Instant properties of ingredients used for point of consumption production of high-moisture food structures selectively fortified with protein and dietary fibre
2019
Calton, Alex | Ma, Hairan | Nordlund, Emilia | Poutanen, Kaisa | Sozer, Nesli
This study aimed to understand the powder properties of ingredients (whey and potato protein isolates, fine and coarse non-digestible maltodextrin, instant waxy maize and potato starches) that allow point of consumption machine-production of protein and fibre fortified products of varying consistency. Common characteristics of ingredients suitable for instant food preparation and use included free powder flow (avalanche angles of 42.2–46.4°), large particle size with narrow size distribution (d50 = 177–309 μm), high porosity and rapid de-agglomeration into primary particles in contact with water. Instant production of liquid (<0.1 Pa s) and semi-solid (1–4 Pa s) model products enriched with high protein and/or high dietary fibre, at concentrations justifying nutrition claim, was demonstrated. Texture of semi-solid products was modulated with waxy maize starch that appeared as densely packed swollen granules in a solution of non-viscous whey protein and/or non-digestible maltodextrin.
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