Oilseeds have potential food uses because of their high protein content. Besides, these proteins when added to a type of foods, supply desirable functional properties, such as whipping capacity and viscosity, emulsification and water and oil holding capacities. Rapeseed and soybean protein isolates
Foaming properties of oilseed proteins
β Scribed by Khalil, M. ;Ragab, M. ;El-Aal, M. H. Abd
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 368 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0027-769X
No coin nor oath required. For personal study only.
β¦ Synopsis
Foaming properties of oilseed proteins are important for the domestic market to be used in the preparation of various food products.
Whole rapeseed had the highest foam capacity followed by soybean, sunflower, safflower, glandless cottonseed, peanut and finally sesame. The extraction of lipids from oilseeds caused a significant improvement in their foam capacity and foam stability.
High positive correlation was found between soluble proteins and foam capacity of oilseeds. The foam capacity was high at pH 7, and decreased below it reaching a minimum at pH 4. The foam stability also varied with pH; being maximum at the isoelectric point and minimum at pH 7.
The foam capacity of oilseed protein isolates decreased with the prolongation of heating time at 100 "C.
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Table 1 Influence of acetylation degree on gelling properties of solutions of broad bean protein isolates Product Gel firmness Short characterization of the gel WaI Unmodified protein isolate 0.9 No gel, viscous pulp Acetylated protein isolate; acetylation degree z 68% 7.4 Soft gel, brittle structur