Oil absorption capacity

Oil absorption capacity (OAC) was measured following the method Jyothirmayi et al. (2006) with some modifications. Samples of 1.0 g were placed into 50 mL polypropylene conical centrifuge tubes and thoroughly mixed with 10 mL of refined soybean oil. This mixture was heated at 60°C, with shaking, in a water bath (BS-21; Jeio Tech, Korea) for 1 h. The solution was centrifuged at 3,000 g for 15 min, then the supernatant was removed, and the sediment was drained for 30 min at room temperature. OAC (g/g) was calculated as the per unit weight gain of the sample.