Effect of storage temperature and duration on antioxidant properties of hog plum juice during ambient and refrigerated storage
| Storage temperature | Duration of storage (weeks) | Ascorbic acid (mg/mL) | TPC (mg GAE/mL) | TFC (mg QE/mL) | TCC (mg/mL) | LYC (mg/mL) |
|---|---|---|---|---|---|---|
| 4 ± 2°C | 0 | 0.45 ± 0.01a | 3.9 ± 0.09a | 1.1 ± 0.03a | 4.0 ± 0.04a | 1.3 ± 0.05a |
| 2 | 0.41 ± 0.01ab | 3.9 ± 0.02a | 1.1 ± 0.04a | 3.9 ± 0.02a | 1.3 ± 0.02a | |
| 4 | 0.37 ± 0.01ab | 3.6 ± 0.04ab | 0.9 ± 0.01b | 3.5 ± 0.03ab | 0.43 ± 0.03c | |
| 6 | 0.31 ± 0.02b | 2.4 ± 0.05c | 0.76 ± 0.01 cd | 1.8 ± 0.03 cd | 0.31 ± 0.04 cd | |
| 8 | 0.25 ± 0.00c | 2.1 ± 0.02d | 0.27 ± 0.00e | 0.93 ± 0.02de | 0.3 ± 0.02 cd | |
| 26 ± 2°C | 0 | 0.45 ± 0.01a | 3.9 ± 0.09a | 1.1 ± 0.03a | 4.0 ± 0.04a | 1.3 ± 0.05a |
| 2 | 0.33 ± 0.02b | 3.3 ± 0.05b | 0.92 ± 0.01b | 2.8 ± 0.03b | 0.69 ± 0.02b | |
| 4 | 0.35 ± 0.00b | 2.4 ± 0.08c | 0.81 ± 0.02c | 2.0 ± 0.05c | 0.38 ± 0.01 cd | |
| 6 | 0.22 ± 0.01c | 2.3 ± 0.04c | 0.68 ± 0.01d | 1.3 ± 0.04d | 0.26 ± 0.01d | |
| 8 | 0.16 ± 0.01d | 1.7 ± 0.04e | 0.22 ± 0.01e | 0.78 ± 0.01e | 0.21 ± 0.01e |
| Storage | Duration of | Ascorbic acid | TPC | TFC | TCC (mg/mL) | LYC (mg/mL) |
|---|---|---|---|---|---|---|
| 4 ± 2°C | 0 | 0.45 ± 0.01a | 3.9 ± 0.09a | 1.1 ± 0.03a | 4.0 ± 0.04a | 1.3 ± 0.05a |
| 2 | 0.41 ± 0.01ab | 3.9 ± 0.02a | 1.1 ± 0.04a | 3.9 ± 0.02a | 1.3 ± 0.02a | |
| 4 | 0.37 ± 0.01ab | 3.6 ± 0.04ab | 0.9 ± 0.01b | 3.5 ± 0.03ab | 0.43 ± 0.03c | |
| 6 | 0.31 ± 0.02b | 2.4 ± 0.05c | 0.76 ± 0.01 cd | 1.8 ± 0.03 cd | 0.31 ± 0.04 cd | |
| 8 | 0.25 ± 0.00c | 2.1 ± 0.02d | 0.27 ± 0.00e | 0.93 ± 0.02de | 0.3 ± 0.02 cd | |
| 26 ± 2°C | 0 | 0.45 ± 0.01a | 3.9 ± 0.09a | 1.1 ± 0.03a | 4.0 ± 0.04a | 1.3 ± 0.05a |
| 2 | 0.33 ± 0.02b | 3.3 ± 0.05b | 0.92 ± 0.01b | 2.8 ± 0.03b | 0.69 ± 0.02b | |
| 4 | 0.35 ± 0.00b | 2.4 ± 0.08c | 0.81 ± 0.02c | 2.0 ± 0.05c | 0.38 ± 0.01 cd | |
| 6 | 0.22 ± 0.01c | 2.3 ± 0.04c | 0.68 ± 0.01d | 1.3 ± 0.04d | 0.26 ± 0.01d | |
| 8 | 0.16 ± 0.01d | 1.7 ± 0.04e | 0.22 ± 0.01e | 0.78 ± 0.01e | 0.21 ± 0.01e |
Values are means of duplicate samples, each analyzed in triplicates (n = 6) ± standard deviation. Means with different superscripts within the same column are significantly different at p < 0.05. TPC, total phenolic content; TFC, total flavonoid content; TCC, total carotenoid content; LYC, lycopene content
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