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

Table 2

Band assignment of dry and soaked Chi-PgA-HAP films for 1660–1240 cm⁻¹ regions.

Band assignment	Band position as per the soaking conditions
	Dry	1 day	2 days	8 days	24-day	48-day
Amide I	1666	1665		1666	1665	1665
Asymmetric COO^- stretching	1622	1605	1624	1604	1605	1603
NH3^+ deformation	1534	1532	1534	1533	1534	1539
symmetric COO^- stretching	1414	1417	1418	1420	1416	1421
C–H bending vibration of ring	1330	1331	1329	1328	1332	1336
	1242	1245	1237	1244	1243	1246