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. 2015 May 21;16(5):11629–11647. doi: 10.3390/ijms160511629

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© 2015 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 license (http://creativecommons.org/licenses/by/4.0/).

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SEM micrograph of ALGA produced at (a) LM/AA = 1.7 and Na₂SiO₃/NaOH = 0.4; (b) LM/AA = 1.8 and Na₂SiO₃/NaOH = 0.4; (c) LM/AA = 1.9 and Na₂SiO₃/NaOH = 0.4; (d) control samples.