Tannins and phytic acid of heated faba beans were
reduced (PIO.05) by 55560% and 3141%, respectively.
Similar results were obtained by Beal and Mehta (1985)
and Ziena (1989). Germination was less effective than
heat treatments in reducing tannins while it was more
effective in reducing phytic acid. Therefore, it improves
the nutritional quality of the beans.
Raw faba bean contained considerable quantities of
vicine and convicine (0.68% and 0.27%, respectively).
Pitz et al. (1981) analysed the whole seed of 242 faba
bean cultivars and reported a range of 0.440.82%
vicine and 0.13-0.64% convicine. Our findings are in
the reported range of Pitz et al. (1981). Both heat treatments
and germination showed significant (PI 0.05)
decreases in vicine content. However, non-significant
(P2 0.05) reduction in convicine was observed after
cooking and germination. Similar results were reported
by Hegazy and Marquardt (1983) and El-Adawy (1986).
Trypsin inhibitor activity in faba bean was significantly
(P10.05) reduced by heat treatments and germination.
Autoclaving was more effective (P20.05) in
reducing trypsin inhibitor activity than cooking. Ziena
(1989) reported that the inhibition of trypsin inhibitor