Table 4.
Maximum optimization values according to RSM.
| Variable | Setting | |||
|---|---|---|---|---|
| Time (A) (min) | 14 | |||
| Amplitude (B) (%) | 61.2 | |||
| Response (UT-GV) | Fit | SE Fit | 95% CI | 95% PI |
| TPC (mg GAE/100 mL) | 97.58 | 0.056 | (97.4447; 97.7095) | (97.3982; 97.7561) |
| TFC (mg CE/100 mL) | 12.20 | 0.004 | (12.1853; 12.2057) | (12.1817; 12.2093) |
| TAC (mg Cy-3-gly/100 mL) | 8.83 | 0.007 | (8.81751; 8.85173) | (8.81150; 8.85774) |
| AA (mg/100 mL) | 1.66 | 0.003 | (1.65730; 1.67088) | (1.65492; 1.67327) |
| DPPH (% Inhibition) | 54.26 | 0.157 | (53.884; 54.628) | (53.753; 54.758) |
| CUPRAC (% Inhibition) | 60.36 | 0.213 | (59.853; 60.861) | (59.675; 61.038) |
TPC: total phenolic content; TFC: total flavonoid content; TAC: total anthocyanin content; AA: ascorbic acid; DDPH: radical scavenging activity; CUPRAC: cupric reducing antioxidant capacity; GAE: gallic acid equivalent; CE: catechin equivalent; Cy-3-gly: cyanidin 3-O-glucoside; UT-GV: ultrasound-treated gilaburu vinegar.