Genetic Diversity in Local Taraxacum officinale L. Populations from Habitats Varied in Toxic Load

The level of lipid peroxidation (a stress indicator) and the quantitative traits of leaf tissue (the number and size of mesophyll cells and chloroplasts) were determined in Taraxacum officinale L. plants from five habitats near the city of Nizhniy Tagil that differ in terms of the heavy metal content in the soil. It is shown that in pollutedhabitats, the content of heavy metals (Cu2+ and Zn2+) in leaves is significantly higher compared to plants from background areas, with leaf thickness, mesophyll cell volume and chloroplast number per cell increasing. Both Inter Simple Sequence Repeat (ISSR) analysis and cluster analysis of dandelion genetic diversity based oneight primers have revealed that four groups of plants are closely related genetically. Of the observed differences between five local populations, 78% are caused by intrapopulation variability and 22% by interpopulation variability. It is supposed that Taraxacum officinale’s tolerance to heavy metal contamination in the studied localities is not genetically fixed adaptation, but acclimation within genetically selected rangesof tolerance. Keywords: heavy metals, local populations, ISSR markers, leaf trait

THE USE OF DIFFERENT INFORMATION SOURCES BY HEARING IMPAIRED STUDENTS FOR EDUCATIONAL PURPOSES (COMPARED TO STUDENTS WITH HEALTH STANDARD)

В статье приведены результаты анкетирования студентов с нарушениями слуха по вопросу использования ими различных источников информации в образовательных целях. Результаты анкетирования приводятся в сравнении результатами анкетирования студентов с нормой здоровья, анализируются причины полученных расхождений в результатахThe paper presents the results of questionnaire survey on the use of different information sources for educational purposes. The paper compares the results for the students with and without hearing impairment and analyses the reasons for the differences reveale

Creating Video Lectures for Descriptive Geometry Online Course for Hearing Impaired Students

Статья посвящена вопросам использования дистанционных образовательных технологий в Ижевском государственном техническом университет имени М.Т. Калашникова для студентов с нарушением слуха. Разработан и внедрен в учебный процесс дистанционный курс по начертательной геометрии для слабослышащих студентов. Представлена структура курса, ресурсы и элементы. Описана подготовка материалов по созданию и записи видеолекций для студентов с нарушением слуха.The paper describes the use of e-learning for hearing impaired students at M.T. Kalashnikov Izhevsk State Technical University. An online course in descriptive geometry for hearing impaired students has been developed and introduced into the educational process. The paper presents the course structure, resources and elements. It also describes the key moments in preparation of materials when recording video lectures for students with hearing impairments

THE USE OF E-LEARNING FOR HEARING IMPAIRED STUDENTS

Статья посвящена вопросам использования дистанционных образовательных технологий в Ижевском государственном техническом университет имени М.Т. Калашникова для студентов с нарушением слуха. Представлена структура дистанционного курса, ресурсы и элементыThe paper describes the use of e-learning for hearing impaired students at M.T. Kalashnikov Izhevsk State Technical University. It presents the structure of the e-course on Descriptive Geometry, as well as its elements and resource

Dynamics of Alpha Diversity During the Restoration Succession of Grass Communities of Fallow Lands and Pits

The features of the restoration of the diversity of plant communities formed under different edaphic conditions were studied. In the period of 2006-2020, restorative successions on the territory of the Tagil zone of the Middle Urals were observed on nine sites, five of which were fallow lands, and four were overgrown anthropogenic pits. In the course of direct observations of the communities of fallow lands and pits, four groups of phytocenoses were identified, reflecting successive stages of succession: gramineous phytocenoses with maintaining their status during the study period; gramineous phytocenoses with subsequent transition to the meadow stage; and early meadow and formed meadow phytocenoses. The temporal dynamics of their species composition and alpha diversity was studied. Differences in indicators of diversity of communities associated with their successional age and physicochemical parameters of soils (agrozems and technozems) were established. Communities of agrozems and technozems differed in the rate of change in alpha diversity indicators. The increase in these indicators occurred significantly faster on agrozems than on technozems. The transition between stages was not accompanied by a significant increase in the diversity of communities on technozems.The study was carried out within the framework of the state assignment of the Nizhny Tagil State Social and Pedagogical Institute of the Russian State Vocational Pedagogical University and the Institute of Plant and Animal Ecology of the Ural Branch of the Russian Academy of Sciences