conditions, such as temperature, moisture and pressure/shear, may change the content as well as the physicochemical
and nutritional/physiological properties of barley flour components, including dietary fiber. Little research has been done towards understanding the impact of extrusion cooking on the dietary fiber of barley flour. Østerga˚ rd, Bjo¨ rck, and Vainionpa¨ a¨ (1989)reported that dietary fiber content of barley increased upon extrusion cooking, accompanied by a decrease in total starch content. This is probably due to the formation of indigestible starch fragments. However, the
increase in SDF did not account for the total decrease in starch. This is probably due to the newly-formed indigestible
starch fragments, which are too small to precipitate with 80% ethanol employed in the dietary fiber assay (Østergard et al., 1989).