Table 1.
The components of phytochemicals in methanol sticky rice bran extracts.
| Compounds (Per Gram Extract) |
Purple Rice Bran | White Rice Bran |
|---|---|---|
| Spectrophotometry analysis | ||
| Total phenolic compounds (mg) | 74.2 ± 3.6 * | 16.5 ± 1.0 |
| Total flavonoids (mg) | 50.7 ± 1.4 * | 12.7 ± 1.8 |
| Total anthocyanins (μg) | 29.7 ± 0.2 * | ND |
| Total phytic acids (mg) | 9.71 ± 2.4 | 7.39 ± 1.9 |
| HPLC method | ||
| Total γ-oryzanol (mg) | 3.71 ± 0.02 | 5.05 ± 0.04 * |
| Total vitamin E (μg) | 321.4 ± 9.3 * | 274.7 ± 4.4 |
| α-tocopherol (μg) | 24.5 ± 0.3 | 13.6 ± 0.1 |
| β-tocopherol (μg) | ND | 26.1 ± 0.3 |
| γ-tocopherol (μg) | 44.1 ± 1.9 | 39.4 ± 0.3 |
| δ-tocopherol (μg) | 5.6 ± 0.1 | ND |
| α-tocotrienol (μg) | 14.1 ± 0.1 | ND |
| γ-tocotrienol (μg) | 202.6 ± 6.9 | 167.3 ± 5.1 |
| δ-tocotrienol (μg) | 30.5 ± 0.4 | 28.0 ± 0.2 |
| p-Coumaric acid (mg) | 0.35 ± 0.00 | 0.84 ± 0.02 * |
| Protocatechuic acid (mg) | 7.12 ± 0.03 * | ND |
| Vanillic acid (mg) | 4.73 ± 0.02 * | ND |
| 4-Hydroxybenzoic acid (mg) | ND | 0.35 ± 0.01 * |
| Cyanidin-3-glucoside (μg) | 5.7 ± 0.0 * | ND |
| Peonidin-3-glucoside (μg) | 3.6 ± 0.0 * | ND |
Values are presented as mean ± SD, ND: Not Detected, n = 3. * Significantly different between the extract (p < 0.05).