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When separating (cleaning) lightweight seed mixtures with the help of vibratory machines, there is an issue related to the harmful effect of air movement in the gaps between parallel working surfaces of vibratory machine units. This factor is particularly harmful to seed material, which is sensitive to air movement (some medicinal and vegetable crops). To address this issue, the design of vibratory machines is changed while their operational regimes are configured accordingly. This requires many full-scale experiments and (or) time-consuming personal computer-based simulation of the working processes of the vibrational motion of such seed mixtures. This paper proposes several regression models that make it possible to replace time-consuming numerical modeling with simple analytical expressions (regression equations). These equations are used for a quantitative assessment of the degree of influence of aerodynamics on the kinematic parameters of the vibrational motion of particles of seed mixtures. The assessment is derived depending on the geometric characteristics of the aerodynamic screen, the design of the unit, and the amplitude of oscillations of the working surfaces of a vibratory machine. The models take the form of equations of multiple linear regression of the second order, obtained on the basis of a series of numerical experiments. The processes of vibration movement of the seed material of parsnips, lettuce, and fragrant dill were investigated. The coefficient of determination equaled 0.956...0.967. The results reported here are useful for the construction of algorithms to optimize the design and adjust the operating modes of vibratory separators according to the criterion of minimizing the harmful effects of the aerodynamic factor

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This article describes main methods of using the method of microwave treatment in food industry and in grain processing in particular. Main principles of this technology as well as using this technological approach for popping grain have been considered. Scientific works aimed at researching possibility of using microwave radiation for preparation of popped grains have been reviewed. Factors influencing the process of preparing popped grain have been considered; these factors include morphological structure and chemical composition of grains.Sorghum is one of the main food crops in the world agriculture (especially in such countries as India, PRC, Ethiopia, Morocco, Sudan) taking agriculture areas of about 50 million hectares. Popularity of growing sorghum in Ukraine can be explained in particular through its ability to produce high yields in warm and dry climatic conditions. Human organism does not perform absorption of nutrients from sorghum in full amount due to the fact that there are kafirins in endosperm of sorghum and these substances agglutinate starch granules. That is why a peculiar attention in this article has been paid to influence of microwave treatment on digestibility of sorghum starch and proteins.The goal of carrying out scientific researches consisted in defining parameters of microwave radiation influence on the process of popping sorghum grains depending on grain particle size (fractional composition) as well as in developing a technological scheme of popping sorghum.The process of microwave treatment of sorghum grains has been researched. Microwave processing of grains was performed in microwave oven with working frequency of 2,450 MHz and the following levels of power were applied: 450, 600, 700 W with exposure time 120-150 s. Grain sorghum "Fulgus" was used for carrying out the research. Effect of microwave radiation on the start of the popping process and on yield of popped sorghum previously divided into two fractions has been determined. In addition to this influence of microwave treatment on increasing the volume of coarse fraction and fine fraction sorghum grains has been determined.A technological scheme of producing popped sorghum with using microwave treatment has been developed. This technological scheme includes the following operations: cleaning grains from various contaminations, calibration, conditioning, microwave treatment, cooling, optical sorting, packing. The technological process within the developed technological scheme has been described and a clear sequence of operations for preparation of popped sorghum has been provided. The proposed technological scheme has two variants of execution. The first variant consists in using air-sieve separators and concentrators or combined machines for cleaning and calibration of sorghum grains. The second variant consists in combining procedures of cleaning and calibration into a single stage with a help of up-to-date technological equipment.

The market for gluten-free cereal bars as food concentrates and promising food products was studied from the focus of their dietary properties and a functional purpose. The range of grain bars made up 12% of the total food concentrates market in Ukraine and only about 1% of which was devoted to gluten-free grain bars. The main component of both domestic and foreign grain bars included the various products of grain processing. The range of grain bars of domestic and foreign production was analyzed in terms of their component composition and positioning on the market, and then classified into four groups: bars enriched with vitamins; bars with added flavorings and preservatives; bars with sugar substitutes popular among domestic producers; bars with the addition of palm oil, typical for export products. The grain bars of Ukrainian producers were characterized by addition of flax, chia, amaranth, pumpkin, hemp processed products into the composition of gluten bars, but in small quantities. The addition of dried fruits and berries, such as cherries, cranberries, apricots, and grapes, was also popular among domestic manufacturers. Overwhelming majority of the domestic producers used a mixture of four types of cereal flakes as the grain base, namely: oat, wheat, barley and, corn flakes. Taking into account a need in alternative plant resources for the wholesome bars, sorghum, amaranth, flax grain processed products are excellent for the development of gluten-free products. Effect of these non-traditional raw materials (pop sorghum, pop amaranth, flax meal, walnut cake, etc.) on the quality of the grain bars was studied. The use of these ingredients contributed to the enrichment of the grain bars with essential macro-and microelements, lysine, polyphenols, lignin, and vitamins. The developed gluten-free grain bars showed the high consumer qualities; therefore, they are capable to meet the growing demand for gluten-free food products among consumers, providing to widen the range of the grain bars on the Ukrainian market.