Spray-Dried Microencapsulation of Oregano (Lippia graveolens) Polyphenols with Maltodextrin Enhances Their Stability during In Vitro Digestion

Table 2

Central composite design used to optimize the microencapsulation process of oregano (Lippia graveolens) extracts.

Run	Coded levels	Factor 1: temperature (°C)	Factor 2: wall material (%)
1	00	140	20
2	—	120	10
3	a0	111.7	20
4	0a	140	5.8
5	00	140	20
6	0A	140	34.1
7	00	140	20
8	-+	120	30
9	++	160	30
10	+-	160	10
11	00	140	20
12	00	140	20
13	A0	168.2	20

Factorial (+, -), axial (A, a), and central (0) runs.