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. 2023 Feb 26;15(3):771. doi: 10.3390/pharmaceutics15030771

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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DOX release from Fe₃O₄@CaCO₃/DOX with capacity from 25 to 1900 µg/mg at pH 5.0 (A,B) and pH 7.4 (C,D) at 25 °C. DOX release from Fe₃O₄@CaCO₃/DOX with capacity 1045 µg/mg at pH 4.0–7.4 at 25 °C (E,F).