Table 4. Response surface model equations for monitoring effects of independent variables on dependent variables for the production of seasoning base from sea mustard (
Undaria pinnatifida
) via extrusion cooking
Quadratic polynomial model equation
R
2
p
-value
Y
= 7.233 + 0.2561
X
1
+ 0.4018
X
2
– 0.4042
X
1
2
– 0.0042
X
2
2
– 0.3000
X
1
X
2
0.945
0.004
X
1
, barrel temperature (°C);
X
2
, screw speed (rpm);
Y
, overall acceptance (points).