Screw press (SP): The seed particle size used was between 2.4
and 4.8 mm, corresponding to the optimum values for feeding the
press. Before pressing, seed particles were sprinkled with fresh
water to reach 7e8 g 100 g1 of moisture content (Singh & Bargale,
2000). The water-sprinkled samples were then packed in air-tight
metal containers and stored for about 48 h for equilibration. The
containers were shaken at regular intervals to distribute moisture
uniformly throughout the sample. Pressing was carried out at three
different temperatures (25, 50 and 70 C). Oil extractionwas carried
out with a Komet screw press (Model CA 59 G, IBG Monforts,
M€onchengladbach, Germany), with a 5 mm restriction die and a
screw speed of 20 rpm. The temperature of the process was
controlled using an electrical resistance-heating ring surrounding
the press barrel. Running temperature was checked with a digital
thermometer inserted into the restriction die. The resulting flours
were encoded as SP 25, SP 50 and SP 70.
All flours obtained were stored at 18 C until further use.