a b s t r a c tIn the present study

a b s t r a c t
In the present study, a protein isolate extracted from Arthrospira platensis by isoelectric precipitation was
evaluated for its functional properties. The maximum nitrogen solubility was 59.6 ± 0.7% (w/w) at pH 10.
The A. platensis protein isolate (API) showed relatively high oil (252.7 ± 0.3 g oil/100 g API) and water
(428.8 ± 15.4 g of water/100 g of API at pH 10) absorption capacities. The protein zeta potential, the emulsifying
capacity, the emulsion ageing stability, the emulsion microstructure and the emulsion opacity as
well as the foaming capacity and the foam stability were shown to be greatly affected by pH. Especially,
emulsifying and foaming capacities were positively correlated to the protein solubility. Moreover, the API
was able to form films when sorbitol (30% (w/w)) was used as plasticizer and to form gels when the API
concentration exceeded 12% (w/w).