Table 1.
Water activitya, Hunter Lab color parametersa, chemical compositiona, and antioxidant capacitya,b obtained from sunflower seed hull powder (SP).
| SP | |
|---|---|
| Water activity (25.0°C) | 0.575 ± 0.002 |
| L (%) | 35.4 ± 0.2 |
| a | +1.90 ± 0.01 |
| b | +6.81 ± 0.03 |
| Proteins (% w/w) | 1.3 ± 0.1 |
| Uronic acids (% w/w) | 4.0 ± 0.5 |
| Neutral sugars (% w/w) | 38.5 ± 0.1 |
| Cellulose (% w/w) | 29.8 ± 0.7 |
| Lignin (% w/w) | 26.4 ± 0.5 |
| DPPH (mg AA/100 g powder) | 95 ± 2 |
| FRAP (mg AA/100 g powder) | 152 ± 5 |
a
Mean and standard deviation for n = 3 are reported.
b
Results of the DPPH and FRAP assays are expressed as L-(+)-ascorbic acid (AA).