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. 2021 Dec 9;13(12):2126. doi: 10.3390/pharmaceutics13122126

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© 2021 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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SEM-images of the dried product layer of the BSA formulation for a high spin-freezing rate (panel A (cross-section) and C (surface)) and a low spin-freezing rate (panel B (cross-section) and D (surface)).