Invertebrates in the gradient of different age soils under a birdcliff at the Grønfjord Area (Svalbard, Arctic)

The aim of this study was a preliminary analysis of the distribution of microarthropods (Oribatida, Collembola) and herpetobiontic invertebrates (Aranei, Coleoptera) in soils of different ages under a seabird colony in the vicinity of the Barentsburg settlement (Svalbard). Two transects were established for the sampling: 1) along the slope under the birdcliff in the height gradient from 50 to 100 m a.s.l.; 2) along the slope of the foothill terrace with typical tundra vegetation in the height gradient from 90 to 150 m m a.s.l., where invertebrates were collected by pitfall-traps. Soil samples were taken for the radiocarbon age dating of soils under birdcliff. We collected 389 specimens of invertebrates in both habitats. The formation of bird colony began over 1000 years ago. The highest activity and species diversity were on the slope plot where the radiocarbon age of the soil was about 400 years. The abundance and species structure of invertebrates differ significantly between the two habitats. The invertebrate community is more diverse in the ornithogenic habitat and includes invertebrates of different trophic level, including predators (spiders and rove beetles). Already known for Svalbard 5 species of oribatids (Diapterobates notatus, Ceratoppia sphaerica, Hermannia reticulata, Oribatula tibialis, Tectocepheus velatus), 4 species of spiders (Hilaira glacialis, Erigone arctica palaearctica, E. tirolensis, Mughiphantes sobrius), 7 species of springtails (Hypogastrura viatica, Desoria tshernovi, Folsomia quadrioculata, Isotoma anglicana, Lepidocyrtus lignorum, Sminthurinus сoncolor, Sminthurides malmgreni) and 2 species of rove beetles (Atheta graminicola, Boreophilia subplana) are collected. A new locality has been registered for the rare spider Erigone tirolensis

Indices of dental health in children and adolescents from Saratov and the Saratov region

<p>Objective: to determine the level of dental health in children and adolescents living in the Saratov region. Material and methods. To assess the intensity and prevalence of major dental diseases 1510 patients have been examined by the method recommended by the WHO Collaborating Centre in Russia. Results. A comparative analysis of caries and occurrence of different types of teeth-maxillary anomalies among children aged from 3 to 18 years. Conclusion. The epidemiology of major dental diseases in the Saratov region is characterized by the significant spread of caries from 70 to 94,6% in the different age groups. The proportion of people with malocclusion among the surveyed reaches 46,6%.</p

Молочная железа и пубертат: взгляд гинеколога

In article the review of the literature devoted to a problem of diseases of a mammary gland at teenage age is presented, to possibilities of their treatment and prevention.В статье представлен обзор литературы, посвященной проблеме заболеваний молочной железы в подростковом возрасте, возможностям их лечения и профилактики

Cross-Cultural Study of the Characteristics of Students' Self-Concept

Personal Self-concept can be viewed as an antecedent of ones&rsquo; educational and career achievements. It is a complex multidimensional construct. This study examines aspects of academic self-esteem: mathematical and verbal. An important factor influencing the formation of self-esteem is the environment &ndash; cultural values and economic development of the country. Previous empirical studies have shown differences in overall self-esteem among individuals from individualistic and collectivistic cultures. We decided to investigate self-esteem in more details and consider the differences and similarities in self-esteem by two factors "Mathematical self-esteem" and "Verbal self-esteem" of students from Russia and Kyrgyzstan. These countries share a common historical background and a similar educational system, but differ at the cultural level. This pilot study was conducted among students from Russia and Kyrgyzstan, using the questionnaire "Self Description Questionnaire". The research sample included 510 undergraduate students aged 18 to 27 years (60% &ndash; Russia, 40% &ndash; Kyrgyzstan). Statistical analysis of the data was performed using Cohen's d to determine the effect size for significant differences between the means. The results of the study indicate a higher level of mathematical self-concept among students from Russia, which can be explained by differences in cultural dimensions &ndash; individualism and collectivism. At the same time, no significant differences in verbal self-esteem were found. This is due to its complexity. So, the communicative aspect of verbal self-esteem is more pronounced in the Eastern culture, and the speech aspect &ndash; in the Western one.</p

MAIN FEATURES OF YOUTH JARGON: SYCHRONIC ANALYSIS

The article deals with synchronic analysis of the main characteristic features of youth jargon and their historical determination. The authors disclose and compare such terms as “youth jargon”, “youth slang”, “argot” and analyze some tendencies in their studies

Obtainanig and study of the material based on hydroxyapatite and polycaprolactone for extrusion three- dimensional printing

The work is devoted to the search for a scientific and technical solution for the creation of filaments based on hydroxyapatite and polycaprolactone for extrusion three-dimensional printing. Hydroxyapatite powders were obtained by chemical precipitation using microwave radiation, and the average particle size in the powder was determined. Options for creating a filament by extrusion based on a composition of hydroxyapatite and polycaproloctone for subsequent printing of scaffolds (temporary scaffolds necessary for the formation of new functional tissues) are proposed. Images of the surface of calcium hydroxyapatite were obtained using a scanning probe microscope to assess the parameters of surface roughness, which is one of the most important factors for successful cell adhesion to the scaffold surface during osseointegration processes

Government support of small businesses in the 2020 crisis conditions from the market approach viewpoint

The paper offers a situational overview of small business as a driver of economic growth in Russia during the 2020 crisis and the main aspects of current state policy on market-based support of that sector. The analysis also highlights major barriers that have arisen lately impeding the efficiency of governmental efforts to support small business. However, new aspects stimulating business development in market economy emerge together with the obstacles

Forest lands of industrial regions as an object of system monitoring and comprehensive assessment in modern conditions

The forest lands of industrial areas as an object of system monitoring and comprehensive assessment in modern conditions are represented in the form of natural objects, as a part of the ecological environment, as a subject of legal regulation of the land and forest relations