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. 2018 Jul 26;9:816. doi: 10.3389/fphar.2018.00816

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Copyright © 2018 Krychowiak, Kawiak, Narajczyk, Borowik and Królicka.

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) and the copyright owner(s) 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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Isobole curves depicting synergistic bactericidal effect of silver nanoparticles (AgNPs) and selected naphthoquinones toward Staphylococcus aureus strain ATCC 25923. (A) Combinatorial effect of 3-chloroplumbagin (3ChPL) and AgNPs; (B) combinatorial effect of plumbagin (PL) and AgNPs; (C) combinatorial effect of ramentaceone (RAM) and AgNPs; (D) combinatorial effect of 3ChPL and silver nitrate (AgNO₃).