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. 2019 Aug 16;9(8):1175. doi: 10.3390/nano9081175

Figure 1.

Figure 1

Scanning electron microscopy (SEM) images and size distributions of commercially available food additive TiO2 (T1–T5) and general-grade bulk and nano TiO2 (bulk and nano). Size distributions were obtained by randomly selecting 100 particles from the SEM images.