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Thorium ore dust research applicable to mineral sands industry workers.
J Radiol Prot
January 2025
School of Medical and Health Sciences, Edith Cowan University, Joondalup, Western Australia, AUSTRALIA.
Historically, radiation exposure to mineral sands workers arose primarily from intake of thorium associated with monazite dust generated in mineral separation plants. Research investigations in the 1990s provided greater insight into the characteristics of inhaled thorium ore dust and bioassay studies inferred that some workers had accumulated significant lung burdens of thorium. Recent changes to biokinetic models have increased the radiation dose assessed to arise from thorium intake, raising questions on the appropriateness of current assumptions used in exposure assessment and feasibility of further bioassay research.
View Article and Find Full Text PDFThCTi@(6)-C: Th═C Double Bond in a Mixed Actinide-Transition Metal Cluster.
J Am Chem Soc
January 2025
College of Chemistry, Chemical Engineering and Materials Science, and State Key Laboratory of Radiation Medicine and Protection, Soochow University, Suzhou, Jiangsu 215123, P. R. China.
A thorium-carbon double bond that corresponds to the sum of theoretical covalent double bond radii has long been sought after in the study of actinide-ligand multiple bonding as a synthetic target. However, the stabilization of this chemical bond remains a great challenge to date, in part because of a relatively poor energetic matching between 5f-/6d- orbitals of thorium and the 2s-/2p- frontier orbitals of carbon. Herein, we report the successful synthesis of a thorium-carbon double bond in a carbon-bridged actinide-transition metal cluster, i.
View Article and Find Full Text PDFMeasurement of natural radionuclides and health risk assessment in soil samples of the Main Central Thrust region in Garhwal Himalaya, India.
Environ Monit Assess
January 2025
Department of Physics, H.N.B. Garhwal University, Badshahi Thaul Campus, Tehri Garhwal, 249199, India.
Ionizing radiation emitted from radionuclides is present everywhere in the environment. It is the main source of health hazards to the general public. The present study elaborates on the analysis of primordial radionuclides in the collected soil samples from the Main Central Thrust (MCT) region of Uttarakhand Himalaya in a grid pattern.
View Article and Find Full Text PDFEvidences of radioresistance in from Northeastern Brazil.
Int J Radiat Biol
December 2024
Laboratório de Genética, Centro Acadêmico de Vitória, Universidade Federal de Pernambuco (UFPE), Vitória de Santo Antão, Pernambuco, Brazil.
Background: Ionizing radiation can inflict cellular damage, the severity of which is determined by the dose, exposure duration, and its capacity to penetrate cells. Some studies have demonstrated that genetic and epigenetic mechanisms have enabled organisms to develop adaptive traits and enhance their ability to repair DNA damage. Northeastern Brazil, a region containing rocky outcrops rich in uranium and thorium, is an ideal scenario to study natural radiation and its effects on natural populations.
View Article and Find Full Text PDFPlant transfer factors of naturally occurring radioactive decay series radionuclides, Be, and Cs in a semi-arid climate.
Appl Radiat Isot
December 2024
Department of Applied Physic, ETS Arquitectura, University of Seville, 41013, Sevilla, Spain.
Arid and semi-arid climates give rise to drought stress in plants, implying an increased uptake of radionuclides through both leaves and roots. This study was carried out in the Tabernas Desert (Almería, Spain), classified as an arid climate. Seventeen plants were analyzed, collected from four areas of the study site.
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