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. 2021 Nov 1;12:761084. doi: 10.3389/fmicb.2021.761084

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Copyright © 2021 Lu, Zhang, Khan, Li and Wan.

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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(A) Antioxidant activity of the newly synthesized VBLE-MnO₂ NPs in comparison with V. betonicifolia leaves extract, CH-MnO₂ NPs, and external standard (Ascorbic acid). (B,C) Biocompatibility analysis of the newly synthesized VBLE-MnO₂ NPs with hMSC cells compared to the leaves extract of V. betonicifolia and CH-MnO₂ NPs.