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Waxy maize starch modified by sun-drying after spontaneous or backslopping fermentation.
Camila Souza Teixeira1, Glenda Antonia da Rocha Neves1, Márcio Caliari1
1Universidade Federal de Goiás (UFG), School of Agronomy, Rodovia GO-462, Km 0, CP 131, Campus Samambaia, 74690-900 Goiânia, Brazil.
International Journal of Biological Macromolecules
|May 25, 2019
Summary
Sun-drying waxy maize starch (WMS) after fermentation alters its properties. Back-slopping fermentation accelerates WMS modification, enhancing its industrial applications.
Area of Science:
- Food Science
- Biochemistry
- Material Science
Background:
- Waxy maize starch (WMS) is a versatile biopolymer with diverse industrial applications.
- Fermentation and sun-drying are common post-harvest treatments that can modify starch properties.
Purpose of the Study:
- To investigate the effects of spontaneous fermentation (FS) and back-slopping fermentation (BSF) followed by sun-drying on waxy maize starch properties.
- To analyze changes in thermal, pasting, chemical, water activity, swelling, solubility, and morphological characteristics of WMS.
Main Methods:
- Waxy maize starch was subjected to spontaneous fermentation and back-slopping fermentation.
- Fermented starches were sun-dried.
- Analysis included thermal properties (DSC), pasting properties (viscometry), water activity, chemical composition, swelling power, solubility, and SEM.
Main Results:
- Back-slopping fermentation significantly reduced the time to reach 4% total acidity (7 days vs. 27 days).
- FS altered peak viscosity, final viscosity, setback, peak time, and paste temperature compared to native WMS.
- Neither fermentation type altered gelatinization parameters, viscosity breakdown, or oil solubility.
Conclusions:
- Sun-drying after fermentation modifies waxy maize starch properties, particularly viscosity and thermal characteristics.
- Back-slopping fermentation offers a faster route for WMS modification.
- Modified WMS exhibits altered functional properties, potentially expanding its industrial applications.
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