Table 1. Mean values of the integrated area of each chemical component analyzed using Fourier Transform Infrared Spectroscopy (FTIR).

Irradiation	Amide I		PO v1 e v3		CO v3
	No pH cycling	pH cycling	No pH cycling	pH cycling	No pH cycling	pH cycling
Non-irradiated	0.148	0.359	8.630	13.237	1.307	0.912
Irradiated	0.167	0.346	8.788	13.197	1.356	0.743
Irradiated in fluoride	0.116	0.116	8.829	10.628	1.314	1.034