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标题：Effects of the Addition of Flaxseed and Amaranth on the Physicochemical and Functional Properties of Instant-Extruded Products
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作者：Jazmin L. Tobias-Espinoza ; Carlos A. Amaya-Guerra ; Armando Quintero-Ramos 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2019
卷号：8
期号：6
页码：1-14
DOI：10.3390/foods8060183
出版社：MDPI Publishing
摘要：The addition of flaxseed and amaranth on the physicochemical, functional, and microstructural changes of instant-extruded products was evaluated. Six mixtures with different proportions of amaranth (18.7–33.1%), flaxseed (6.6–9.3%), maize grits (55.6–67.3%) and minor ingredients (4.7%) were extruded in a twin-screw extruder. Insoluble and soluble fiber contents in extrudates increased as the proportions of amaranth and flaxseed increased. However, the highest flaxseed proportion had the highest soluble fiber content (1.9%). Extruded products with the highest proportion of flaxseed and amaranth resulted in the highest dietary fiber content and hardness values (5.2 N), which was correlated with the microstructural analysis where the crystallinity increased, resulting in larger, and more compact laminar structure. The extruded products with the highest maize grits proportion had the highest viscosity, expansion, and water absorption indexes, and the lowest water solubility index values. The mixtures with amaranth (18.7–22.9%), flaxseed (8.6–9.3%), and maize grits (63.8–67.3%) resulted in extruded products with acceptable physicochemical and functional properties.
关键词：extruded products; flaxseed; amaranth; dietary fiber; extrusion-cooking extruded products ; flaxseed ; amaranth ; dietary fiber ; extrusion-cooking