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Synthesis of an exfoliated kaolinite-poly(urea-formaldehyde) nanocomposite.
RSC Adv
January 2025
Laboratory of Applied Inorganic Chemistry, Department of Inorganic Chemistry, University of Yaoundé I P.O. Box 812 Yaoundé Cameroon
In this study, kaolinite-poly(urea-formaldehyde) was successfully prepared through the polymerization of urea intercalated within the kaolinite structure. Polymerization was carried out under ambient conditions by immersing kaolinite-urea in formaldehyde. Evidence of urea intercalation and polymerization was obtained from FTIR, XRD, and thermal analysis (TG-DSC).
View Article and Find Full Text PDFIntergenerational transfer of micro(nano)plastics in different organisms.
J Hazard Mater
January 2025
Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA.
Micro(nano)plastics (MNPs), widely distributed in the environment, can be ingested and accumulated by various organisms. Recently, the transgenerational transport of MNPs from parental organisms to their offspring has attracted increasing attention. In this review, we summarize the patterns, specific pathways, and related mechanisms of intergenerational transfer of MNPs in plants, non-mammals (zooplankton and fish) and mammals.
View Article and Find Full Text PDFThe effect of bone relaxation on the simulated pull-off force of a cementless femoral knee implant.
J Biomech
January 2025
Radboudumc, Orthopaedic Research Lab, PO Box 9101, 6500 HB Nijmegen, the Netherlands.
Aseptic loosening is the primary cause of revision in cementless total knee arthroplasty (TKA), emphasizing the importance of strong initial stability for long-term implant success. Pre-clinical evaluations are crucial for understanding implant fixation mechanics and improving implant designs. Finite element (FE) analysis models often use linear elastic bone material models, which do not accurately reflect bone's mechanical behavior.
View Article and Find Full Text PDFCrystallography of the litharge to massicot phase transformation from neutron powder diffraction data.
Acta Crystallogr B Struct Sci Cryst Eng Mater
February 2025
CSIRO Division of Mineral Products, Port Melbourne, Victoria, Australia.
The crystallographic phase change from tetragonal litharge (α-PbO; P4/nmm) to orthorhombic massicot (β-PbO; Pbcm) has been studied by full-matrix Rietveld analysis of high-temperature neutron powder diffraction data collected in equal steps from ambient temperature up to 925 K and back down to 350 K. The phase transformation takes place between 850 and 925 K, with the coexisting phases having equal abundance by weight at 885 K. The product massicot remains metastable on cooling to near ambient temperature.
View Article and Find Full Text PDFSize-Dependent Reduction Kinetics of Iron Oxides in Single and Mixed Mineral Systems.
Environ Sci Technol
January 2025
Geomicrobiology, Department of Geosciences, University of Tübingen, 72076 Tübingen, Germany.
Iron(III) (oxyhydr)oxide minerals with varying particle sizes commonly coexist in natural environments and are susceptible to both chemical and microbial reduction, affecting the fate and mobility of trace elements, nutrients, and pollutants. The size-dependent reduction behavior of iron (oxyhydr)oxides in single and mixed mineral systems remains poorly understood. In this study, we used microbial and mediated electrochemical reduction approaches to investigate the reduction kinetics and extents of goethite and hematite.
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