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Flow electrolytic separation of radionuclides for interference suppression in γ-spectrometry.
Anal Chim Acta
February 2025
Department of Chemistry and Applied Biosciences, Laboratory of Inorganic Chemistry, ETH Zürich, Vladimir-Prelog-Weg 1-5/10, Zürich, CH-8093, Switzerland; Laboratory of Radiochemistry, Centre for Nuclear Engineering and Sciences, Paul Scherrer Institute, Forschungsstrasse 111, Villigen PSI, CH-5232, Switzerland. Electronic address:
Background: The direct and accurate measurement of low-level γ-emitters in samples from nuclear facilities is a challenging task due to the presence of high activities of dominant radionuclides. In this case a complex chemical separation is required to remove interfering radionuclides prior to γ-spectrometric analysis. Several radionuclides such as, Ag, Sb, Sn and Te are of relevance for radioanalytical analysis in nuclear facilities.
View Article and Find Full Text PDFOrigin of the Suppression of Magnetic Order in MnSi under Hydrostatic Pressure.
Phys Rev Lett
December 2024
Université Grenoble Alpes, CEA, Grenoble INP, IRIG-PHELIQS, F-38000 Grenoble, France.
We experimentally study the evolution of the magnetic moment m and exchange interaction J as a function of hydrostatic pressure in the zero-field helimagnetic phase of the strongly correlated electron system MnSi. The suppression of magnetic order at ≈1.5 GPa is shown to arise from the J collapse and not from a quantum fluctuations induced reduction of m.
View Article and Find Full Text PDFService Interruption in HIV Care Amid COVID-19 Pandemic in Myanmar: Results From Analysis of Routine Program Data 2018-2022.
J Int Assoc Provid AIDS Care
December 2024
Strategic Information Division, Population Services International, Yangon City, Myanmar.
Background: COVID-19 pandemic disrupted organized HIV screening efforts, HIV testing and management worldwide, and the impact of these disruptions from private HIV care clinics have not been examined in Myanmar. PSI/Myanmar had adapted through partner clinics, Sun Quality Health Clinics (SQH) and Lan Pya Kyel clinics (LPK), with measures like online booking, staff scheduling and awareness campaigns. The purpose of this paper was to describe whether HIV-related services changed before, during, and after the COVID-19 pandemic in Myanmar.
View Article and Find Full Text PDFImmobilisation of iodide in alkali-activated materials.
Chemosphere
December 2024
Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Hokkaido, Japan.
At the Fukushima Daiichi Nuclear Power Station (FDNPS), continuous water circulation cools fuel debris, leading to the presence of radionuclides such as Sr-30, Cs-137, and I-129 in the cooling water. These radionuclides are adsorbed and co-precipitated by various materials. Among them, I-129 is a key radionuclide for safety assessment during the final disposal of adsorbent and co-precipitation materials, owing to its long half-life and poor sorption.
View Article and Find Full Text PDFArticle Synopsis
- tRNAs are essential for translation and need various modifications to work properly; researchers studied a model bacterium, K-12, to understand these modifications.
- They conducted a synthetic lethal screen which uncovered 5 pairs of tRNA modifications that cannot coexist in certain conditions, and 15 pairs that cause growth issues when deleted together.
- One specific gene responsible for modifying tRNAs showed the most significant impact on growth, revealing insights into how tRNA modifications influence quality control in cells.
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