In this study, full widths at half maximum (FWHM), asymmetry indexes, chemical shifts (ΔE) and Kβ-to-Kα X-ray intensity ratios of some pure metals (Mn, Fe, Cu and Zn) and some of their oxidized compounds (MnO, FeO, FeO, CuO and ZnO) were investigated. The samples were excited by 59.54 keV photons emitted from aAm radioisotopes source and characteristic K X-rays emitted from the samples were counted by a Si(Li) detector. The results have shown that the Kβ-to-Kα X-ray intensity ratios, asymmetry indexes, chemical shifts and full widths at half maximum (FWHM) values can change with sample sizes.
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http://dx.doi.org/10.1016/j.apradiso.2023.110861 | DOI Listing |
Eur J Protistol
January 2025
Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China. Electronic address:
Diatom blooms are a global ecological perturbation that releases algal organic matter (AOM), significantly affecting coastal ecosystems by altering microbial community dynamics. AOM, derived from algal cell lysis, may serve as a nutrient source influencing protistan communities. However, the effects of AOM on protistan ecology, including the community structure and assembly processes, remain largely unexplored in coastal sediments.
View Article and Find Full Text PDFSci Rep
January 2025
College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, 730000, PR China.
Climate change is shifting optimal habitats for medicinal plants, potentially compromising the efficacy and therapeutic value of herbal remedies. Global warming and increased extreme weather events threaten the sustainability and pharmaceutical integrity of Angelica sinensis (Oliv.) Diels (A.
View Article and Find Full Text PDFNat Commun
January 2025
State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao, Shandong, P.R. China.
Pt/α-MoC catalysts exhibit exceptional activity in low-temperature water-gas shift reactions. However, quantitatively identifying and fine-tuning the active sites has remained a significant challenge. In this study, we reveal that fully exposed monolayer Pt nanoclusters on molybdenum carbides demonstrate mass activity that exceeds that of bulk molybdenum carbide catalysts by one to two orders of magnitude at 100-200 °C for low-temperature water-gas shift reactions.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
January 2025
Leibniz-Institut fur Festkorper- und Werkstoffforschung Dresden eV, Helmholtzstraße 20, 01069, Dresden, GERMANY.
This study presents the first successful demonstration of growing elemental bismuth (Bi) thin films via thermal atomic layer deposition (ALD) using Bi(NMe2)3 as the precursor and Sb(SiMe3)3 as the co-reactant. The films were deposited at a relatively low temperature of 100 °C, with a growth per cycle (GPC) of 0.31-0.
View Article and Find Full Text PDFDalton Trans
January 2025
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninsky Prospekt 53, 119991 Moscow, Russian Federation.
We synthesized and investigated a new series of Sm 1,3-diketonate complexes with CF-homologous thiophene-containing ligands. A clear correlation was found between the number of fluorine atoms in the 1,3-diketone's carbon chain and the luminescent properties of the samarium(III) complexes. The ligand modification method employed facilitates targeted and significant enhancements in the photoluminescence quantum yield (PLQY).
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