Effect of domestic processing on flatus producing factors in ricebean (Vigna umbellata).

The effect of various processing treatments viz., soaking, pressure cooking, open pan cooking, germination followed by pressure cooking and roasting of whole ricebean and pressure cooking, open pan cooking and fermentation and frying of fermented batter of dehulled ricebean flour was assessed for total sugars and oligosaccharide contents. Dehulling caused a significant reduction in the raffinose and stachyose contents. Pre-soaking of ricebean caused appreciable losses in the oligosaccharide content. Germination (48 h) followed by pressure cooking and fermentation (18 h) followed by frying caused the maximum losses in the raffinose and stachyose contents.