Elucidation of original and metabolic sources of Ephedrines by stable isotope analysis

von Schänzer, Wilhelm (Leiter) ...
Deutsche Sporthochschule Köln / Institut für Biochemie
Projektlaufzeit: 08/2006-02/2007

Excretion of 19-norandrosterone after consumption of boar meat

von Hülsemann, Frank (Autor), ... Fußhöller, Gregor (Autor), Lehn, Christine (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 12 (2020), 11/12 (The 38th Manfred Donike workshop on doping analysis), S. 1581-1586, Lit.

Do we excrete what we eat? : analysis of stable nitrogen isotope ratios of human urinary urea

von Hülsemann, Frank (Autor), ... Köhler, Karsten (Autor), Flenker, Ulrich (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Rapid communications in mass spectrometry, 31 (2017), 14, S. 1221-1227, Lit.

Isolation of bicarbonate from equine urine for isotope ratio mass spectrometry

von Hülsemann, Frank (Autor), ... Flenker, Ulrich (Autor), Machnik, Marc (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Isotopes in environmental and health studies, 43 (2007), 4, S. 267-273, Lit.

Effect of a controlled dietary change on carbon and nitrogen stable isotope ratios of human hair

von Hülsemann, Frank (Autor), ... Flenker, Ulrich (Autor), Köhler, Karsten (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Rapid communications in mass spectrometry, 23 (2009), 16, S. 2448-54, Lit.

Human dietary δ15N intake : representative data for principle food items

von Hülsemann, Frank (Autor), ... Köhler, Karsten (Autor), Braun, Hans (Autor), Schänzer, Wilhelm (Autor), Flenker, Ulrich (Autor)
Erschienen in American journal of physical anthropology, 152 (2013), 1, S. 58-66, Lit.

Elucidation of original and metabolic sources of ephedrines by stable isotope analysis

von Flenker, Ulrich (Autor), ... Hülsemann, Frank (Autor), Gougoulidis, Vassilios (Autor), Sigmund, Gerd (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (15) : Proceedings of the Manfred Donike Workshop ; 25th Cologne Workshop on Dope Analysis ; 25th February to 2nd March 2007, Köln: Sportverl. Strauß (Verlag), 2007, S. 209-216, Lit.

Improved performance and maintenance in gas chromatography/isotope ratio mass spectrometry by precolumn solvent removal

von Flenker, Ulrich (Autor), ... Hebestreit, Moritz (Autor), Piper, Thomas (Autor), Hülsemann, Frank (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Analytical chemistry, 79 (2007), 11, S. 4162-4168, Lit.

Authenticity control and identification of origin of synthetic creatine-monohydrate by isotope ratio mass spectrometry

von Hülsemann, Frank (Autor), ... Flenker, Ulrich (Autor), Parr, Maria Kristina (Autor), Geyer, Hans (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Food chemistry, 2011, 125, 2, S. 767-772, Lit.

Influence of changes in diet on the dynamics of 13C/12C-ratio in selected urinary steroids : part I: study design, 13C/12/C-ratio of applied foodstuffs and effect on anthropometric...

von Kuk, Carsten von (Autor), ... Flenker, Ulrich (Autor), Güntner, Ute (Autor), Hülsemann, Frank (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. 219-224, Lit.

Intracrine androgen metabolism : fundamentals and a new approach to make use of 13C/12C signals of endogenous steroids

von Flenker, Ulrich (Autor), ... Riemann, Phillip (Autor), Hülsemann, Frank (Autor), Gougoulidis, Vassilios (Autor), Thevis, Mario (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Recent advances in doping analysis (26) : Proceedings of the Manfred Donike Workshop ; 36th Cologne Workshop on Dope Analysis ; 23rd to 26th April 2018, Hellenthal: Sportverl. Strauß (Verlag), 2018, S. 36-42, Lit.

Case study : simulated and real-life energy expenditure during a 3-week expedition

von Köhler, Karsten (Autor), ... Hülsemann, Frank (Autor), Marées, Markus de (Autor), Braunstein, Björn (Autor), Braun, Hans (Autor), Schänzer, Wilhelm (Autor)
Erschienen in International journal of sport nutrition and exercise metabolism, 21 (2011), 6, S. 520-526, Lit.

Additional investigations in connection with atypical findings for 19-norandrosterone : a case study

von Fußhöller, Gregor (Autor), ... Geyer, Hans (Autor), Haenelt, Nadine (Autor), Hülsemann, Frank (Autor), Gougoulidis, Vassilios (Autor), Blatt, Christina (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (29) : Proceedings of the Manfred Donike Workshop ; 39th Cologne Workshop on Dope Analysis 22nd to 26th March 2021, Hellenthal: Sportverl. Strauß (Verlag), 2021, S. 38-40, Lit.

Case Study : atypical δ13C values of urinary norandrosterone

von Hülsemann, Frank (Autor), ... Gougoulidis, Vassilios (Autor), Schertel, Thomas (Autor), Fußhöller, Gregor (Autor), Flenker, Ulrich (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor)
Erschienen in Drug testing and analysis, 10 (2018), 11/12 (36th Cologne workshop: Advances in sports drug testing), S. 1728-1733, Lit.

Doping, Ernährung, Substratflüsse : Isotopenanalyse in der Sportwissenschaft

von Flenker, Ulrich (Autor), ... Riemann, Phillip (Autor), Weigt, Carmen (Autor), Stöver, Katja (Autor), Hülsemann, Frank (Autor), Diel, Patrick Rene (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Impulse, 20 (2015), 2, S. 38-45

Effects of estradiol, estrogen receptor subtype-selective agonists and genistein on glucose metabolism in leptin resistant female Zucker diabetic fatty (ZDF) rats

von Weigt, Carmen (Autor), ... Hertrampf, Torsten (Autor), Flenker, Ulrich (Autor), Hülsemann, Frank (Autor), Kurnaz, Pinar (Autor), Fritzemeier, Karl Heinrich (Autor), Diel, Patrick Rene (Autor)
Erschienen in The journal of steroid biochemistry and molecular biology, 154 (2015), S. 12-22, Lit.

Molecular effects of ER alpha- and beta-selective agonists on regulation of energy homeostasis in obese female Wistar rats

von Weigt, Carmen (Autor), ... Hertrampf, Torsten (Autor), Kluxen, Felix M. (Autor), Flenker, Ulrich (Autor), Hülsemann, Frank (Autor), Fritzemeier, Karl Heinrich (Autor), Diel, Patrick Rene (Autor)
Erschienen in Molecular and cellular endocrinology, 377 (2013), 1/2, S. 147-158, Lit.

The ratio 5aAdiol/E as indicator for the detection of testosterone doping in athletes with naturally low T/E : a case study

von Geyer, Hans (Autor), ... Fußhöller, Gregor (Autor), Haenelt, Nadine (Autor), Mareck, Ute (Autor), Blatt, Christina (Autor), Gougoulidis, Vassilios (Autor), Hülsemann, Frank (Autor), Piper, Thomas (Autor), Thevis, Mario (Autor)
Erschienen in Recent advances in doping analysis (28) : Proceedings of the Manfred Donike Workshop ; 38th Cologne Workshop on Dope Analysis 9th to 14th February 2020, Hellenthal: Sportverl. Strauß (Verlag), 2020, S. 90-93, Lit.

Prediction of human dietary δ(15)N intake from standardised food records : validity and precision of single meal and 24-h diet data

von Hülsemann, Frank (Autor), ... Köhler, Karsten (Autor), Wittsiepe, Jürgen (Autor), Wilhelm, Michael (Autor), Hilbig, Annett (Autor), Kersting, Mathilde (Autor), Braun, Hans (Autor), Flenker, Ulrich (Autor), Schänzer, Wilhelm (Autor)
Erschienen in Isotopes in environmental and health studies, 53 (2017), 4, S. 356-367, Lit.

Auf den Spuren der Botenläufer der Inka : ein Laufexperiment in den südamerikanischen Anden

von Hülsemann, Frank (Autor), ... Marées, Markus de (Autor), Flenker, Ulrich (Autor), Kuk, Carsten von (Autor), Schmidt, Annette (Autor), Meinicke, Ellen (Autor), Schänzer, Wilhelm (Autor), Mester, Joachim (Autor), Bloch, Wilhelm (Autor)
Erschienen in Forschung Innovation Technologie, 13 (2008), 1, S. 4-11, Lit.