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Insights into the electroactive impact of magnetic nanostructures in PVDF composites small-angle neutron scattering.
Nanoscale
January 2025
Physics Centre of Minho and Porto Universities (CF-UM-UP) and LaPMET - Laboratory of Physics for Materials and Emergent Technologies, University of Minho, 4710-057 Braga, Portugal.
Poly(vinylidene fluoride) (PVDF) is technologically relevant due to its thermal stability; chemical, mechanical and radiation resistance; transparency; biocompatibility; and ease of processing. Several of those applications are related to its high electroactivity, for which the β-phase of the polymer is its most renowned protagonist. In this context, extensive research has been conducted on the crystallization of PVDF in the β-phase, when processed from melt and from solution.
View Article and Find Full Text PDFThe biomechanical implications of lacunar and perilacunar microarchitecture on microdamage accumulation in cortical bone.
Acta Bioeng Biomech
June 2024
3School of Mechanical Engineering, Yanshan University, Hebei, China.
: This study aimed to explore how the microarchitectural features of lacunae and perilacunar zones impact the biomechanics of microdamage accumulation in cortical bone, crucial for understanding bone disorders' pathogenesis and developing preventive measures. : Utilizing the phase field finite element method, the study analyzed three bone unit models with varying microarchitecture: one without lacunae, one with lacunae and one including perilacunar zones, to assess their effects on cortical bone's biomechanical properties. : The presence of lacunae was found to increase microcrack initiation risk, acting as nucleation points and accelerating microcrack propagation.
View Article and Find Full Text PDFVitamin B2 Operates by Dual Thermodynamic and Kinetic Mechanisms to Selectively Tailor Urate Crystallization.
J Am Chem Soc
January 2025
Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204, United States.
Here we demonstrate how a biologically relevant molecule, riboflavin (vitamin B2), operates by a dual mode of action to effectively control crystallization of ammonium urate (NHHU), which is associated with cetacean kidney stones. In situ microfluidics and atomic force microscopy experiments confirm a strong interaction between riboflavin and NHHU crystal surfaces that substantially inhibits layer nucleation and spreading by kinetic mechanisms of step pinning and kink blocking. Riboflavin does not alter the distribution of tautomeric urate isomers, but its adsorption on NHHU crystal surfaces does interfere with the effects of minor urate tautomer by limiting its ability to induce NHHU crystal defects while also suppressing NHHU nucleation and inhibiting crystal growth by 80% at an uncharacteristically low modifier concentration.
View Article and Find Full Text PDFSolid-State Precipitation of Silver Nanoparticles Nucleated during Al Anodizing: Mechanism and Antibacterial Properties.
ACS Appl Bio Mater
January 2025
Laboratório de Processos Eletroquímicos e Corrosão-ELETROCORR, Departamento de Metalurgia, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves 9500, 91501-970 Porto Alegre, Brazil.
This study presents an innovative approach to creating antibacterial aluminum surfaces by combining the antibacterial properties of silver nanoparticles (Ag NPs) with the nanoarchitecture of anodized aluminum oxide in one step. An Al-Ag alloy containing 10 wt % Ag was synthesized and anodized in 0.3 M oxalic acid.
View Article and Find Full Text PDFSynergistic inhibition of colorectal cancer progression by silencing Aurora A and the targeting protein for Xklp2.
World J Gastrointest Surg
January 2025
Department of Colorectal Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Traditional Chinese Medicine), Hangzhou 310006, Zhejiang Province, China.
Background: Unraveling the pathogenesis of colorectal cancer (CRC) can aid in developing prevention and treatment strategies. Aurora kinase A (AURKA) is a key participant in mitotic control and interacts with its co-activator, the targeting protein for Xklp2 (TPX2) microtubule nucleation factor. AURKA is associated with poor clinical outcomes and high risks of CRC recurrence.
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