Table 3.

Areas of C1s components.

Bonds (%)	Untreated	Treated, 7 W/cm2	Treated with Nisin
C–C/C–H	41	31	21
C–N	34	36	19
C–O	13	15	47
C=O	12	2	2
N–C=O	0	5	11
O–C=O	0	11	0