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Transmission electron microscopy of BM‐MSC labeled by silica‐coated MZF nanoparticles at 0.11 mM(Mn0.61Zn0.42Fe1.97O4) concentration. The nanoparticles were found in the cytoplasm outside the nucleus (A) and in composing clusters in membranous vesicles (B). The insert (a detailed view of the red‐bordered area) shows single particles formed by small clusters of Mn−Zn ferrite crystallites coated by an intact silica layer.
