Phospholipids and hydrolysates from a sunflower protein isolate adsorbed films at the air–water interface

Physico-chemical properties of surfactant and protein films

“…Both the SA and AE of mixed films are improved by the presence of phospholipid as the adsorbed SPI and its hydrolysates saturate the monolayer at the higher protein concentrations in the bulk phase. In addition, the presence of phospholipid also improves the SA of proteins at the lower protein concentrations in the bulk phase [27]. These results are of practical importance for the formation and stability of dispersed systems because the higher protein concentrations studied here coincide with the limit of solubility of SP hydrolysates [26].…”

“…The adsorption isotherms of pure enzyme-induced sunflower protein isolate (SPI) [26] and in mixed systems with phospholipids have been analyzed [27]. The surface activity (SA, the maximum surface pressure) and the adsorption efficiency (AE, the protein concentration at SA) are affected by the degree of hydrolysis (DH).…”

“…The dynamics of adsorption and surface dilatational properties of SPI hydrolysates depend on DH and on the protein concentration in the aqueous phase [27]. Sunflower protein isolate and its hydrolysates are adsorbed at the air-water interface with different degrees of association at different concentrations in the bulk phase.…”

Structural Characteristics of Dipalmitoylphosphatidylcholine and Hydrolysates from Sunflower Protein Isolate Mixed Monolayers Spread at the Air−Water Interface

“…Equilibrium spreading pressures of DPPC and SPI hydrolysates at 20°C were measured by the Wilhelmy plate method as described elsewhere. 28,33 These are included in Table 3. 28,33 Results and Discussion…”

“…Equilibrium Surface Pressure (π e ) for DPPC33 and SPI Hydrolysate28 Spread Monolayers at the Air-Water Interface, at 20°C and at pH 7 SPI hydrolysate at DH ) 5.62% 29 SPI hydrolysate at DH ) 23.5% 22 SPI hydrolysate at DH ) 46.3% 23 Figure 1. (A) Surface pressure-area isotherms (compression curves) for spread SPI hydrolysate at DH ) 5.62% and DPPC mixed monolayers.…”