Table 2.
Average content of total phenols (FC) and antioxidant capacity (FRAP and ABTS) for selected plant materials (see Table 1) with two biological replicates (n = 2). FC is shown in mmol GAE/100 g DW, FRAP is shown in mmol Fe2+/100 g DW and ABTS is shown in mmol TEAC/100 g DW. CV = coefficient of variation among cultivars. A different letter in a column indicates a significant difference (p < 0.05) among groups.
| Plant material | Cultivars | FC x̅ | CV% | FRAP x̅ | CV% | ABTS x̅ | CV% | |||
|---|---|---|---|---|---|---|---|---|---|---|
| Sea buckthorn leaves | n = 6 | 83.6 | a | 13.1 | 182.2 | a | 17.8 | 180.9 | a | 11.5 |
| Black currant leaves | n = 5 | 51.1 | b | 6.9 | 105.5 | b | 8.0 | 102.8 | b | 6.4 |
| Red currant leaves | n = 5 | 42.7 | bc | 9.2 | 86.0 | b | 12.1 | 83.8 | c | 11.6 |
| Onion peel | n = 3 | 25.4 | cd | 31.1 | 14.5 | c | 33.5 | 23.0 | e | 38.2 |
| Onion skin | n = 3 | 35.4 | d | 14.2 | 33.5 | c | 24.6 | 50.8 | d | 21.9 |
| Carrot leaves | n = 3 | 10.1 | e | 9.4 | 15.0 | c | 11.3 | 15.1 | e | 48.6 |
| Beetroot leaves | n = 3 | 10.2 | e | 11.2 | 9.8 | c | 23.1 | 9.3 | e | 21.6 |
| Olive mill waste water powder | n = 1 | 40.1 | – | NA | 102.3 | – | NA | 33.7 | NA |