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Recently, more and more attention is paid to the possibility of purifying the aquatic environment of the aquatic environment with a variety of plants capable of acting as natural purifiers. According to the literature, one of the most promising water purifiers is a species of water hyacinth. Other authors believe that the water hyacinth is a dangerous invasive species due to its rapid growth and ability to migrate long distances. At the same time, the climatic conditions of Ukraine provide a fight against the invasion of water hyacinth due to low temperatures in winter. Literature sources indicate that eigornia is able to effectively purify water from contaminants such as oil, acetone, phenol, formaldehyde and surfactants. The purpose of this study is to study the effect of aqueous extract of Igornia most beautiful on such organopathogenic microorganisms as Escherichia coli, Staphylococcus aureus, Proteus vulgaris, Pseudomonas aeruginosa, Candida albicans, which may be representatives of the allochthonous group of bacteria. To assess eichhornia as a purifier of bacterial contaminants, a comparative study of the antibacterial activity of layered pistachio and aboriginal Ukrainian species of duckweed. Our own observations and literature data indicate the invasion of eichhornia and pistachios in the Dnieper and Kozynka rivers. All three species compared in the study are producers of green biomass, which can be used as feed for animals and birds. Recently, the literature discusses the possibility of using duckweed as a food plant. The study was performed by disco-diffusion method. The results of the study show that all the studied plants have antibacterial activity against Escherichia coli (growth inhibition zone 8-13 mm) and antistaphylococcal activity (inhibition zone 10-13 mm). To evaluate the medicinal properties of the studied plants, we compared the obtained data with the values of the diameters of the lysis zones for a number of antibiotics. Regarding Escherichia coli, the inhibition zone of 13 mm in duckweed and eichhornia is close to the similar zone of ampicillin – 16 mm and kanamycin – 17 mm, rifampin – 8-10 mm. That allows to consider all investigated plants as an effective component in sewage treatment plants. As small duckweed has fungicidal activity against Candida white, it can be recommended as a component of sewage treatment plants for milk processing enterprises.

A technological process is developed for friction stir processing of surface layers of the parts from magnesium and aluminum alloys for the purpose of their modifying aimed at formation of a layer of fine-grain structure (of 1.2-4.5 μm) that is 16-63 times lower a grain size of base metal (75.8 μm). Formation of microcracks is shown at the interface of EB-weld metal and base metal of magnesium alloy ML10 as well as their absence in welding through intermediate zone with FS-modified fine-grain structure. It provided for the possibility of increase of strength of EB-welded joints from ML10 alloy. [ABSTRACT FROM AUTHOR]

A technological process was developed for friction stir processing of surfaces of parts from magnesium and aluminum alloys for structure modification directed on formation of layer of fine-grain alloy structure (grain size 1.2-4.5 mm) that is 16-63 times less than the initial metal grain size (75.8 mm). It is determined that the maximum temperature of alloy heating in zone of contact interaction of a tool with FS-processed layers of the samples from researched alloys has reached 340-380 °C. Analysis of effect of kinetic parameters of the tool on change of microstructure of modified surface layers of the parts and welded joints was carried out. [ABSTRACT FROM AUTHOR]

The influence of proteins (bovine serum albumin, BSA, and mouse γ-globulin, IgG) physically adsorbed or covalently attached via coupling with N-cyclohexyl-N′-(2-morpholinoethyl) carbodiimide methyl-p-toluenesulfonate, CMC, to the surface of activated carbon SCN (spherical carbon with nitrogen) on the mobility of interfacial water molecules was studied by means of 1H NMR spectroscopy with freezing-out of bulk water at 180