No abstract

2-Benzylidene-3-methyl-4-nitro-2,5-dihydrothiophene 1,1-dioxide reacted with acyclic CH acids (acetylacetone, diethyl malonate, and its derivatives) according to the 1,4-addition pattern, whereas reactions of the title compound with cyclohexane-1,3-dione and 5,5-dimethylcyclohexane-1,3-dione (dimedone) were complicated by subsequent intramolecular heterocyclization leading to thieno[3,2-b]chromene derivatives.II, X = Y = CO 2 Me; III, X = Y = CO 2 Et; IV, X = COMe, Y = CO 2 Et; V, X = Y = COMe; VI, X = Y = CN.

The modern development of the food industry is accompanied by an increasing use of automated process control systems. The widespread use of automated control systems is caused by a significant economic effect, which is achieved by ensuring the specified qualities of the products produced regardless of subjective factors, reducing the loss of valuable products, reducing the labor intensity of production processes, and increasing the culture of production. The article presents a scheme of automation and energy saving of the technological process of production of functional beverages based on direct-pressed grape juice with increased nutritional and biological value due to the inclusion of feijoa and blackberry extracts in their composition. Monitoring of the technological process was carried out using a multi-channel stand. The main parameters of monitoring were the consumption of basic and auxiliary products; the temperature of pasteurization and cooling of direct-pressed juice and extracts from fruit and berry raw materials; the level of pulp and product in the tanks. The obtained experimental data and developed technological methods allowed us to offer an effective energy-saving technology for the production of high-quality functional beverages in the conditions of energy-saving management of the production process. To implement the proposed technology, a hardware and technological scheme for the production of functional beverages has been developed. Process monitoring allows you to reduce energy consumption by up to 30% by using modern automation and control tools.

This article contains a new approach to the problem of modeling devices for the sedimentation separation of two-phase systems. It is shown that, regardless of the separation forces of the phase (gravity, centrifugal), the separation efficiency decisive parameter is the velocity gradient of the carrier phase (collinear sedimentation velocity, determined by the difference in density and dynamic viscosity of the carrier phase). The theoretical consideration is complemented by experimental research on a models assemblage (with horizontal flow and vertical deposition), with the invariant value of the specified gradient of the horizontal flow velocity.

The article represents a three-year study of the effect of bioactive substances as part of growth promoting factors on the course of physiological processes in cucumber crops when grown under protected ground conditions (greenhouse) in the StavropolTerritory. The enhanced metabolism of the plants resulted in increase of crop yields. The studies revealed that the highest yield of cucumber exceeding the control by 14.7% was obtained at combined use of growth factors, namely Radifarm, Benefit, and Megafol.