Table 4.
Extract | Nondigested (µg/mL) | Stability 1 (%) | Solubility 2 (%) | Bioaccessibility 3 (%) |
---|---|---|---|---|
Catechin | ||||
SCO2-aqEtOH | 1070.4 ± 23.9 B | 42.94 ± 4.60 A | 37.48 ± 7.72 A | 30.17 ± 3.12 A |
UA-EtOH | 1642.5 ± 262.2 A | 44.16 ± 4.90 A | 39.24 ± 6.01 A | 30.32 ± 1.39 A |
PH-H2O | 961.1 ± 37.4 B | 43.50 ± 7.51 A | 38.15 ± 9.72 A | 20.89 ± 4.37 B |
Epicatechin | ||||
SCO2-aqEtOH | 406.6 ± 52.5 A | 39.27 ± 7.15 A | 31.28 ± 9.54 A | 29.85 ± 5.09 A |
UA-EtOH | 388.3 ± 98.1 A | 36.53 ± 1.90 A | 30.29 ± 4.44 A | 25.81 ± 1.79 AB |
PH-H2O | 255.0 ± 31.1 B | 44.47 ± 7.81 A | 34.17 ± 8.42 A | 24.35 ± 2.31 B |
Quercetin-3-O-glucoside | ||||
SCO2-aqEtOH | 510.7 ± 10.7 A | 28.75 ± 1.52 A | 26.72 ± 0.83 A | 24.99 ± 1.65 A |
UA-EtOH | 479.3 ± 4.3 B | 28.60 ± 3.23 A | 25.82 ± 2.99 AB | 20.46 ± 2.09 AB |
PH-H2O | 252.9 ± 12.1 C | 24.33 ± 2.34 A | 20.96 ± 2.37 B | 18.38 ± 2.56 B |
Vanillin | ||||
SCO2-aqEtOH | 37.6 ± 2.0 A | 39.44 ± 1.11 A | 26.03 ± 3.70 A | 23.82 ± 1.06 AB |
UA-EtOH | 28.3 ± 3.1 B | 28.74 ± 2.29 B | 25.45 ± 3.11 A | 22.73 ± 1.14 B |
PH-H2O | 21.8 ± 0.4 C | 36.14 ± 1.63 A | 30.19 ± 0.95 A | 27.57 ± 2.63 A |
Data are given as mean ± SD (n = 6); One Way Analysis of Variance (ANOVA) coupled with the Tukey’s post-hoc analysis to identify means with significant differences (p < 0.05) in each extract indicated by different capital letters (same column). 1 Defined as the stability ratio of phenolics after in vitro gastrointestinal digestion. 2 Defined as the percentage of the soluble phenolics to the initial total phenolic content. 3 Defined as the percentage of the soluble phenolics included in small (<200 nm) micelles or particles.