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Investigating the factors contributing to the maintenance of high levels of warm season nocturnal ozone in a basin city.
Environ Pollut
January 2025
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, China. Electronic address:
In recent years, ozone (O) pollution in many Chinese cities has worsened. Several cities have also experienced incidents where nocturnal O concentrations did not decrease as expected, and instead remained at high levels (above 50 ppb). However, there have been few detailed studies on the causes of these events.
View Article and Find Full Text PDFSynthesis of chiral mesoporous silica nanoparticles for the adsorptive removal of the chiral insecticide sulfoxaflor from water.
Nanoscale Adv
December 2024
Department of Pharmaceutical Chemistry, College of Pharmacy, Taif University Taif 21944 Saudi Arabia.
Mesoporous materials have garnered significant interest because of their porous structure, large surface area and ease of surface functionalization to incorporate the functional groups of choice. Herein, chiral mesoporous silica nanoparticles (CMSNPs) were prepared using quaternary amino silane as the template, tetramethyl orthosilicate as the silica source and proline and cellulose as chiral selector. The developed CMSNPs were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), elemental analysis, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction analysis, BET surface area analysis and BJH pore size/volume analysis.
View Article and Find Full Text PDFBiomimetic exosome harnessing exosomal lipidomics and functional proteins for PEDF-pDNA delivery in high altitude pulmonary edema intervention.
J Control Release
January 2025
School of Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu Province, China. Electronic address:
In the realm of gene therapy, given the exceptional performance of native exosomes, researchers have redirected their innovative focus towards exosome-mimetic nanovesicles (EMNs); however, the current design of most EMNs relies heavily on native cells or their components, inevitably introducing inter-batch variability issues and posing significant challenges for quality control. To overcome the excessive reliance on native cellular components, this study adopts a unique approach by precisely mimicking the lipid composition of exosomes and innovatively incorporating histone components to recapitulate the gene transfer characteristics of exosomes. We selected sphingomyelin (SM), phosphatidylcholine (PC), phosphatidylserine (PS), phosphatidylethanolamine (PE), and cholesterol as the lipid components, and employed the double emulsion method to prepare biomimetic exosomes carrying histone A and PEDF-DNA plasmids (His-pDNA@EMNs).
View Article and Find Full Text PDFUsing a citizen science approach to assess nanoplastics pollution in remote high-altitude glaciers.
Sci Rep
January 2025
Department of Environmental Analytical Chemistry, Helmholtz Centre for Environmental Research (UFZ), 04318, Leipzig, Germany.
Nanoplastics are suspected to pollute every environment on Earth, including very remote areas reached via atmospheric transport. We approached the challenge of measuring environmental nanoplastics by combining high-sensitivity TD-PTR-MS (thermal desorption-proton transfer reaction-mass spectrometry) with trained mountaineers sampling high-altitude glaciers ("citizen science"). Particles < 1 μm were analysed for common polymers (polyethylene, polyethylene terephthalate, polypropylene, polyvinyl chloride, polystyrene and tire wear particles), revealing nanoplastic concentrations ranging 2-80 ng mL at five of 14 sites.
View Article and Find Full Text PDFTethered Balloon Cluster Deployments and Optimization for Emergency Communication Networks.
Entropy (Basel)
December 2024
College of Information Engineering, Shanghai Maritime University, Shanghai 201306, China.
Natural disasters can severely disrupt conventional communication systems, hampering relief efforts. High-altitude tethered balloon base stations (HATBBSs) are a promising solution to communication disruptions, providing wide communication coverage in disaster-stricken areas. However, a single HATBBS is insufficient for large disaster zones, and limited resources may restrict the number and energy capacity of available base stations.
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