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Fig. 3 | Nanoscale Research Letters

Fig. 3

From: Polymeric Nanoparticles of Brazilian Red Propolis Extract: Preparation, Characterization, Antioxidant and Leishmanicidal Activity

Fig. 3

Scanning electron microscopy of NRPE in different freeze-drying conditions. a, b Method A of drying at room temperature in freeze-drying (NRPE A2). c, d Method B of drying in freeze-drying (NRPE A21). e, f Method C of drying in freeze-drying using cryoprotectants: colloidal silicon dioxide e and sodium starch glycolate f of the NRPE A4 composition

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