Results 31 to 40 of about 19,843 (254)

Trends in dietary supplement use among athletes selected for doping controls

Frontiers in Nutrition, 2023
BackgroundDietary supplements (DS) may be beneficial for athletes in certain situations, whereas incorrect or excessive use may impair performance, pose a risk to the athlete's health and cause positive doping tests by containing prohibited substances ...
Fredrik Lauritzen, Astrid Gjelstad, Astrid Gjelstad   +2 more
doaj   +1 more source

From mat to sand: a comparative injury surveillance study of Olympic and Beach Wrestling at the 2025 World championships

Injury Epidemiology
Background Wrestling is associated with a substantial risk of injury; however, comparative injury epidemiology between Olympic Wrestling (OW) and Beach Wrestling (BW) remains limited, constraining evidence-informed injury-prevention strategies across ...
Szabolcs Molnár, Dorsaf Metahni, Saam Falahati, Francisco Lee, Radivoj Filipov, Babak Shadgan   +5 more
doaj   +1 more source

Ferroelectricity in Antiferromagnetic Wurtzite Nitrides

Advanced Functional Materials, EarlyView.
We establish MnSiN2${\rm MnSiN}_2$ and MnGeN2${\rm MnGeN}_2$ as aristotypes of a new multiferroic wurtzite family that simultaneously exhibits ferroelectricity and antiferromagnetism with altermagnetic spin splitting. By strategically substituting alkaline‐earth metals, we predict new materials with coexisting switchable polarization, spin texture, and
Steven M. Baksa, Lin‐Ding Yuan, Stephen D. Wilson, James M. Rondinelli   +3 more
wiley   +1 more source

Strain‐Programmable Luminescent Adhesive Patch With Tartrazine‐Mediated Optical Skin Clearing for Photochemical Tissue Bonding

Advanced Functional Materials, EarlyView.
We propose a suture‐complementary approach that integrates optical skin clearing with a strain‐programmable luminescent adhesive patch. Hyaluronic acid promotes transdermal delivery of tartrazine to improve optical clearing and stabilizes its interaction with a photosensitizer. Optical clearing increases the penetration depth of visible light into skin,
Seong‐Jong Kim, Kyungjoo Jo, Kwanghyeon Park, Jun Hee Kim, Jong Hyeong Cho, Inhoo Choi, Sei Kwang Hahn   +6 more
wiley   +1 more source

Evaluation of performance-enhancing drugs seized by Israeli enforcement agencies 2012–2017: implications for policy and regulatory change

Israel Journal of Health Policy Research, 2020
Background Illicit performance-enhancing substances are used mostly by athletes to enhance performance in sports, and by bodybuilders to gain muscle and body mass.
Hagit Bonny-Noach, Ronny Berkovitz, Barak Shapira   +2 more
doaj   +1 more source

Robust Electrocaloric Performance Enabled by Highly‐Polar Frustrated Nanodomains in NaNbO3‐Based Ferrodistortive Relaxor

Advanced Functional Materials, EarlyView.
P4bm framework in NaNbO3‐Ba(Ti, Hf)O3 ferrodistortive relaxor entails short‐range and highly‐polar ferrodistortive orders. The abundant highly‐polar orders facilitate to increase entropy change, and robust octahedral oxygen tilt enables to impede thermal perturbations.
Feng Li, Changshun Dai, He Qi, Jiecheng Liu, Xiaoming Shi, Heng Zhou, Qiong Yang, Mingsheng Long, Lei Shan, Chunchang Wang, Jianli Wang, Zhenxiang Cheng   +11 more
wiley   +1 more source

The structural validity and latent profile characteristics of the Abbreviated Profile of Mood States among Chinese athletes

BMC Psychiatry
Background This study examines the structural validity of the Chinese version of the Abbreviated Profile of Mood States (POMS) among Chinese athletes and analyzes potential profiles to provide evidence for its effective use and recommendations for its ...
Chenhao Tan, Jun Yin, Yan An, Jinhao Wang, Jun Qiu   +4 more
doaj   +1 more source

Development of QuEChERS Method for the Determination of Polycyclic Aromatic Hydrocarbons in Smoked Meat Products Using GC-MS from Qatar

Journal of Analytical Methods in Chemistry, 2018
A simple and fast method for the determination of PAHs in smoked meat samples was described. The QuEChERS (Z-Sep) procedure was used for sample preparation. Gas chromatograph-mass spectrometer with electron ionization (EI) was used to separate and detect
Hussain Al-Thaiban, Nada Al-Tamimi, Murad Helaleh   +2 more
doaj   +1 more source

Omnipolar Magnetic Field Detection by Superlattice‐Based Hall Sensor

Advanced Functional Materials, EarlyView.
Magnetic‐field‐induced electronic switching is demonstrated in unit‐cell‐engineered La0.7Sr0.3MnO3–BiFeO3 superlattices. Distinct substrate terminations modify magnetic and transport properties. Hall resistance measurements show omnipolar, hysteretic anomalous Hall switching above the Curie temperature, arising from Fe─Mn interfacial exchange, enabling
Mark Huijben, Nicolas Gauquelin, Arno Annys, Zhaoliang Liao, Jo Verbeeck, Guus Rijnders, Gertjan Koster   +6 more
wiley   +1 more source

A comparative study of Chinese women 3 × 3 basketball players exercise load in Tokyo Olympic preparation cycle

Frontiers in Physiology, 2023
Objective: The aim of this study was to compare the variances in-game loads exhibited by Chinese women’s 3 × 3 basketball team across different stages of the preparation cycle for the Tokyo Olympic Games, and to summarize the fundamental regulations ...
Zhe Wang, Guohuan Cao, Jiamin Xu, Jun Qiu, Ruoyu Yang   +4 more
doaj   +1 more source