Characterization and Functional Properties of Rice Bran Proteins Modified by Commercial Exoproteases and Endoproteases

Kenaf seeds are underutilized source of food with good source of dietary fiber, protein, essential oil, and phytocompounds. The objectives of this study were to determine the nutritional composition of kenaf seeds, the techno-functional properties of kenaf seeds dietary fibre (KSDF), and sensory analysis of pan bread fortified with dietary fibre that was extracted from kenaf seeds. Analyses showed that kenaf seeds are rich in dietary fibre (28.87 g/ 100 g), protein (27.07 g/ 100 g), oil (23.78 g/100 g) and mineral (5.55 g/100 g). The dietary fibre that was extracted through enzymatic hydrolysis (KSDF (EH)) exhibited significantly (p < 0.05) greater water-binding capacity (WBC), oil-binding capacity (OBC) and viscosity than non-enzymatic hydrolyzed kenaf seeds dietary fibre (KSDF (NEH)) and defatted kenaf seed meal (DKSM). Different formulations of bread were prepared by replacing 10% of wheat flour with wheat bran fibre (positive control), rice bran fibre and KSDF, with white bread unfortified with fibre as negative control. Addition of 10% KSDF to bread formulation significantly (p < 0.05) reduced bread height, volume, specific volume, water activity and firmness, and increased proofing time and bread surface colour. Results from the sensory evaluation of the bread samples also showed that KSDF bread was the most acceptable in comparison to rice bran and wheat bran fortified breads. This study shows that kenaf seed has valuable source of dietary fibre with the potential to be used as a functional ingredient in the development of functional breads.

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Optimisation and Evaluation of the Effect of Bambara Groundnut Addition on the Nutritional Quality and Functional Properties of Amaranth Grain-Based Composite Flour

Acta Universitatis Cibiniensis Series E Food Technology ◽

10.1515/aucft-2017-0014 ◽

2017 ◽

Vol 21 (2) ◽

pp. 43-52 ◽

Cited By ~ 1

Author(s):

Olugbenga Olufemi Awolu ◽

Eunice Yetunde Olokunsusi

Keyword(s):

Protein Content ◽

Functional Properties ◽

Rice Bran ◽

Nutritional Quality ◽

Bambara Groundnut ◽

High Protein ◽

Composite Flour ◽

Crude Fibre ◽

Amaranth Grain ◽

Positive Effect

AbstractNutritional quality and functional properties of composite flour consisting amaranth grain, bambara groundnut, carrot and rice bran flours were evaluated. The dependent variables were optimized using optimal mixture model of response surface methodology. Amaranth grain flour (70 – 80.75%), bambara groundnut flour (15-25%), carrot flour (2-5%) and rice bran (2-10%) were the independent variables. From the results, very high protein content (about 40%) was obtained when the bambara content inclusion was 25%. Bambara groundnut flour inclusion up to 15% also resulted in high protein contents (≤ 37%). Supplementation of the composite flour with high carrot flour content (up to 10%) also enhanced the protein content when the bambara groundnut content was low. High carrot flour inclusion had the highest positive effect on the crude fibre content (3.7-3.9%) followed by rice bran and bambara groundnut flours in that order. Bambara groundnut had highest positive effect on the ash content; followed by carrot and rice flours. While amaranth grain, carrot and rice bran significantly (p≤0.05) affect the proximate and functional compositions, bambara groundnut had the highest and best effect on the proximate, functional, mineral properties as well as the amino acid profile of the composite flour.

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Sperathe effects of solid-state fermentation in the functional properties of defatted rice bran and wheat bran

Brazilian Archives of Biology and Technology ◽

10.1590/s1516-89132009000600027 ◽

2009 ◽

Vol 52 (6) ◽

pp. 1555-1562 ◽

Cited By ~ 9

Author(s):

Cristina Moreira da Silveira ◽

Eliana Badiale-Furlong

Keyword(s):

Solid State ◽

Protein Content ◽

Functional Properties ◽

Rice Bran ◽

Wheat Bran ◽

Solid State Fermentation ◽

Protein Solubility ◽

Defatted Rice Bran ◽

Rhizopus Sp ◽

Water Holding

Functional properties of fermented bran produced by Aspergillus oryzae and Rhizopus sp. in a solid-state fermentation system were determined, with an aim to evaluate their application in food formulation. The defatted rice bran and wheat bran were inoculated with the spores of the cultures and incubated at 30º C for 72 h. Samples were withdrawn at 0, 24, 48 and 72 h. Protein content, protein solubility, in-vitro digestibility, gelation and water holding capacity were determined in bran with or without fermentation. Rhizopus sp. increased significantly the protein content (69.0 and 56.0%, respectively, for defatted rice bran and wheat bran); protein solubility (28.5 and 36.2) and water holding capacity (11.4% for wheat bran). When A. oryzae was used all these properties were modified significantly after fermentation.

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