Fig. 4From: Lyophilized Hybrid Nanostructured Lipid Carriers to Enhance the Cellular Uptake of Verapamil: Statistical Optimization and In Vitro EvaluationResponse surface plot depicting the significant (p < 0.05) effect of liquid lipid concentration, surfactant concentration, and interactions between a BD and b CD on the ZP of HVD-NLCs. B solid lipid, C liquid lipid, D surfactantBack to article page