Abstract
Mössbauer spectra of ferritin and its pharmaceutical analogue Ferrum Lek, both containing nanosized hydrous ferric oxides cores in the forms of ferrihydrite and akaganéite, respectively, were measured in the temperature range 295–90 K. An anomalous line broadening with temperature decrease was observed for ferritin below ~150 K and for Ferrum Lek below ~130 K. Some anomalies were also observed below these temperatures for spectral area and quadrupole splitting.
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Acknowledgments
The authors wish to thank Prof. P.G. Prokopenko (Department of Biochemistry, Russian State Medical University, Moscow) for providing the human liver ferritin and Prof. S.M. Dubiel (Faculty of Physics & Applied Computer Science, AGH University of Science & Technology, Kraków) for providing the Ferrum Lek sample. This work was supported in part by the basic financing from the Ministry of Education and Science of Russian Federation and OTKA No 111692. I.V.A. is supported in part by the Ural Federal University development program for the young scientists’ financial support. This work was carried out within the Agreement of Cooperation between the Ural Federal University (Ekaterinburg) and the Eötvös Loránd University (Budapest).
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Oshtrakh, M.I., Alenkina, I.V., Kuzmann, E. et al. Anomalous Mössbauer line broadening for nanosized hydrous ferric oxide cores in ferritin and its pharmaceutical analogue Ferrum Lek in the temperature range 295–90 K. J Nanopart Res 16, 2363 (2014). https://doi.org/10.1007/s11051-014-2363-9
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DOI: https://doi.org/10.1007/s11051-014-2363-9