*4.1.2 Preparation of material*

Fresh Thomson navel orange (*Citrus sinensis*) from northern Iran was used in this study. After the fruits were washed, they were juiced, and the separated pulp and peel were dried at ambient temperature for 2 weeks and then they were grinded. Those particles being sized as 60.85–0.180 mm (20–80 mesh) were collected and kept in sealed plastic bags for further analysis at room temperature. The prepared orange peel and pulp contained 92.6 and 93.6% total solids (TS) and 87.3 and 89.9% volatile solids (VS), respectively.
