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. 2017 Mar 8;7:43661. doi: 10.1038/srep43661

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(a) The lock-in current of the sensor in a frequency sweep ranging from 110 MHz to 120 MHz detected continuously for 48 hours. (b) The detected lock-in current changing over time at certain frequency, where different phases of cell cycle are indicated. (c–h) SEM images of living Hela cells rapidly frozen at different phases of cell cycles: (c) Initial drop, (d) Attachment, (e) Spread, (f) 16 h, (g) Mitosis in the first cycle and (h) Interphase in the third cycle. The phases in (c–h) correspond to the time points marked as stars in (b) respectively.