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

Table 2

ANOVA of response surface quadratic model for extraction yield of essential oil from Chimonanthus nitens Oliv.

Variables	Sun of squares	df	Mean square	value	value
Model	0.031	9	0.003427	48.81	<0.0001	Significant
	0.006105	1	0.006105	86.94	<0.0001
	0.003698	1	0.003698	52.66	0.0002
	0.0006661	1	0.0006661	9.49	0.0178
	0.00001225	1	0.00001225	0.17	0.6887
	0.000036	1	0.000036	0.51	0.4972
	0.00000625	1	0.00000625	0.089	0.7741
	0.0009664	1	0.0009664	13.76	0.0076
	0.006209	1	0.006209	88.42	<0.0001
	0.011	1	0.011	163.07	<0.0001
Residual	0.0004916	7	0.00007022
Lack of fit	0.0001548	3	0.00005158	0.61	0.6418	Not significant
Pure error	0.0003368	4	0.0000842
	0.9843
Adj	0.9641
C.V. %	0.56
Adep precision	19.048
Cor total	0.031	16