A recent study published in National Science Review has revealed new insights into the global riverine carbon cycle. This study constructed global maps of riverine dissolved organic carbon (DOC) concentration, along with its radiocarbon (Δ¹⁴C) and stable carbon isotope (δ¹³C) signatures, based on a comprehensive global database and machine learning approaches. It systematically elucidates the sources, spatial distribution, and age characteristics of riverine DOC, quantifies the contributions of different endmembers, and reveals how its age and origin are dynamically regulated by climate conditions, hydrological processes, and soil properties. The results show that soil carbon residence time plays a key role in determining the age of dissolved organic matter transported by global rivers. In particular, warming-induced permafrost thaw is accelerating the release of long-preserved “old carbon” into river systems. Once mobilized, this aged carbon can be transported downstream and participate in aquatic biogeochemical processes, potentially enhancing carbon cycle feedbacks to the climate system.

To address the long-standing challenges of difficult mass-production and low phase purity in high-entropy sodium vanadium fluorophosphates (HE-NVPF), this study developed a microfluidic system integrated with in-situ Raman spectroscopy. This setup allows for the high-throughput optimization of reaction conditions, achieving an iteration efficiency 400 times higher than traditional methods. Based on these insights, the author developed a microfluidic-assisted spray drying technique, enabling the kilogram-scale production of various HE-NVPF cathode materials . The resulting cathodes demonstrate record-breaking rate performance in sodium-ion batteries, proving the universal potential of this microfluidic synthesis platform.

Boundary states in topological states of matter are determined by bulk topological invariants. The conventional bulk–boundary correspondence typically maps a single invariant to a specific boundary mode, which complicates the description of systems hosting multiple coexisting topological phases. Now, writing in the journal National Science Review, researchers proposed a unified characterization of strong, weak, and higher-order topological boundary states in two-dimensional Floquet systems using three complementary one-dimensional winding numbers, offering new insights into the prediction and manipulation of complex topological phases.

This study has revealed the pro-apoptotic effect of GADD45B in intestinal ischemia/reperfusion (I/R), explored its downstream pathways and targets, and further confirmed the crucial role and molecular mechanism of epigenetics in intestinal I/R, which is helpful for deepening the understanding of intestinal I/R injury and providing important theoretical basis and key targets for the treatment of I/R injury.

A new field evaluation identifies eight novel papaya hybrid lines with superior agronomic traits, early fruiting, and enhanced tolerance to Moroccan watermelon mosaic virus (MWMV), offering a sustainable solution to boost smallholder productivity in Kenya.

Current homogeneity testing has long relied on a planar “slice‑then‑measure” approach. Professor Sen Han’s team proposes a radial absolute measurement method for cylindrical surfaces. This method requires no slicing, is low‑cost, and enables direct non‑destructive measurement of refractive index distribution, offering an efficient pre‑screening tool for semiconductors, LiDAR, medical imaging, and more.

A new commentary outlines China’s ambitious national park strategy, which balances strict ecological protection, public welfare, and sustainable development to conserve key ecosystems and prioritize global biodiversity goals.