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Found 10,396 Results / Page 3 of 694
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Single-molecule visualization of ATP-induced dynamics of the subunit composition of an ECF transporter complex under turnover conditions
2025 / Nature CommunicationsEnergy-Coupling Factor (ECF) transporters are ATP-binding cassette (ABC) transporters essential for uptake of vitamins and cofactors in prokaryotes. They have been linked to pathogen virulence and are potential targets for antimicrobials. ECF transporters have been proposed to use a unique transport mechanism where a substrate-translocating subunit (S-component) ...
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Advanced eco-friendly spectrophotometric analysis for Nebivolol, Valsartan, and related impurity with comprehensive environmental impact assessment
2025 / Scientific ReportsAt present, one of the main priorities for analysts is creating more sustainable and environmentally friendly methods for pharmaceutical analysis. In this context, three innovative spectrophotometric techniques, using tri-colored (green, blue, and white), were optimized and developed to simultaneously assess two antihypertensive drugs, Nebivolol hydrochloride (NE...
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Targeted delivery of doxorubicin to B-cell lymphoma using monoclonal antibody-functionalized Chaetoceros biosilica
2025 / Scientific ReportsThe use of biogenic nanoparticles as targeted drug delivery systems has gained increasing attention for improving anticancer therapies. This study investigates the effectiveness of porous biosilica derived from the diatom Chaetoceros sp., functionalized with hydrophilic GPTMS, labeled with CD-19 antibody, and loaded with doxorubicin in targeting Raji cells, a B l...
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Pyrrole dicarboxylate substituted porphyrazine, microwave assisted synthesis and properties
2025 / Scientific ReportsIn this study, a new magnesium(II) porphyrazine derivative tetrasubstituted with dicarboxypyrrolyl moieties was synthesized. Two different approaches were used, utilizing conventional heating and microwave irradiation. The developed three-step processes were compared showing the superior performance of the microwave-assisted organic synthesis. The new macrocycle ...
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Central-to-Axial-to-Central Chirality Transfer in the Au(I)-Catalyzed Cycloisomerization of Propargyl Vinyl Ethers to Cyclopentadienes
2025 / The Journal of Organic ChemistryAn easy approach to the enantioselective synthesis of five-, six-, and seven-membered ring-fused cyclopentadienes (85–99% ee) is based on the Au(I)-catalyzed cycloisomerization of enantiomerically pure or enriched propargyl vinyl ethers, which occurs with complete central-to-axial-to-central chirality transfer. DFT calculations show that the formation of a no...
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Quantum Dots and Perovskites-Based Physically Unclonable Functions for Binary and Ternary Keys via Optical-to-Electrical Conversion
2025 / Advanced Functional MaterialsPhysically unclonable functions (PUFs) are hardware-based security keys that are considered one of the most promising next-generation security solutions for intelligent systems. Numerous studies have reported on optical and electrical PUFs; however, these PUFs exhibit certain limitations, such as complicated readout systems and low encoding capacity. Optoelectronic...
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Evidence for two kinds of hydrogen-bonding networks in ionic solutions by 2D infrared correlation spectroscopy
2025 / Scientific ReportsIR spectra from 4000 to 100 cm–1 were measured for four kinds of alkali chloride solutions (LiCl, NaCl, KCl, CsCl solutions) with different concentrations. Their second derivative spectra revealed two bands around 3400 and 3160 cm–1 attributed to the OH stretching mode of weakly hydrogen-bonded (WHB) and strongly hydrogen-bonded (SHB) water species, r...
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A self-assembled protein β-helix as a self-contained biofunctional motif
2025 / Nature CommunicationsNature constructs matter by employing protein folding motifs, many of which have been synthetically reconstituted to exploit function. A less understood motif whose structure-function relationships remain unexploited is formed by parallel β-strands arranged in a helical repetitive pattern, termed a β-helix. Herein we reconstitute a protein β-helix ...
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Deep learning-developed multi-light source discrimination capability of stretchable capacitive photodetector
2025 / npj Flexible ElectronicsWe introduce a novel stretchable photodetector with enhanced multi-light source detection, capable of discriminating light sources using artificial intelligence (AI). These features highlight the application potential of deep learning enhanced photodetectors in applications that require accurate for visual light communication (VLC). Experimental results showcased...
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Enantiomeric diarylheptanoids from Ottelia acuminata var. acuminata and their α-glucosidase inhibitory activity
2025 / Natural Products and BioprospectingOtteacumienes G–K (1–5), five pairs of enantiomeric diarylheptanoids, along with one undescribed diarylheptanoid glycoside and one new lignan, were isolated from Ottelia acuminata var. acuminata. Compounds 1–5 were identified as five pairs of enantiomers and their structural configurations were determined through a combination of spectroscopic ana...
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Effect of deposition rate on micromorphology analyses and optical parameters in amorphous carbon nickel thin films
2025 / Scientific ReportsIn this work, the micromorphology of the Ni @ amorphous carbon films and their relationship to other optical properties using atomic force microscopic (AFM) imaging were examined. The surface topography of these Ni @ amorphous carbon sheets was reported using stereometric analysis and the SPIPTM 6.7.4 software in compliance with ISO 25178-2:2012 and ASME B46.1-20...
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Development of two semiconducting supramolecular metallogels of Cd(II)- and Hg(II)-ions from 5-aminoisophthalic acid gelator for high-performance Schottky diodes and advanced microelectronic applications
2025 / Discover MoleculesTwo novel metallogels, designated as Cd-AIA and Hg-AIA, were synthesized at ambient temperature utilizing 5-aminoisophthalic acid (AIA) as the gelator, along with cadmium(II) acetate and mercury(II) acetate in N,N-dimethylformamide. Rheological tests validated the mechanical robustness of the Cd(II)- and Hg(II)-based metallogels under various conditions. Characteri...
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Long-Term Study of Optical Nanoparticles Doped With Yb3+/Er3+ and Transition Metal Ions and their Real Application for Imaging and Temperature Sensing on Triticum Aestivum L.
2025 / Advanced Optical MaterialsUpconverting nanoparticles (UCNPs) have incredible potential for countless applications, especially in biology and medicine. These NPs can be used to bioimaging animals and plants and analyze their physiology, metabolic pathways, or intercellular interactions in real-time. However, before reaching such an application, the UCNPs physicochemical properties during pro...
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Self-generated temperature gradient under uniform heating in p–i–n junction carbon nanotube thermoelectric generators
2025 / Scientific ReportsSingle-walled carbon nanotubes (SWCNTs) have attracted attention for use in thermoelectric generators (TEGs) that convert thermal energy into electricity. SWCNTs, which are lightweight, flexible, and nontoxic materials, are perfectly suited for TEGs as self-contained power sources for Internet of Things (IoT) sensors. However, the generation of electricity by TEG...
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Geometric Adjustment of T Cell - Sensitive Nanorobots for Enhanced Stability
2025 / Advanced Healthcare MaterialsPersonalizeddendriticcell(DC)basedvaccinesofferpromising immunotherapeuticapproachesforcancersandinfectiousdiseasesby leveraginglivingDCstostimulateapatient’simmunesystemthrough interactionswithTcells.However,conventionalDC-basedvaccinesface significantchallenges, includinglimitedstabilityandshortstoragelifespanof thelivingcells.Toovercometheselimitations,sma...
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