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. 2018 Jul 18;23(7):1759. doi: 10.3390/molecules23071759

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© 2018 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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Schematic laboratory apparatus for continuous extraction: (1) water bath, (2) fresh solvent vessel, (3) peristaltic pumps, (4) extraction column, (5) column jacket, (6) extraction outlet, (7) condenser.