MODIFICATION PROPERTIES OF CONFECTIONARY FLOUR PRODUCTS WITH SYNBIOTIC
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Дата
2021
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Анотація
One of the main directions in the confectionery industry is creating new functional-purpose products. Besides meeting the dietary demand, they are supposed to be wholesome and health-giving. That is why so topical a task is enriching the composition of confections with synbiotics. They will have a positive effect on the manufacturing technology and impart physiological properties to final products.The paper studies how the synbiotic complex consisting of a synbiotic (microencapsulated bifidobacteria in a pectin matrix) supplemented with a prebiotic (inulin) determines changes in the structural and mechanical properties of flour confections, in particular, of fatty fillings for wafer biscuits. The mass fraction of inulin has been established after introducing 10, 20, and 30% of it into the filling to replace the equivalent amounts of fat. The quantity of bifidobacteria included in the recipe was determined considering the fact that in functional-purpose products, the physiologically active level of microorganisms should amount to 106–107 CFU/g of the intestinal contents.It has been studied how the synbiotic effects on the structural and mechanical properties of the fatty filling: its effective viscosity, adhesive strength, critical shear stress, and density. It has been found that introducing the synbiotic into the fatty filling and increasing the proportion of inulin adds to the effective viscosity in the test samples of the filling. Besides, the synbiotic makes the samples of filling stronger, which reduces the maturation time of wafer blocks. Thus, in the control sample, the blocks rest for 14 min, but in the test samples containing 10, 20, and 30% of inulin, this time is reduced to 12, 8, and 6 min respectively. With an increase in the mass fraction of inulin, the specific pull-off force has been established to decrease, as compared with the control sample.Experimentally, it has been revealed that there is dependence between the wafer filling density and the air phase characteristics (the size and number of air bubbles in the filling). It has been determined that the higher the density of the filling, the fewer air bubbles there are in the samples. The experimental findings prove that using the synbiotic in the wafer technology is practical.