Investigation of the oxidation states of Pu isotopes in a hydrochloric acid solution

Lee, M.H.; Kim, J.Y.; Kim, W.H.; Jung, Euo Chang; Jee, Kwang Yong

doi:10.1016/j.apradiso.2008.06.023

Cited by 13 publications

(1 citation statement)

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“…The Pu stock solutions were characterized to ensure that no hydrolysis occurred. The spectra of each Pu(IV) stock solution (in carbonate, chloride, and nitrate media) shown in Figures and are consistent with the literature data. ,− Upon introduction of Pu(IV) into the CaME or CaMWT samples, a change in the Pu absorption bands was evident, indicating a change in the Pu coordination sphere (Figures and ). The same experiment was conducted without peptide, by adding Pu carbonate solution to MES buffer alone.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Plutonium(IV) Interactions with Two Variants of the EF-Hand Ca-Binding Site I of Calmodulin

Daronnat,

Holfeltz,

Boubals

et al. 2023

Inorg. Chem.

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Due to its presence in the nuclear industry and its strong radiotoxicity, plutonium is an actinide of major interest in the event of internal contamination. To improve the understanding of its mechanisms of transport and accumulation in the body, the complexation of Pu(IV) to the most common protein calcium-binding motif found in cells, the EF-hand motif of calmodulin, was investigated. Visible and X-ray absorption spectroscopies (XAS) in solution made it possible to investigate the speciation of plutonium at physiological pH (pH 7.4) and pH 6 in two variants of the calmodulin Ca-binding site I and using Pu(IV) in different media: carbonate, chloride, or nitrate solutions. Three different species of Pu were identified in the samples, with formation of 1:1 Pu(IV):calmodulin peptide complexes, Pu(IV) reduction, and formation of peptide-mediated Pu(IV) hexanuclear cluster.

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Section: Resultsmentioning

confidence: 99%