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. 2009 May 11;9(5):3469–3490. doi: 10.3390/s90503469

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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. — Glucose oxidase activity as a function of storage time for bulk SiO₂ samples stored in PBS at 4°C (red dots) and in air at RT (green squares).