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  • Title: Influence of Added Soy Presscake and Soy Flour on Some Physical and Sensory Properties of Corn Tortillas.
    Author: Wu M, Arntfield S.
    Journal: J Food Sci; 2016 Oct; 81(10):S2552-S2558. PubMed ID: 27561156.
    Abstract:
    Corn tortillas fortified with soybean presscake (SP) and defatted soy flour (SF) were studied and compared. Texture, including firmness and cohesiveness, and color, using a CIE L* a* b* , were determined instrumentally. Physical properties such as size, thickness, and rollability, were also investigated. A consumer acceptance test was conducted to evaluate the acceptance of tortillas at high levels of soy fortification (35% SF and 40% SP). Tortillas fortified with soy were found to be smaller and thicker with increased firmness and cohesiveness. Tortillas made with SF showed the poorest rollability, and were almost unrollable at high SF fortification levels (30% and 35%). Soy fortified tortillas were more red and yellow than control corn tortillas. In the consumer acceptance test, 40% SP and 35% SF had high overall acceptability scores (6 to 6.6 on a 9-point scale) based on all participants (n = 76). In addition, overall flavor and texture of both soy fortified corn tortillas scored above 6. Thus, while fortification with SP and SF had significant effects on tortilla size, thickness, firmness, cohesiveness, rollability, and color, these changes were acceptable to consumers.
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