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Geochemical signatures and contamination levels of rare earth elements in soil profiles controlled by parent rock and soil properties.
Environ Sci Pollut Res Int
January 2025
Department of Agricultural Chemistry, National Taiwan University, Taipei, 106319, Taiwan.
Rare earth elements (REEs) are emerging contaminants rendering potential risks in soils to environmental quality and human health. The causation between their geochemical signatures and contamination levels with parent rocks and soil properties are critical for REEs risk assessments, which are urgently needed globally. Thus, this study aimed to elucidate cause-and-effect among hydrofluoric-acid-digested total and ethylenediaminetetraacetic acid extracted bioavailable soil REEs and their contamination degree evaluated by pollution indices in 268 soil layer (horizon) samples from 50 soil profiles derived from felsic, intermediate, mafic, ultramafic, and sedimentary rocks in Taiwan.
View Article and Find Full Text PDFRapid lightsheet fluorescence imaging of whole Drosophila brains at nanoscale resolution by potassium acrylate-based expansion microscopy.
Nat Commun
December 2024
Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan.
Taking advantage of the good mechanical strength of expanded Drosophila brains and to tackle their relatively large size that can complicate imaging, we apply potassium (poly)acrylate-based hydrogels for expansion microscopy (ExM), resulting in a 40x plus increased resolution of transgenic fluorescent proteins preserved by glutaraldehyde fixation in the nervous system. Large-volume ExM is realized by using an axicon-based Bessel lightsheet microscope, featuring gentle multi-color fluorophore excitation and intrinsic optical sectioning capability, enabling visualization of Tm5a neurites and L3 lamina neurons with photoreceptors in the optic lobe. We also image nanometer-sized dopaminergic neurons across the same intact iteratively expanded Drosophila brain, enabling us to measure the 3D expansion ratio.
View Article and Find Full Text PDFWhat Goes Around Should Not Move Around: Immobilizing Microplastics as a New Approach for Analytical Ring Trials.
Environ Sci Technol
December 2024
Leibniz Institute for Baltic Sea Research Warnemünde, Rostock 18119, Germany.
Article Synopsis
- * Current ILCs often struggle with variability due to the difficulty of producing identical samples, which complicates uncertainty measurement.
- * The authors propose a filtration-immobilization technique that allows the same sample to be measured across different labs, showing a 77% reduction in measurement uncertainty compared to traditional ILC methods, with potential applications for archiving and creating reference samples in other areas of research.
Self-Extracting Dextran-Based Hydrogel Microneedle Arrays with an Interpenetrating Bioelectroenzymatic Sensor for Transdermal Monitoring with Matrix Protection.
Adv Healthc Mater
January 2025
Department of Molecular Chemistry, Univ. Grenoble Alpes-CNRS, 38041 Grenoble, France.
Continuous glucose monitors have revolutionized diabetes management, yet such devices are limited by their cost, invasiveness, and stability. Microneedle (MN) arrays could offer improved comfort compared to invasive implanted or mm-sized needle devices, but such arrays are hampered by complex fabrication processes, limited mechanical and sensor stability, and/or cytotoxicity concerns. This work demonstrates the first crosslinked hydrogel microneedle-bioelectroenzymatic sensor arrays capable of biomarker extraction and robust transdermal continuous monitoring in artificial interstitial fluid for 10 days.
View Article and Find Full Text PDF4D Printing of Liquid Crystal Emulsions for Smart Structures with Multiple Functionalities.
Angew Chem Int Ed Engl
November 2024
Institute for Molecular Systems Engineering and Advanced Materials (IMSEAM), Heidelberg University, 69120, Heidelberg, Germany.
3D printing, and more recently 4D printing, has emerged as a transformative technology for fabricating structures with complex geometries and responsive properties. However, employing functional colloidal solutions as inks for printing remains unexplored. In this work, we present a novel and versatile 4D printing approach for fabricating functional and complex-shaped objects using polymerizable liquid crystal (LC) emulsion droplets.
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