Table 2.
Concentrations of free glucose, arabinose, and xylose, total AXs, WEAX and AEAX, total β-glucans, glucose from rapidly and slowly digestible starch, and glucose from resistant starch, in BSG extract, and AXs, β-glucans, and resistant starch determined in the total fiber dry residue.
| Compound | Concentration (g/100 g) 1 |
|---|---|
| Free glucose occurring in BSG extract | 5.53 ± 0.01 |
| Free arabinose occurring in BSG extract | 0.71 ± 0.01 |
| Free xylose occurring in BSG extract | 0.95 ± 0.01 |
| Total AXs occurring in BSG extract | 7.50 ± 0.05 |
| WEAX—water extractable arabinoxylans | 1.23 ± 0.02 |
| AEAX—alkali extractable arabinoxylans | 6.36 ± 0.03 |
| AXs insoluble in ethanol (78%) occurring in total fiber dry residue | 0.45 ± 0.01 |
| AXs soluble in ethanol (78%) 2 | 7.05 ± 0.01 |
| Total β-glucans occurring in BSG extract | 1.92 ± 0.05 |
| β-glucans insoluble in ethanol (78%) occurring in total fiber dry residue | N.D.3 |
| Glucose after 30 min of enzymatic hydrolysis occurring in BSG extract 4 | 30.36 ± 0.01 |
| Glucose after 4 h of enzymatic hydrolysis occurring in BSG extract 5 | 45.00 ± 0.06 |
| Glucose after 4 h of enzymatic hydrolysis occurring in total fiber dry residue | 0.62 ± 0.01 |
| Total dietary fiber | 7.45 ± 0.03 |
1 Data expressed as means ± SD (n = 3). 2 calculated by the difference between total AXs present in the BSG extract and AXs present in the total fiber dry residue. 3 N.D. not detectable. 4 corresponding to glucose from rapidly and slowly digestible starch, including free glucose. 5 corresponding to glucose from resistant starch, including glucose from rapidly and slowly digestible starch and free glucose.