Modern high rate of life and unfavorable environmental situation increase stress, reduce active performance ability and health of the population. A relevant area of research is the search for effective ways to protect the body from oxidative stress, when free radicals destroy vascular walls, oxidize protein molecules, DNA, lipids. Oxidative stress can be reduced by consuming the right amount of antioxidants. The work is devoted to the study of antioxidant activity (AOA) of blue honeysuckle and black chokeberry juices and beverages. It was found that beverages based on fruit raw materials have higher antioxidant activity compared to mass soft drinks. It is shown that AOA of directly squeezed black chokeberry juice makes 9.009±0.061 mmol-eq/l, and blue honeysuckle–7.682±0.015 mmol-eq/l. Beverages based on mineral water with fruit juices have higher AOA compared to those prepared on technologically treated water (1.789±0. 069 and 1.667±0.013 mmol-eq/l respectively for blue honeysuckle and black chokeberry juices and beverages). During 7 days of storage the beverages show a slight decrease in AOA, on average ranging from 3.5 to 7.5%.
The results of the thermal modification of AG OV 1 and SKD 515 activated carbons under varied conditions (by atmospheric oxygen and in an atmosphere of nitrogen) are reported. It was determined that, on the thermal oxidation under selected conditions, the formation of surface oxygen compounds predomi nated over the process of their destruction. Upon thermal treatment in an inert atmosphere, oxygen contain ing acid type groups were removed from the surface of activated carbons or converted into pyrone (basic) and ether structures. It was shown that a change in the porous structure and the surface functional group compo sition of the activated carbons depends on not only the conditions of modification but also the properties of the initial carbon adsorbents. Heating in an atmosphere of air led to an increase in the adsorption of both ben zene and water vapors, whereas the heat treatment of activated carbons in the inert atmosphere increased the adsorption of only the nonpolar compound (benzene).
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