Table 2.

P-values for the effect of time and temperature of extraction and their interaction on the yield α,β-carotenes from response surface regression.

Factors	β-carotene	α-carotene
	p-values
Time	0.004	<0.001
Temperature	0.002	0.001
Time x Temperature	0.006	0.002
R2 a (%)	89.5	94.5

^a explained variance by the model are given as R²%.