Effects of Rehydration Time on the Nutritional Quality and Antioxidant Activity of Dried Male Walnut Flowers
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Abstract:
The effects of rehydration time on the nutritional quality of dried male walnut flowers were studied by analyzing the contents of primary nutrients, mineral elements, amino acids, and antioxidant substances, as well as the antioxidant activity. The results showed that the nutritional quality and antioxidant activity of dried male walnut flowers could be well maintained when the rehydration time was limited to 10 min. A short rehydration time (10 min) had a slight influence on the contents of macromolecular compounds, such as fat, starch, and some amino acids (glutamate, tyrosine, lysine, and proline). With prolonged rehydration time, the contents of primary nutrients, seven mineral elements (but not calcium or magnesium), 17 amino acids, and antioxidant active substances decreased by various degrees. The longer the rehydration time, the greater the decline observed. In terms of maintaining the nutritional quality and antioxidant activity, 10 min was the optimum time for the rehydration of dried walnut flowers. These results provide a technical and theoretical basis for utilizing abundant male walnut flowers scientifically.
