Characterization of the ceramic coating formed on 2024 al alloy by scanning plasma electrolytic oxidation.

This study investigates the characteristics and performance of ceramic coatings fabricated on 2024 aluminum alloy surfaces using the scanning plasma electrolytic oxidation (SPEO) process. The effects of various scanning parameters, including discharge gap, scanning frequency, scanning speed, and overlap rate, on coating properties were systematically examined. The coatings were characterized using potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), microhardness testing, roughness analysis, and thickness measurement.

Polysaccharides from Polygonatum kingianum Collett & Hemsl ameliorated fatigue by regulating NRF2/HO-1/NQO1 and AMPK/PGC-1α/TFAM signaling pathways, and gut microbiota.

Polygonatum kingianum Coll & Hemsl is an important Chinese medicine used for enhancing physical function and anti-fatigue, and polysaccharides (PKPs) are considered as the main bioactive components. However, the mechanisms through which PKPs exert their anti-fatigue effects are not fully understood. This study aimed more comprehensively to explore the anti-fatigue mechanisms of PKPs, focusing on metabolism, protein expression, and gut flora, by using exhaustive swimming experiments in mice.