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. 2011 Sep 5;11(9):8611–8625. doi: 10.3390/s110908611

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© 2011 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/3.0/).

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Figure 7. — Assessing the quality of engine oil by conductometric sensors covered with DEAMTES, and APTES layers and compared with uncoated interdigital transducer behavior.