Manifestation of the effects of dynamic diffraction in the coherent X-ray radiation of relativistic electrons in a periodic layered medium

The possibility of manifestation of the effects of dynamic diffraction in the coherent X-ray radiation of relativistic electrons in a periodic layered medium is studied theoretically in this pape

Coherent X-rays excited by a relativistic electron crossing a periodic stratified structure in Bragg scattering geometry

The dynamic theory of coherent X-rays excited by a relativistic electron crossing an artificial periodic stratified structure in Bragg scattering geometryhas been developed for the general case of asymmetric reflection. Expressions describing the spectral-angularcharacteristics of radiation have been derived and investigatedyesБелгородский госуниверсите

Improving educational process quality in the lessons of natural and mathematical cycle by means of stem-training

Today, the educational process is focused on the development of personal characteristics that meet the requirements of a modern educated person. In this regard, the task of educational institutions is to adopt the educational process to today’s realities. To achieve this goal, STEM education is implemente

Peculiarities of manifestation of peak special strength in beginner armwrestlers of various weight categories

The comparison of the test rates of armwrestlers of the middle and heavy weight categories showed that the greatest difference between the mean strength values, above 100%, was found in the forearm pronators, above 90% - in the forearm supinators (p<0.01), above 38% - in the shoulder extensors (p<0.01); the smallest - in the finger flexors (5.1%), supine forearm flexors (16.6%), and hand flexors (17.6%). The findings indicate that the difference in the special strength fitness rates in beginner armwrestlers of various weight categories is less significant than that of qualified athlete

Testing of preformed particles polymer gel technology on core filtration models to limit water inflows

In order to reduce watering of wells and equalize their injectivity profiles, the prospects of introducing PPG technology in Russian fields are considered, in which preformed particles polymer gel are pumped into the injection well. These particles, being a supersorbent based on polyacrylamide, absorb water, become elastic, which allows them to shrink and tear in narrow filtration channels. When the polymer is filtered along permeable layers saturated with water, polymer particles accumulate in waterlogged intervals and thus they form a polymer plug, which redistributes the filtration flows and increases the coverage of the formation by the process of oil displacement. More than 4000 downhole operations have been carried out in the fields of China and the USA using PPG technology by now. In domestic fields in Western Siberia, there is limited experience in applying a similar technology in high-temperature formations with low mineralization of formation water. Due to the absence of hydrolytic processes in polyacrylamide, well-known domestic compositions are not applicable due to the low absorption capacity in the conditions of low-temperature deposits with increased mineralization of formation water. The authors synthesized a polymer based on polyacrylamide by block polymerization, which allows to obtain a high absorption capacity, including for low-temperature formations with high mineralization of formation water, which is typical for Perm Territory fields. Filtration experiments were carried out on core models with the composition developed by the authors, this composition focused on low formation temperatures and high mineralization of formation water. As a result of the experiments, it was found that the swollen particles of the gel are able to pass into fractures with a diameter less than their own size at least 20 times. With a significant increase in the viscosity of the dispersion medium, the stability of the suspension increases. Particles of polymer gel have the necessary strength for injection in the field conditions. The fracture permeability during polymer injection decreases by several times and becomes comparable with the permeability of pore collectors

Неоптерин как современный маркер воспаления

Acute respiratory viral infections are one of the topical problems of pediatrics, due to the high level of morbidity in the pediatric population, a significant incidence of severe and complicated variants of the disease, especially among young children. It is known that respiratory viral infections under the influence of a pathogen is a dysfunction of interferonogenesis. Analyzed the results of scientific investigations devoted to the determination of neopterin concentration in relation to diseases associated with activation mediated by interferon- immune response. The increase in its concentration correlates with the changes of INF-, INF- and is associated with a systemic inflammatory response. Monitoring of the level of neopterin may be useful as a potential marker of the state of antiviral protection in children. Острые респираторные вирусные инфекции являются одной из актуальных проблем педиатрии, что обусловлено высоким уровнем заболеваемости в детской популяции, значительной частотой развития тяжелых и осложненных вариантов течения болезней, особенно среди детей раннего возраста. Известно, что при респираторных вирусных инфекциях под воздействием патогена происходит нарушение интерфеногенеза. Проанализированы результаты научных исследований, посвященных определению концентрации неоптерина во взаимосвязи с заболеваниями, сопровождающихся активацией опосредованного интерфероном- имунного ответа. Увеличение его концентрации коррелирует с изменениями ИНФ-, ИНФ- и связано с системным воспалительным ответом. Мониторирование уровня неоптерина может быть полезным в качестве возможного маркера состояния противовирусной защиты у детей

The relationships of cognitive and non-cognitive factors and personal anxiety at students

The purposeof the studyis to assess the impact of lifestyle factors and the educational process on the level of anxiety in third–year students of the medical faculty of the Medical University.Цель исследования – оценить воздействие факторов образа жизни и образовательного процесса на уровень тревожности у студентов третьего курса лечебного факультета медицинского университета