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Published on: November 18, 2022
Effects of leavening agent and time on bread texture and in vitro starch digestibility
Angeles Garcia-Hernandez1, Cesar Roldan-Cruz2, Eduardo J Vernon-Carter3
1Facultad de Ciencias Químicas, Universidad Veracruzana-Región Xalapa, Calle de La Pérgola S/N, Zona Universitaria, 91000 Xalapa, VER México.
Abstract:
Wheat dough added with baking dried yeast (BDY, 5 g) or baking powder (BP, 5 g) was leavened for 0, 2, 4 and 6 h for producing white bread (BBDY or BBD, respectively). The specific volume of BBDY was higher than for BBP. FTIR analysis revealed that BBP reduced the short-range crystallinity of starch granules, an effect magnified by the leavening time. Hardness and cohesiveness were higher for BBDY than for BBP which had a fragile crust structure. Readily digestible starch content of BBDY decreased (16.1-10.8%), while that of BBD increased at (17.1-31.5%) with leavening time. The opposite trend was found for resistant starch which increased from 71.2 to 79.1% for BBDY, and decreased from 69.3 to 40.2% for BBD. The hydrolysis rate constant for bread made with BP (~ 4 min-1) was about twofold faster than for BBDY.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s13197-021-05206-1.
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