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. 2016 Oct 10;17(10):1697. doi: 10.3390/ijms17101697

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© 2016 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 (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Effect of NaNO₃ concentration on gelation: (i) 0.1% NaNO₃; (ii) 0.5% NaNO₃; (iii) 1% NaNO₃; (iv) 3% NaNO₃; (v) 3.5% NaNO₃ and (vi) 4% NaNO₃; (b) Gelation time of SF solution according to NaNO₃ concentration. The red part indicates a non-gelated SF solution at a 4% NaNO₃ concentration.