In this work, corn extruded snack products were enriched with rice bran (RB) at 10 and 15%. A co-rotating twin screw extruder was used with a feed moisture content of 16 g 100 g-1, a screw speed of 240 rpm and four heating sections of the barrel (100, 140, 150 and 150 °C). The impact of RB inclusion on nutritional profile, starch digestion, physicochemical and textural properties of snack products was evaluated. RB-enriched extrudates showed a lower specific volume and hardness, and higher crispness than control. RB at 15% gave a water holding capacity lower than control. Rheology of extrudate dispersions indicated an increase in elastic interactions and solid-like behaviour with RB supplementation. Differences in rheological properties resulted in attenuation of predictive glycaemic response for RB enriched snacks.
The effect of rice bran on physicochemical, textural and glycaemic properties of ready-to-eat extruded corn snacks
Niccolò RenoldiInvestigation
;Donatella Peressini
Supervision
2021-01-01
Abstract
In this work, corn extruded snack products were enriched with rice bran (RB) at 10 and 15%. A co-rotating twin screw extruder was used with a feed moisture content of 16 g 100 g-1, a screw speed of 240 rpm and four heating sections of the barrel (100, 140, 150 and 150 °C). The impact of RB inclusion on nutritional profile, starch digestion, physicochemical and textural properties of snack products was evaluated. RB-enriched extrudates showed a lower specific volume and hardness, and higher crispness than control. RB at 15% gave a water holding capacity lower than control. Rheology of extrudate dispersions indicated an increase in elastic interactions and solid-like behaviour with RB supplementation. Differences in rheological properties resulted in attenuation of predictive glycaemic response for RB enriched snacks.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
