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Composite Sorbents Based on Chitosan Polymer Matrix and Derivatives of 4-Amino-N'-hydroxy-1,2,5-oxadiazole-3-carboximidamide for Uranium Removal from Liquid Mineralized Media.
Gels
January 2025
Institute of Natural Sciences and Technosphere Safety, Sakhalin State University, Sakhalin Region, 693000 Yuzhno-Sakhalinsk, Sakhalin Oblast, Russia.
Composite adsorbents based on a natural biopolymer matrix of chitosan, to which 4-amino-N'-hydroxy-1,2,5-oxadiazole-3-carboximidamide and its Se derivative were attached, were synthesized. A complex of physicochemical analysis methods indicates that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles of composite with developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media. It has been established that the direct introduction of a matrix with high ionic permeability into the reaction mixture contributes to the formation of homogeneous particles with a developed surface morphology, which enhances the kinetic and capacitive parameters of uranium sorption in liquid media.
View Article and Find Full Text PDFPreliminary evaluation of ex vivo and in vivo skin permeability of aromatic amines.
PLoS One
January 2025
Research Center for Chemical Information and Management, National Institute of Occupational Safety and Health, Kawasaki, Japan.
A potential link has been reported between skin exposure to aromatic amines, such as ortho-toluidine (OT) and 3,3'-dichloro-4,4'-diaminodiphenylmethane (MOCA), and bladder cancer cases observed in Japanese chemical factories. To evaluate this association, we explored the permeability of OT and MOCA through pig skin and investigated the subsequent changes in plasma and urine concentrations in rats following percutaneous exposure. Employing Yucatan micropig skin, we first executed a permeability test by affixing the skin to a diffusion cell and applying 14C-labeled OT or MOCA.
View Article and Find Full Text PDFDevelopment of a new tool to simultaneously measure soil-gas permeability and CO concentration as important parameters for geogenic radon potential assessment.
Environ Monit Assess
January 2025
Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, Krakow, PL-31342, Poland.
This study assessed the geogenic radon potential using PECAME, an innovative tool designed to simultaneously measure soil-gas permeability and CO concentration - two key parameters for understanding radon transport in soil. Comparative field studies using the RADON-JOK device in various geological settings in Japan and Poland demonstrate the effectiveness of PECAME. These studies reveal a strong correlation between PECAME and RADON-JOK, with an R value of 0.
View Article and Find Full Text PDFDevelopment and Evaluation in Rat and Monkey of a Candidate Homochiral Radioligand for PET Studies of Brain Receptor Interacting Protein Kinase 1: [F]()-1-(5-(3-Fluorophenyl)-4,5-dihydro-1-pyrazol-1-yl)-2,2-dimethylpropan-1-one.
ACS Chem Neurosci
January 2025
Molecular Imaging Branch, National Institute of Mental Health, National Institutes of Health, 10 Center Drive, Bethesda, Maryland 20892, United States.
Receptor interacting protein kinase 1 (RIPK1) crucially upregulates necroptosis and is a key driver of inflammation. An effective PET radioligand for imaging brain RIPK1 would be useful for further exploring the role of this enzyme in neuroinflammation and for assisting drug discovery. Here, we report our progress on developing a PET radioligand for RIPK1 based on the phenyl-1-dihydropyrazole skeleton of a lead RIPK1 inhibitor, GSK'963.
View Article and Find Full Text PDFA study on the mechanical and radiation shielding characteristics of concrete samples reinforced with brass alloy and boron carbide.
Appl Radiat Isot
March 2025
Bingöl University, Faculty of Arts and Science, Department of Physics, 12000, Bingöl, Türkiye.
In this study, the gamma radiation shielding properties of concrete samples reinforced with 10%, 20%, 30%, 40% and 50% of the cement weight of brass alloy were investigated. To test gamma shielding performance of the samples, mass and linear attenuation coefficients, half and tenth value layers, effective atomic number and radiation protection efficiency parameters were determined experimentally, theoretically and Monte Carlo simulations (GEANT4 and FLUKA). The studies were performed at 11 different gamma energies that range from 59.
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