Research Article

Development and Characterization of Stingless Bee Propolis Properties for the Development of Solid Lipid Nanoparticles for Loading Lipophilic Substances

Figure 5

Physical properties of each surfactant. (a) Cremophor WO7, (b) Myrj 52, (c) Brij 721, (d) Tween 80, and (e) Poloxamer 188 (surfactant concentration 10%, 20%, and 30%).