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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/).
(a) IR-spectra of native hyaluronic acid (HA) (black) and low molecular weight oxidized hyaluronic acid (LMW-AHA-0.5) (orange) with a zoom to the shoulder at 1730 cm−1; (b) Average of degree of oxidation (DO) according to equivalents of NaIO4 used, referred to one dimer unit of HA.