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The temperature rise of culture medium added with PEI-coated MNPs of 200 μg/mL in the case of applying an AC magnetic field for 30 min. The magnetic field intensity was 210, 230 and 250 Oe. The frequency of magnetic field was 210 kHz. The control indicates the sample added with nothing in the case of applying the AC magnetic field of 250 Oe. MNPs were effective in hyperthermia. The temperature rise depended on AC magnetic field intensity.
