3.2.4. Emulsion capacity (EC)
Emulsion properties of the samples are shown in (Table 2).
Proteins are commonly used as emulsion forming and stabilizing
agents. Carbohydrates can not produce emulsion by themselves,
but might affect emulsion properties (Koksel et al., 2008). Therefore,
the effects of pumpkin flours on the emulsifying properties of
albumin solutions were investigated.
Emulsion capacity value of albumin solution was found to be
20.96 mL 100 g1. Emulsion capacity values of albumin solution
supplemented with pumpkin flours were significantly (p 0.05)
higher (51e53 mL 100 g1) than those of the albumin solution on
its own (Table 2). The pumpkin flour samples positively affected the
emulsion properties of the albumin. Emulsion capacity of albumin
solution supplemented with the freeze-dried pumpkin flours were
slightly higher than those of the hot-air oven dried pumpkin flours.
Similarly, EC levels of the samples prepared without metabisulfite
pre-treatment were slightly higher as compared to the samples
with metabisulfite pre-treatment. The higher EC values of these
samples (Table 2) can be attributed to their higher total dietary fiber
content (Table 1). Du, Jiang, Yu, and Jane (2014) reported that the
protein content of lentil flour was the highest among the legume
flours but its emulsion activity was poor, such variation may be
related to the other components in the flours.