Response Surface Optimisation for the Production of Antioxidant Hydrolysates from Stone Fish Protein Using Bromelain

Table 2

Regression coefficients, and -test probability for DH, DPPH^• scavenging activity, and Fe²⁺-chelating activity.

Factors	Coefficients
		value		value		value
Intercept	−116.530	0.000	−341.992	0.000	43.4458	0.005
	47.132	0.000	79.148	0.000	−51.8738	0.000
	0.151	0.003	6.735	0.000	3.3275	0.000
	29.774	0.000	−4.769	0.000	38.9285	0.000
	0.105	0.000	−0.103	0.000	−0.0010	0.709
	4.226	0.000	−7.041	0.000	4.7686	0.000
	−0.001	0.800	−0.063	0.000	−0.0310	0.000
	−8.371	0.000	−1.484	0.487	−13.7613	0.000
	−0.000	0.000	0.000	0.000	0.0001	0.077
	−1.024	0.016	0.229	0.592	0.2378	0.573
	−0.000	0.010	−0.000	0.222	0.0001	0.671
	0.026	0.000	0.006	0.114	0.0018	0.635
(-sqd)	98.50%		98.14%		90.170%
-adj	97.74%		97.57%		87.17%
Lack of fit		0.076		0.176		0.146
-values	131.01	0.000	173.28	0.000	30.12	0.000