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. 2023 Jun 30;12(27):2301033. doi: 10.1002/adhm.202301033

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© 2023 The Authors. Advanced Healthcare Materials published by Wiley‐VCH GmbH

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Adhesion and erosion test of alginate‐dopamine pills. A) Schematic representation of the experimental washing setup. B) Photographs of alginate‐dopamine pills (ALG‐DA) and alginate‐calcium pills (ALG‐Ca) adhesion performance after water flushing within 10 s. C) Retention time of ALG‐DA pills and ALG‐Ca pills on small intestine after water flushing, n = 30. D) Photographs of the erosion of ALG‐DA pills and alginate (ALG) pills on small intestine over time. Graphite is added in the ALG pills in order to investigate the erosion process (dark color). E) The pills sizes change ALG‐DA pills and ALG pills after water flushing for 30 min. Data is represented as mean ± S.D., n = 4.