Comparison of FTIR signals of materials obtained from chicken bones and feet with signals of standard chitins, chondroitin sulfate (CS), and hyaluronic acid (HA).
The superscripts indicate the agreement of the analyzed signals with reference signals of chitin (a), CS (b), and HA (c). *: Mentioned in the paper but not observed in the spectrum. **: CO2 signal.
Declarations
Author contributions
CLV: Conceptualization, Investigation, Writing—original draft, Writing—review & editing. The author read and approved the submitted version.
Conflicts of interest
The author declares that there are no conflicts of interest.
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