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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Synthesis of SPIO Nanoparticles and the Subsequent Applications in Stem Cell Labeling for Parkinson’s Disease

Fig. 3

In vitro magnetic response of the synthesized USPIO-PAA and USPIO-PAA/PEG NPs. a, b MRI and transverse relaxation rate of USPIO-PAA NPs (a) and USPIO-PAA/PEG NPs (b). r2 represents relaxation rate. The relaxation rates of the USPIO-PAA and USPIO-PAA/PEG NPs were 107.94 s−1 mM−1 and 84.65 s−1 mM−1. c, d magnetic hysteresis loops of USPIO-PAA NPs (c) and USPIO-PAA/PEG NPs (d). The magnetic hysteresis was measured at 295 k (21.85 °C) with the maximal magnetic field intensity 50,000 Oe (5 Telsa). The saturation magnetization values were close to 57 emu/g for SPIO-PAA and 40 emu/g for SPIO-PAA/PEG. Magnetization hysteresis in both curves was close to zero

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