Table 4.

Model coefficients and regression adjustment of mathematical models obtained by response surface methodology for lab-scale SFE

Effect on yield	Coefficients							P
	CE	HMDF	HMF	DMC	BA	UA	TSM	CE	HMDF	HMF	DMC	BA	UA	TSM
Intercept	1.760	2.190	0.610	12.210	9.91	4.01	29.20	0.005	0.005	0.004	0.000	0.002	0.076	0.001
X 1	0.370	0.780	0.190	4.040	6.53	1.81	13.36	0.006	0.000	0.000	0.000	0.000	0.005	0.000
X 2	0.190	−0.350	−0.095	−1.930	−3.79	0.14	−6.03	0.088	0.012	0.007	0.000	0.004	0.774	0.003
X 3	−7.50×10−3	0.160	0.021	1.250	−2.06	−0.33	−0.96	0.940	0.170	0.436	0.008	0.057	0.499	0.500
X 1 2	−0.880	−0.190	−0.053	−0.300	4.99	–0.17	4.14	0.000	0.231	0.182	0.551	0.005	0.793	0.062
X 2 2	−0.140	0.092	−0.015	−0.480	−0.50	0.30	−0.73	0.337	0.548	0.685	0.352	0.701	0.651	0.707
X 3 2	−0.390	−0.200	−0.042	−0.890	2.00	−1.39	−0.65	0.022	0.220	0.270	0.104	0.153	0.065	0.738
X 1 X 2	0.150	0.075	0.012	0.097	2.00	1.65	3.84	0.308	0.631	0.741	0.848	0.162	0.038	0.085
X 1 X 3	−2.50×10−3	0.130	0.045	0.560	0.41	0.16	1.31	0.985	0.404	0.560	0.293	0.757	0.816	0.518
X 2 X 3	–0.018	−0.035	−0.028	0.610	2.60	−0.27	2.87	0.901	0.821	0.475	0.257	0.082	0.691	0.178
R 2	0.916	0.913	0.916	0.963	0.934	0.798	0.948	−	−	−	−	−	−	−
R 2 adj	0.808	0.801	0.809	0.917	0.851	0.538	0.882	−	−	−	−	−	−	−

P value of <0.05 is considered significant. CE: crude extract