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. 2021 Nov 18;13(11):1958. doi: 10.3390/pharmaceutics13111958

Figure 1.

Figure 1

UV-vis absorption spectra of native Hb (a) and HbNPs (b–e) fabricated with increasing Hb concentrations (i.e., 25, 50, 75 and 100 mg mL−1 for HbNPs-3, HbNPs-4, HbNPs-5 and HbNPs-6, respectively) before (red line) and after (green line) purging with nitrogen (N2) gas. The HbNPs were prepared using 12.5 mg mL−1 PLGA and 1% PVA.