Table 5.

Central Composite Rotatable Design (CCRD) results (F_calc and F_tab represent the calculated and tabulated F distribution at a 5% significance, respectively).

Response Variables	Model	r2	p-Value	Fcalc	Ftab
Sol	$\mathit{Sol}=67.06+12.55{ \mathit{Al}}^2+10.44{ \mathit{PC}}^2$	0.6785	0.01069	8.4	4.46
MC	$\mathit{MC}=59.02+12.74 \mathit{Al}$	0.8763	0.00002	63.8	5.12
WVP	NA	NA	0.48726	1.0	5.05
CA	NA	NA	0.31137	1.6	5.05
Tg	NA	NA	0.76410	0.5	5.05
YM	$\mathit{YM}=0.31+4.32 \mathit{Al}+3.35{ \mathit{Al}}^2$	0.9685	0.00001	122.9	4.46
OP	$\mathit{OP}=12.04+1.41 \mathit{Al} -2.17{\mathit{Al}}^2 -1.92{\mathit{PC}}^2$	0.7789	0.01077	8.2	4.35
TGAp	NA	NA	0.76415	0.5	5.05
TS	$\mathit{TS}=1+5.90 \mathit{Al}+4.50{ \mathit{Al}}^2$	0.8852	0.00017	30.9	4.46
EB	$\mathit{EB}=12.92 -6.89{\mathit{Al}}^2$	0.7859	0.00028	33.0	5.12

Abbreviations: Al, alginate; PC, phenolic compounds; Sol, solubility; MC, moisture content; WVP, water vapor permeability; CA, contact angle; T_g, glass transition temperature; YM, Young Modulus; OP, opacity; TGAp, TGA peak; TS, tensile strength; EB, elongation at break; NA, not applicable.