Arsenic contamination in rice paddies is a stubborn and dangerous threat to global food safety. Heavy metals linger in the mud, stressing the crops and eventually making their way into the human diet. While engineers frequently test expensive chemical treatments to clean up these sites, a fresh ecological approach looks to a surprisingly common material for the cure: discarded pork bones.

A newly published paper in Carbon Research explores exactly what happens when agricultural lands are treated with micro- and nano-scale bone char (MNBC). Driven by corresponding author Chuanxin Ma at the Guangdong University of Technology, the investigation proves that adding just a small amount of this specially processed biochar triggers a massive biological revival in toxic soil.

This initiative draws on the deep ecological expertise housed at the Guangdong Basic Research Center of Excellence for Ecological Security and Green Development and the Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds. Rather than just trapping the arsenic, the researchers discovered that the bone char fundamentally alters how the soil microbiome behaves and survives under stress.

A research team led by Ke-Yin Ye and Yuqi Lin at Fuzhou University developed an electrochemically mediated dearomatization saturation strategy, successfully achieving chemo, regio, and stereoselective multifunctionalization reactions of pyridine. This strategy provides an efficient synthetic route for the one-step construction of complex three-dimensional piperidine skeletons with four convertible functional groups. Mechanistic studies show that cyanogen bromide generated in situ by electrochemical processes can initiate the dearomatization of pyridine, thereby generating a dihydropyridine intermediate. This intermediate, through intramolecular anodic carbon effects and CH···π interactions, synergistically regulates the stereochemical selectivity of the subsequent electrochemical ortho-bifunctionalization process, thus achieving highly selective transformation. The article was published as an open access Research Article in CCS Chemistry, the flagship journal of the Chinese Chemical Society.

MIT researchers discovered that dendrites, cracks that harm the performance of solid-state batteries, can grow at far lower stresses than previously understood. The findings reveal why developing stronger solid electrolytes alone hasn’t solved the dendrite problem; more chemically stable materials will be needed to finally fulfill the promise of these batteries.

Their mass is extremely low, but how light are neutrinos really? A collaboration comprising German and international research groups has optimized its experiments to determine the mass of these “ghost particles”. In doing so, they succeeded in further adjusting downward the upper limit on the neutrino mass scale that had previously been determined in similar experiments. As part of the “Electron Capture in Ho-163 Experiment” (ECHo), the researchers are using the isotope Holmium-163 (Ho-163), whose decay processes allow for conclusions on the neutrino mass. According to ECHo spokesperson Prof. Dr Loredana Gastaldo, a scientist at Heidelberg University’s Kirchhoff Institute for Physics, the current results verify that even larger-scale investigations will be feasible in future to get even closer to the mass of neutrinos and ultimately precisely determine it.

Solar energy is a promising source of green energy, yet conventional solar cells cannot fully utilize it due to efficiency limits in semiconductors. Researchers have now found a strategy to overcome this barrier with a new design strategy for exciton amplification. Using a molybdenum-based “spin-flip” emitter, they harvest multiplied excitons generated by singlet fission. The system achieves quantum yields of around 130%, surpassing the conventional 100% limit and opening possibilities for solar cells and LEDs.