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Attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR) of the formulations: F1 (CS:PVA:ox-CNO 30.00:70.00:0); F2 (CS:PVA:ox-CNO 29.50:70.00:0.50); F3 (CS:PVA:OX-CNO 29.00:70.00:1.00); F4 (CS:PVA:CS-g-CNO 29.50:70.00:0.50); and F5 (CS:PVA:CS-g-CNO 29.00:70.00:1.00).
