Table 1.
Melatonin and free tryptophan contents of grain cultivars, raw milk and mulberry leaf
| Sample | Melatonin (ng/g dw) | Free tryptophan (ng/g dw) |
|---|---|---|
| Red dawk mali rice | 17.50 ± 0.40f | 347.99 ± 9.65e |
| Khao dawk mali rice 105 | 18.56 ± 0.57f | 201.75 ± 2.71gh |
| Black glutinous rice | 21.15 ± 0.65f | 183.75 ± 6.69gh |
| Glutinous rice (RD 6) | 21.84 ± 1.52f | 145.86 ± 13.03h |
| Waxy corn | 27.04 ± 0.12e | 137.20 ± 5.82h |
| Wax berry corn | 27.97 ± 0.12e | 230.18 ± 12.80fg |
| Mung bean | 30.25 ± 0.03e | 845.27 ± 14.59c |
| Sweet corn | 34.88 ± 1.02d | 171.65 ± 5.41gh |
| Riceberry rice | 36.26 ± 0.80d | 743.53 ± 26.36d |
| Peanut | 39.43 ± 1.61d | 205.97 ± 13.67gh |
| Red bean | 54.79 ± 0.79c | 1527.23 ± 31.66b |
| Soybean | 56.49 ± 1.45c | 2617.83 ± 143.06a |
| Sunflower | 67.45 ± 0.96b | 298.11 ± 26.66ef |
| White sesame | 75.24 ± 9.66a | 356.20 ± 19.50e |
| Fresh mulberry leaves (ML) | 51.57 ± 2.41a | 210.53 ± 9.26a |
| ML-freeze drying (F) | 42.15 ± 3.89b | 124.99 ± 5.73b |
| ML-solar drying (S) | 40.18 ± 2.39b | 101.07 ± 1.59c |
| ML-hot air oven drying (H) | 31.57 ± 0.26c | 82.63 ± 0.43d |
| Soymilk powder | 46.40 ± 4.45 | 3807.48 ± 156.67 |
| Raw milk* | 0.03 ± 0.00 | 1896.87 ± 35.79 |
Raw milk (*) is expressed per ml, dw refers to dry weight. Values within a column represent mean ± standard deviation of triplicate experiments (n = 3) with different letters indicating significant difference (P < 0.05)