Structural, rheological and in-vitro digestibility properties of composite corn-banana starch custard paste
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Date
2017-01-09
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Published by Elsevier for Journal of the Swiss Society of Food Science and Technology
Abstract
This study investigated the influence of native or hydrothermally modified banana starch on structural,
rheological and in-vitro digestibility properties of corn starch custard pastes. Banana starch was incorporated into the formulation in the ratio 1:4 (g/g) of the composite. Amylose content in the pastes varied
significantly (p < 0.05) from 17.61 to 27.27 g/100 g. Scanning electron micrographs revealed similar
homogenous, non-continuous, flake-like network structure for all paste samples. Addition of modified
banana starch generally reduced the strength of the pastes. Generally, the paste samples showed shear
thinning behavior of thermoplastic materials. Banana starch inclusion in the custard formulation
significantly (p < 0.05) increased the slowly digestible starch fraction of the pastes, while the addition of
annealed or heat moisture treated banana starch significantly (p < 0.05) increased the resistant starch
component.
Description
Keywords
Banana starch;, Custard paste;, In-vitro digestibility;, Rheology;, Breakfast cereal