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. 2014 Sep 24;7(9):6865–6878. doi: 10.3390/ma7096865

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© 2014 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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The fluorescence microscopy images of HepG2 cells after DAPI dyeing. (A) HepG2 cells; (B) HepG2 cells treated with 0.5 µg/mL GA; (C) HepG2 cells treated with 5.0 µg/mL TiO₂ nanofibers after UV irradiation; (D) HepG2 cells treated with GA-TiO₂ nanocomposites after UV irradiation. Scale bar: 20 µm.