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Field-particle energy transfer during chorus emissions in space.
Nature
January 2025
Southwest Research Institute, San Antonio, TX, USA.
Chorus waves are some of the strongest electromagnetic emissions naturally occurring in space and can cause radiation that is hazardous to humans and satellites. Although chorus waves have attracted extreme interest and been intensively studied for decades, their generation and evolution remain highly debated. Here, in contrast to the conventional expectation that chorus waves are governed by planetary magnetic dipolar fields, we report observations of repetitive, rising-tone chorus waves in the terrestrial neutral sheet, where the effects of the magnetic dipole are absent.
View Article and Find Full Text PDFLocal polar order controls mechanical stress and triggers layer formation in Myxococcus xanthus colonies.
Nat Commun
January 2025
Joseph Henry Laboratories of Physics, Princeton University, Princeton, NJ, USA.
Colonies of the social bacterium Myxococcus xanthus go through a morphological transition from a thin colony of cells to three-dimensional droplet-like fruiting bodies as a strategy to survive starvation. The biological pathways that control the decision to form a fruiting body have been studied extensively. However, the mechanical events that trigger the creation of multiple cell layers and give rise to droplet formation remain poorly understood.
View Article and Find Full Text PDFt2 Occupancy as an Effective and Predictive Descriptor for the Design of High-Performance Spinel Oxide Peroxidase-like Nanozymes.
Angew Chem Int Ed Engl
January 2025
Nanjing University, Biomedical Engineering, 22 Hankou Rd, 210093, Nanjing, CHINA.
Nanozymes are next generation of enzyme mimics. Due to the lack of activity descriptors, most nanozymes were discovered through trial-and-error strategies or by accident. While eg occupancy in an octahedral crystal field was proven as an effective descriptor, the t2 in a tetrahedral crystal field has rarely been explored.
View Article and Find Full Text PDFThe carbon dioxide (CO) capture and utilization strategy has emerged as an innovative and multifaceted approach to counteract carbon emissions. In this study, a highly porous muffin polyhedral barium (Ba) ̵ organic framework (BaTATB; HTATB = 4,4',4″--triazine-2,4,6-triyl-tribenzoic acid) was synthesized solvothermally. The three-dimensional honeycomb pore architectures were densely populated with Lewis acidic Ba(II) metal sites and basic nitrogen-rich triazines.
View Article and Find Full Text PDFScoliosis in adult Type 1 Chiari malformation with syringomyelia patients: from pathogenesis to treatment.
Am J Transl Res
December 2024
Department of Orthopaedics, Beilun District People's Hospital, Beilun Branch of The First Affiliated Hospital, Zhejiang University Ningbo, Zhejiang, China.
The pathogenesis of type I Chiari malformation (CIM) is complex and remains unclear. The theory of posterior cranial fossa incompatibility has gained widespread acceptance in recent years. In the patients with CIM combined with syringomyelia, scoliosis is a common occurrence, with severe cases often leading to complications that necessitate surgical intervention.
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