When developing products for healthy and functional nutrition, much attention is currently paid to domestic raw materials of natural origin: fruit, vegetables, cereals and their processed products. In our region, one of these types of raw materials is apple. Apples are a source of nutrients for the human body: vitamins, minerals, organic acids, dietary fiber and pectin. They are the raw material for a large number of fruit and berry products, fillings for flour confectionery products, juice drinks, kissels, etc. During the production of these products, the so-called «secondary raw materials» remain, which are formed as a result of grinding, peeling, squeezing, grating, pressing and other technological operations. The study investigated the effect of addition of apple pomace in dried, crushed to a powdery state, and thawed (after deep freezing) form on the fermentation activity of yeast and the technology of wheat bread production with the addition of buckwheat flour. It has been established that the quality of the finished bread depends on the type of additive: fresh-frozen apple pomace improves the porosity and taste of bread to a greater extent.
This paper presents the results of studying the effect of dry-leaved Chamerion angustifolium (L.) Holub dry powder on quality indicators of wheat bread, in which part of the highest-grade wheat flour was replaced by 3, 5 and 10% of powder. The study showed that the addition of narrow-leaved powder in different amounts (3, 5 and 10% by weight of wheat flour) at the stage of cooking, the dough has a different impact on the quality indicators of the products. With the increase in the amount of the infusion of narrow-leaved powder, the organoleptic and physico-chemical indicators change: the color of the product changes from dark golden to dark brown, the presence of the additive increases in taste and smell, but the products have the correct form, without explosions and cracks, elastic, very soft crumb, with a thin-walled and uniform porosity. With an increase in the amount of the added additive, the porosity decreases, but it does not reach the lower limit of the standard. Acidity and humidity increase, which negatively affects the quality and reduced shelf life of the finished product. Therefore, it is proposed to use dry powder of narrow-leaved fireweed in the amounts of not more than 3% by weight of the flour. Studies have shown that during storage at the bakery product with a 3% additive of dry leaf powder for 72 hours, the total crumb strain is reduced by 32 units. AP-4/2 penetrometer, while in the control sample - by 44 units. Thus, the process of staling bread with the addition of narrow-leaved fireweed powder is slower than that of the control sample, and the recommended shelf life of the finished product is 72 hours.
Recently, the focus has been on the introduction of raw materials with a low glycemic index into the food industry, among which buckwheat and rice flour occupy a special place. The use of apple pomace in the bread recipe improves the organoleptic and physicochemical properties of the product. It also allows you to make adjustments to the traditional technology of bread production: to reduce the fermentation process by increasing the rate of formation of acids in the dough. The duration of the technological process for the production of bread with the addition of rice flour is increased by increasing the duration of soaking apple pomace in vegetable oil for better binding capacity in the future with rice flour and reducing the moisture content of the dough. In order to adjust the chemical composition, recipes for wheat bread were developed with a partial replacement for buckwheat and rice flour (sample No. 1 and sample No. 2, respectively) and the addition of 9.43% apple pomace. The introduced components will improve the structural and mechanical properties of the dough. The use of apple pomace and flour of cereal crops (buckwheat and rice) in the food industry makes it possible to enrich the chemical composition of bread with dietary fiber, vitamins of group B, K, mineral components (magnesium, calcium, iron, phosphorus, manganese, selenium). Vitamin B2 helps to absorb iron and, together with vitamin B1, helps to maintain the level of this trace element in the blood. From the results of the analysis of the vitamins, it follows that the finished product contains vitamins B1, B2, B5, B6 and K, which can be used for preventive nutrition. The use of food additives of plant origin in the formulation of wheat bread leads to an increase in the biological value of the product and a decrease in its calorie content.
The results of the influence of a dry powder obtained from Antonovka apples growing in the Kursk region on the consumer properties of crispbreads in which whole wheat and rye flour were partially replaced with apple powder in the amount of 10, 15 and 20% are presented. The optimal content of dried apple powder in baked samples of crispbread was determined during the experiment by the results of a study of organoleptic and physico-chemical quality indicators of samples. To assess the quality of the developed samples of crispbreads, an expert method was used to determine the weighting factors of product quality indicators. In the course of the calculations for experts, the most significant indicator was taste; the second by weight - appearance; the third is smell; fourth is form; fifth – color; the sixth is a view in kink. During the study of organoleptic indicators using a point scale, the largest amount of points (28.8 points) was gained by a sample of bread with the addition of 20% apple powder (it replaced 10% whole wheat and rye flour, respectively). This sample had an appearance interspersed with flavors and the presence of minor bubbles; pleasant taste and smell characteristic of apples; uniform color; rectangular shape; layered, with uniform porosity, without swelling, hardening, traces of an unbreakable appearance in a kink. The study of physical and chemical parameters made it possible to establish that with an increase in the amount of the additive (Antonovka apple powder), the mass fraction of moisture and acidity increase due to dietary fiber and acids that make up the apple powder.
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