changed to 1/8. When isopropanol was used as an extraction solvent, the mean oil yields were 15.1%, 15% and 19.6% at seed to solvent ratios of 1/4, 1/6 and 1/8, respectively. We can also observe in
Fig. 2(c) that isopropanol is a better solvent than ethanol at seed to
solvent ratio of 1/8.