Results 31 to 40 of about 47,224 (264)

Doping control of athletes

TrAC Trends in Analytical Chemistry, 1988
History The origin of the word doping is not certain. It first appeared in the English dictionaries at the end of the nineteenth century. The first reference to the use of doping by athletes was in 1864 during swimming competitions that were held in the canals of Amsterdam. The use of what is known as a ‘speedball’, a mixture of heroine and cocaine, by
Jong, E.G. de, Maes, R.A.A., Rossum, J.M.   +2 more
openaire   +2 more sources

Tailored Hierarchical Porous Copper Architectures via Three Dimensional Printing and Pressure‐less Sintering for Next‐Generation Lithium‐Metal Batteries

Advanced Engineering Materials, EarlyView.
A hierarchical porous copper current collector is fabricated via three‐dimensional printing combined with pressureless sintering to stabilize lithium metal anodes. The interconnected architecture lowers local current density, guides uniform Li deposition within pores, and suppresses dendrite growth.
Alok Kumar Mishra, Mukul Shukla
wiley   +1 more source

Proactive surveillance of foodborne bioactives by integrated dietary exposure and urinary excretion assessment

npj Science of Food
Unintentional ingestion of pharmacologically-active substances through foods and dietary supplements presents growing challenges for food safety and anti-doping regulation.
Hana Park, Junghyun Son
doaj   +1 more source

Controlling Molecular Doping in Organic Semiconductors [PDF]

Advanced Materials, 2017
AbstractThe field of organic electronics thrives on the hope of enabling low‐cost, solution‐processed electronic devices with mechanical, optoelectronic, and chemical properties not available from inorganic semiconductors. A key to the success of these aspirations is the ability to controllably dope organic semiconductors with high spatial resolution ...
Ian E. Jacobs, Adam J. Moulé
openaire   +4 more sources

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

Advanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Powder Optimization Strategies for Binder Jetting Printing of BaTiO3 and Ba0,6Sr0,4TiO3 Ceramics

Advanced Engineering Materials, EarlyView.
Powder optimization is investigated to enable binder jetting of BaTiO3 and Ba0.6Sr0.4TiO3 ferroelectric ceramics. The antagonistic relationship between flowability and binder compatibility is addressed through binder impregnation of granulated powders and fumed silica addition to fine powders.
Fanny Pruvost, Lionel Presmanes, Soléna Colin, Marie Vidal, Sophie Guillemet‐Fritsch   +4 more
wiley   +1 more source

Stable carbon isotope discrimination by human 3-hydroxy-3-methylglutaryl-coenzyme A reductase

Journal of Lipid Research, 2008
The aim of this study was to investigate the possible existence and magnitude of stable carbon isotope discrimination by human 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGR). The catalytic portion of HMGR was expressed and purified.
Svena M. Lüdke, Ulrich Flenker, Wilhelm Schänzer, Dietmar Schomburg   +3 more
doaj   +1 more source

Foodborne doping and supervision in sports

Food Science and Human Wellness, 2023
Cases of foodborne doping are frequently reported in sports events and can cause severe consequences for athletes. The foodborne doping can be divided into natural endogenous and artificially added foods according to the sources, including anabolic ...
Wei Chen, Xiaoyu Cheng, Yingnan Ma, Ning Chen   +3 more
doaj   +1 more source

Incorporation of Selenium into Sol–Gel‐Derived Bioactive Glass: Influence on Glass Structure, Bioactivity, and its Selective Cytotoxicity

Advanced Engineering Materials, EarlyView.
Selenium was incorporated into a sol–gel‐derived bioactive glass to enable sustained therapeutic ion release. The selenium‐containing glass preserved bioactivity while selectively inducing cytotoxicity in osteosarcoma cells and maintaining osteoblastic viability.
Breno Rocha Barrioni, Thalita Marcolan Valverde, Talita Martins, Guilherme Mattos Jardim Costa, Alfredo Miranda de Goes, Marcello Rosa Dumont, Eduardo Henrique Martins Nunes, Marivalda de Magalhães Pereira   +7 more
wiley   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source