Effect of the addition of whole-grain wheat flour and of extrusion process parameters on dietary fibre content, starch transformation and mechanical properties of a ready-to-eat breakfast cereal
This study evaluates the effect of the incorporation of whole-grain wheat flour (WGWF) and of extrusion process parameters on the nutritional and technological quality of breakfast cereals. The corn flour-based breakfast cereals were elaborated in a twin-screw extruder following a rotatable central composite design with varied WGWF (0-100%), feed moisture (14-24%) and zones 3 and 4 barrel temperature (76-143 °C). Dietary fibre and resistant starch were significantly increased with WGWF addition. Total and digestible starch showed a decrease when WGWF increased. The RVA parameters were significantly affected by all the extrusion conditions and WGWF content. The cell structure of the extrudates was dependent of WGWF and moisture.
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| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Published: |
Blackwell Publishing
2015
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| Subjects: | Breakfast cereals, Whole grain, Image analysis, Response surface methodology, Extrusion, |
| Online Access: | http://hdl.handle.net/10261/117327 |
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| Summary: | This study evaluates the effect of the incorporation of whole-grain wheat flour (WGWF) and of extrusion process parameters on the nutritional and technological quality of breakfast cereals. The corn flour-based breakfast cereals were elaborated in a twin-screw extruder following a rotatable central composite design with varied WGWF (0-100%), feed moisture (14-24%) and zones 3 and 4 barrel temperature (76-143 °C). Dietary fibre and resistant starch were significantly increased with WGWF addition. Total and digestible starch showed a decrease when WGWF increased. The RVA parameters were significantly affected by all the extrusion conditions and WGWF content. The cell structure of the extrudates was dependent of WGWF and moisture. |
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