Synthesis and optimization ring opening of monoepoxide linoleic acid using p-toluenesulfonic acid

SpringerPlus

Table 2 Regression coefficients of the predicted quadratic polynomial model for the response variables of the OOC% of HYOOA

Variables	Coefficients (ß), OOC% (Y₁)	T	P	Notability
Linear
X ₁	0.23	1.18	0.3023
X ₂	0.16	0.50	0.4970
X ₃	-0.64	9.15	0.0128	**
X ₄	0.24	1.15	0.3088
Quadratic
X ₁₁	-1.92	13.10	0.0047	***
X₂₂	1.17	4.75	0.0544
X₃₃	-0.56	1.31	0.2790
X₄₄	-2.386E-003	3.722E-005	0.9953
Interaction
X₁₂	-0.91	14.95	0.0031	***
X₁₃	-0.23	0.87	0.3725
X₁₄	-0.53	5.20	0.0457	**
X₂₃	-0.072	0.095	0.7642
X₂₄	0.33	1.89	0.1988
X₃₄	0.54	5.14	0.0468	**
R²	0.81

Notes: X ₁ = OA/MEOA ratio; X ₂ = PTSA/MEOA ratio; X ₃ = reaction temperature; X ₄ = reaction time. ** P < 0.05; *** P < 0.01. T: F test value See Table 1 for a description of the abbreviations.