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Azamethiphos (AZA) is an insecticide and neurotoxic agent that causes the inhibition of acetylcholinesterase (AChE). AChE is a vital enzyme for neurotransmission because it metabolizes acetylcholine neurotransmitter at the synaptic cleft and terminates synaptic transmission. It is worth mentioning that organophosphates and carbamates inhibit AChE. These AChE inhibitors bind to the active site of the enzyme and inactivate it, leading to paralysis and death. Herein, for the first time, we develop a sensitive, low-cost, and rapid electrogenerated chemiluminescence (ECL) system for the detection of AZA. The designed ECL sensor was applied for the highly sensitive detection of AZA with a wide dynamic range (from 0.1 μM to 1000 μM) and low detection limit of 0.07 μM (S/N = 3). The practical utility of the sensor demonstrates high recoveries (96-102%) in real samples of lake water and wastewater.
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http://dx.doi.org/10.3390/s22072519 | DOI Listing |
Phys Rev Lett
August 2025
The Johns Hopkins University, William H. Miller III Department of Physics and Astronomy, Baltimore, Maryland 21218, USA.
We investigate the inspiral of a high mass-ratio black hole binary located in the nucleus of a galaxy, where the primary central black hole is surrounded by a dense dark matter spike formed through accretion during the black hole growth phase. Within this spike, dark matter undergoes strong self-annihilation, producing a compact source of γ-ray radiation that is highly sensitive to spike density, while the binary emits gravitational waves at frequencies detectable by LISA. As the inspiraling binary interacts with the surrounding dark matter particles, it alters the density of the spike, thereby influencing the γ-ray flux from dark matter annihilation.
View Article and Find Full Text PDFPLoS One
September 2025
Department of Anatomy and Physiology, The University of Melbourne, Parkville, Victoria, Australia.
Food intake is a key regulator of the digestive system function; however, little is known about organ- and sex-specific differences in food-driven regulation. We placed male and female C57Bl/6 mice on time-restricted feeding (TRF), limiting access to food to an 8-hour window. Food was added either at dark (ZT12) or light (ZT0) onset for 14 days.
View Article and Find Full Text PDFJ Phys Chem Lett
September 2025
Hebei Key Laboratory of Optic-Electronic Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, P. R. China.
A highly sensitive, self-powered position-sensitive detector (PSD) based on a PEDOT:PSS/Si heterojunction is prepared. Band structure optimization via FS-300 additive doping significantly enhances the built-in electric field, achieving a maximum open-circuit voltage of 0.45 V (0.
View Article and Find Full Text PDFInt J Audiol
September 2025
Institute of Hearing Technology and Audiology, Jade University of Applied Sciences, Oldenburg, Germany.
Objective: Determination of monaural and binaural speech-recognition curves for the Freiburg monosyllabic speech test (FMST) in quiet to update and supplement existing normative data.
Design: Monaural and binaural speech-recognition tests were performed in free field at five speech levels in two anechoic test rooms at two sites (Lübeck and Oldenburg, Germany). For the monaural tests, one ear was occluded with a foam earplug.
ACS Sens
September 2025
Department of Electrical and Computer Engineering, Inha University, Incheon 22212, Republic of Korea.
Diabetes mellitus (DM) is a chronic metabolic disorder characterized by persistent hyperglycemia with multiple clinical manifestations and complications, such as cardiovascular disease, kidney dysfunction, retinal impairment, and peripheral neuropathy. Continuous and minimally invasive glucose monitoring is essential for effective DM management. Microneedles (MNs)-based sensing platforms offer a promising solution; however, conventional polymeric MNs suffer from limited electrochemical sensitivity due to their insufficient electroactive surface area and inefficient loading of catalytic and enzymatic components.
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