<p><strong>Aim:</strong> The paper looks at one of pressing problems of angiosurgery, the choice of plastic material to be used in reconstructive interventions and focuses on the response of biological tissues to implantation of vascular endoprostheses. <br /><strong>Methods:</strong> To do research on the study material, use was made of vascular dacron implant &amp; a woven double velour vascular endoprosthesis of polyester fibers and impregnated with modified gelatin. 60 Vistar rats (males) weighing 200-250 g were chosen as study objects. The animals were assigned to 4 groups according to the number of firms-manufacturers and the time of removing from the experiment (at 15 and 30 days). Under general anesthesia in the operating room, the rats’ skin and subcutaneous fat were dissected along the paravertebral line. Two pouches 3.5 cm deep were formed in the subcutaneous fat by blunt dissection. A 2x2 cm sample of the vascular patch was introduced into each pouch. The surgical wound was closed completely and treated with antiseptics. Histological preparations were stained by using a hematoxylin-eosin/Mallory technique. The obtained microphotographs enabled us to evaluate the structure of the connective-tissue capsule, as well as the content of its cellular layer. A cellular index, the relationship between fibroblast cells and inflammatory infiltrate cells, was calculated in each group. The indicator exceeding 1 demonstrated the predominance of reparative tendencies, if it was below 1, inflammatory changes prevailed. Statistical processing of the data obtained was performed by means of descriptive and variation statistical methods. <br /><strong>Results:</strong> Changes of inflammatory reaction phases proceed faster in the zone of implantation of dacron patches, which manifest themselves by a reliable increase in the quantity of resident cells from 62.4% to 80.5% and a decrease in nonresident cells by 1.7 times on the same terms respectively. The reaction of fabrics is more expressed to a polyester implant, which is confirmed by an insignificant decrease from 53.5% to 43.7% of the quantity of inflammatory infiltrate cells and a growth of fibroblast cells from 46.5% (at 15 days) to 56.3% (at 30 days). <br /><strong>Conclusion:</strong> The reaction of tissues of laboratory animals is less expressed to a dacron implant.</p>

The aim of the study is to identify the place and role of youth online communities in the design of ultraradical concepts of social networks. Some characteristics, aspects and trends of youth of destructive communication in the social network Vkontakte are given. Virtual communication is seen as a special form of social interaction on the Internet. The study is interdisciplinary. When studying the network virtual space, the authors used the structuralfunctional and social-cultural approach. The term "new media", which is regarded as an integral part of the Internet space was updated. Technological features of new media give the opportunity to effectively mobilize the people for any constructive or destructive actions. Social networks and media hosting are the main venue for the ultra-radical organizations, which use the technologies of information warfare, especially against young people, in the virtual space. Internet communication has some basic characteristics as interactivity, multimedia and autonomy. Not only conformal or non-political structures are the examples of social self-organization of young people, but also destructive communication strategy and communities in the network space. Destructive network type of communication goes from virtual reality to objective reality, which allows ultra-radical groups to begin asserting themselves in the Internet, and then to go beyond virtual reality and transform into various forms of extremist behavior of young people in real space. Ultra-radical content in the online space is destructive ideological concept, which lays the motives of political, ideological, racial, national, religious hatred, xenophobia or hatred against any ethnic, religious or social group.

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The article is devoted to the heritage of the Roerich family – Nikolai Konstantinovich, Elena Ivanovna, Yuri Nikolaevich, Svyatoslav Nikolaevich, and its role in the current sit­uation of world crisis, especially for the Eurasian geopolitical space. The authors substan­tiate the thesis that the political and cultural views of the Roerich family matured parallel to the movement of the Eurasians and in a number of aspects specify many their ideas. The authors reveal and explore the relevance and predictability of the key principles held by the Roerich family concerning the perspectives of Russia and the areas of Eurasian co­operation. In the legacy of the Roerich family, the main features of the impending global crisis are described in a visionary way. They saw a way out of the crisis in establishing the primacy of culture over economy, the primacy of the spiritual over the material. The Roerichs warned of the dangers of a barbaric relationship with nature, robotization and decomposition of consciousness. Their warnings about the dangers of a mechanical civilization are confirmed in the work of modern analysts. According to Roerichs, the ideal of cooperation and cooperation should become the basis of relations between peoples. The Roerichs emphasized the special importance of the Russian-Mongolian and Russian-Indian ties forming a geopolitical and spiritual “middle cross” of Eurasia. The commonality of the environmental, cultural and economic problems of the two great mountain regions of the Earth is a solid foundation for future cooperation between scien­tists in the space of Eurasia.