Specific Absorption Rate of Assembly of Magnetite Nanoparticles with Cubic Magnetic Anisotropy

The presence of strong magnetic dipole interaction in assemblies of fractal clusters of nearly spherical magnetite nanoparticles, which arise in a biological media loaded with magnetic nanoparticles, leads to a significant decrease of the specific absorption rate of these assemblies in alternating magnetic field. However, the specific absorption rate of the assembly can be increased if the nanoparticles are covered by non magnetic shells of sufficiently large thickness comparable with the nanoparticle diameter. Keywords: Magnetite nanoparticles, Magneto- dipole interaction, Specific absorption rate, Numerical simulatio

Forming of Students Valeological Culture in Studying of Natural-Science Disciplines (by Example of Physics Course)

The article is devoted to the problem of valeological culture education in the process of studying of natural-science disciplines at school. The importance of developing skills aimed at the development of a healthy lifestyle in the process of realization of intersubject links on the example of studying of a school course of physics is noted. It is shown that in explaining to students the physical laws of nature, phenomena and processes the most appropriate is the use of specific examples, including the area of valeology, which not only broaden pupils’ outlook, but also affect the development of their culture of health. The article focuses on pedagogical techniques, allowing the teacher to develop individual abilities of students and create an atmosphere of success for each student both in the classroom and in extracurricular time in self-preparation for classes. Different forms of work are described that students can fulfill implementing interdisciplinary links between valeology and physics: self-dependent development of physics tasks using valeology material, writing essays, making presentations, preparing reports, making visual teaching aids, etc. It is concluded that this work allows the learner not only to accumulate knowledge about health care, but also to apply them in practice

Achievement of maximal SARS-CoV-2 collective immunity among the Tajik population by March 2022

Despite all efforts of the world community, the COVID-19 pandemic remains one of the main epidemiological challenges of our time. Even with its widespread distribution, the infection may have certain local features due to social, geographic, and climatic factors. Objective: to study collective immunity to SARS-CoV-2 in the population of the Republic of Tajikistan.A cross-sectional, randomized study of herd immunity was carried out according to a program developed by Rospotrebnadzor and the St. Petersburg Pasteur Institute, taking into account WHO recommendations. The ethics committees of the corresponding entities approved the study: Tajik Ministry of Health and Social Protection; and the St. Petersburg Pasteur Institute (Russia). Based on questionnaire results, 4,022 people were selected, representing 0.15% (95% CI: 0.14-0.15) of the total population randomized by age and region. In subsequent laboratory analysis, 3682 people took part. The distribution and quantitative content of antibodies (Abs) to viral nucleocapsid (N Ag) and receptor binding domain (RBD Ag) were determined by ELISA. When questioned, a history of SARS-CoV-2 vaccination was indicated by 69.7% (95% CI: 68.2-71.2) of the volunteer cohort. Vector vaccines were most frequently used (50.6%; 95% CI: 48.7-52.5), with whole-virion inactivated preparations in second place (23.0%: 95% CI: 21.4-26.6) and mRNA vaccines in third place (21.0%; 95% CI:19.4-22.6).The cohort (n = 3682) featured 27.5% men and 72.5% women. The overall seroprevalence was 98.5% (95% CI: 97.7-99.2) in men and 99.4% (95% CI: 99.0-99.6) in women (differences statistically insignificant). Overall seroprevalence in the cohort was 99.2% (95% CI: 98.8-99.4) and ranged from 97.2 to 100% in certain subgroups. Asymptomatic seropositivity in the whole cohort was 98.4% (95% CI: 97.6-99.1). As a result of a mandatory vaccination program introduced in Tajikistan under a COVID-19 Emergency Project, the level of herd immunity among vaccinated individuals reached 99.5% (95% CI: 99.1-99.7), which is similar to the level reached in the cohort as a whole.The epidemic situation that developed in Tajikistan by mid-March 2022 was characterized by an almost absolute level of herd immunity, as evidenced by an absence of detected overt COVID-19 cases since the end of February (2022)

A MSFD complementary approach for the assessment of pressures, knowledge and data gaps in Southern European Seas : the PERSEUS experience

PERSEUS project aims to identify the most relevant pressures exerted on the ecosystems of the Southern European Seas (SES), highlighting knowledge and data gaps that endanger the achievement of SES Good Environmental Status (GES) as mandated by the Marine Strategy Framework Directive (MSFD). A complementary approach has been adopted, by a meta-analysis of existing literature on pressure/impact/knowledge gaps summarized in tables related to the MSFD descriptors, discriminating open waters from coastal areas. A comparative assessment of the Initial Assessments (IAs) for five SES countries has been also independently performed. The comparison between meta-analysis results and IAs shows similarities for coastal areas only. Major knowledge gaps have been detected for the biodiversity, marine food web, marine litter and underwater noise descriptors. The meta-analysis also allowed the identification of additional research themes targeting research topics that are requested to the achievement of GES. 2015 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license.peer-reviewe

Modern Diagnostic Studies in Rhinology: Necessary and Sufficient

The article provides the overview of the most modern diagnostics methods for diseases of the nasal cavity, paranasal sinuses and nasopharynx. The advisability of additional examinations for various pathologies has been provided. Methods of laboratory diagnostics and methods of material sampling for microbiological verification of pathogens are discussed. Methods of functional diagnostics of nasal breathing disorders are described

Assessment of a bioproductivity of fresh reservoirs of Berdyuzhsky and Kazan areas on the basis of hydrological and ecological characteristics

Представлены результаты обследования 24 озер Бердюжского и Казанского районов Тюменской области. Проанализировано рыбохозяйственное значение озер. Даны рекомендации по дальнейшей эксплуатации водоемов в современных условиях.Results of inspection of 24 lakes of Berdjuzhsky and Kazansky regions of the Tyumen region are presented. It is analysed fish farming value of lakes. Recommendations about the further operation of reservoirs in modern conditions are made