Results 21 to 30 of about 357 (143)
Detection of anabolic androgenic steroids in serum samples
Drug Testing and Analysis, Volume 15, Issue 6, Page 678-688, June 2023., 2023 A method for detecting anabolic androgenic steroids was succesfully validated on an LC‐MS/MS instrument. Using this method, steroids in serum samples from two different administraiton studies were evaluated. Abstract When testing for anabolic androgenic steroids (AAS) outside sports communities, for example, in healthcare and forensic medicine, urine ...
Bahare Makvandi +6 more
wiley +1 more source
Drug Testing and Analysis, Volume 14, Issue 11-12, Page 1891-1903, November-December 2022., 2022 A method to determine the carbon isotope ratios of nine potentially pseudo‐endogenous steroids relevant to sports drug testing was developed and validated. Using established gas chromatography/combustion/isotope ratio mass spectrometry instrumentation, limits of quantification were determined at 10 ng/ml for a 20 ml urine aliquot for all analytes ...
Thomas Piper, Mario Thevis
wiley +1 more source
Annual banned‐substance review: Analytical approaches in human sports drug testing 2020/2021
Drug Testing and Analysis, Volume 14, Issue 1, Page 7-30, January 2022., 2022 Detection assays for drugs and methods of sports doping published between 2020 and 2021 are critically reviewed and evaluated in context with the Prohibited List 2021 as established by the World Anti‐Doping Agency. Abstract Most core areas of anti‐doping research exploit and rely on analytical chemistry, applied to studies aiming at further improving ...
Mario Thevis, Tiia Kuuranne, Hans Geyer
wiley +1 more source
Effects of structural characteristics of (un)conjugated steroid metabolites in their collision cross section value [PDF]
, 2023 In this work, the collision cross section (CCS) value of 103 steroids (including unconjugated metabolites and phase II metabolites conjugated with sulfate and glucuronide groups) was determined by liquid chromatography coupled to traveling wave ion ...
Alechaga Silva, Élida +5 more
core +1 more source
National Athletic Trainers\u27 Association Position Statement: Evaluation of Dietary Supplements for Performance Nutrition [PDF]
, 2013 Objectives: To help athletic trainers promote a food-first\u27 philosophy to support health and performance, understand federal and sport governing body rules and regulations regarding dietary supplements and banned substances, and become familiar with
Buell, Jackie L. +5 more
core +2 more sources
Rapid Communications in Mass Spectrometry, Volume 34, Issue 12, 30 June 2020., 2020 Rationale Gas chromatography coupled to electron ionization mass spectrometry (GC/EI‐MS) is used for routine screening of anabolic steroids in many laboratories after the conversion of polar groups into trimethylsilyl (TMS) derivatives. The aim of this work is to elucidate the origin and formation of common and subclass‐specific fragments in the mass ...
Annette Sophie Kollmeier +1 more
wiley +1 more source
Doping in sport: An analysis of sanctioned UK rugby union players between 2009 and 2015 [PDF]
, 2016 To inform anti-doping policy and practice, it is important to understand the complexities of doping. The purpose of this study was to collate and systematically examine the reasoned decisions published by UK Anti-Doping for doping sanctions in rugby ...
Backhouse, SH, Whitaker, L
core +1 more source
Intended or Unintended Doping? A Review of the Presence of Doping Substances in Dietary Supplements Used in Sports. [PDF]
Nutrients, 2017 Introduction: The use of dietary supplements is increasing among athletes, year after year. Related to the high rates of use, unintentional doping occurs.
Martínez-Sanz JM +5 more
europepmc +5 more sources
Rapid Communications in Mass Spectrometry, Volume 34, Issue 12, 30 June 2020., 2020 Rationale The misuse of 7‐oxo‐DHEA (3β‐hydroxyandrost‐5‐ene‐7,17‐dione) is prohibited according to the World Anti‐Doping Agency (WADA) code. Nevertheless, it is easily available as a dietary supplement and from black market sources. In two recent doping control samples, significant amounts of its main metabolite 7β‐OH‐DHEA were identified ...
Thomas Piper +5 more
wiley +1 more source
The action of physiological and synthetic steroids on the calcium channel CatSper in human sperm. [PDF]
Front Cell Dev Biol, 2023 The sperm-specific channel CatSper (cation channel of sperm) controls the intracellular Ca2+ concentration ([Ca2+]i) and plays an essential role in sperm function.
Wehrli L +9 more
europepmc +3 more sources