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. 2017 Mar 27;7(2):15. doi: 10.3390/life7020015

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© 2017 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 typical ESI-MS (electrospray ionisation mass spectrometry) spectra of the products that formed when glycine (a) and alanine; (b) were heated for 35 days at 90 °C in the presence of NiFe₂O₄.