Development of University Students’ Motivation with the Help of E-learning

The relevance of the study is due to the orientation of the modern model of education to the formation of a competitive creative personality with the need of continual self-improvement and self-development. It is possible due to the high level of the learning motivation of students and the motivation to acquire a future profession. It should be emphasized that e-learning has a considerable potential in this aspect. In this regard, this article is aimed to reveal the specifics of the use of e-learning means in the development of university students motivation. The article presents a series of lessons designed to develop students’ motivation, implemented by e-learning means. We elaborated a series of webinars (“I want to be an engineer – I want to be taught!”; "Information crystals" (effective information processing techniques), "Time Management Secrets," "Kaleidoscope of discoveries", "Jolly mathematics"); chats ("The engineer of the third millennium - the future engineer, who is he?", "Physics, Chemistry for Engineers: Myth and Reality"); the virtual round table - "The heritage of the past" (about great scientists, inventions and discoveries) and others. The article presents the ways of applying e-learning in the development of university students’ motivation. On one hand, it is the methodological basis of the training system; on the other hand, it provides the usage of scientific knowledge in the study of professional disciplines

Heart failure and diabetes mellitus: insight into comorbidity

Diabetes mellitus (DM) and heart failure (HF) are frequent comorbidities with a bidirectional relationship. Patients with HF have increased risk of developing DM, and those with DM are at greater risk of developing HF. HF does not fit clearly into the microangiopathy and macroangiopathy groups. It is known that coronary artery disease and arterial hypertension are the major causes of HF; however, it has been shown that DM can trigger functional and structural abnormalities in the myocardium via diabetic cardiomyopathy, a condition with either restrictive or dilated phenotype. While HF treatment is equally effective and safe in patients with and without DM, this statement is not applicable for antidiabetic treatment. Several antidiabetic drugs, such as rosiglitazone, pioglitazone and saxagliptin increase the risk of hospitalisation for HF, therefore these antidiabetic drugs are contraindicated in patients with DM and HF or patients at risk of developing HF. Despite a large number of clinical evidence, uncertainty about the safety of antidiabetic drugs in patients with HF always exists. In this review, the issues of DM treatment in patients with HF are addressed in detail

Methods of yeast genome editing

Yeasts are a convenient model eukaryote used for genome studies and genome editing. Saccharomyces cerevisiae is the species most widely employed in biotechnology, since it is easily cultivated in bioreactors and is absolutely safe. The last decade saw a significant development of methods of yeast genetic engineering and the creation of novel instruments adapted from other fields, which allowed one to significantly accelerate the construction of new strains. The most prominent examples are the proteins used for directed DNA editing. For a long time, yeast genome engineering was based on the yeasts’ system of homologous recombination. It was sufficient for several decades before the development of high­throughput methods. Many high­throughput methods were developed in the second decade of the XXI century, including those used in genomics, transcriptomics, proteomics, metabolomics, interactomics, etc. Modern bioinformatic databases now allow one to rapidly process the increasing flow of information and model cellular processes. As a result, the rate of analysis and prediction of targets for genome editing is currently higher than the rate of genome editing, which led to the development of new methods of genetic engineering. This process was particularly pronounced for microorganisms. Modern tasks require tens, hundreds, sometimes even thousands of genome modifications, which made researchers to look for new techniques. As a result, the instruments used for more complex objects, such as animals, plants, and cell lines, were adapted for yeasts. Modern methods for yeast genome editing allow introducing several modifications into the genome in a single step. In this study, we review the methods of directed genome editing and their applications and perspectives for yeasts

The Development of Model and Measuring Tool for Specialists Accreditation in Area of Public Health Services

The main purpose of the paper is to present some theoretical approaches and some methods providing assessment optimization in specialists' accreditation in area of public health services. The results of research presented in this paper, include the model of multistage adaptive measurements and two methods for reliability and validity analysis, providing high justice decisions in accreditation and corresponding to requirements in High-Stakes Testing procedures. The assessment optimization intends for minimization time of assessment and for reliability and validity data increasing. For optimization the special model of measurements based on multistage adaptive testing is offered. The using of offered model in assessment design allows to realize the advantages of traditional adaptive testing and linear testing, while minimizing their disadvantages. So, this model is recommended as dominating for assessment in accreditation

СОВРЕМЕННЫЙ КОМПЛЕКСНЫЙ ПОДХОД К ХИРУРГИЧЕСКОМУ ЛЕЧЕНИЮ ЛЕГОЧНОЙ АРТЕРИАЛЬНОЙ ГИПЕРТЕНЗИИ, АССОЦИИРОВАННОЙ С ВРОЖДЕННЫМИ ПОРОКАМИ СЕРДЦА

Pulmonary arterial hypertension (PAH) is a common complication of congenital heart disease (CHD) occurring in left-to-right shunt. The progression of PAH is associated with delayed diagnosis and surgical treatment of congenital heart disease. An uncorrected left-to-right shunt in patients with CHD lead to histological changes of pulmonary vessels and reversal of the shunt may arise, with the development of Eisenmenger’s syndrome. Until recently, the surgical treatment of patients thought to be impossible, and few attempts to perform radical correction were associated with high in-hospital mortality. The main causes of the in-hospital mortality included acute right ventricular failure, pulmonary hypertension crisis and cardiac arrhythmias. The long-term survival of these patients was low, directly associated with the progression of residual pulmonary hypertension. The novel technique of a fenestrated double patch has been widely used abroad, but very rarely in Russia. Moreover, there is no standardized algorithm for selecting surgical approach in these patients as well as common approaches to the preoperative management and anesthetic protocol. The efficiency of specific therapies for residual pulmonary hypertension is poorly understood. Lack of research and experience in applying the fenestrated double patch in Russia for a population of children and adolescents who require combined treatment (surgical and specific therapy for pulmonary arterial hypertension) proved our research to be pivotal.Легочная артериальная гипертензия (ЛАГ) является частым осложнением врожденных пороков сердца (ВПС) с лево-правым сбросом. Развитие этого осложнения связано с несвоевременной диагностикой и хирургической коррекцией врожденной патологии сердца. Длительное существование врожденного порока сердца с лево-правым шунтом приводит к стадийному гистологическому изменению сосудов легких и формированию комплекса Эйзенменгера, появлению «перекрестного» сброса крови. До недавнего времени хирургическое лечение таких пациентов считалось невозможным, а немногочисленные попытки радикальной коррекции сопровождались высокой госпитальной летальностью. Основными причинами госпитальной летальности являлись: острая правожелудочковая недостаточность, кризы легочной гипертензии и нарушения ритма сердца. Отдаленная выживаемость таких пациентов была невысокой и обусловливалась прогрессированием резидуальной легочной гипертензии. Оригинальная методика двойной заплаты с фенестрой применялась за рубежом, но не нашла широкого распространения в России. Кроме того, до сих пор не существует стандартизированного алгоритма выбора хирургической тактики у таких пациентов, отсутствуют единые подходы к предоперационной подготовке, не разработан общепринятый протокол анестезиологического пособия, до конца не изучена эффективность специфической терапии резидуальной легочной гипертензии. Отсутствие публикаций и опыта применения методики двойной заплаты с фенестрой в России при наличии популяции детей и подростков, нуждающихся в комбинированном, хирургическом и специфическом лечении легочной артериальной гипертензии, постулировало наше исследование

Характеризация наночастиц кристаллического кремния, легированного железом, и их модификация цитрат-анионами для использования in vivo

Objectives. This paper presents data on the development and study of the structural properties of iron-doped crystalline silicon (nc-Si/SiOx/Fe) nanoparticles obtained using the plasma-chemical method for application in magnetic resonance imaging diagnostics and treatment of oncological diseases. This work aimed to use a variety of analytical methods to study the structural properties of nc-Si/SiOx/Fe and their colloidal stabilization with citrate anions for in vivo applications.Methods. Silicon nanoparticles obtained via the plasma-chemical synthesis method were characterized by laser spark emission spectroscopy, atomic emission spectroscopy, Fouriertransform infrared spectroscopy, and X-ray photoelectron spectroscopy. The hydrodynamic diameter of the nanoparticles was estimated using dynamic light scattering. The toxicity of the nanoparticles was investigated using a colorimetric MTT test for the cell metabolic activity. Elemental iron with different Fe/Si atomic ratios was added to the feedstock during loading.Results. The particles were shown to have a large silicon core covered by a relatively thin layer of intermediate oxides (interface) and an amorphous oxide shell, which is silicon oxide with different oxidation states SiOx (0 ≤ x ≤ 2). The samples had an iron content of 0.8–1.8 at %. Colloidal solutions of the nanoparticles stabilized by citrate anions were obtained and characterized. According to the analysis of the cytotoxicity of the modified nanosilicon particles using monoclonal K562 human erythroleukemia cells, no toxicity was found for cells in culture at particle concentrations of up to 5 µg/mL.Conclusions. Since the obtained modified particles are nontoxic, they can be used in in vivo theranostic applications.Цели. В работе приводятся данные по разработке и изучению структурных свойств полученных плазмохимическим методом наночастиц кремния nc-Si/SiOx/Fe, легированных железом. Цель работы – исследование свойств наночастиц кремния, легированных железом, комплексом аналитических методов и их стабилизация цитрат-анионами для применения в диагностике методом магнитно-резонансной томографии и лечении онкологических заболеваний.Методы. Наночастицы кремния, полученные плазмохимическим методом синтеза, были охарактеризованы лазерно-искровым эмиссионным методом, методом атомной эмиссионной спектроскопии, Фурье-ИК-спектроскопией, рентгеновской фотоэлектронной спектроскопией. Гидродинамический диаметр наночастиц оценивали методом динамического светорассеяния. Исследование токсичности наночастиц проводили с помощью колориметрического МТТ теста на метаболическую активность клеток. В исходное сырье при загрузке добавляли элементарное железо с разным атомным соотношением Fe/Si.Результаты. Было показано, что частица имеет кремниевое ядро с аморфной оксидной оболочкой, представляющей собой оксиды кремния с разной степенью окисления SiO x (0 ≤ x ≤ 2). Содержание железа в образцах составило от 0.8 до 1.8 ат. %. Были получены и охарактеризованы коллоидные растворы наночастиц, стабилизированные цитрат-анионами. Анализ цитотоксичности модифицированных частиц нанокремния с использованием моноклонизированных клеток эритролейкоза человека К562 показал отсутствие токсичности для клеток в культуре при концентрации частиц до 5 мкг/мл.Выводы. Полученные модифицированные частицы не обладают токсичностью, поэтому их можно рекомендовать для использования в in vivo приложениях для тераностик