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Human gastrointestinal action on wheat, corn, and soy hull bran--preliminary findings

Dintzis, F.R., Legg, L.M., Deatherage, W.L., Baker, F.L., Inglett, G.E., Jacob, R.A., Reck, S.J., Munoz, J.M., Klevay, L.M., Sandstead, H.H., Shuey, W.C.
Cereal chemistry 1979 v.56 no.3 pp. 123
wheat bran, corn bran, soybeans, bran, soybean hulls, dietary fiber, digestion, digestibility, defecation, feces, humans
Initial studies showed some changes in composition and morphology of brans of AACC wheat (a soft white wheat), dry milled corn and soybean hull after passage through the human alimentary tract. These materials are incorporated in bread to provide the major food fiber component of a controlled diet. They were retrieved as identifiable particles from lyophilized feces of 5 healthy volunteers, analyzed for changes in major fiber components and examined by scanning electron microscopy. The corn bran was recovered in yields .gtoreq. 90% and seemed little affected by its journey. AACC wheat bran was recovered stripped of adhering endosperm and some aleurone layer. Its appearance changed greatly because remaining pericarp layers were folded or curled; recovered material displayed losses of .apprx. 15% cellulose and 60% apparent hemicellulose. Soybean hulls could be greatly disrupted by the human alimentary system with major losses of cellulose and apparent hemicellulose. Digestive effects on soy hulls may differ greatly between individuals; sometimes cellulose and lignin were almost fully recovered and apparent hemicellulose was .apprxeq. 50% recovered.