In Situ Swelling Behavior of Chitosan-Polygalacturonic Acid/Hydroxyapatite Nanocomposites in Cell Culture Media

Table 1

Band assignment of dry and soaked Chi-PgA-HAP films for 3380–2860 cm⁻¹ regions.

Band assignment	Band position as per the testing conditions
	Dry	1 day	2 days	8 days	24-day	48-day
Asymmetric N–H stretching	3386	3377	3365	3365	3368	3360
symmetric N–H stretching	3290	3284	3292	3288	not observed	not observed
Asymmetric C–H stretching	2931	2936	2933	2932	2934	2933
Symmetric C–H stretching	2878	2878	2874	2878	2866	2869