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Revisiting the safety limit in magnetic nanoparticle hyperthermia: insights from eddy current induced heating.
Phys Med Biol
January 2025
Department of Physics, Aristotle University of Thessaloniki, University Campus, Thessaloniki, 54124, GREECE.
Magnetic nanoparticle hyperthermia (MNH) emerges as a promising therapeutic strategy for cancer treatment, leveraging alternating magnetic fields (AMFs) to induce localized heating through magnetic nanoparticles (MNPs). However, the interaction of AMFs with biological tissues leads to non-specific heating caused by eddy currents, triggering thermoregulatory responses and complex thermal gradients throughout the body of the patient. While previous studies have implemented the Atkinson-Brezovich limit to mitigate potential harm, recent research underscores discrepancies between this threshold and clinical outcomes, necessitating a re-evaluation of this safety limit.
View Article and Find Full Text PDFNon-adiabatic quantum electrodynamic effects on electron-nucleus-photon systems: Single photonic mode vs infinite photonic modes.
J Chem Phys
January 2025
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
The quantum-electrodynamic non-adiabatic emission (QED-NAE) is a type of radiatively assisted vibronic de-excitation due to electromagnetic vacuum fluctuations on non-adiabatic processes. Building on our previous work [Tsai et al., J.
View Article and Find Full Text PDFG-Quadruplex DNAzyme-Based Biocatalysis Combined with an Intelligent Electromagnetic-Actuated Microfluidic Chip for Tetracycline Detection.
J Agric Food Chem
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College of Ocean Food and Biological Engineering, Jimei University, Xiamen 361021, China.
In this study, we present an intelligent electromagnetic-actuated microfluidic chip integrated with a G-quadruplex DNAzyme-based biocatalysis platform for rapid and sensitive tetracycline (TC) detection. In this sensing system, TC significantly quenches fluorescent magnetic carbon dots (M-CDs) via the internal filtration effect and dynamic quenching (the excitation and emission wavelength at 350 and 440 nm, respectively). Then, the G-quadruplex on the M-CDs-Aptamer is exposed and bound with hemin to form hemin-G-quadruplex DNAzyme, catalyzing the conversion of 3,3',5,5'-tetramethylbenzidine to produce blue color.
View Article and Find Full Text PDFDetection of ultrafast electron energization by whistler-mode chorus waves in the magnetosphere of Earth.
Sci Rep
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Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Sagamihara, 252-5210, Japan.
Electromagnetic whistler-mode chorus waves are a key driver of variations in energetic electron fluxes in the Earth's magnetosphere through the wave-particle interaction. Traditionally understood as a diffusive process, these interactions account for long-term electron flux variations (> several minutes). However, theories suggest that chorus waves can also cause rapid (< 1 s) electron acceleration and significant flux variations within less than a second through a nonlinear wave-particle interaction.
View Article and Find Full Text PDFLeveraging ligand conjugation to improve luminescence thermometry in Dy-single-molecule magnets.
Chem Commun (Camb)
January 2025
Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Madhya Pradesh, 462066, India.
Article Synopsis
- Extended ligand conjugation improves luminescent thermometry in Dy-based single-molecule magnets (SMMs) through crystallographic, photoluminescence, and lifetime decay studies.
- This enhancement allows for effective energy transfer from the ligands to the Dy metal centers.
- The results show a significant excited-state lifetime of Dy(III), indicating efficient interactions due to the ligand modifications.
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