Alien Algae Species Invasions in Humic Rivers within Weakly Human Impact Basin.

Increasing anthropogenic influence and climate change are leading to significant transformations in living conditions for indigenous representatives of aquatic communities. The problem of alien species invasions is actively discussed in the example of large rivers and water reservoirs, but medium and small rivers with weak anthropogenic influence have been insufficiently studied in this aspect. With the help of analysis of literary data and the results of our own long-term observations of phytoplankton using morphological and molecular genetic methods in some left-bank Volga tributaries, we identified six invasive species of different taxonomic groups of algae, with a predominance of diatoms.

Bioactivity Features of a Zn-1%Mg-0.1%Dy Alloy Strengthened by Equal-Channel Angular Pressing.

The structure, phase composition, corrosion and mechanical properties, as well as aspects of biocompatibility in vitro and in vivo, of a Zn-1%Mg-0.1%Dy alloy after equal-channel angular pressing (ECAP) were studied. The structure refinement after ECAP leads to the formation of elongated α-Zn grains with a width of ~10 µm and of Mg- and Dy-containing phases.

SOME ASPECTS OF MEDICAL REHABILITATION IN UKRAINE AND PROSPECTS FOR CHANGES IN REHABILITATION SERVICES IN THE WORLD.

Objective: The aim: To assess the situation, relevance and opportunities for providing medical rehabilitation services in Ukraine and to determine the current trends in the development of medical rehabilitation in the world.

Patients And Methods: Materials and methods: An analysis was made of WHO data on the prospects for the development of rehabilitation services, as well as the legal framework of Ukraine and data from the National Health Service on medical rehabilitation.

Conclusion: Conclusions: Demand for rehabilitation services is growing.

Effect of Rotary Swaging on the Structure, Mechanical Characteristics and Aging Behavior of Cu-0.5%Cr-0.08%Zr Alloy.

A study of the effect of rotary swaging (RS) on the microstructure and properties of the pre-extruded and pre-quenched Cu-0.5%Cr-0.08%Zr alloy was performed.

Structure Optimization of a Fe-Mn-Pd Alloy by Equal-Channel Angular Pressing for Biomedical Use.

In this work, a Fe-Mn-Pd alloy was produced by methods of equal channel angular pressing (ECAP) in order to obtain an alloy with a high rate of degradation for the development of biodegradable devices. Special efforts were made to the obtaining of an ultrafine-grained structure of alloys in a fully austenitic state at temperatures of 300 °C and 450 °C. Further investigation of its effect on the corrosion rate and mechanical properties was carried out.

Structure, Biodegradation, and In Vitro Bioactivity of Zn-1%Mg Alloy Strengthened by High-Pressure Torsion.

The effect of high-pressure torsion (HPT) on the microstructure, phase composition, mechanical characteristics, degradation rate, and bioactive properties of the Zn-1%Mg alloy is studied. An ultrafine-grained (UFG) structure with an average grain size of α-Zn equal to 890 ± 26 nm and grains and subgrains of the MgZn and MgZn phases with a size of 50-100 nm are formed after HPT. This UFG structure leads to an increase in the ultimate tensile strength of the alloy by ~3 times with an increase in elongation to 6.

A New Cryptic Species of the Genus (Chlorophyceae, Sphaeropleales).

A new species of green coccoid algae, Mychonastes hindakii sp. nov., was isolated from the River Moscow (Russia, Moscow).

Diversity of Silica-Scaled Chrysophytes of Two Tropical Islands: Phu Quoc and Con Son (Viet Nam).

The present paper focuses on the silica-scaled chrysophytes from two tropical islands: Con Son (Con Dao Archipelago) and Phu Quoc, located in Viet Nam. Electron microscopy revealed fifty-seven taxa, of which forty-one belong to the genus . The others are species of the genera (5), (8), (1), (1) and (1).

Synthesis and Antiviral Properties against SARS-CoV-2 of Epoxybenzooxocino[4,3-]Pyridine Derivatives.

The COVID-19 pandemic is ongoing as of mid-2022 and requires the development of new therapeutic drugs, because the existing clinically approved drugs are limited. In this work, seven derivatives of epoxybenzooxocinopyridine were synthesized and tested for the ability to inhibit the replication of the SARS-CoV-2 virus in cell cultures. Among the described compounds, six were not able to suppress the SARS-CoV-2 virus' replication.

Biodegradation of Resorbable Magnesium Alloys Promising for Implant Development.

Unlabelled: was to study the biodegradation characteristics and rate of magnesium alloys .

Materials And Methods: We studied the biodegradation of magnesium alloys Mg-Zn-Ca and WE43 (Mg-Y-Nd-Zr) in homogenized (initial) condition and after strengthening by mechanical processing using equal channel angular pressing (ECAP). The samples were incubated in a model system based on reference fetal calf serum (FCS) in the static and dynamic modes.

Anti-tumour activity of Mg-6%Ag and Mg-10%Gd alloys in mice with inoculated melanoma.

Cytotoxicity in vitro and anti-tumour activity in vivo of magnesium alloys Mg-6%Ag and Mg-10%Gd was studied. It was shown that specifically designed and thermomechanically processed Mg alloys produced a sizeable cytotoxic effect on PC-3 line tumour cells in vitro through inhibition of their proliferation. A pronounced grain refinement in combination with the formation of second phases and precipitates attained by means of equal-channel angular pressing (ECAP) accellerated the degradation and gave rise to enhanced anti-tumour activity of both alloys.

Phylogenetic relationships and status of taxa of and s.str. (Ranunculaceae) in north-eastern European Russia.

We studied the allopatric complex (L.) Mill. s.

Model of management by the quality of life of obese children.

Objective: The aim of the work is medical and social substantiation and development the model of management by the quality of life of obese children.

Patients And Methods: Materials and methods: Material processing was performed by using of mathematic-statistical methods: variance, correlation and regression analysis, mathematical prediction, modelling; the relative, average values and their errors were calculated as well as the predictive coefficients, and the odds ratios, which made it possible to obtain reliable data.

Results: Results: It was found that the real prevalence of obesity among children and adolescents in Kharkiv was significantly different from the official statistics in Kharkiv region (15,0 per 1,000 of infant population).

The Effect of Equal-Channel Angular Pressing on the Microstructure, the Mechanical and Corrosion Properties and the Anti-Tumor Activity of Magnesium Alloyed with Silver.

The effect of equal-channel angular pressing (ECAP) on the microstructure, texture, mechanical properties, corrosion resistance and cytotoxicity of two magnesium-silver alloys, Mg-2.0%Ag and Mg-4.0%Ag, was studied.

Interaction of Magnesium-Based Materials with Human Blood Cells and Culture of Human Diploid Cells In Vitro.

We studied morphofunctional properties of human blood cells and diploid culture cells exposed to different types of magnesium materials: pure magnesium (Mg), magnesium-yttrium-neodymium-zirconium alloy (Mg-Y-Nd-Zr) and magnesium-zinc-calcium alloy (Mg-Zn-Ca). The materials were incubated with donor blood and mesenchymal multipotent stromal cells over 3 days. The studied materials did not induce massive lysis of human erythrocytes and leukocytes in vitro, but gradually impaired their structural integrity.

Mechanical Properties, Biodegradation, and Biocompatibility of Ultrafine Grained Magnesium Alloy WE43.

In this work, the effect of an ultrafine-grained (UFG) structure obtained by multiaxial deformation (MAD) on the mechanical properties, fatigue strength, biodegradation, and biocompatibility in vivo of the magnesium alloy WE43 was studied. The grain refinement down to 0.93 ± 0.

Microstructure, Microhardness and Corrosion Resistance of WE43 Alloy Based Composites after High-Pressure Torsion.

The structure and properties of a composite consisting of Mg-Y-Nd-Zr alloy (WE43) and various oxides are studied. The particles of the WE43 powder were coated by the nanocrystalline oxide layer by means of a wet chemical deposition process. After that the powder is compressed into solid samples and deformed using high-pressure torsion at room temperature.

Analysis of the mortality rate among the population of the poltava region and the ways of its reduction.

Objective: Introduction: Saving and improvement of population' health is one of the main priorities of the policy in any country. Studying of the level and causes of mortality is a powerful tool for assessing the effectiveness of health care systems. WHO recommends using of the European classification of preventable causes of death that based on three levels of prevention.

Cytotoxicity of biodegradable magnesium alloy WE43 to tumor cells in vitro: Bioresorbable implants with antitumor activity?

In this study, a degradable magnesium alloy WE43 (Mg-3.56%Y-2.20%Nd-0.

[Molecular polymorphism of IB-fructosidase SUC genes in the yeast].

SUC gees encoding bea-fructosidase has been investigated in the yeast genus Saccharomyces. We have determined nucleotide sequences of subtelomeric SUC3, SUCS, SUC7, SUC8, SUC9, S UCO10 genes of S. cerevisiae and SUCa gene o:f S.

Genetic diversity study of the yeast Saccharomyces bayanus var. uvarum reveals introgressed subtelomeric Saccharomyces cerevisiae genes.

Intraspecies polymorphism of the yeast Saccharomyces bayanus var. uvarum was studied using the polymerase chain reaction with a microsatellite primer (GTG)(5). Sixty-nine strains of different origins were analyzed.

[Characterization of the genome of Saccharomyces yeasts from red berry wines].

Using restriction analysis of noncoding rDNA regions, multiplex PCR, and molecular karyotyping, we have examined Saccharomyces strains isolated from red berry wine materials in Russia, Belarus, and Ukraine. According to the molecular analysis, all strains belong to the species S. cerevisiae.