Table 6.
Effect of extraction method on phenolic content pecan shell extracts *.
| Sample | Protocatechuic | Gallic | Catechin | Vanillic | Caffeic | Syringic | Ferulic | Taxifolin | Elagic | Thymol |
|---|---|---|---|---|---|---|---|---|---|---|
| F150 | 3.7 ± 0.3 f | 1.6 ± 0.6 h | 1.5 ± 0.1 f | 4.4 ± 0.2 e | 2.9 ± 0.3 f | 1.6 ± 0.1 gh | 8.8 ± 0.2 e | n.d. | 6.5 ± 1.9 i | n.d. |
| F125 | 3.87 ± 0.02 f | 20.3 ± 0.5 bc | 25.5 ± 0.3 a | 4.4 ± 0.2 e | 5.7 ± 0.2 b | 0.6 ± 0.1 j | 19.1 ± 0.5 b | 8.25 ± 0.04 b | 87.3 ± 0.1 b | 0.15 ± 0.01 cd |
| F100 | 7.7 ± 0.1 d | 12.6 ± 0.1 e | 25.2 ± 0.8 a | 4.401 ± 0.001 e | 3.5 ± 0.1 ef | 1.070 ± 0.001 i | n.d. | 4.9 ± 0.2 g | 96.0 ± 1.4 a | 0.28 ± 0.03 bc |
| F80 | 4.5 ± 0.2 f | 12.8 ± 0.2 e | 21.4 ± 0.5 b | 4.1 ± 0.1 ef | 4.4 ± 0.1 d | 0.490 ± 0.001 j | 7.85 ± 0.08 e | 5.49 ± 0.02 f | 74.7 ± 0.5 c | n.d. |
| FSON | 0.83 ± 0.05 h | 9.1± 0.5 g | 16.269 ± 0.001 cd | 3.998 ± 0.001 ef | 3.3 ± 0.2 ef | 1.268 ± 0.001 hi | n.d. | 6.20 ± 0.02 e | 50.5 ± 5.2 ef | n.d. |
| FMIC | 1.72 ± 0.06 g | 15.8 ± 0.3 d | 21.7 ± 0.6 b | 3.8 ± 0.1 f | 4.5 ± 0.2 cd | 1.786 ± 0.001 g | n.d. | 6.4 ± 0.1 d | 57.5 ± 1.2 de | n.d. |
| S150 | 17.8 ± 0.2 a | 41.6 ± 1.1 a | 24.8 ± 0.1 a | 12.031 ± 0.001 a | 3.706 ± 0.001 e | 10.7 ± 0.2 a | 8.1 ± 0.2 e | 2.21 ± 0.01 i | 51.8 ± 1.2 e | n.d. |
| S125 | 7.92 ± 0.09 d | 14.35 ± 0.01 de | 17.7 ± 0.4 c | 6.6 ± 0.2 c | 5.3 ± 0.2 b | 4.430 ± 0.001 d | 6.21 ± 0.04 f | 2.82 ± 0.03 h | 43.7 ± 1.0 f | n.d. |
| S100 | 10.1 ± 0.5 b | 21.9 ± 0.3 b | 21.6 ± 0.7 b | 7.7 ± 0.1 b | 5.3 ± 0.1 b | 8.2 ± 0.1 b | 14.4 ± 0.3 c | 7.61 ± 0.05 c | 59.7 ± 0.6 d | n.d. |
| S80 | 6.10 ± 0.05 e | 10.9 ± 0.1 f | 17.4 ± 0.4 cd | 6.8 ± 0.2 c | 5.274 ± 0.001 b | 2.6 ± 0.1 f | 13.1 ± 0.6 d | 4.98 ± 0.01 g | 35.3 ± 0.2 g | n.d. |
| SSON | 6.6 ± 0.2 e | 10.51 ± 0.07 fg | 11.3 ± 0.2 ed | 6.1 ± 0.1 d | 7.1 ± 0.3 a | 3.010 ± 0.001 e | 20.8 ± 0.3 a | 9.30 ± 0.01 a | 25.6 ± 0.2 h | 0.5 ± 0.2 a |
| SMIC | 8.93 ± 0.01 c | 19.4 ± 0.3 c | 15.6 ± 0.7 d | 8.2 ± 0.2 b | 5.1 ± 0.1 bc | 5.3 ± 0.1 c | 15.2 ± 0.4 c | 9.16 ± 0.05 a | 53.2 ± 0.2d e | 0.41 ± 0.01 ab |
* See Table 5 for the sample codes. Means in the same column with the same letter are not significantly different (Tukey’s HSD test, p > 0.05). Data are presented as mean ± standard deviation.