Acquisition, storage and dissemination of socially dangerous information : theoretical and methodological issues of the legal prohibition

The research project is focused on the Russian and foreign practice of the legal prohibition of acquisition, storage and dissemination of socially dangerous information on the Internet. Other objects of studies include legal restrictions on freedom of the media in order to protect the constitutional order, the interests of the citizens and the security of the state.peer-reviewe

Design of the Model of Ratiometric Polymer Nanobiothermometer Based on Quantum Dots

To solve many modern biological and biotechnological tasks it is necessary to realize strictly control and regulation of temperature of the cells and their organelles. Thi stasks include control of various exo- and endothermic reactions, monitoring of tissues‘ and individual cell‘s temperature in in vitro researches and in vivo procedures such as the hyperthermia procedure that used for cancer treatment. The today known methods of measuring and controlling of temperature at the cellular level can not provide the necessary level of locality and accuracy due to too big size and heightened sensitivity to external factors. The real alternative of existing today methods is nanoscale temperature biosensor operating on a ratiometric principle and based on the composite structure from polymers and colloidal quantum dots. In this paper we present a working model and plan of investigation of ratiometric nanoscale polymer nanobiothermometer based on quantum dots. Keywords: thermosensors, quantum dots, local temperature, polymers, temperature measuremen

Variability of Properties Characterizing Persistent Potential of Cholera Vibrio in Biofilm Communities

Represented are the results of studies on variability of properties characterizing persistent potential of V. cholerae in biofilm communities under the long-term cultivation in river water. Demonstrated is the fact that in the cold water epidemically significant cholera vibrios form thin biofilms and do not survive for the most part. But atoxigenic strains, isolated from the water, can survive in the environment both in the cold and warm time of the year due to formation of thick biofilm and realization of the persistent activity. Expressiveness of the properties studied, except antilysozyme activity (ALA), directly correlate with biofilm formation intensity. In case of ALA one observes inverse correlation

Experimental Research Into Generation of Acoustic Emission Signals in the Process of Friction of Hadfield Steel Single Crystals

The results of experimental research into dry sliding friction of Hadfield steel single crystals involving registration of acoustic emission are presented in the paper. The images of friction surfaces of Hadfield steel single crystals and wear grooves of the counterbody surface made after completion of three serial experiments conducted under similar conditions and friction regimes are given. The relation of the acoustic emission waveform envelope to the changing friction factor is revealed. Amplitude-frequency characteristics of acoustic emission signal frames are determined on the base of Fast Fourier Transform and Short Time Fourier Transform during the run-in stage of tribounits and in the process of stable friction

The Role of Cadaverine in Cholera Vibrio Adaptation to Stress Conditions, Induced by Hypoxia

Objective of the study is to evaluate the role of cadaverine in cholera vibrio adaptation to stress, induced by hypoxia. Materials and methods. Utilized have been 18 V. cholerae strains with different set of pathogenicity determinants. The strains are isolated from patients and from river-water. Results and conclusions. It is demonstrated that under experimental modeling of intestinal tract gas medium, cholera vibrios respond to unfavorable conditions of the environment by producing cadaverine. Its amount coincides with pathogenicity of cultures (it is higher in epidemically significant strains, than in the strains that lack genes of toxin and pilus production). It is established that the level of extracellular cadaverine production is greater than that of intracellular; but correlation of the parameters depends upon the oxygen and carbon dioxide concentration in the environment. Intracellular cadaverine is mainly generated at a high oxygen concentration (10-12 %); while under extreme hypoxia

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

Особенности применения ралтегравира у ВИЧ-инфицированных пациентов с различной соматической патологией

Purpose of the study. Evaluation of the efficacy, safety and tolerability of raltegravir regimens in HIV-infected patients with concomitant pathology in real clinical practice.Materials and methods. A retrospective analysis was carried out of 277 outpatient records of HIV-infected patients who received raltegravir (RAL) as a third component both in patients without previous experience of antiretroviral therapy (ART) and in patients with experience of treatment with various somatic pathologies. The main criterion for the effectiveness of the scheme was the proportion of patients with undetectable viral load at the start of the analysis. Additional criteria for evaluating the efficacy and safety of the regimen were the dynamics of the number of CD4-lymphocytes, the frequency and nature of undesirable side reactions.Results. On average, patients with no experience of treatment and with experience of treatment received regimens with raltegravir for about 5 years. At the time of the study in 2020, 69.8% of patients on ART for the first time continued to take a regimen containing raltegravir. In this group, the proportion of patients with virological suppression (PCR of HIV RNA less than 50 kopecks / ml) was 97.7%. 75.2% of patients in the second group in 2020 continued to take the RAL regimen. The proportion of patients with virological suppression (VL less than 50 kopecks / ml) in this group was 97.5%. During the treatment, there was no discontinuation of the regimen in both groups due to undesirable side reactions to raltegravir.Conclusion. The results of this study confirm that RAL-based regimens provide a high level of efficacy with a good tolerance and safety profile in routine clinical practice for both naive and experienced patients with various somatic pathologies.Цель: оценка эффективности, безопасности и переносимости схем, содержащих ралтегравир, у ВИЧ-инфицированных пациентов с различной сопутствующей патологией в реальной клинической практике.Материалы и методы. Проведен ретроспективный анализ 277 амбулаторных карт ВИЧ-инфицированных пациентов, получавших в качестве третьего компонента препарат ралтегравир (RAL) как у пациентов без предшествующего опыта антиретровирусной терапии (АРТ), так и у пациентов с опытом лечения с различной соматической патологией. Основным критерием эффективности схемы явилась доля пациентов с неопределяемым уровнем вирусной нагрузки на момент начала анализа. Дополнительными критериями оценки эффективности и безопасности схемы являлась динамика количества CD4-лимфоцитов, частота и характер нежелательных побочных реакций.Результаты. В среднем пациенты без опыта лечения и с опытом лечения получали схемы с ралтегравиром около 5 лет. На момент проведения исследования в 2020 г. 69,8% пациентов, которым АРТ была назначена впервые, продолжали принимать схему, содержащую ралтегра-вир. В данной группе доля пациентов с вирусологической супрессией (ПЦР РНК ВИЧ менее 50 коп/мл) составила 97,7%. 75,2% пациентов второй группы в 2020 г. продолжали принимать схему с RAL. Доля пациентов с вирусологической супрессией (ВН менее 50 коп/мл) в этой группе составила 97,5%. За время лечения в обеих группах не было отмены схемы в связи с нежелательными побочными реакциями на ралтегравир.Заключение. Результаты этого исследования подтверждают, что схемы на основе RAL обеспечивают высокий уровень эффективности с хорошим профилем переносимости и безопасности в рутинной клинической практике как у «наивных» пациентов, так и пациентов с опытом лечения различной соматической патологии