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. 2016 Feb 9;6:21379. doi: 10.1038/srep21379

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(A) Pristine EPS. (B) EPS reacted with ZnONPs. (C) EPS reacted with SiO₂NPs. Baselines (dashed) were set according to the stretching band of the stable polysaccharide hydroxyl to compare the changes of other groups.