Special importance in modern unfavorable environmental conditions is given to nutrition, which should ensure the weakening of the negative effect of harmful eco-factors on the human body, contribute to increasing its protective and adaptive capabilities, and, as a result, reduce the risk of developing various pathologies. At the same time, it should be taken into account that the diet of a modern person should be rich in biologically active components that can exhibit antioxidant properties. Recently, scientists are increasingly considering plant extracts as sources of antioxidants. Among them, a special role is assigned to Sorbus aucuparia, whose antioxidant activity is described as comparable, or even higher than other fruits. The article presents data on the study of the antioxidant activity of water extracts of mountain ash by biotesting. The antioxidant activity was evaluated using a biological model – Paramecium caudatum, determining the stress resistance of infusoria to hydrogen peroxide. The study revealed an increase in the stress resistance of Paramecium caudatum infusoria when adding extracts of mountain ash to the nutrient mixture compared to the control.
This article presents the results of biodiagnostics of activated sludge formed in the wastewater of organic synthesis plants. They are characterized by changes in the concentrations of control pollutants (phenol, non-ionic synthetic surfactants, glycols), as well as chemical oxygen demand in a fairly wide range, which negatively affects at the activated sludge state and does not allow to achieve the regulatory requirements for the quality of treated wastewater. In this paper, the state of active biomass in the process of biological wastewater treatment was evaluated using three quantitative assessment systems: a five-point scale, hydrobiological indices of biodiversity Shannon and Cuba. The paper presents a comparative analysis of systems for quantifying the state of activated sludge, that are recommended for use in water treatment practice, both for simple systems, in which only one control factor affects the state of activated sludge, and for complex systems, that include the impact of a large number of control ecotoxicants on the activated sludge ecosystem. It is shown that in quantitative terms, the established regularities of the influence of control pollutants on the state of activated sludge differ: the five-point evaluation system, in comparison with the Shannon index, reflects deeper changes in the state of the biocenosis, because it evaluates not only the number of hydrobionts, but also their state, as well as the state of activated sludge flakes and the liquid above it. However, the assessment of the activated sludge state by the Cube index revealed a quantitative discrepancy in the change of this index compared to the aforementioned, which suggests that it is not appropriate to use it to describe the dynamics of changes in the state of the bioagent in the process of water treatment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.