Variations in the Functional Properties of Soybean Flour Fermented with Lactic Acid Bacteria (LAB)-Consortium

Abstract

The functional properties of soybean flour fermented with lactic acid (LAB)-consortium was evaluated. Soybean was processed into flour, fermented spontaneously and with LAB-consortium previously isolated from maize (Lactobacillus plantarum WCFS1+Lactobacillus rhamnosus GG, ATCC 53/03+Lactobacillus nantensis LP33+Lactobacillus fermentum CIP 102980+Lactobacillus reuteri DSM 20016) and sorghum (Pediococcus acidilactici DSM 20284+Lactobacillus fermentum CIP 102980+Lactobacillus brevis ATCC 14869+Lactobacillus nantensis LP33+Lactobacillus plantarum WCFS1) to evaluate their effects on the functional properties of the flour at 12 h intervals using standard techniques. The result shows gradual decrease in bulk density with increasing fermentation period ranging from 0.74 ± 0.03 g/mL to 0.72 ± 0.03 g/mL (natural), from 0.74 ± 0.03 g/mL to 0.70 ± 0.02 g/mL (LAB-consortium from maize) and from 0.74 ± 0.03 g/mL to 0.70 ± 0.02 g/mL (LAB-consortium from sorghum) fermentation. The swelling capacity decreased from 0.77 ± 0.03 g/mL to 0.64 ± 0.01 g/mL, from 0.77 ± 0.03 g/mL to 0.59 ± 0.01 g/mL and from 0.77 ± 0.03 g/mL to 0.61 ± 0.03 g/mL in natural, LAB-consortium from maize and sorghum fermentations respectively. Water holding capacity decreased from 2.4 ± 0.03 mL/g to 1.9 ± 0.03 mL/g, from 2.4 ± 0.03 mL/g to 2.0 ± 0.03 mL/g and from 2.4 ± 0.03 mL/g to 1.9 ± 0.03 mL/g in natural, LAB-consortium from maize and sorghum fermentation respectively. Oil holding capacity increased significantly (p<0.05) with increasing fermentation time, ranging from 8.92 ± 0.02 mL/g to 9.30 ± 0.03 mL/g (natural), 8.92 ± 0.01 mL/g to 9.63 ± 0.03 mL/g (LAB-consortium from maize) and from 8.92 ± 0.03 mL/g to 9.69 ± 0.03 mL/g (LAB-consortium from sorghum) fermentations. The least gelation concentration ranged from 3.0% (unfermented) to 6.0% (other fermentation products). Emulsion capacity (EC) increased from 35.88 ± 3.12% to 44.33 ± 1.33%, from 35.88 ± 3.12% to 46.83 ± 3.18% and from 35.88 ± 3.12 % to 45.99 ± 2.21% in natural, LAB-consortium from maize and sorghum fermentations respectively. This suggests the potentials of LAB-consortia fermentation in improving nutritional and functional properties of soybean flour.

Effect of Blanching Plus Fermentation on Selected Functional Properties of Mealworm (Tenebrio molitor) Powders

“…In this study, the lactic acid fermented lupin proteins were characterised by a lower hydrophobicity than non-modified lupin proteins and, consequently, by worse emulsifying properties. The emulsification properties of potato flours [31] and sorghum flour [32], on the other hand, were improved by fermentation. Their soluble protein concentrations were increased during fermentation, which promotes oil droplet entrapment.…”