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Fourier Transform Infrared Spectroscopy (FT-IR) spectra of SLNs and the GM-SLN vector. Black arrow points to the peak at around 1150 cm−1 present in the GM-SLN spectrum. Black square indicates the difference in the intensity of peak at 3500 cm−1 between the two spectra. Dashed square shows the displacement of bands at around 1700–1800 cm−1, probably indicating formation of hydrogen bonds. GM-SLN: galactomannan SLN-based vector. SLN: solid lipid nanoparticle.
