Disk milling reduced particle size (Fig. 2, red traces). The large
particle peak in the bimodal distribution disappeared, and curves
were left shifted further than those of nonmilled samples (Table 4).
WDM treated samples (128 lm) had similar average particle size
to HW (160 C for 4 min) with WDM treated samples (105 lm),
and HW (160 C for 8 min) with WDM treated samples (130 lm).
After disk milling, raw samples, HW (160 C for 4 min) treated
samples and HW (160 C for 8 min) treated samples had average
particle sizes of 128, 105, and 130 lm, respectively. Greater size
reduction was achieved in samples hot water pretreated above