TABLE 3.
Effect of naturally derived preservatives and storage period on TPC, TFC, AA content and antioxidant activity (DPPH and FRAP) of SCJ
| Quality attribute | Treatments | Storage intervals (Days) | |||
|---|---|---|---|---|---|
| 0 | 7 | 14 | 21 | ||
| Total phenolic content (mg GAE/ml) | Control | 3.96 ± 0.02 a | 3.65 ± 0.04 b | 3.38 ± 0.02 c | 2.65 ± 0.03 d |
| AE 3% | 4.10 ± 0.03 a | 4.06 ± 0.03 b | 3.98 ± 0.03 bc | 3.78 ± 0.04 c | |
| AE 5% | 4.32 ± 0.01 a | 4.28 ± 0.06 a | 4.22 ± 0.05 ab | 4.15 ± 0.01 b | |
| AE 7% | 4.45 ± 0.05 a | 4.42 ± 0.01 a | 4.37 ± 0.03 ab | 4.25 ± 0.02 c | |
| ME 3% | 4.32 ± 0.02 a | 4.28 ± 0.04 ab | 4.22 ± 0.02 b | 4.10 ± 0.03 c | |
| ME 5% | 4.46 ± 0.03 a | 4.46 ± 0.03 a | 4.44 ± 0.05 a | 4.4 ± 0.02 b | |
| ME 7% | 4.68 ± 0.01 a | 4.66 ± 0.01 a | 4.63 ± 0.03 ab | 4.51 ± 0.05 b | |
| Total flavonoids compounds (mg CE/ml) | Control | 3.52 ± 0.03 a | 3.47 ± 0.04 b | 3.36 ± 0.03 c | 3.29 ± 0.04 d |
| AE 3% | 3.62 ± 0.01 a | 3.56 ± 0.03 ab | 3.48 ± 0.04 b | 3.39 ± 0.03 c | |
| AE 5% | 3.69 ± 0.04 a | 3.69 ± 0.01 a | 3.69 ± 0.01 a | 3.62 ± 0.05 ab | |
| AE 7% | 3.76 ± 0.02 a | 3.74 ± 0.04 a | 3.69 ± 0.02 b | 3.64 ± 0.01 bc | |
| ME 3% | 3.74 ± 0.03 a | 3.69 ± 0.03 ab | 3.62 ± 0.05 b | 3.54 ± 0.02 c | |
| ME 5% | 3.81 ± 0.05 a | 3.80 ± 0.01 a | 3.77 ± 0.06 a | 3.71 ± 0.04 ab | |
| ME 7% | 3.91 ± 0.01 a | 3.90 ± 0.03 a | 3.87 ± 0.03 ab | 3.76 ± 0.03 b | |
| Ascorbic acid (mg/100 ml) | Control | 0.61 ± 0.02 a | 0.56 ± 0.02 b | 0.44 ± 0.03 c | 0.31 ± 0.03 d |
| AE 3% | 0.84 ± 0.04 a | 0.78 ± 0.03 ab | 0.67 ± 0.01 c | 0.55 ± 0.01 d | |
| AE 5% | 0.92 ± 0.01 a | 0.88 ± 0.01 a | 0.83 ± 0.05 ab | 0.76 ± 0.05 b | |
| AE 7% | 1.04 ± 0.03 a | 0.99 ± 0.05 a | 0.89 ± 0.02 b | 0.8 ± 0.033 bc | |
| ME 3% | 0.73 ± 0.04 a | 0.69 ± 0.02 ab | 0.58 ± 0.03 b | 0.47 ± 0.03 c | |
| ME 5% | 0.79 ± 0.02 a | 0.78 ± 0.04 a | 0.74 ± 0.04 ab | 0.69 ± 0.02 b | |
| ME 7% | 0.86 ± 0.03 a | 0.83 ± 0.01 a | 0.76 ± 0.01 ab | 0.69 ± 0.01 b | |
| DPPH (%) | Control | 78.38 ± 0.04 a | 74.23 ± 0.01 ab | 67.82 ± 0.03 b | 57.89 ± 0.05 c |
| AE 3% | 86.67 ± 0.02 a | 82.34 ± 0.01 ab | 77.45 ± 0.02 b | 66.04 ± 0.03 c | |
| AE 5% | 91.45 ± 0.05 a | 89.23 ± 0.04 a | 86.56 ± 0.01 ab | 82.45 ± 0.03 b | |
| AE 7% | 95.23 ± 0.01 a | 92.98 ± 0.06 a | 87.67 ± 0.03 ab | 81.56 ± 0.04 b | |
| ME 3% | 89.78 ± 0.02 a | 83.56 ± 0.03 ab | 78.98 ± 0.05 ab | 70.51 ± 0.03 b | |
| ME 5% | 93.31 ± 0.06 a | 92.56 ± 0.01 a | 89.34 ± 0.04 a | 85.08 ± 0.04 ab | |
| ME 7% | 96.45 ± 0.03 a | 93.27 ± 0.05 ab | 90.13 ± 0.02 ab | 84.87 ± 0.01 b | |
| FRAP (%) | Control | 77.12 ± 0.05 a | 73.98 ± 0.03 ab | 66.12 ± 0.01 b | 56.12 ± 0.02 c |
| AE 3% | 83.23 ± 0.03 a | 81.02 ± 0.02 ab | 75.34 ± 0.07 b | 67.34 ± 0.05 bc | |
| AE 5% | 86.23 ± 0.01 a | 84.13 ± 0.05 a | 82.34 ± 0.02 a | 79.23 ± 0.02 ab | |
| AE 7% | 90.34 ± 0.03 a | 86.45 ± 0.01 a | 81.45 ± 0.04 ab | 78.67 ± 0.01 ab | |
| ME 3% | 84.12 ± 0.02 a | 81.23 ± 0.04 ab | 76.89 ± 0.01 b | 68.78 ± 0.03 bc | |
| ME 5% | 88.78 ± 0.03 a | 86.56 ± 0.05 a | 83.45 ± 0.03 ab | 79.67 ± 0.01 b | |
| ME 7% | 93.64 ± 0.02 a | 89.13 ± 0.01 a | 85.34 ± 0.05 ab | 79.01 ± 0.04 b | |
Mean value ± SD of triplicates. Values in the same row with different letters are significantly different (p < .05).