Optimization of process for reduction of antinutritional factors in edible cereal brans

Reduction of various antinutritional factors in cereal brans by different treatments (microwave heating, dry heating and wet heating) were studied. There was significant difference (p ≤ 0.05) in reduction of antinutritional factors of treated cereal brans except for dry heating at low temperature. Microwave heating at 2450 MHz for 2.5 min resulted in 53.85%, 57.21%, 65.00% and 100% reduction in phytic acid, polyphenols, oxalates and saponins, respectively. Wet heating resulted in maximum reduction in trypsin inhibitor activity (83.07%) at 110 °C for 25 min. Processing treatment resulted in increase in bulk density and slight darkening of the brans. The most effective method of detoxifying most of the toxicants was microwave heating for 2.5 min, and therefore it could be exploited for making treated brans an ideal source for potential food application.

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