Algorithms that estimate the location, time, and magnitude of a point-source atmospheric release using remotely sampled air concentrations typically use data for a single chemical or radioactive isotope. A Bayesian algorithm is presented that uses data from multiple radioactive isotopes that are all released in the same short-duration event. Data from noble gas and aerosol samplers can be used simultaneously in the model. Application to a large synthetic data set using four isotopes shows the new algorithm generally gives more accurate location and time estimates than a comparable model using a single isotope.
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http://dx.doi.org/10.1016/j.jenvrad.2024.107544 | DOI Listing |
Materials (Basel)
January 2025
School of Material Science and Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.
Hydrogen has emerged as a prominent candidate for future energy sources, garnering considerable attention. Given its explosive nature, the efficient detection of hydrogen (H) in the environment using H sensors is paramount. Chemoresistive H sensors, particularly those based on noble-metal-decorated metal oxide semiconductors (MOSs), have been extensively researched owing to their high responsiveness, low detection limits, and other favorable characteristics.
View Article and Find Full Text PDFEJNMMI Phys
January 2025
Department for Radiation Protection and Medical Physics, Hannover Medical School, Carl-Neuberg- Str. 1, 30625, Hannover, Germany.
Background: Treatment with Ra-223 dichloride is approved for the therapy of castration resistant prostate cancer (CRPC) with symptomatic bone metastases and no known visceral metastases in Europe since 2013, and Ra-223 is under discussion for labelling other molecules and nanoparticles. The direct progeny of Ra-223 is Rn-219, also known as actinon, a radioactive noble gas with a half-life of 3.98 s.
View Article and Find Full Text PDFChemistry
January 2025
Tianjin University, Department of Chemistry, 92 Weijin Road, 300072, Tianjin, CHINA.
Hydrogen peroxide (H2O2) is a versatile chemical widely used in various industries. The traditional anthraquinone method for H2O2 synthesis has environmental and safety concerns due to the use of organic solvents and hazardous by-products. The direct synthesis of H2O2 from H2 and O2 poses risks of flammability and explosion.
View Article and Find Full Text PDFEnviron Res
January 2025
College of Energy and Electrical Engineering, Qinghai University, Xining, Qinghai, 810016, China; CHN Energy group Qinghai Electric Power Co., LTD, Xining, Qinghai, 810008, China. Electronic address:
This research using the first-principles theory introduces Pd- and Pt-functionalized WSe monolayers as promising materials for detecting three critical gases (H, CO, and CH), to evaluate the health of Li-ion battery (LIBs). Various sites on the pristine WSe monolayer are considered for the functionalization with Pd and Pt atoms. The adsorption performances of the determined Pd- and Pt-WSe monolayers upon the three gases are analyzed by the comparative highlight of the adsorption energy, bonding behavior and electron transfer.
View Article and Find Full Text PDFSci Transl Med
January 2025
Department of Neurology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.
Alzheimer's disease (AD) is the most prevalent neurodegenerative disorder. Antiamyloid antibody treatments modestly slow disease progression in mild dementia due to AD. Emerging evidence shows that homeostatic dysregulation of the brain immune system, especially that orchestrated by microglia, plays an important role in disease onset and progression.
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