New TiNb-based alloys, such as Ti–6Al–7Nb, are currently being studied around the world as an alternative to other Ti alloys, e.g., instead of Ti–6Al–4V. We conducted a pilot study where thin (approximately 1.2 micron) CaP coatings containing low doses of Zn2+ (0.4–0.8 wt.%) were prepared by the radio frequency magnetron sputtering (RFMS) of Zn-hydroxyapatite (HA) target on Ti–6Al–4V and Ti–6Al–7Nb substrates and investigated their physicochemical properties, in vitro solubility, cytotoxicity, and antibacterial and osteogenic activities. The thickness of the obtained coatings was approximately 1.2–1.3 microns. Zn substitution did not result in roughness or structural or surface changes in the amorphous CaP coatings. The distributions of Ca, P, and Zn were homogeneous across the film thickness as shown by the EDX mapping of these elements. Zn doping of CaP coatings on both types of Ti-based alloys statistically influenced the results of the scratch-test. However, obtained values are satisfactory to use Zn-CaP coatings on biomedical implants. Increased Zn2+ release vs. tapered output of Ca and phosphate ions occurred during 5 weeks of an in vitro immersion test in 0.9% NaCl solution. Ti–6Al–7Nb alloy, unlike Ti–6Al–4V, promoted more linear biodegradation of CaP coatings in vitro. As a result, CaP-based surfaces on Ti–6Al–7Nb, compared with on Ti–6Al–4V alloy, augmented the total areas of Alizarin red staining in a 21-day culture of human adipose-derived mesenchymal stem cells in a statistically significant manner. Moreover, Zn–CaP coatings statistically reduced leukemic Jurkat T cell survival within 48 h of in vitro culture. Along with the higher solubility of the Zn–CaP surface, a greater reduction (4- to 5.5-fold) in Staphylococcus aureus growth was observed in vitro when 7-day extracts of the coatings were added into the microbial culture. Hence, Zn–CaP-coated Ti–6Al–7Nb alloy with controllable biodegradation as prepared by RFMS is a prospective material suitable for bone applications in cases where there is a risk of bacterial contamination with severe consequences, for example, in leukemic patients. Further research is needed to closely investigate the mechanical features and pathways of their solubility and antimicrobial, antitumor, and osteogenic activities.

Introduction. Personnel training for the tourism industry able to meet the challenges of its development in a particular region is one of the priorities of specialized universities. Digital technologies in a global creative economy require new approaches to the choice of training content and applied pedagogical technologies. The aim of the article is to develop and test the model of foreign language learning through the creation of professionally integrated Internet content, focused on information and advertising promotion of tourism products of the Republic of Karelia (Russian Federation). Materials and methods. The methodology is based on the comparative analysis of the data, formalized open and closed questionnaire surveys and expert assessment. A survey was conducted among 42 hospitality students of Petrozavodsk State University (Russian Federation). Results. The experimental training in group interaction creating a digital professionally oriented product stimulated the formation of digital, communicative and soft skills. Comparative analysis of the obtained data revealed a high level of development of these competencies among the experimental group students. Their indicators were significantly higher (p=0.0001) in the skill of creating a digital tourism media product and in the ability to interact in a team (φemp =3.655, p≤0.01), as well as in presentation skills for tourism product promotion in a digital environment (φemp =1.878, p≤0.05). Discussion and conclusion. The conducted research revealed the effectiveness of the author's methodology of English teaching in a professionally integrated digital environment for the development of skills that ensure competitiveness in the hospitality industry. Recommendations for intensification of teaching foreign languages in tourism through individual and group interdisciplinary digital projects are offered.

Aim: to review current scientific literature concerning the main advances and problems of magnesium (Mg) alloys for traumatology and orthopedics. Methodology of the study. Analytical review based the comprehensive investigation of public scientific and technological sources. Results of the study. Modern knowledge about classification, in vitro and in vivo biodegradation, biomechanics, local and general biocompatibilities, clinical efficacy, and hazards of infectious complications in conditions of osteosynthesis with implants made of Mg alloys with or without protective (anticorrosion and antimicrobial) coatings is presented. Conclusion. Fast degradation and a risk of periprosthetic infection strongly limit clinical application of implants made of Mg and its alloys. Development of novel Mg alloys and their modification by incorporating antimicrobial elements into their body or protective coating is a promising direction to control biomedical characteristics of Mg alloys.

increase in the level of weekly physical activity of medical students of HEI by application of various forms of physical education training.

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