Decorticating Sorghum To Concentrate Healthy Phytochemicals

摘要

The growing prominence of nutrition-related health problems demands strategies that explore nontraditional natural ingredients to expand healthy food alternatives.Specialty sorghums were decorticated using a tangential abrasive dehulling device(TADD)to remove successive bran layers,which were collected at 1 min intervals and analyzed for phenols,tannins,3-deoxyanthocyanins,dietary fiber,and antioxidant activity.The first two bran fractions had the highest levels of phenols and antioxidant activity(3-6 times as compared to whole grain).Brown(tannin-containing)and black sorghums had at least 10 times higher antioxidant activity than white sorghum or red wheat brans.Black sorghums had the highest 3-deoxyanthocyanin content(up to 19 mg/g bran).Dietary fiber in sorghum brans ranged between 36 and 45%,as compared to 48% for wheat bran.Specialty sorghum brans are rich in valuable dietary components and present promising opportunities for improving health attributes of food.