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. 2017 Feb 16;19(2):71. doi: 10.1007/s11051-017-3756-3

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© The Author(s) 2017

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided 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.

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Fig. 3 — Evaluation of nanoparticle stability in terms of a average diameter and b ζ-potential variation over time in preparation media (pH 5.5) and physiological solution (pH 7.4) at room temperature. c Swelling percentages for CS-SPLA in different media. Simulated gastric fluid (SGF, pH 2), preparation media (PM, pH 5.5), and PBS (phosphate buffer, pH 7.4)