Figure 4.
Response surface plot showing the effects of poly ɛ-caprolactone (PCL) (X1) and polyvinyl alcohol (PVA) (X2) concentrations with an aqueous phase/organic phase (AP/OP) ratio of two on entrapment efficiency (Y1) (A) and particle size (Y2) (B); effect of PCL concentration (X1) and AP/OP volume ratio (X3) with a PVA concentration of 2% on entrapment efficiency (Y1) (C) and particle size (Y2) (D); effect of PVA concentration (X2) and AP/OP volume ratio (X3) with a PCL concentration of 2% on entrapment efficiency (Y1) (E) and particle size (Y2) (F).