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Underwater paddling kinematics and hydrodynamics in a surface swimming duck versus a diving duck.
J Exp Biol
March 2025
School of Zoology, Faculty of Life Sciences, Tel Aviv University, Tel Aviv 6997801, Israel.
Some duck species mostly swim on the water surface while others frequently dive underwater. We compared the paddling kinematics of mandarin ducks (Axis galericulata) that feed on the surface and diving ferruginous pochards (Aythya nyroca) that feed underwater. Both species were trained to perform the same horizontal, submerged swimming at 1m depth in a controlled set-up.
View Article and Find Full Text PDFSpermidine alleviates copper-induced oxidative stress, inflammation and cuproptosis in the liver.
FASEB J
March 2025
State Key Laboratory of Swine and Poultry Breeding Industry, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu, P. R. China.
Copper exposure poses potential detrimental effects on both public and ecosystem health. Spermidine, an antioxidant, has shown promise in reducing oxidative stress and inflammation within the liver. However, its specific role in mitigating copper-induced hepatic cuproptosis and disturbances in copper metabolism remains unexplored.
View Article and Find Full Text PDFUpdated Insights Into the Mechanism of Salt-Induced Aggregation-Based Single-Molecule Surface-Enhanced Raman Spectroscopy.
Adv Sci (Weinh)
March 2025
Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.
Since its discovery in 1997, the single molecule surface-enhanced Raman spectroscopy (SM-SERS) has attracted wide interest owing to its enormous potential in many fields. However, the commercialized applications of SM-SERS are still limited by the lack of a clear understanding of the relevant mechanism in the famous SM-SERS experiments. In this study, a salt-gradient model is proposed to deeply investigate the physical nature and update insights into the morphological, structural, and component evolution processes of Ag NPs from dispersed nanostructures to aggregation states in the salt-induced aggregation SERS strategy.
View Article and Find Full Text PDFEffects of tea polyphenols disinfectant on microbial communities and potential pathogenic bacteria in water.
Environ Technol
March 2025
Key Laboratory of Urban Stormwater System and Water Environment, Ministry of Education, Beijing University of Civil Engineering and Architecture, Beijing, People's Republic of China.
The structural and abundance changes in water disinfected by tea polyphenols were investigated in high-abundance microbial communities (HAMC), medium-abundance microbial communities (MAMC), and low-abundance microbial communities (LAMC), also included the interactions within and between these communities. The antibacterial effect of tea polyphenols was observed at concentrations of 20-300 mg/L. If the tea polyphenols concentration is greater than or equal to 200 mg/L, it can continue to inhibit the growth of bacteria, and keep the total number of bacteria in 48 hours no more than100 CFU/ml, and this reflected the continuity of tea polyphenols disinfectant in the pipe network.
View Article and Find Full Text PDFFlexible Patterned Fuel Cell Patches Stimulate Nerve and Myocardium Restoration.
Adv Mater
March 2025
College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China.
The distribution of electrical potentials and current in exogenous electrostimulation has significant impacts on its effectiveness in promoting tissue repair. However, there is still a lack of a flexible, implantable power source capable of generating customizable patterned electric fields for in situ electrostimulation(electrical stimulation). Herein, this study reports a fuel cell patch (FCP) that can provide in situ electrostimulation and a hypoxic microenvironment to promote tissue repair synergistically.
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