Table 3.

Main effects of process parameters ((X₁, °C); (X₂, min); (X₃, pH)) and their combinations on the different responses and goodness of fit for the models.

Responses	Main Effects (p ≤ 0.05)	Lack of Fit (p ≥ 0.05)	R2
$\mathrm{Y}(\%)$	${\mathrm{X}}_3$ $,{\mathrm{X}}_3^2$ $, {\mathrm{X}}_1$	0.18	97.91
$\mathrm{DE}(\%)$	${\mathrm{X}}_3$ $, {\mathrm{X}}_1{\mathrm{X}}_3,{\mathrm{X}}_3^2$ $, {\mathrm{X}}_1^2$	0.63	99.55
$\mathrm{MeO}(\%)$	${\mathrm{X}}_3^2, {\mathrm{X}}_1{\mathrm{X}}_3, {\mathrm{X}}_1^2$	0.72	90.24
$\mathrm{AUA}(\%)$	${\mathrm{X}}_3$	0.54	92.62
$\mathrm{MM}\left(\mathrm{kDa}\right)$	${\mathrm{X}}_1,$ ${\mathrm{X}}_3^2,$ ${\mathrm{X}}_1^2$ $,{\mathrm{X}}_2$ $,{\mathrm{X}}_1{\mathrm{X}}_3, {\mathrm{X}}_1{\mathrm{X}}_2, {\mathrm{X}}_2^2$	0.72	99.31
$\mathrm{GalA}(\mathsf{\mu }\mathrm{g}/\mathrm{mg})$	${\mathrm{X}}_1,{\mathrm{X}}_3$	0.08	94.19
$\mathrm{Ara}(\mathsf{\mu }\mathrm{g}/\mathrm{mg})$	${\mathrm{X}}_3,$ ${\mathrm{X}}_1,$ ${\mathrm{X}}_2$ $,{\mathrm{X}}_1{\mathrm{X}}_3$ $,{\mathrm{X}}_2^2,$ ${\mathrm{X}}_3^2$	0.31	99.60
$\mathrm{Xyl}(\mathsf{\mu }\mathrm{g}/\mathrm{mg})$	${\mathrm{X}}_3$ $,{\mathrm{X}}_1{\mathrm{X}}_2,$ ${\mathrm{X}}_1{\mathrm{X}}_3,$ ${\mathrm{X}}_2{\mathrm{X}}_3$ $,{\mathrm{X}}_3^2$	0.22	98.26
$\mathrm{Rha}(\mathsf{\mu }\mathrm{g}/\mathrm{mg})$	${\mathrm{X}}_1, {\mathrm{X}}_3$	0.11	95.16
$\mathrm{Gal}(\mathsf{\mu }\mathrm{g}/\mathrm{mg})$	${\mathrm{X}}_3$	-	65.76

Y: yield; DE: degree of esterification; MeO: methoxyl content; AUA: anhydrouronic acid content; MM: molar mass.