Results 51 to 60 of about 9,362 (304)

Influence of an Argon/Silane Atmosphere on the Temperature of a Thermal Plasma

Advanced Engineering Materials, EarlyView.
The influence of a silane‐doped argon atmosphere on the chemical composition and temperature of a thermal nontransferring argon plasma is investigated using optical emission spectroscopy. As a result of the high amount of free electrons resulting from the stepwise ionization and dissociation of the silane molecule, even a silane addition of 0.01 vol ...
Lena Kreie, David Kramer, Thomas Scheithauer, Hans Jürgen Maier, Thomas Hassel   +4 more
wiley   +1 more source

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Bioanalytical Detection of Steroid Abuse in Sports Based on the Androgenic Activity Measurement

Chemosensors, 2021
The anabolic androgenic steroids (AAS) are the most frequently consumed performance enhancing drugs (PED) in sports. In the anti-doping field, the detection of AAS is carried out by the analysis of the athlete’s urine using methodologies based on liquid ...
Pilar Martín-Escudero, Jesus A. Muñoz-Guerra, Soledad Vargas García-Tenorio, Ester Serrano-Garde, Ana Belén Soldevilla-Navarro, Nuria Cortes-Carrillo, Mercedes Galindo-Canales, Nayade del Prado, Manuel Fuentes-Ferrer, Cristina Fernández-Pérez, Peter Alexander Behnisch, Abraham Brouwer   +11 more
doaj   +1 more source

Oxide‐Free Titanium Coatings by Wire Arc Spraying in a Silane‐Doped Inert Atmosphere

Advanced Engineering Materials, EarlyView.
A silane‐doped argon atmosphere enables the production of oxide‐free titanium coatings via twin‐wire arc spraying at ambient pressure. This innovative approach eliminates residual oxygen, creating process conditions that prevent oxidation and nitride formation.
Manuel Rodriguez Diaz, Maik Szafarska, René Gustus, Kai Möhwald, Hans Jürgen Maier   +4 more
wiley   +1 more source

Investigation of social variables associated with the use of doping among Armenian athletes

Спортивная медицина: наука и практика, 2020
To improve the effectiveness of the fight against doping, it is necessary to assess the areas of risk of doping in various sports disciplines. Objective: to conduct a survey of Armenian athletes, to assess the impact of social variables on their attitude
A. Hovhannisyan, A. Sahakyan, G. Jalleh, R. Donovan   +3 more
doaj   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

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

Precipitating or prohibiting factor: Coaches’ perceptions of their role and actions in anti-doping [PDF]

, 2017
Coaches are frequently cited as potentially precipitating or preventing athletes’ engagement in doping. However, little is known about coaches’ perspectives.
Rhiannon Morris, Justine B Allen, Dimeo, Paul, Robinson, Leigh, Morris, Rhiannon, Paul Dimeo, Allen, Justine, Leigh Robinson   +7 more
core   +1 more source

Removing Oxide Layers and Retaining Oxide‐Free Steel Surfaces by Polishing in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this study, the efficacy of wet mechanical polishing under an oxygen‐free atmosphere for deoxidation and the retention of an oxide‐free steel surface are elucidated using X‐ray photoelectron spectroscopy. The methodology proved successful; however, the results were highly dependent on the preparation of the solvents used to clean the samples after ...
Friedrich Bürger, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +2 more
wiley   +1 more source

Olympic Games

Deutsche Zeitschrift für Sportmedizin, 2021
Unethical behaviors in sport are a matter of global concern. The current surge in reports on abuse of athletes across sports and all over the world is reminiscent of the doping scandals in the 1980s and 1990s that made many believe that doping was ...
Tuakli-Wosornu YA, Moses EC, Amick M, Grimm K   +3 more
doaj   +1 more source