Table 3.
Antioxidant activity of Cotoneaster polyphenols in chemical models.
| Analyte | Radical Scavenging Activity DPPH a | Reducing Power b | LA-Peroxidation TBARS c | ||||||
|---|---|---|---|---|---|---|---|---|---|
| SC50 | TE | FRAP | TE | IC50 | TE | ||||
| µg/mL | µmol/L | mmol TE/g | mmol Fe2+/g | mol/mol | mmol TE/g | µg/mL | µmol/L | mmol TE/g | |
| CHA | 4.60 ± 0.07 G | 12.97 ± 0.21 F | 3.51 ± 0.05 B,C | 25.68 ± 0.49 E | 9.10 ± 0.18 E | 9.75 ± 0.26 G | 2.49 ± 0.01 A,B | 6.83 ± 0.08 D | 13.65 ± 0.19 G,H |
| PB2 | 2.46 ± 0.03 B | 4.25 ± 0.05 B | 6.57 ± 0.08 G | 32.64 ± 0.80 F | 18.89 ± 0.47 H | 12.63 ± 0.37 H | 2.56 ± 0.18 A,B | 4.43 ± 0.32 B | 13.28 ± 0.95 G,H |
| ECA | 2.35 ± 0.10 B | 8.08 ± 0.50 E | 6.89 ± 0.41 G,H | 35.79 ± 0.93 G | 10.39 ± 0.27 F | 13.97 ± 0.43 H | 2.25 ± 0.19 A | 7.73 ± 0.66 E | 15.16 ± 1.29 H |
| PC1 | 2.55 ± 0.11 B | 2.94 ± 0.09 A | 6.34 ± 0.28 G | 21.08 ± 0.80 C | 18.27 ± 0.06 H | 7.35 ± 0.37 D,E | 2.91 ± 0.08 A,B | 3.35 ± 0.09 A | 11.68 ± 0.31 F,G |
| CAD | 3.76 ± 0.11 E | 12.47 ± 0.37 F | 4.38 ± 0.13 D,E | 22.31 ± 1.22 C,D | 6.61 ± 0.36 C | 7.76 ± 0.56 E,F | 3.53 ± 0.28 B,C | 11.90 ± 0.93 G | 9.65 ± 0.76 E,F |
| QPH | 5.09 ± -0.08 H | 8.54 ± 0.14 E | 3.18 ± 0.05 B | 15.71 ± 0.20 B | 9.37 ± 0.12 E | 5.98 ± 0.13 C,D | 5.00 ± 0.24 D,E,F | 8.39 ± 0.40 E | 6.79 ± 0.33 C,D |
| RT | 4.44 ± 0.05 G | 7.27 ± 0.08 D | 3.64 ± 0.04 B,C | 15.68 ± 0.62 B | 9.57 ± 0.38 E | 5.79 ± 0.32 C | 6.01 ± 0.46 F | 9.84 ± 0.75 F | 5.66 ± 0.43 B,C |
| HP | 3.42 ± 0.07 C,D,E | 7.83 ± 0.16 D | 4.73 ± 0.10 E,F | 20.64 ± 0.02 C | 9.01 ± 0.01 E | 7.87 ± 0.08 E,F | 5.43 ± 0.62 E,F | 12.55 ± 1.28 G | 6.29 ± 0.72 C,D |
| IQ | 3.55 ± 0.08 D,E | 8.12 ± 0.21 E | 4.56 ± 0.10 D,E | 19.69 ± 0.27 C | 8.59 ± 0.06 D | 7.37 ± 0.11 D,E | 5.89 ± 0.09 F | 13.50 ± 0.36 H | 5.76 ± 0.09 B,C |
| QR | 3.31 ± 0.03 C,D | 7.39 ± 0.08 D | 4.88 ± 0.05 E,F | 20.26 ± 0.36 C | 9.08 ± 0.16 E | 7.78 ± 0.17 E,F | 4.15 ± 0.10 C,D | 9.04 ± 0.52 F | 8.18 ± 0.20 D,E |
| QU | 1.85 ± 0.11 A | 6.31 ± 0.33 C | 8.74 ± 0.07 H | 46.24 ± 1.66 H | 13.98 ± 0.50 G | 18.10 ± 0.99 I | 1.76 ± 0.06 A | 5.89 ± 0.29 C | 19.28 ± 0.62 I |
| TX | 4.06 ± 0.11F | 16.20 ± 0.42 G | 3.99 ± 0.10 C,D | 12.69 ± 0.42 B | 3.18 ± 0.11 A | 4.31 ± 0.19 B | 8.51 ± 0.74 G | 33.66 ± 2.48 J | 4.00 ± 0.35 A,B |
| AA | 3.13 ± 0.05 C | 17.63 ± 0.04 H | 5.17 ± 0.08 F | 25.26 ± 0.15 D,E | 4.45 ± 0.01 B | 9.19 ± 0.01 F,G | 4.59 ± 0.27 C,D,E | 26.06 ± 0.80 I | 7.40 ± 0.43 C,D,E |
| MEB | 7.19 ± 0.32 I | - | 3.06 ± 0.14 A | 10.74 ± 0.07 A | - | 3.76 ± 0.03 A | 10.58 ± 0.32 H | - | 3.21 ± 0.10 A |
| MEZ | 7.44 ± 0.03 I | - | 2.96 ± 0.01 A | 9.42 ± 013 A | - | 3.15 ± 0.06 A | 11.43 ± 0.71 H | - | 2.97 ± 0.18 A |
Results are expressed as the means ± SD (n = 3). In each column, different superscript letters (A–J) indicate significant differences in the mean values (p < 0.05). Codification of the compounds is given in Figure 1 and Table 2. a Radical-scavenging efficiency expressed as effective concentration (SC50, amount of the analyte needed to decrease the initial DPPH concentration by 50%). b Ferric reducing antioxidant power. c Ability to inhibit linoleic acid peroxidation, monitored by the levels of thiobarbituric acid-reactive substances (TBARS) and expressed as IC50 (inhibitory concentration). TE, Trolox® equivalent antioxidant activity. Positive controls: QU, quercetin; TX, Trolox®; AA, ascorbic acid.