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Investigation into Alzheimer's-related amyloid-β conformational transformations and stability influenced by green iron oxide nanoparticles (GIONP).
Int J Biol Macromol
January 2025
Biophysics Department, Faculty of Science, Cairo University, 12613 Giza, Egypt. Electronic address:
Alzheimer's disease (AD) is popularly believed to be triggered by the aggregation of amyloid beta 1-42 (Aβ - 42) peptides, eventually leading to neurodegeneration. Our study delves into the influential role played by Green Iron Oxide Nanoparticles (GIONP). GIONP are typically synthesized using a green chemistry approach, imposing curcumin as a biocompatible reducing and capping agent, leveraging its inherent antioxidant, anti-inflammatory, and neuroprotective attributes.
View Article and Find Full Text PDFElucidating early proton irradiation effects in metal halide perovskites via photoluminescence spectroscopy.
iScience
January 2025
Department of Physics, University of California, Merced, Merced, CA, USA.
Metal halide perovskite (MHP) solar cells are promising aerospace power sources given their potential as inexpensive, lightweight, and resilient solar electricity generators. Herein, the intrinsic radiation tolerance of unencapsulated methylammonium lead iodide/chloride (CHNHPbICl) films was isolated. Spatially resolved photoluminescence (PL) spectroscopy and confocal microscopy revealed the fundamental defect physics through optical changes as films were irradiated with 4.
View Article and Find Full Text PDFSelective production of olefins from methanol over a heteroatomic SAPO-34 zeolite.
Sci Bull (Beijing)
January 2025
Department of Chemistry, University of Manchester, Manchester, M13 9PL, UK; College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences, Peking University, Beijing 100871, China. Electronic address:
The methanol-to-olefins (MTO) process has the potential to bridge future gaps in the supply of sustainable lower olefins. Promoting the selectivity of propylene and ethylene and revealing the catalytic role of active sites are challenging goals in MTO reactions. Here, we report a novel heteroatomic silicoaluminophosphate (SAPO) zeolite, SAPO-34-Ta, which incorporates active tantalum(V) sites within the framework to afford an optimal distribution of acidity.
View Article and Find Full Text PDFHypothesis: The oil phase controls the persistence length and aqueous channel diameter of reverse wormlike micelles (RWLMs), specifically by tuning the cohesive energy density of alkanes.
Experiments: We explore the influence of alkanes with varying chain lengths on the rheological properties, structural parameters, and morphology of RWLMs. To establish a link between the solvent characteristics and the structure of RWLMs, we employ a diverse set of complementary techniques, including rheological analysis, small-angle X-ray scattering (SAXS), Fourier-transform infrared (FT-IR) spectroscopy, and cryogenic transmission electron microscopy (cryo-TEM).
A complementary experimental and computational study on methanol adsorption isotherms of H-ZSM-5.
Phys Chem Chem Phys
January 2025
UK Catalysis Hub, Research Complex at Harwell, Science and Technology Facilities Council, Rutherford Appleton Laboratory, OX11 0FA, UK.
Methanol adsorption isotherms of fresh f-ZSM-5 and steamed s-ZSM-5 (Si/Al ≈ 40) are investigated experimentally at room temperature under equilibrium and by grand canonical Monte Carlo (GCMC) simulations with the aim of understanding the adsorption capacity, geometry and sites as a function of steam treatment (at 573 K for 24 h). Methanol adsorption energies calculated by GCMC are complemented by density functional theory (DFT) employing both periodic and quantum mechanics/molecular mechanics (QM/MM) techniques. Physical and textural properties of f-ZSM-5 and s-ZSM-5 are characterised by diffuse reflectance infrared Fourier transformed spectroscopy (DRIFTS) and N-physisorption, which form a basis to construct models for f-ZSM-5 and s-ZSM-5 to simulate methanol adsorption isotherms by GCMC.
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