Abstract
Summary Three stabilisation techniques, microwave, dry heat and parboiling were applied to bran followed by enzymatic extraction, biological quality through growth and nitrogen balance study and safety assessment through 45 days feeding trial. Traits linked with protein bio-evaluation were affected significantly by the test diets (P < 0.05), growth study parameters during the experimental remained as; PER from 1.97 to 2.18 with higher value for microwave stabilised protein isolates, net protein ratio of 4.43–5.14. Nitrogen balance study parameters too were better in microwave and dry heat stabilised protein isolates, while the lowest values were observed for parboiled protein isolates; true digestibility was within the range of 76.0–86.11% and biological value of extracted isolates was within the upper and lower limit of 78.57–88.23. No general ill effects were observed during the safety evaluation trial as the serum biochemical profile and organ to body weight ratio exhibited normal metabolic activity. Findings of current study are supportive for the suggestion that these extracted isolates can be safely used for variety of foods especially the designed formulations for protein deficient vulnerable groups especially from low socio-economic countries.
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