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Molecular Entanglement and Electrospinnability of Biopolymers
Published on: September 3, 2014
Dissolution behavior of soy proteins and effect of initial concentration
Dora Y M Lui1, Edward T White, James D Litster
1Division of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia.
Journal of Agricultural and Food Chemistry
|February 27, 2007
Summary
Soy protein solubility, including glycinin and beta-conglycinin, shows a U-shaped pH trend. Higher initial concentrations unexpectedly increase dissolution, enabling protein separation.
Area of Science:
- Food Science
- Protein Chemistry
- Biochemistry
Background:
- Soy protein is a vital plant-based protein source.
- Understanding soy protein solubility is crucial for food processing.
- Glycinin and beta-conglycinin are major soy protein components.
Purpose of the Study:
- To measure soy protein and its components' solution concentration profiles.
- To investigate the effect of pH and initial concentration on solubility.
- To determine the feasibility of separating glycinin and beta-conglycinin.
Main Methods:
- Solution concentration profiles were measured for soy protein, glycinin, and beta-conglycinin.
- Experiments were conducted across varying pH levels and initial concentrations.
- Protein behavior (saturation/precipitation) was observed at different pH values.
Main Results:
- Concentration profiles exhibited a U-shaped trend with pH, minimizing at pH 4-5.
- Dissolution concentration increased proportionally with initial concentration, an unexpected finding.
- Beta-conglycinin remained soluble between pH 5-7, while glycinin precipitated.
Conclusions:
- Soy protein solubility is highly pH-dependent.
- The observed increase in dissolution with initial concentration requires further investigation.
- Differential solubility of glycinin and beta-conglycinin allows for their separation.
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