Journal of Food Bioactives, ISSN 2637-8752 print, 2637-8779 online |
Journal website www.isnff-jfb.com |
Original Research
Volume 6, June 2019, pages 100-109
Bioaccessibility and antioxidant activities of finger millet food phenolics
Tables
TPC* µmol ferulic acid equiv | TFC* µmol catechin equiv | TEAC* µmol trolox equiv | DRSA* µmol trolox equiv | RP* µmol ascorbic acid equiv | FICA* µmol EDTA equiv | Ferulic acid µg | |
---|---|---|---|---|---|---|---|
*Abbreviations: TPC, Total phenolic content; TFC, Total flavanoid content; TEAC, Trolox equivalent antioxidant capacity; DRSA, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability; RP, Reducing power; FICA, Ferous ion chelating ability; EDTA, Ethylenediaminetetraacetic acid: dm, dry matter. The same letters in each column seperately for soluble and insoluble-bound phenolic extracts are not significantly different (>0.05). | |||||||
Soluble phenolic extract | |||||||
Raw flour | 32.5 ± 0.4a | 11.0 ± 1.3a | 1.7 ± 0.1a | 21.0 ± 0.8a | 12.4 ± 0.2a | 8.8 ± 0.0a | 101.8 ± 1.7a |
Rotti | 31.3 ± 2.3ab | 8.4 ± 0.9b | 0.9 ± 0.3b | 10.3 ± 1.2b | 27.4 ± 0.4b | 41.1 ± 0.4b | 213.3 ± 17.2b |
Pittu | 29.6 ± 0.6b | 9.6 ± 0.5b | 1.2 ± 0.1b | 8.0 ± 0.3c | 20.4 ± 0.7c | 40.5 ± 1.5b | 116.9 ± 3.8c |
Halape | 43.5 ± 1.4c | 8.1 ± 0.8b | 1.3 ± 0.4c | 12.6 ± 1.8d | 31.9 ± 0.7d | 99.2 ± 0.8c | 342.8 ± 37.1d |
Thalapa | 54.4 ± 1.5d | 17.2 ± 1.3c | 5.2 ± 0.4d | 15.4 ± 1.7e | 32.7 ± 1.0d | 91.6 ± 2.5d | 125.1 ± 41.0e |
Porridge | 79.6 ± 1.6e | 29.6 ± 0.2d | 5.1 ± 0.3d | 50.8 ± 0.6f | 55.6 ± 0.5e | 170.8 ± 1.5e | 556.4 ± 14.2f |
Bound phenolic extract | |||||||
Raw flour | 2.2 ± 0.1a | 0.1 ± 0.02a | 0.70 ± 0.03a | 0.36 ± 0.04a | 3.37 ± 0.7a | 1.42 ± 0.01a | 472.5 ± 0.6a |
Rotti | 4.0 ± 0.3b | 0.8 ± 0.01b | 0.12 ± 0.01b | 1.6 ± 0.2b | 10.8 ± 1.0b | 2.4 ± 0.02b | 0.04 ± 0.01b |
Pittu | 4.2 ± 0.3b | 0.9 ± 0.01c | 0.12 ± 0.01b | 1.0 ± 0.2c | 9.5 ± 1.4b | 2.8 ± 0.02b | 0.02 ± 0.001c |
Halape | 6.2 ± 0.3c | 1.4 ± 0.06d | 0.17 ± 0.03c | 2.3 ± 0.3d | 16.8 ± 0.6c | 3.9 ± 0.02c | 0.03 ± 0.001bc |
Thalapa | 7.2 ± 0.4d | 2.5 ± 0.01e | 0.24 ± 0.03d | 2.8 ± 0.8d | 24.1 ± 2.6d | 7.2 ± 0.2d | 0.02 ± 0.01c |
Porridge | 11.8 ± 0.3e | 2.8 ± 0.01f | 0.38 ± 0.03e | 2.1 ± 0.1d | 32.5 ± 0.1e | 8.5 ± 0.07d | 0.05 ± 0.01b |
Aqueous extraction | Static intestinal digestion bioaccessibility | Dynamic intestinal digestion | Colonic fermentation | |||||
---|---|---|---|---|---|---|---|---|
Gastric phase | Gastric + Intestinal | Gastric | Gastric + Intestinal | Retentate* | Dialysate** | Absorbable (%) | ||
*Retentate, non-dialized fraction after intestinal digestion and represent unabsorbed compounds; **Dialysate, dialyzed fraction after intestinal digesation and represent absorbed compounds; dm, dry matter, The same letters in each column are not significantly different (>0.05) | ||||||||
Total phenolic content (TPC) µmol ferulic acid equiv/g of dm | ||||||||
Rotti | 15.3 ± 1.3a | 22.1 ± 0.9a | 39.6 ± 4.0a | 41.5 ± 3.6a | 23.2 ± 0.9a | 24.6 ± 1.0a | 59.3 | 22.1 ± 3.0a |
Pittu | 13.0 ± 1.0a | 18.7 ± 0.5a | 30.6 ± 1.2b | 70.1 ± 1.6b | 27.6 ± 0.6b | 40.2 ± 2.8b | 57.3 | 26.8 ± 1.7b |
Halape | 10.6 ± 1.6b | 24.4 ± 4.1b | 21.5 ± 2.6c | 68.1 ± 1.2b | 45.0 ± 0.1c | 14.2 ± 1.0c | 20.9 | 24.3 ± 4.1c |
Thalapa | 18.7 ± 1.4c | 25.7 ± 2.2b | 23.2 ± 2.5c | 41.5 ± 1.5a | 19.7 ± 1.3a | 20.4 ± 2.4d | 49.2 | 15.8 ± 2.6d |
Porridge | 27.6 ± 1.0d | 44.7 ± 1.4c | 27.5 ± 2.9b | 69.2 ± 4.9b | 27.9 ± 2.3b | 39.4 ± 0.1b | 57.0 | 20.0 ± 2.4a |
Total flavonoid content (TFC) µmol catechin equiv/g of dm | ||||||||
Rotti | 4.5 ± 0.9a | 8.7 ± 0.2a | 11.7 ± 0.8a | 13.4 ± 0.7a | 8.6 ± 0.7a | 3.4 ± 0.5a | 25.3 | 4.50 ± 0.1a |
Pittu | 8.8 ± 0.3b | 9.7 ± 0.2b | 9.9 ± 1.5b | 27.9 ± 0.4b | 19.3 ± 0.1b | 9.1 ± 0.5b | 32.6 | 3.30 ± 0.2b |
Halape | 6.9 ± 0.3c | 19.2 ± 0.8c | 8.3 ± 1.7c | 23.5 ± 1.2c | 14.7 ± 0.7c | 8.5 ± 0.2b | 36.2 | 2.01 ± 0.5c |
Thalapa | 8.8 ± 0.1b | 11.0 ± 0.2d | 9.3 ± 0.3b | 23.4 ± 0.3c | 7.1 ± 0.4d | 14.2 ± 0.1c | 60.7 | 3.69 ± 0.1d |
Porridge | 10.5 ± 1.0d | 12.7 ± 0.5e | 15.2 ± 0.3d | 18.5 ± 0.7d | 7.1 ± 1.2d | 11.0 ± 0.2d | 59.5 | 5.64 ± 0.1e |
Aqueous extraction | Static intestinal digestion bioaccessiblility | Dynamic intestinal digestion | Absorbable*** | Colonic fermentation | ||||
---|---|---|---|---|---|---|---|---|
Gastric | Gastric + Intestinal | Gastric | Gastric + Intestinal | Retentate* | Dialysate** | |||
*Retentate, non-dialized fraction after intestinal digestion and represent unabsorbed compounds; **Dialysate, dialyzed fraction after intestinal digesation and represent absorbed compounds; *** Percentage (%) antioxidant activity of absorbable phenolic compounds ; dm, dry matter, The same letters in each column are not significantly different (>0.05). | ||||||||
Trolox equivalent antioxidant capacity (TEAC) µmol trolox equiv/g of dm | ||||||||
Rotti | 1.6 ± 0.0a | 7.8 ± 1.7a | 21 ± 2.0a | 39.0 ± 2.4a | 23.0 ± 0.3a | 11.3 ± 1.8a | 29.0 | 5.14 ± 1.2a |
Pittu | 1.3 ± 0.3a | 3.4 ± 0.4b | 9.6 ± 0.6b | 53.5 ± 2.7b | 29.3 ± 0.9b | 25.6 ± 2.3b | 47.9 | 12.63 ± 1.1b |
Halape | 2.2 ± 0.5b | 15.0 ± 1.3c | 5.6 ± 0.0c | 42.7 ± 5.0a | 25.9 ± 3.6b | 18.3 ± 3.2c | 42.9 | 3.04 ± 0.5c |
Thalapa | 1.3 ± 0.3a | 11.8 ± 1.0d | 6.8 ± 0.2c | 42.4 ± 0.3a | 20.0 ± 2.9a | 17.5 ± 3.3c | 41.3 | 2.29 ± 0.9c |
Porridge | 9.0 ± 0.4c | 20.8 ± 1.2e | 17.3 ± 0.8d | 54.3 ± 0.4b | 32.7 ± 3.7c | 22.4 ± 1.2b | 41.3 | 4.86 ± 1.1a |
2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging ability(DRSA) µmol trolox equiv/g of dm | ||||||||
Rotti | 1.4 ± 0.0a | 8.4 ± 0.2a | 10.3 ± 0.5a | 27.4 ± 1.3a | 16.0 ± 3.2a | 7.2 ± 0.1a | 26.3 | 6.07 ± 0.4a |
Pittu | 5.2 ± 0.6b | 5.4 ± 0.1b | 7.2 ± 0.4b | 30.2 ± 1.0b | 20.2 ± 2.2b | 10.8 ± 3.0b | 35.8 | 3.66 ± 0.7b |
Halape | 1.3 ± 0.1a | 6.9 ± 0.3c | 8.3 ± 0.2c | 39.7 ± 1.3c | 19.1 ± 0.6b | 17.8 ± 0.8c | 44.8 | 3.92 ± 0.8b |
Thalapa | 1.5 ± 0.1a | 4.2 ± 0.1d | 1.7 ± 0.2d | 30.5 ± 1.8b | 13.3 ± 0.1c | 13.8 ± 0.6d | 45.2 | 5.36 ± 3.3c |
Porridge | 2.3 ± 0.2c | 7.2 ± 0.1c | 6.6 ± 0.4b | 45.2 ± 1.2d | 17.6 ± 0.6d | 25.5 ± 2.5e | 56.4 | 3.01 ± 0.6b |
Reducing power (RP) µmol ascorbic acid equiv/g of dm | ||||||||
Rotti | 14.1 ± 0.7a | 22.2 ± 0.2a | 31.8 ± 1.7a | 36.6 ± 3.0a | 18.1 ± 0.1a | 15.5 ± 1.2a | 42.3 | 22.9 ± 5.2a |
Pittu | 9.7 ± 1.0b | 10.5 ± 0.1b | 17.4 ± 1.9b | 58.1 ± 0.7b | 7.5 ± 0.7b | 48.6 ± 1.8b | 83.6 | 17.3 ± 1.0b |
Halape | 5.1 ± 0.7c | 26.9 ± 0.3c | 17.2 ± 1.8b | 52.0 ± 1.1c | 19.3 ± 1.6a | 31.8 ± 2.8c | 61.2 | 21.3 ± 2.5a |
Thalapa | 12.3 ± 0.2d | 15.5 ± 0.5d | 13.3 ± 0.2c | 47.7 ± 0.1d | 16.2 ± 1.4c | 28.6 ± 2.9d | 59.9 | 15.5 ± 4.0b |
Porridge | 17.7 ± 0.7e | 28.5 ± 0.2e | 28.0 ± 1.0d | 53.8 ± 1.9e | 10.1 ± 0.9d | 46.3 ± 1.1e | 79.4 | 21.3 ± 3.3a |
Ferrous ion chelating ability (FICA) µmol EDTA equiv/g of dm | ||||||||
Rotti | 56.2 ± 1.2a | 102.3 ± 1.2a | 129.5 ± 3.2a | 187.5 ± 0.5a | 23.1 ± 2.3a | 154.2 ± 3.2a | 82.2 | 31.13 ± 2.9a |
Pittu | 54.3 ± 2.0a | 108.4 ± 1.3a | 134.4 ± 3.4b | 175.2 ± 0.4b | 17.3 ± 2.1b | 143.5 ± 2.4b | 81.9 | 23.56 ± 0.8b |
Halape | 65.2 ± 1.3b | 105.3 ± 1.2a | 120.6 ± 3.0c | 165.5 ± 0.3c | 14.5 ± 1.4c | 140.5 ± 2.1b | 84.8 | 24.24 ± 7.6b |
Thalapa | 45.1 ± 1.4c | 95.2 ± 1.3b | 101.2 ± 2.1d | 190.2 ± 0.1d | 23.1 ± 1.0a | 165.2 ± 2.2c | 86.8 | 24.68 ± 4.7b |
Porridge | 40.3 ± 1.0c | 90.2 ± 0.8b | 110.1 ± 2.1d | 183.2 ± 0.4d | 20.4 ± 1.5a | 153.4 ± 1.2d | 83.7 | 31.13 ± 3.9a |