Tailoring physicochemical and sensorial properties of defatted soybean flour using jet-milling technology.

The effects of jet-milling on the physicochemical and sensorial properties of defatted soybean flour (DSF) were investigated. Superfine DSF powder (DSF-JM; D50 = 4.3 ± 0.1 µm) was prepared from DSF powder (DSF-150; D50 = 257.0 ± 1.7 µm) via conventional sifting followed by jet-milling. The jet-milled DSF showed significant increases in hydration properties, with increases in the water-holding capacity, water-solubility index, and swelling capacity of 24%, 39%, and 32%, respectively. Soluble dietary fibre and fat-binding capacity of DSF-JM also increased significantly (p < 0.05). A quantitative descriptive analysis by trained panelists indicated that the sensorial properties of DSF were also modified by jet milling. The DSF-JM showed significant reductions in bitterness and roughness, but sweetness increased, and the colour of DSF-JM changed to a brighter achromatic colour. These results indicate that superfine DSF could be an ingredient used to modify physical and sensorial properties of food.