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. 2019 Jan 21;20(2):449. doi: 10.3390/ijms20020449

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© 2019 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Disk diffusion assay results for AgNPs of various sizes against E. coli. The zone of inhibition is highlighted with a dashed circle indicating a noticeable antibacterial effect. Reproduced from [41], the Royal Society of Chemistry.