Machine learning calibration of biosensors for microcystin toxin monitoring in freshwater
Peer-Reviewed Publication
Updates every hour. Last Updated: 27-Oct-2026 03:16 ET (27-Oct-2026 07:16 GMT/UTC)
Detecting microcystin-leucine-arginine (MC-LR) in freshwater is increasingly important as harmful algal blooms intensify, but biosensor readings are affected by changing water conditions. Researchers at Hanbat National University and the University of Central Florida developed a machine learning-based calibration framework for biosensors using water quality data. The model accurately predicted MC-LR levels while reducing the need for repeated recalibration, enabling more reliable on-site monitoring.
Stars like our Sun are formed from the gravitational collapse of prestellar cores. However, prestellar cores have strong magnetic fields that need to be weakened for gravitational collapse to take over allowing a star to form. By observing two tracer molecules in a prestellar core, researchers have observed ambipolar diffusion, a velocity discrepancy between ions and neutral particles. This process weakens the magnetic field of the core, which eventually collapses to form a protostar.
The development of high‐energy‐density sodium‐ion batteries places stringent requirements on cathode materials to simultaneously achieve high operating voltages, rapid Na+ ions transport, and long‐term structural and interfacial stability. Polyanionic NASICON‐type frameworks have emerged as a compelling cathode platform due to their robust three‐dimensional Na+ ions diffusion networks, strong inductive effects, and excellent thermal stability. Within this materials family, fluorophosphate NASICON cathodes offer elevated redox potentials, while targeted anion chemistry modulation provides an effective strategy to tune electronic structure, ion migration, and interfacial reactivity. Representative vanadium‐based fluorophosphate cathodes, Na3V2(PO4)2F3 (NVPF) and Na3V2O2(PO4)2F (NVOPF), exhibit closely related crystal frameworks yet display distinct sodium storage behavior and degradation characteristics under high‐voltage operation. In NVOPF, partial substitution of F− by O2− enhances electronic conductivity and Na+ ions transport kinetics, while NVPF maintains a higher redox potential associated with the V3+/V4+ couple. This review critically compares NVPF‐ and NVOPF‐based cathodes in terms of crystal structure, sodium storage mechanism, synthesis and modification strategies, and high‐voltage cathode/electrolyte interfacial stability. By correlating structural chemistry with electrochemical and interfacial evolution, this work provides general insights and design guidelines for high‐voltage NASICON‐type cathodes in sodium‐ion batteries.
Filter-feeding fin whales expel colossal volumes of water through baleen strainers in their mouths when dining on krill, but new research published in Journal of Experimental Biology shows that krill clogging the baleen could be a problem for the massive mammals, slowing water leaving their mouths to a 0.02m/s dribble unless they can keep the baleen clear. Then the whales can expel the water in just 31s to keep diving for dinner.
From ocean pollution to carbon emissions, mixed plastics are an environmental headache. Japanese researchers have now developed a catalyst that selectively degrades polyurethane in mixed plastic waste while leaving coexisting polyester and nylon intact. Using an iridium-based catalyst with a phenolate salt additive and hydrogen gas, the method was successfully tested on blended textiles and end-of-life car seats, offering a practical route to recycling complex plastic combinations long considered too difficult to separate.