Source of variation1 Ascorbic acid content Antioxidant activity (ABTS)
Mean / Interception 1297.481 2127.168
P -0.829 0.498
T -15.442 43.555
t -1.548 -2.662
P2 (8.371 x 10-4) -
T2 0.139 -0.608
t2 (1.525 x 10-3) (5.518 x 10-3)
Pt (7.829 x 10-4) -(4.180 x 10-3)
1P=pressure. T=temperature. t=time.
Table 4: Significant regression coefficients of the quadratic model for ascorbic acid content and antioxidant activity of HHP treated orange juice.