Results 91 to 100 of about 3,656,066 (246)

Assessment and Correction of Non‐Linearity Effects for In Situ Rb‐Sr Geochronology Applied to High 87Rb/86Sr Mica

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 601-624, September 2026.
Key Points Measurement of 86Sr at count rates < 1500 cps can result in statistical bias. Non‐linear signals in analogue detection mode (e.g., Rb) present a challenge for accurately dating high 87Rb/86Sr mica (> 1000). Accounting for these considerations, high 87Rb/86Sr mica are dated here with accuracies of ∼ 1%.
Duane C. Petts, William J. Davis, Simon E. Jackson, Jamie A. Cutts, Janina Czas, Alfredo Camacho   +5 more
wiley   +1 more source

Quantum mechanical study of the influence of noble metals on the process of reduction of uranium oxides

Nuclear Engineering and Technology
A DFT study of electrochemical reductions of uranium oxides in the presence of noble metals was performed. The study focused on the effects produced by the presence of Ag, Au, Pt and Pd on the rate of UOx reduction and on the composition of the resulting
A.S. Vorob'ev, A.Y. Galashev, Yu P. Zaikov   +2 more
doaj   +1 more source

(NH4)2[Tc2O2(S2O7)4]: An Unexpected Technetium(V)‐Sulfate From the Reaction of (NH4)(TcO4) With SO3

Chemistry – A European Journal, Volume 32, Issue 29, 7 August 2026.
The reaction of the radioactive pertechnetate (99TcO4)− with the oxidizer SO3 leads to blue crystals of (NH4)2[Tc2O2(S2O7)4]. The complex dimeric [Tc2O2(S2O7)4]2− anion exhibits the technetium in the oxidation state V, showing that reduction occurs during the reaction.
Stefan Sutorius, Julian Heinen, David van Gerven, Jörn Bruns, Erik Strub, Mathias S. Wickleder   +5 more
wiley   +1 more source

Exploring cluster formation in uranium oxidation using high resolution X-ray spectroscopy at elevated temperatures

Communications Materials
Uranium dioxide (UO2) is a complex material with significant relevance to nuclear energy, materials science, and fundamental research. Understanding its high-temperature behavior is crucial for developing new uranium-based materials and improving nuclear
Elena F. Bazarkina, Stephen Bauters, Yves Watier, Stephan Weiss, Sergei M. Butorin, Kristina O. Kvashnina   +5 more
doaj   +1 more source

Bioleaching of uranium from ores and rocks using filamentous fungi

Frontiers in Microbiology
The purpose of this article is to review the role of filamentous fungi in the leaching of uranium from ores and rocks. Fungi produce short-chain fatty acids through the fermentation and partial oxidation of organic compounds.
Tariq M. Bhatti, Olli H. Tuovinen
doaj   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, Volume 28, Issue 15, 5 August 2026.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

W‐N‐C Tandem Catalytic Centers Mediating Efficient Charge Transfer for the Enhanced Radical‐Path U(VI) Photoreduction

Advanced Science, Volume 13, Issue 44, 7 August 2026.
This work constructed a tandem W−N−C center to simultaneously achieve the regulation of reaction pathways and optimization of charge separation efficiency. The Lewis‐acidic W6+ sites activated O2 to generate O2−$O_2^ - $, with enhanced charge separation via electronic modulation, steering U(VI) reduction down an efficient radical pathway.
Zhiyao Wu, Jinhao Xu, Hao Fu, Yuxiang Deng, Nannan Wang, Wenhua Zhang, Peng Zhang, Zhiwei Huang, Zhenpeng Cui, Shu‐Xian Hu, Wangsuo Wu, Duoqiang Pan   +11 more
wiley   +1 more source

Effect of Microbial Biomass on Formation of Structurally Incorporated Uranium in Iron Oxides and Their Geochemical Behavior

Yuanzineng kexue jishu
Uranium can be incorporated into the octahedral sites of high crystalline iron oxides such as goethite, magnetite, lepidocrocite, green-rust and hematite, in substitution of iron as either pentavalent uranium U(Ⅴ) or hexavalent uranium U(Ⅵ) during ...
XIA Qingyin
doaj   +1 more source

Herba Lysimachiae Polysaccharide‐Modified Selenium Nanoparticles Alleviate Oxidative Injury in Kidney Stones via TOMM22‐Regulated Mitophagy Activation

Advanced Science, Volume 13, Issue 46, 17 August 2026.
HLP‐SeNPs, a Lysimachia christinae polysaccharide‐modified selenium nanoparticle, treat kidney stones by downregulating TOMM22 expression, which reduces PINK1 translocation into mitochondria and promotes its retention on the outer mitochondrial membrane.
Junyi Yang, Guoruiyu Lyu, Wenlong Wan, Dongfeng Yuan, Jiabo Li, Yongqi Wang, Baokang Wang, Zhilong Ma, Yuanyuan Yang, Yang Xun, Xiao Yu   +10 more
wiley   +1 more source

Advanced materials for uranium adsorption: a mini review of recent developments

Frontiers in Materials
Uranium contamination in water and soil poses serious risks to human health and ecosystems. Adsorption is a promising method for uranium removal due to its efficiency and simplicity.
Dan Liu, Yiyuan Wang, Liangzhou Zuo, Ming Guo, Shun Liu   +4 more
doaj   +1 more source