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MicroSphere 3D Structures Delay Tissue Senescence through Mechanotransduction.
ACS Nano
January 2025
Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899 Pinghai Road, Soochow, Jiangsu 215000, China.
The extracellular matrix (ECM) stores signaling molecules and facilitates mechanical and biochemical signaling in cells. However, the influence of biomimetic "rejuvenation" ECM structures on aging- and degeneration-related cellular activities and tissue repair is not well understood. We combined physical extrusion and precise "on-off" alternating cross-linking methods to create anisotropic biomaterial microgels (MicroRod and MicroSphere) and explored how they regulate the cell activities of the nucleus pulposus (NP) and their potential antidegenerative effects on intervertebral discs.
View Article and Find Full Text PDFSmall-angle neutron scattering differentiates molecular-level structural models of nanoparticle interfaces.
Nanoscale
January 2025
Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
The highly anisotropic and nonadditive nature of nanoparticle surfaces restricts their characterization by limited types of techniques that can reach atomic or molecular resolution. While small-angle neutron scattering (SANS) is a unique tool for analyzing complex systems, it has been traditionally considered a low-resolution method due to its limited scattering vector range and wide wavelength spread. In this article, we present a novel perspective on SANS by showcasing its exceptional capability to provide molecular-level insights into nanoparticle interfaces.
View Article and Find Full Text PDFBenchmark of Density Functional Theory in the Prediction of C Chemical Shielding Anisotropies for Anisotropic Nuclear Magnetic Resonance-Based Structural Elucidation.
J Chem Theory Comput
January 2025
Research Unit of Structural Chemistry & Computational Biophysics, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin 13125, Germany.
Density functional theory (DFT) calculations have emerged as a powerful theoretical toolbox for interpreting and analyzing the experimental nuclear magnetic resonance (NMR) spectra of chemical compounds. While DFT has been extensively used and benchmarked for isotropic NMR observables, the evaluation of the full chemical shielding tensor, which is necessary for interpreting residual chemical shift anisotropy (RCSA), has received much less attention, despite its recent applications in the structural elucidation of organic molecules. In this study, we present a comprehensive benchmark of carbon shielding anisotropies based on coupled cluster reference tensors taken from the NS372 benchmark data set.
View Article and Find Full Text PDFBiomaterial scaffold stiffness influences the foreign body reaction, tissue stiffness, angiogenesis and neuroregeneration in spinal cord injury.
Bioact Mater
April 2025
Laboratory of Experimental Neuroregeneration, Spinal Cord Injury Center, Heidelberg University Hospital, 69118, Heidelberg, Germany.
Biomaterial scaffold engineering presents great potential in promoting axonal regrowth after spinal cord injury (SCI), yet persistent challenges remain, including the surrounding host foreign body reaction and improper host-implant integration. Recent advances in mechanobiology spark interest in optimizing the mechanical properties of biomaterial scaffolds to alleviate the foreign body reaction and facilitate seamless integration. The impact of scaffold stiffness on injured spinal cords has not been thoroughly investigated.
View Article and Find Full Text PDFA Series of AnO Complexes (An = U, Np, Pu) with NO-Donating Schiff-Base Ligands: Systematic Trends in the Molecular Structures and Redox Behavior.
Inorg Chem
January 2025
Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, 2-12-1 N1-32, O-okayama, Meguro-ku, Tokyo 152-8550, Japan.
Article Synopsis
- Actinide elements like U, Np, and Pu often form actinyl ions (AnO) in their +V and +VI oxidation states, which are significant for understanding environmental behavior and nuclear processes.
- Research on [AnO(saldien)] complexes shows that their molecular structures share similarities, with some variations caused by actinide contraction, while their redox potentials increase from U to Np and then decrease to Pu, indicating distinct electronic configurations.
- The study's findings, supported by DFT-based calculations, enhance our understanding of actinide oxidation states, which is crucial for various applications, including nuclear fuel management and advancements in spintronics.
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