Fig. 4From: Pterocarpus marsupium Roxb. heartwood extract synthesized chitosan nanoparticles and its biomedical applicationsFT-IR spectrums of aPterocarpus marsupium (PM) aqueous stem bark extract, b chitosan nanoparticles (CNPs), and cPterocarpus marsupium-loaded chitosan nanoparticles (PM-CNPs)Back to article page