FUNCTIONAL PROPERTIES OF PROTEIN ISOLATES FROM THE SEEDS OF Delonix regia (FLAMES OF THE FOREST) AND Lonchocarpus sericeus (SENEGAL LILAC)

OYEDEJI, ABDULRASAQ and OMOYENI, OLUWATOBI and AFUYE, OLUKOREDE (2019) FUNCTIONAL PROPERTIES OF PROTEIN ISOLATES FROM THE SEEDS OF Delonix regia (FLAMES OF THE FOREST) AND Lonchocarpus sericeus (SENEGAL LILAC). In: Proceedings of 1st WITED National Conference, 2019, AUGUST 13TH - 16TH, The Federal Polytechnic, Ilaro.

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Abstract

The functional properties of protein isolated from the seeds of Lonchocarpus sericeus (LS) and Delonix regia (DR) were investigated. The proteins were isolated by alkaline solubilisation, and acid precipitated at pH 10.5 and 4.5, respectively and then freeze-dried. The functional properties evaluated include water absorption capacity that was 226.6 and 190.0 ml/g, respectively for D. regia and L. sericeus while the oil absorption capacity was 215 and 166.83 ml/g for the protein isolates (D. regia and L. sericeus). The two isolates exhibited similar bulk and tap density values of 0.5 and 0.51 g/cm3, respectively. The foaming capacity and stability for the isolates were 7.33 and 6.66% and 2.67 and 2.33% for D. regia and L. sericeus in that order. Swelling power was 2.34-7.47% and 2.71-3.59%, and solubility ranged from 12.75-35.5 and 34.00-100% respectively for D. regia and L. sericeus at a temperature of between 55 and 95oC. pH from the acidic to the alkaline region affected the swelling power of the isolates similarly, but a reversed effect on the solubility. The emulsion capacity and stability obtained were 34.14 and 30.77% and 30.4 and 29.69% D. regia and L. sericeus. There was a significant difference between swelling power and solubility, the effect of pH on swelling power and solubility and water and oil absorption capacity. However, there was no significant difference between bulk and tap density, foaming capacity and stability, and emulsion capacity and stability. Both isolates were found to possess functional properties that were similar and in some instances, better than the protein isolates of some popular legumes.

Item Type:	Conference or Workshop Item (Paper)
Subjects:	Q Science > Q Science (General)
Divisions:	Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User:	Mr Taiwo Egbeyemi
Date Deposited:	19 May 2020 17:45
Last Modified:	19 May 2020 17:45
URI:	http://eprints.federalpolyilaro.edu.ng/id/eprint/119

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