Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Georg Opfermann"'
Autor:
Andreas Thomas, Wilhelm Schänzer, Andreas Lagojda, Mark Sander, Georg Opfermann, Mario Thevis, Josef Dib, Sebastian Höppner, Dirk Kuehne
Publikováno v:
Drug Testing and Analysis. 7:1050-1056
Detailed structural information on metabolites serving as target analytes in clinical, forensic, and sports drug testing programmes is of paramount importance to ensure unequivocal test results. In the present study, the utility of collision cross se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b37c9e7c1af74d91be77fb2aaee2531b
https://doi.org/10.1002/dta.1907
https://doi.org/10.1002/dta.1907
Publikováno v:
Drug Testing and Analysis. 5:810-818
Anabolic-androgenic steroids (AAS) represent one of the most frequently detected classes of prohibited substances in doping controls. Due to their long-lasting beneficial effects on athletic performance, utmost retrospectivity via urine analysis is d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64f5fcde384d8caf371c78c22dfea93d
https://doi.org/10.1002/dta.1516
https://doi.org/10.1002/dta.1516
Autor:
Josef Zapp, Frank D. Sönnichsen, Maria Kristina Parr, Dorota Kwiatkowska, Georg Opfermann, Folker Westphal, Wilhelm Schänzer, Hans Geyer
Publikováno v:
Steroids. 76:540-547
New analogues of androgens that had never been available as approved drugs are marketed as "dietary supplement" recently. They are mainly advertised to promote muscle mass and are considered by the governmental authorities in various countries, as we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0514465100fa301a21290bce12fc36c8
https://doi.org/10.1016/j.steroids.2011.02.001
https://doi.org/10.1016/j.steroids.2011.02.001
Autor:
Maria Kristina Parr, Grigory Rodchenkov, Wilhelm Schänzer, Hans Geyer, Georg Opfermann, Gregor Fußhöller, Nils Schlörer
Publikováno v:
Toxicology Letters. 201:101-104
Since a few years more and more products have appeared on the market for dietary supplements containing steroids that had never been marketed as approved drugs, mostly without proper labeling of the contents. Syntheses and few data on pharmacological
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1cfcbc98c78b7281b8c7a229e501f73
https://doi.org/10.1016/j.toxlet.2010.11.018
https://doi.org/10.1016/j.toxlet.2010.11.018
Publikováno v:
Rapid Communications in Mass Spectrometry. 24:3171-3181
The application of a comprehensive gas chromatography/combustion/isotope ratio mass spectrometry-based method for the measurement of stable carbon isotopes of endogenous urinary steroids excreted as sulphates is presented. The key element in sample p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c5565746d025f4eb2258e35c9d1827f
https://doi.org/10.1002/rcm.4762
https://doi.org/10.1002/rcm.4762
Autor:
Ute Mareck, Wilhelm Schänzer, Hans Geyer, Phillip Riemann, Thomas Piper, Ulrich Flenker, Graziela Vajiala, Georg Opfermann
Publikováno v:
Drug Testing and Analysis. 1:576-586
Epitestosterone (17α-hydroxy-androst-4-en-3-one, EpiT) belongs to the list of prohibited substances of the World Anti-Doping Agency (WADA). Although it possesses no anabolic effect, it is presumed to be misused by athletes in order to mask administr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c200cf59e636b65087a109c2b593930
https://doi.org/10.1002/dta.53
https://doi.org/10.1002/dta.53
Publikováno v:
Journal of Mass Spectrometry. 43:877-891
Steroid profiling is one of the most versatile and informative screening tools for the detection of steroid abuse in sports drug testing. Concentrations and ratios of various endogenously produced steroidal hormones, their precursors and metabolites
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d4c6a68b10a62d1a82a7b086e865acf
https://doi.org/10.1002/jms.1457
https://doi.org/10.1002/jms.1457
Autor:
Thomas Piper, Gabriele Schulze, Rymantas Kazlauskas, Maria Kristina Parr, Nils Schlörer, Georg Opfermann, Wilhelm Schänzer
Publikováno v:
Rapid Communications in Mass Spectrometry. 22:321-329
In recent years products containing 6alpha-methylandrost-4-ene-3,17-dione have appeared on the sport supplement market. Scientific studies have proven aromatase inhibition and anabolic and mild androgenic properties; however, no preparation has been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::de1f227b84b7607f6a3f558ef6969333
https://doi.org/10.1002/rcm.3367
https://doi.org/10.1002/rcm.3367
Autor:
Maria Kristina Parr, Georg Opfermann, Wilhelm Schänzer, Michael Becker, Josef Zapp, Ulrike Bartz
Publikováno v:
Steroids. 72:545-551
In human sports doping control analysis most of the steroids are analyzed after enzymatic hydrolysis of the glucuronides as per-trimethylsilyl (TMS) derivatives applying gas chromatography-mass spectrometry (GC-MS). According to the recommendations o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39373896331be8220abaa46c606ee436
https://doi.org/10.1016/j.steroids.2007.03.006
https://doi.org/10.1016/j.steroids.2007.03.006
Autor:
Maria Kristina Parr, Nils Schlörer, Georg Opfermann, Franz-Josef Marner, Wilhelm Schänzer, Maxie Kohler, Mario Thevis
Publikováno v:
Steroids. 72:278-286
4-Hydroxyandrost-4-ene-3,17-dione is a second generation, irreversible aromatase inhibitor and commonly used as anti breast cancer medication for postmenopausal women. 4-Hydroxytestosterone is advertised as anabolic steroid and does not have any ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f17654cdbdb092dbe40c198cdb3890b5
https://doi.org/10.1016/j.steroids.2006.11.018
https://doi.org/10.1016/j.steroids.2006.11.018