Utilization of sustainable plant proteins is limited by low yield of the existing extraction and processing methods. The study aims to present a comparative assessment of three extraction techniques – ultrasound, microwave and high-pressure homogenization – against conventional alkaline extraction as control on the structural and functional properties of Vigna radiata L. (mung bean) proteins.
RESULTS
Homogenization resulted in the highest extraction yield (20.1%). Infrared and circular dichroism spectroscopic analyses revealed changes in the secondary structure of proteins due to extraction treatments compared to alkaline extraction. All concentrates showed X-ray diffraction amorphous halos typically seen in legume proteins. Compared to the control, microstructural analysis revealed the porous structure of homogenization-derived proteins, roughness of microwave-derived proteins, and dense and aggregated morphology of ultrasound-derived proteins. The electrophoresis profiles and size-exclusion chromatograms were similar for all concentrates. Microwave treatment resulted in the highest water absorption (5.20 g g−1), oil binding (3.32 g g−1), foam stability (100%) and surface hydrophobicity (1250). Homogenization treatment resulted in the lowest particle size (142 nm), as confirmed by dynamic light scattering.
期刊介绍:
Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.