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. 2012 Dec 20;14(1):17–29. doi: 10.3390/ijms14010017

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© 2013 by the authors; licensee Molecular Diversity Preservation International, 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/3.0/).

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SEM images of polyamine microsphere: (a) Image of an aggregation of microsphere; (b) Magnification of an intact microsphere; (c) Zoom-in image of the outer surface of microsphere; (d) Image of the microsphere obtained by reducing the adding amount of glutaraldehyde by half.

SEM images of polyamine microsphere: (a) Image of an aggregation of microsphere; (b) Magnification of an intact microsphere; (c) Zoom-in image of the outer surface of microsphere; (d) Image of the microsphere obtained by reducing the adding amount of glutaraldehyde by half.