Chemical dehulling of dent corn
1970
Blessin, C.W. | Deatherage, W.L. | Inglett, G.E.
A process has been developed that rapidly dissolves the pericarp (hull or bran) of dent corn with alkali and leaves the endosperm, aleurone layer, and germ intact. Various times (2, 4, 6 min), temp. (140, 160, 180°F), and concn. (10, 15, 20% w/w) were investigated with aqueous solutions of NaOH to determine its effectiveness as a dehulling agent. 3 dent corns (Bear C-14, Bear X-800, and a commercial sample of U.S. No. 2 yellow) were used in this study. In general, a 15% solution of NaOH at 160°F essentially dissolved the pericarp in 3-4 min when agitation was adequate. Residual alkali was neutralized with acetic acid. Average yield of the dehulled corn from this treatment was 93%. Microscopic observation showed that the major portion of the aleurone layer was not removed under these conditions. Alkali dehulling had little measurable effect on ash, ether extract, or protein content. Fibre and total niacin levels were reduced to 50% of their original value.
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