来源：ACS PublicationsPyrroloquinoline quinone (PQQ)-binding proteins are found in diverse species and play key roles in the central metabolism of many methylotrophic bacteria, acting as redox-active cofactors in their alcohol dehydrogenase (ADH) enzymes. These enzymes also require a Lewis acidic metal ion to activate PQQ, and the 2011 discovery of lanthanide (Ln3+)-dependent ADH enzymes sparked a surge of interest in understanding their functional properties. However, key questions remain regarding the mechanism, metal ion-dependence, and electron transport processes of these enzymes. We report ...
Release time:
2025
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10
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来源：ACS PublicationsRare-earth-organic frameworks (REOFs) have been extensively investigated as promising adsorbents for radioactive nuclides, owing to the diverse coordination environments and robust bonding structures of rare-earth ions and the tunable large-pore architectures of frameworks. Herein, a yttrium-based REOF (Y-NH2–BTB) featuring microporous and hierarchical channels (pore volume of 0.2625 cm3 g–1) is reported as an efficient platform for capturing radioactive iodine vapor─a highly radiotoxic fission product released during nuclear fuel reprocessing. A maximum adsorption capacity ...
Release time:
2025
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Plasma Image-Calibrated Double-Pulse Laser-Induced Breakdown Spectroscopy for High-Precision Quantification of Light Rare Earth Elements in Geological Matrix 来源：ACS PublicationsAs critical strategic resources for modern high-tech industries, accurate quantitative analysis of light rare earth elements (LREEs) holds significant importance in resource exploration, new energy materials research, and ecological monitoring. Traditional laser-induced breakdown spectroscopy (LIBS) suffers from matrix effects and spectral interference, posing challenges to achieve high quantitative accuracy in low-conc...
Release time:
2025
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来源：ACS PublicationsSingle-mode lasers are of great importance due to their superior stability, low noise characteristic, high beam quality, and high spectral purity. Here, we employ thulium (Tm) and erbium (Er) codoped microcavities to demonstrate a mode suppression strategy in which Tm acts as a direct loss modificator for Er, suppressing low-gain competing modes by bringing them much higher absorption losses and then achieving lasing from a single high-gain mode. As a result, Er–Tm codoped multimode microcavities exhibit intrinsic single-mode lasing in the telecom band with a side-mode suppr...
Release time:
2025
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