Another study from SALGADO et al. (2012) researched the functional properties of
sunflower protein concentrates with different content of phenolic compounds. They
obtained these concentrates from sunflower oil cake. The concentrates showed high
water solubility and moderate water-holding capacities. Foams and emulsions of
different stability at different pH and self-supporting gels produced by thermal
induction, were obtained. Phenolic compounds were not only responsible for
antioxidant activity and changing colour of the protein products, they also reduced the
stability of the emulsion and the hardness of protein gels. But they did not influence
the water holding capacity, the water solubility or the foaming properties and because
of this, sunflower protein products may be used as functional ingredients in foods
[SALGADO et al., 2012].