The use of polymeric nanocomposites has arisen as a promising solution to take advantage of the properties of nanoparticles (NPs) in diverse applications (e.g., water treatment, catalysis), while overcoming the drawbacks of free-standing nanoparticles (e.g., aggregation or accidental release). In most of the cases, the amount and size of the NPs will affect the stability of the composite as well as their performance. Therefore, a detailed characterization of the NPs present on the nanocomposites, including their quantification, is of vital importance for the optimization of these systems. However, the determination of the NPs load is often carried out by destructive techniques such as TGA or ICP-OES, the development of non-invasive approaches to that aim being necessary. In this work, the amount of silver NPs synthesized directly on the surface of melamine (ME) foams is studied using two non-invasive approaches: colorimetry and X-ray radiography. The obtained results show that the amount of silver NPs can be successfully determined from the luminosity and global color changes of the surface of the foams, as well as from the X-ray attenuance.
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http://dx.doi.org/10.3390/polym12050996 | DOI Listing |
J Chromatogr B Analyt Technol Biomed Life Sci
December 2024
Clinical Laboratory, Catharina Hospital Eindhoven, Eindhoven 5623 EJ, The Netherlands; Department of Biomedical Engineering, Chemical Biology, Eindhoven University of Technology, Groene Loper 3, Eindhoven 5612 AE, The Netherlands.
Monitoring of kidney function traditionally relies on plasma creatinine concentrations, necessitating invasive blood draws. Non-invasively obtainable biofluids, such as sweat and saliva, present a patient-friendly alternative with potential for continuous monitoring. This study focusses on developing and validating a novel Liquid Chromatography- tandem Mass Spectrometry (LC-MS/MS) assay as a reference test for measuring low creatinine concentrations in sweat and saliva.
View Article and Find Full Text PDFPediatr Radiol
January 2025
Department of Radiology, Cincinnati Children's Hospital Medical Center, 3333 Burnet Avenue, Cincinnati, OH, 45229, USA.
Quantitative abdominal magnetic resonance imaging (MRI) offers non-invasive, objective assessment of diseases in the liver, pancreas, and other organs and is increasingly being used in the pediatric population. Certain quantitative MRI techniques, such as liver proton density fat fraction (PDFF), R2* mapping, and MR elastography, are already in wide clinical use. Other techniques, such as liver T1 mapping and pancreas quantitative imaging methods, are emerging and show promise for enhancing diagnostic sensitivity and treatment monitoring.
View Article and Find Full Text PDFRSC Adv
January 2025
State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University Chongqing 400016 China +86-13708302390.
Nanomedicine enables precision-targeted therapies through a non-invasive approach, and nanoparticles may be biologically affected during their colonization . Ensuring the efficient expression of their performance , while ensuring biosafety, is of great significance. Previous studies have employed genetically engineered following entry as a genetically engineered targeting synergist, to enhance the effect of focused ultrasound ablation by exploiting its targeted colonization of tumor tissue.
View Article and Find Full Text PDFFront Neurosci
December 2024
Massachusetts General Hospital, Harvard Medical School, Boston, MA, United States.
Objective: High Angular Resolution Diffusion Imaging (HARDI) models have emerged as a valuable tool for investigating microstructure with a higher degree of detail than standard diffusion Magnetic Resonance Imaging (dMRI). In this study, we explored the potential of multiple advanced microstructural diffusion models for investigating preterm birth in order to identify non-invasive markers of altered white matter development.
Approach: Rather than focusing on a single MRI modality, we studied on a compound of HARDI techniques in 46 preterm babies studied on a 3T scanner at term-equivalent age and in 23 control neonates born at term.
Curr Med Imaging
January 2025
Department of Medical Ultrasound, The First Affiliated Hospital of Ningbo University, Ningbo, 315010, China.
Objective: This prospective study aimed to establish the typical viscosity range of the thyroid gland in healthy individuals using a new method called the Sound Touch Viscosity (STVi) technique with a linear array transducer.
Methods: Seventy-eight healthy volunteers were enrolled between March, 2023 and April, 2023. Thyroid viscosity was measured using the Resona R9 ultrasound system equipped with a linear array transducer (L15-3WU).
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