The technology of production of edible food packaging based on Apple puree with the addition of 25, 50 and 75 % of Apple, grape and tomato pomace. The physical and chemical properties of the resulting edible packaging – humidity, water absorption, resistance to different nature of liquids, microscopy and organoleptic evaluation of samples. The influence of the concentration of used Marc on the organoleptic characteristics of edible packaging. The correlation between moisture and water absorption of edible packaging based on Apple puree with the addition of Marc is determined. High resistance of the investigated package to various model liquids is established. The research results show the high potential of the developed packaging as a replacement for traditional disposable polymer packaging materials. Edible packaging based on food production wastes - the extract from the processing of fruits and vegetables not only has a reduced cost, but is also partly a solution to a common environmental problem - recycling.
The objects of study were chokeberry berries, mashed chokeberry berries, snacks sublimated from chokeberry, and snacks sublimated from chokeberry with the addition of 5% pectin. Organoleptic indicators, soluble solids, sugars, titratable acidity, content of vitamin C, dietary fiber, total phenolic content, flavonoids, anthocyanins, anti-radical activity by DPPH method, restoring ability by FRAP method were determined for the studied samples. Determination of the total content of flavonoids, anthocyanins and phenolic substances, as well as the restoring activity of the studied samples as indicators characterizing the antioxidant activity of the compounds, showed the positive effect of grinding as mechanical processing and freeze-drying as heat treatment on the antioxidant properties of chokeberry. As a result of determining the content of dietary fiber, soluble solids, sugars and titratable acidity, antiradical properties in the studied samples, an increase in the values of these indicators by 3-6 times in the process of freeze-drying was revealed, which shows the feasibility of using this type of heat treatment in the production of functional products based on chokeberry. Determination of the vitamin C content in the test samples allows us to conclude that the freeze-drying has a negative effect on the vitamin C content in aronia. A methodology for organoleptic evaluation of a new type of freeze-dried snacks based on mashed chokeberry is developed. It has been established that a new kind of snacks has high organoleptic characteristics, which makes their production a promising direction.
The kinetics of dissolution of iron oxides FeO, α-Fe2O3 and Fe3O4 in orthophosphoric acid, including those containing additions of Fe (II) and Fe (III) ions (in the form of perchlorates), has been studied. The values of the stationary potential in the magnetite electrode system--solutions of orthophosphoric acid, including those containing additions of Fe (II) and Fe (III) ions are determined. The dissolution of Fe3O4 in orthophosphoric acid has been studied and described. Based on the experimental results, it was established that the stimulating and inhibitory effect of Fe (II) and Fe (III) ions is related to their effect on the value of the potential at the boundary of the iron oxide phases/electrolyte solution. The orders of reactions for ions Fe (II), Fe (III) and H3PO4 are determined
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