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. 2017 Sep 7;7:10919. doi: 10.1038/s41598-017-11279-w

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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In vitro cell apoptosis by biaxial pulsed magnetic field. Optical image of HeLa cells and NiFe MNPs (a,b) no field control and (c,d) with magnetic field treatment. The cells (a,c) were stained with Trypan blue (TB) to obtain the dead cells count and (b,d) stained with Ethidium Bromide (EB) to observe apoptotic changes. (e) The quantified data from TB-stained and EB-positive fluorescent cells for frequencies between 1‒20 Hz. The error bars denote the standard deviation across four wells.