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. 2009 Jul 14;10(7):3209–3223. doi: 10.3390/ijms10073209

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© 2009 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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Figure 7. — Inverted microscopy observations, 40X, after 63 days. Nitric and sulphuric acid treatment. A) Oma, B) C2. Without acid treatment: C) Navicula directa, observed on Ep. White bar: 10 μm.