It has been ascertained that high-disperse powders of iron obtained by a thermochemical method in the process of formation of particles with pre-determined physical-and-chemical and medical-and-biological properties (essentially monodisperse, harmless, capable of exerting a bactericidal action, having an as-needed specific surface, corrosion resistance, withstanding sterilization heat up to 120 degrees C, allowing the magnetic characteristics to be controlled, etc.) can be used for directed transport of medicinal substances (thyroxin), hormone control, protection of the organism from overdosing of the administered drug preparations. Feasibility is shown of prolonged administration of thyroid hormones through the gastrointestinal wall with the aid of high-disperse ferromagnetic compositions as containers-carriers, which fact may secure the organism-controlled maintenance of the thyroid status in various thyroidal pathologies.
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NanoImpact
January 2025
Géosciences Rennes, CNRS/Université Rennes, 263 av. Général Leclerc, 35000 Rennes, France.
Nanoplastics (NPs) are gaining increasing attention due to their widespread distribution and potential environmental and biological impacts. Spanning a variety of ecosystems - from soils and rivers to oceans and polar ice - NPs interact with complex biological and geochemical processes, posing risks to organisms across multiple trophic levels. Despite their growing presence, understanding the behavior, transport, and toxicity of nanoplastics remains challenging due to their diverse physical and chemical properties as well as the heterogeneity of environmental matrices.
View Article and Find Full Text PDFWater Res
January 2025
Department of Civil and Environmental Engineering, Stanford University, Stanford, CA 94305, USA. Electronic address:
Dry wells are neighborhood-scale stormwater infiltration systems increasingly used in drought-prone areas for stormwater capture and groundwater recharge. These systems bypass the low permeability surface soil to maximize infiltration rates. However, hydrophilic contaminants of emerging concern (CECs) in urban runoff pose potential groundwater contamination risks.
View Article and Find Full Text PDFACS Nano
January 2025
James Franck Institute, University of Chicago, Chicago, Illinois 60637, United States.
Phonon dynamics and transport determine how heat is utilized and dissipated in materials. In 2D systems for optoelectronics and thermoelectrics, the impact of nanoscale material structure on phonon propagation is central to controlling thermal conduction. Here, we directly observe in-plane coherent acoustic phonon propagation in black phosphorus (BP) using ultrafast electron microscopy.
View Article and Find Full Text PDFChem Commun (Camb)
January 2025
Institute of Sustainability for Chemicals, Energy and Environment (ISCE2), Agency for Science, Technology and Research (A*STAR), 1 Pesek Road, Singapore 627833, Republic of Singapore.
Polymeric materials are ubiquitous in modern life. Similar to many other technological applications, polymer materials are essential in advancing the green hydrogen economy, offering solutions for hydrogen production, storage, transport, and utilization. In production, polymeric proton exchange membranes in water electrolysers enable efficient green hydrogen generation using renewable energy.
View Article and Find Full Text PDFDokl Biochem Biophys
January 2025
Ryazan State Medical University, Ryazan, Russian Federation.
Introduction: Breast cancer resistance protein (BCRP) is an efflux membrane transporter that controls the pharmacokinetics of a large number of drugs. Its activity may change when taking some endo- and exogenous substances, thus making it a link in drug interactions.
Aim: The aim of the study was to develop a methodology for testing drugs for belonging to BCRP substrates and inhibitors in vitro.
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