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. 2020 Apr 1;25(7):1612. doi: 10.3390/molecules25071612

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© 2020 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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Modalities for system setup, syringe orientation, and stirring arrangements. Stir-drivers are shown in photographs with a levitated magnetic stirring bar. (A,B,D): Syringe in upright orientation, (C) Syringe used upside down. (A) Stirring induced by a closely placed motor with an attached bar magnet, (B) Stir-driver for the full stroke length of the syringe, (C,D) Stir-driver for fixed position. Upon turning the stir-drivers via a rubber ring and motor, they generate a rotating magnetic field around the syringe barrel. Abbreviations D—Detector, L—Light source, M—Motor, W—Waste.