Figure 4

Isoplots for adjusted variables the Box-Behnken optimal design: (A) Moisture content for Formulation A, (B) Moisture content for Formulation B, (C) water activity for Formulation A, and (D) water activity for formulation B. Obtained from: Design Expert Software Version 10.1.0 (Stat-Ease Inc., MN, USA, https://www.statease.com/software/design-expert/ ).