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Published on: September 11, 2020
Characterization of molecular properties of wheat starch from three different types of breads using asymmetric flow
Catalina Fuentes1, Rossio Castañeda2, Fanny Rengel2
1Food Technology, Engineering and Nutrition, Faculty of Engineering LTH, Lund University, PO Box 124, SE-221 00 Lund, Sweden; School of Chemistry, Faculty of Pure and Natural Science, Universidad Mayor de San Andres (UMSA), PO Box 330, Cota Cota 27 St., La Paz, Bolivia.
Abstract:
In this study, molecular properties of wheat starch from three different types of breads were analyzed using asymmetric flow field-flow (AF4) connected to multi-angle light scattering (MALS) and differential refractive index (dRI) detectors. This analysis allowed the determination of molecular properties, i.e. molar mass (M), root-mean-square radius (rrms), apparent density (ρapp) and conformation. Complementary analyses, such as resistant starch and amylose content, were also performed. The results show that wheat starch extracted from breads can have different properties reflected in changes in M, rrms and ρapp. In addition, the results suggest that some of the changes in molecular properties may be related to the presence of resistant starch.
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