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Gadolinium oxide nanoparticles as a multimodal contrast enhancement agent for pre-clinical proton imaging.
Phys Med Biol
January 2025
Department of Medical Physics, Ludwig-Maximilians-Universität München, Am Coulombwall 1, Garching b. München, 85748, GERMANY.
Orthotopic tumor models in pre-clinical translational research are becoming increasingly popular, raising the demands on accurate tumor localization prior to irradiation. This task remains challenging both in X-ray and proton computed tomography (xCT and pCT, respectively), due to the limited contrast of tumor tissue compared to the surrounding tissue. We investigate the feasibility of gadolinium oxide nanoparticles as multimodal contrast enhancement agent for both imaging modalities.
View Article and Find Full Text PDFA novel magnetic-assisted ionic liquid-based microextraction method (MA-ILBME): Specific design system for sensitive spectrophotometric analysis of paracetamol as a pharmaceutical pollutant in environmental samples.
Talanta
December 2024
Department of Chemistry, Faculty of Basic Sciences, Ayatollah Boroujerdi University, Boroujerd, Iran.
Monitoring paracetamol levels in environmental samples is essential, as this widely used pharmaceutical can degrade water quality and adversely affect both ecosystems and human health. To address this issue, a novel, simple, sensitive, and accurate method has been developed. This method employs a functionalized ionic liquid, 2-(4-hydroxybenzyl)hydrazinium chloride ([HBH][Cl]), specifically designed to structurally mimic paracetamol and function as a complexing agent.
View Article and Find Full Text PDFHf Doping Boosts the Excellent Activity and Durability of Fe-N-C Catalysts for Oxygen Reduction Reaction and Li-O Batteries.
Nanomaterials (Basel)
December 2024
The Key Laboratory of Fuel Cell Technology of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China.
Developing highly active and durable non-noble metal catalysts is crucial for energy conversion and storage, especially for proton exchange membrane fuel cells (PEMFCs) and lithium-oxygen (Li-O) batteries. Non-noble metal catalysts are considered the greatest potential candidates to replace noble metal catalysts in PEMFCs and Li-O batteries. Herein, we propose a novel type of non-noble metal catalyst (Fe-Hf/N/C) doped with Hf into a mesoporous carbon material derived from Hf-ZIF-8 and co-doping with Fe and N, which greatly enhanced the activity and durability of the catalyst.
View Article and Find Full Text PDFCovalently Cross-Linked Polyelectrolyte Complex Nanoparticles with Enhanced Stability against Dissociation at High Ionic Strength.
Langmuir
December 2024
McKetta Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States.
Polyelectrolyte complex nanoparticles (PECNPs) often fully dissociate into individual polycations (PC) and polyanions (PA) at high salinities. Herein, we introduce a novel type of colloidally stable PECNP in which the PC is cross-linked, in this case branched polyethylenimine (PEI) to limit this dissociation, even in solutions up to 5.2 M NaCl or 5.
View Article and Find Full Text PDFAn AI dose-influence matrix engine for robust pencil beam scanning protons therapy.
Med Phys
December 2024
National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, People's Republic of China.
Background: Rapid planning is of tremendous value in proton pencil beam scanning (PBS) therapy in overcoming range uncertainty. However, the dose calculation of the dose influence matrix (D) in robust PBS plan optimization is time-consuming and requires substantial acceleration to enhance efficiency.
Purpose: To accelerate the D calculations in PBS therapy, we developed an AI-D engine integrated into our in-house treatment planning system (TPS).
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