Journal
LWT-FOOD SCIENCE AND TECHNOLOGY
Volume 68, Issue -, Pages 391-399Publisher
ELSEVIER
DOI: 10.1016/j.lwt.2015.12.016
Keywords
beta-carotene; Functional ingredients; Extrusion; Dietary fiber; Daucus carota L.
Categories
Funding
- New Faculty Seed Grant - Washington State University (OGRD), Office of the Grants and Development [3057-9903]
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Corn starch was extruded with the inclusion of carrot pomace at levels of 5, 10, and 15 g/100 g at three different feed moisture levels of 15, 22.5 and 30 g/100 g. Corn starch without any added pomace was extruded as a control treatment. A thorough evaluation of the extrudate properties (expansion ratio, unit density, water solubility index, water absorption index, microstructure, and beta-carotene content) was conducted to understand the role of the insoluble fiber in the carrot pomace on the extrusion process, specifically relating to expansion. The best expansion was observed in the extrudates with 5 g/100 g carrot pomace inclusion, and at 15 g/100 g feed moisture. The surface of this extrudate also improved, compared to the control and extrudates with higher levels of pomace inclusion. The extrudates with higher levels of carrot pomace showed a significant decrease in expansion. Overall, the results showed that the level of carrot pomace inclusion had significant impact on the extrudate quality. (C) 2015 Elsevier Ltd. All rights reserved.
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