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. 2019 Jan 17;11(1):35. doi: 10.3390/pharmaceutics11010035

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© 2019 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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Swelling index (⬤ AFA100, ⏹ AFA300) measured as the ratio between the weight of the swollen film and dry film vs. time. Values are presented as means ± SE (n = 6).