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. 2021 Jan 13;8(1):200639. doi: 10.1098/rsos.200639

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© 2021 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 8. — SEM images of specimens in different pH samples: (a) at pH 4, (b) at pH 5, (c) at pH 6, (d) at pH 7.4 and EDX spectra of specimens in different pH samples: (e) at pH 4, (f) at pH 5, (g) at pH 6, (h) at pH 7.4.