent advances in doping analysis (3) : in memoriam Manfred Donike ; Proceedings of the 13th Cologne Workshop on Dope Analysis ; 12th to 17th March 1995, Köln: Sport u. Buch Strauß (Verlag), 1996, S. 143-155, Lit.

Population based reference ranges and additional screening marker for the improvement of the detection of dehydroepiandrosterone misuse

von Mareck, U. (Autor), ... Geyer, Hans (Autor), Flenker, U. (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor), Piper, T. (Autor)
Erschienen in Recent advances in doping analysis (16) : Proceedings of the Manfred Donike Workshop ; 26th Cologne Workshop on Dope Analysis ; 24th to 29th February 2008, Köln: Sportverl. Strauß (Verlag), 2008, S. 149-150, Lit.

Determination of gamma-butyrolactone (GBL) - A tool for the detection of the administration of gamma-hydroxybutyric acid (GHB)

von Sigmund, G. (Autor), ... Flenker, U. (Autor), Schänzer, Wilhelm (Autor), Gougoulidis, V. (Autor)
Erschienen in Recent advances in doping analysis (16) : Proceedings of the Manfred Donike Workshop ; 26th Cologne Workshop on Dope Analysis ; 24th to 29th February 2008, Köln: Sportverl. Strauß (Verlag), 2008, S. 325-328, Lit.

Urinary steroid sulphates : sample preparation, reference values and investigations in biosynthesis and metabolism

von Kuk, J. Carsten von (Autor), ... Flenker, U. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (11) : Proceedings of the Manfred Donike Workshop ; 21st Cologne Workshop on Dope Analysis ; 16th to 21st March 2003, Köln: Sport u. Buch Strauß (Verlag), 2003, S. 169-178, Lit.

Detection and classification of different male steroid profiles by means of multivariate statistics

von Flenker, U. (Autor), ... Nolteernsting, E. (Autor), Schänzer, Wilhelm (Autor), Donike, M. (Autor)
Erschienen in Recent advances in doping analysis (4) : Proceedings of the Manfred Donike Workshop ; 14th Cologne Workshop on Dope Analysis ; 17th to 22nd March 1996, Köln: Sport u. Buch Strauß (Verlag), 1997, S. 203-210, Lit.

Mission (im)possible? Gas chromatography/combustion/isotope ratio mass spectrometry of trace amounts of urinary norandrosterone

von Hebestreit, M. (Autor), ... Flenker, U. (Autor), Fußhöller, G. (Autor), Güntner, U. (Autor), Geyer, Hans (Autor), Mareck, U. (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (13) : Proceedings of the Manfred Donike Workshop ; 23th Cologne Workshop on Dope Analysis ; 27th February to 4th March 2005, Köln: Sport u. Buch Strauß (Verlag), 2005, S. 209-218, Lit.

Stability tests for haematologic parameters in an anti-doping context

von Flenker, U. (Autor), ... Schänzer, Wilhelm (Autor), Voss, S.C. (Autor), Majer, B. (Autor)
Erschienen in Recent advances in doping analysis (16) : Proceedings of the Manfred Donike Workshop ; 26th Cologne Workshop on Dope Analysis ; 24th to 29th February 2008, Köln: Sportverl. Strauß (Verlag), 2008, S. 345, Lit.

Measurement of 13C/12C-ratios to confirm misuse of endogenous steroids

von Flenker, U. (Autor), ... Horning, S. (Autor), Nolteernsting, E. (Autor), Geyer, Hans (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (6) : Proceedings of the Manfred Donike Workshop ; 16th Cologne Workshop on Dope Analysis ; 15th to 20th March 1998, Köln: Sport u. Buch Strauß (Verlag), 1999, S. 243-256, Lit.