A Study of The Functional Properties of Proteins Isolated From some Oil seeds | ||
| Journal of Tikrit University For Agriculture Sciences | ||
| Article 1, Volume 17, Issue 2, July 2017, Pages 260-271 | ||
| Authors | ||
| Reem Waleed Ayed; Ethar Zeki Naji | ||
| Abstract | ||
| This study included the isolate of protein from some oilseeds residue resulting after oil extraction , including sunflower, flax and safflower seeds and study of functional characteristics. the effect of pH on the solubility of proteins was studied with ranged from ( 2-10 ) result showed rise in solubility at alkaline extremist figures are higher than the figures acidic hydrogen extremist, where the maximum total solubility at pH (10) (84.58 and 80.82 and 90.21%) of isolated sunflower, flax and safflower respectively. Distinguish sunflower protein isolate was distinguish in water absorption of (6.25) ml . g-1, compared with an isolated flax and safflower (5.00, 2.25) ml . g-1, respectively, Flax protein isolate was showed highest ability to absorb fat (1.7 ml . g-1), compared with an sunflower protein isolate (1.5 ml . g-1) and safflower protein isolate (1.1 ml . g-1), respectively. emulsifying activity and stability was showed that the highest activity Safflower protein isolate (75.23%), followed by sunflower protein isolate and flax protein isolate (68.55 and 58.33)%, while the stability of the emulsion (58.0 and 45.50 and 44.00)%, respectively. the foam capacity and stability at different values of pH included (4, 5, 6 and 7), where the foam capacity was showed that the lowest at pH (4) was (30.33, 25.50, 22.75%), while the highest value was pH (7) where it was (57.80, 51.75, 44.23%) of sunflower protein isolate, flax protein isolate and safflowe protein isolater respectively, While it was observed a decrease in the foam stability of for all samples under study with the increase in time from 0.0 to 2.0 hours, noting the high stability of all samples at pH 7 and fall with lower pH where she was the lowest at pH 4. The results of the measurement of the viscosity (1.18, 0.83, 0.65) Melli Boys respectively. | ||
| Keywords | ||
| sunflower; flax and safflower seeds; functional properties; protein isolate | ||
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