Extraction, Chemical Composition, and Protective Effect of Essential Oil from Chimonanthus nitens Oliv. Leaves on Dextran Sodium Sulfate-Induced Colitis in Mice

Table 1

Results of the BBD design for the extraction of essential oil from Chimonanthus nitens Oliv.

Run	Extraction time; (h)	Soaking time; (h)	Material-to-liquid ratio	The yield of EO; (%)
1	3	0	1 : 20	1.45
2	5	0	1 : 20	1.508
3	3	2	1 : 20	1.485
4	5	2	1 : 20	1.55
5	3	1	1 : 15	1.45
6	5	1	1 : 15	1.505
7	3	1	1 : 25	1.47
8	5	1	1 : 25	1.513
9	4	0	1 : 15	1.425
10	4	2	1 : 15	1.475
11	4	0	1 : 25	1.45
12	4	2	1 : 25	1.495
13	4	1	1 : 20	1.56
14	4	1	1 : 20	1.55
15	4	1	1 : 20	1.562
16	4	1	1 : 20	1.547
17	4	1	1 : 20	1.54