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The aim: The aim of the study was to determine the level of bacterial contamination of mobile phones and watches of dentists. Materials and methods: The study was conducted at the University Dental Clinic and Microbiology Laboratory at the Department of Genetics, Plant Physiology and Microbiology of Uzhhorod National University. Swabs from the investigated surfaces of 30 mobile phones and 30 watches were collected using disposable sterile cotton swabs moistened with sterile saline. The clinical isolates were isolated with the use of differentially diagnostic nutrient media. Results: Studies have shown that cell phones are contaminated with pathogenic microorganisms to a much greater extent than watches. 1518 CFU were isolated from mobile phones, while 375 CFU from watches. The dominant representatives of the microflora of the studied objects were gram positive bacteria of the genus Staphylococcus. Comparative characteristics of the species composition of bacteria of the genus Staphylococcus isolated from mobile phones and watches showed that the dominant species isolated was S.epidemidis. Therefore, studies have shown a high degree of contamination of mobile phones with coagulase-positive bacteria of the genus Staphylococcus, which in most showed hemolytic properties. Conclusions: The patterns identified indicate that mobile phones can play a role in the spread of opportunistic infection.

The aim of the study was to determine the effects of genotype and sex on carcass composition and selected meat quality parameters of Dworka and Pekin ducks after two reproductive seasons. The research material consisted of 24 carcasses of Dworka ducks (breeding strain D11) and 24 carcasses of Pekin ducks from the herd of genetic resources (French Pekin, strain P-9). After cooling the carcasses (18 h, 2 °C), the pH values and electrical conductivity of the pectoral and leg muscles were determined, and then the carcass was dissected using a simplified method. After dissection, the pectoral and leg muscles were sampled for quality characteristics assessment. The Dworka ducks from breeding strain D11 compared to Pekin duck from conservative strain P9 were characterized by significantly (p < 0.05) higher carcass weight, protein and salt content, thermal drip, yellowness, thickness of perymisium and endomysium and lower water content of the pectoral muscle. Dworka ducks were also characterized by higher protein, salt and collagen content and higher electrical conductivity (EC24) of leg muscles than Pekin ducks. Regardless of genotype, male ducks had a higher gutted carcass weight with neck, salt content, muscle fiber cross-sectional area, fiber perimeter and diameters of pectoral muscle, and also higher protein and collagen, and lower fat content, pH24 and electrical conductivity of leg muscles. The genotype by sex interaction was significant (p < 0.05) for water, protein, fat content, perimisium thickness, cohesiveness, springiness of the pectoral major muscle, and for water content and protein of the leg muscles. The results obtained in this study demonstrate the effects of genotype and sex on the nutritional value and some technological parameters of duck meat. The studied ducks after two reproductive seasons satisfactorily meet the requirements of duck meat for consumers and duck meat processing plants.

The blood analysis of the great tit in a protected area of National Nature Park “Homilshanski Forests” (Kharkiv Region, Ukraine) was performed in the age-related dynamics of its postembryogenesis. Using our own method, developed for collecting venous blood from the eye sinus, the identity of leukogram percentages between the literary data and our obtained results was established thereby providing evidence in favour of the application of our development. Erythrocytes were studied with the help of the micronucleus test, which results reliably testify that the studied birds were not exposed to any chemical or physical contamination. No parasitic infections were found in blood smears. Further improvement of the blood taking method is planned in order to collect samples for biochemical and genetic analyses

We studied the effect of immunogens of the leukemia virus in cattle on the cytogenetic parameters of bone marrow in the dynamics of immunogenesis. We found that each drug has its own specific effect, which is due to the structural differences of the leukemia virus in cattle. The method of cytogenetic studies of bone marrow cells should be used to assess the safety and immunogenic properties of retroviral origin drugs

In the article we investigate the socio-economic efficiency of land use in agriculture. The peculiarities and tendencies of development of land relations in the conditions of a multi-faceted economy are established. The main indicators of land use efficiency are analyzed: crop yields and gross output of all categories of farms per 100 hectares of agricultural land. The economic and legal aspects of the modern land use in the conditions of the final stage of the reformation of land relations are determined. We analyzed the legal and regulatory framework for land tenure and possession (Law of Ukraine on Land Conservation, Resolution of the Cabinet of Ministers of Ukraine “On Approval of the Norms of Optimal Crop Relations in Crop rotations in Various Natural-Agricultural Regions”, Procedure for the Development of Land Management Projects, Providing Ecological and Economic substantiation of crop rotation and landscaping). We outline the problems of raider seizure of agricultural land. We substantiated the prospects for further transformation of land use in the conditions of the formation of the land market.

In this work the age reduction of the third molars is investigated