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. 2017 Jun 7;8:1013. doi: 10.3389/fmicb.2017.01013

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Copyright © 2017 Go, Bae, Kim, Yu and Choi.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Fluorescence quenching ratios of skim milk solution (1 mg/ml) in the presence of SiO₂ NPs with respect to NP concentrations at (A) 4°C, (B) 25°C, and (C) 40°C. Different letters in majuscule (A,B) and in minuscule (a–c) indicate significant differences between incubation times and between NP concentrations, respectively (p < 0.05). (C) No statistical differences between incubation times were found (p > 0.05).