T. Bieńkowski
7 Papers
10 Citations
T. Bieńkowski is an academic researcher. The author has contributed to research in topics: Vitamin D and neurology & Vitamin. The author has an hindex of 4, co-authored 7 publications.
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Papers
Improved sample preparation method for fast LC-MS/MS analysis of vitamin D metabolites in serum.
TL;DR: The developed chromatographic method has eliminated false positive signals for the 24,25(OH)2D3 metabolite and total analysis time is 5.5 min., while maintaining resolution necessary to separate the analyzed compounds.
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Ultra-Marathon-Induced Increase in Serum Levels of Vitamin D Metabolites: A Double-Blind Randomized Controlled Trial
Jan Mieszkowski,Błażej Stankiewicz,Andrzej Kochanowicz,Bartłomiej Niespodziński,Tomasz Kowalik,Michał A. Żmijewski,Konrad Kowalski,Rafał Rola,T. Bieńkowski,Jedrzej Antosiewicz +9 more
TL;DR: Ultra-marathon induces the mobilization of vitamin D into the blood, and the 24,25(OH)2D3 and 3-epi-25( OH)D3 increases imply that the exercise stimulates vitamin D metabolism.
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Determination of free tyrosine in equestrian supplements by LC–MS/MS and comparison of its quantity with total free amino acids content in view of doping control
TL;DR: In this paper, the first attempt to the assessment of horses exposure to tyrosine (TYR) during nutritional supplementation was demonstrated by quantification of unbound TYR and a total free amino acids (AAs), and subsequent determination of the ratio of TYR to AAs content in equestrian supplement samples.
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A rapid and eco-friendly method for determination of the main components of gamma-oryzanol in equestrian dietary and nutritional supplements by liquid chromatography-Tandem mass spectrometry.
Emilia Waraksa,Konrad Kowalski,Ewa Kłodzińska,Rafał Rola,Jarosław Ciekot,Wojciech Filipiak,T. Bieńkowski,Jacek Namieśnik +7 more
TL;DR: There is an urgent need to elaborate procedures for the estimation of horse exposure to GO during supplementation, as well as during routine analysis of supplements, according to the development and validation of the method for determination of the four main GO components.
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Evaluation of different biological matrices to assess the vitamin D status in newborns using LC-MS/MS
TL;DR: DBS could be used interchangeably with cord blood-derived serum to determine vitamin D status in neonates, and DBS samples could simplify the screening of vitamin Dstatus.
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