The social reproduction: basic theory and models

В статті узагальнено основні підходи до вивчення як окремих фаз суспільного відтворення — виробництва, розподілу, обміну та споживання, так і процесу суспільного відтворення в цілому. Проаналізовано класичні теорії, окреслено перспективи використання їх інструментарію в сучасних умовах; визначено основні тренди дослідження суспільного відтворення крізь призму новітніх теорій.The article summarizes the main approaches to the study of individual phases of social reproduction —production, distribution, exchanges and consumption, and the process of social reproduction as a whole. The paper analyzes the classical theory, outlines prospects for the use of their tools in modern conditions; identifies the main trends in the study of social reproduction through the prism of the latest theories

Functional activities of DNA-guided and RNA-guided bacterial Argonaute proteins

Specific targeting of nucleic acids by Argonaute (Ago) proteins lies at the heart of RNA interference. Eukaryotic Ago’s bind small RNAs and use them as guides for target RNA recognition and cleavage. Argonaute proteins are also found in bacterial and archaeal genomes where their roles remain unclear. Structural and biochemical studies of a few prokaryotic Ago proteins showed that they can function as endonucleases in vitro and may provide cell defense against foreign genetic elements in vivo. However, most prokaryotic Ago’s are predicted to lack endonuclease activity; they also often have unusual domain architectures and are associated in the same operons with putative nucleases or helicases. In this study, we focused on prokaryotic Ago’s from several cultivable bacterial species. We showed that although eukaryotic Ago’s work only with RNA, prokaryotic proteins included in our analysis can use either RNA or DNA guides to recognize DNA targets. To define the specificity of bacterial Ago’s we expressed them in Escherichia coli and analyzed associated short nucleic acids. Furthermore, we tested nucleolytic activity of three proteins in vitro using different guide and target molecules, and also measured the affinity of Ago’s to guides and targets. The slicer activity of Ago’s is known to depend on four conserved amino acid residues in the catalytic center. We showed that, in agreement with bioinformatic predictions, two of the three proteins possess the endonuclease activity. Our results indicate that bacterial Ago proteins can cleave target nucleic acids with high specificity in vitro and can function in the heterologous E. coli system in vivo. These properties likely underlie the process of DNA/RNA interference in bacterial cells and may promote horizontal transfer of the Ago genes

Development of personal competencies of a cardiologist

The article considers federal educational and professional standards for doctors’ training from a practical point of view. In contrast to algorithms, clinical guidelines and protocols for healthcare delivery, competence in the field of informing and communicating with a patient and legal representatives requires the humanitarian skills, that is, a fundamentally different methodological point of view. The ways to develop such skills in a general practitioner or a cardiologist during education are not clear. In many countries, research is being conducted on the need for doctors to master not just patient-centered skills, but specific communication skills for cardiology practice. Certain favorable results are evident, but such work is complicated by a completely different epistemological category of this kind of skills than the generally accepted biomedical one, which is usually called clinical

Formation of zonal agro-eco clusters as a mechanism for the development of rural areas

Today, the degree of agricultural development, and, in the future, the level of national food security, the public health and the quality of life, are largely ensured by innovative developments in the field of alternative agriculture, the preservation of natural resources and, above all, the main production facility – land. At the same time, the unfilled market capacity of organic products and the significant land potential for the development of organic farming create all the necessary prerequisites for enhancing the competitiveness of Russian rural producers. The development of agricultural entrepreneurship towards the greening of land use, organic production and development of the domestic market for organic (ecological) products in the format of zonal agro-eco clusters is one of the strategic directions for implementing reforms in the agricultural sector. The paper presents the directions of the formation and development of zonal agro-eco clusters for the production, processing and sale of organic products in the agricultural regions of Russia.peer-reviewe

Catalytically active Argonaute nuclease from Synechococcus elongatus

Argonaute proteins, which are found in almost all eukaryotes and in many prokaryotes, use small nucleic acid guides for the recognition and cleavage of complementary nucleic acids. While the role of eukaryotic Argonautes in RNA interference is well understood, the functions of prokaryotic Argonautes remain largely unknown. It was proposed that they may provide defense against invading nucleic acids, preferably acting on DNA targets. In this work, we studied the SynAgo protein from the cyanobacterium Synechococcus elongatus. We expressed affinity-tagged SynAgo in S. elongatus, purified the protein, and sequenced and mapped associated nucleic acids. We showed that SynAgo is bound with ~18 nt small DNAs coming from all genomic regions with no obvious gene specificity. Mass-spectrometry of copurified proteins from S. elongatus also revealed several possible protein partners of SynAgo. Biochemical analysis demonstrated that SynAgo is an active nuclease that can cleave both target DNA and RNA with varying efficiency, depending on the reaction conditions and the presence of mismatches between the guide and target strands. Finally, we introduced the SynAgo gene in the E. coli genome and tested its effects on plasmid maintenance and phage infections

Catalytically active Argonaute nuclease from Synechococcus elongatus

Argonaute proteins, which are found in almost all eukaryotes and in many prokaryotes, use small nucleic acid guides for the recognition and cleavage of complementary nucleic acids. While the role of eukaryotic Argonautes in RNA interference is well understood, the functions of prokaryotic Argonautes remain largely unknown. It was proposed that they may provide defense against invading nucleic acids, preferably acting on DNA targets. In this work, we studied the SynAgo protein from the cyanobacterium Synechococcus elongatus. We expressed affinity-tagged SynAgo in S. elongatus, purified the protein, and sequenced and mapped associated nucleic acids. We showed that SynAgo is bound with ~18 nt small DNAs coming from all genomic regions with no obvious gene specificity. Mass-spectrometry of copurified proteins from S. elongatus also revealed several possible protein partners of SynAgo. Biochemical analysis demonstrated that SynAgo is an active nuclease that can cleave both target DNA and RNA with varying efficiency, depending on the reaction conditions and the presence of mismatches between the guide and target strands. Finally, we introduced the SynAgo gene in the E. coli genome and tested its effects on plasmid maintenance and phage infections

Plasmon effect on triplet-singlet energy transfer in the dye-doped Langmuir-Blodgett films

The effect of silver plasmonic nanoparticles on triplet-singlet energy transfer in the donor-acceptor pair of organic dyes was studied. Layered dye films were prepared on the surface of glass and island silver films using the Langmuir-Blodgett method. Amphiphilic analogs of Rose bengal and polymethine dye were used as donor and acceptor of energy. A polymer monolayer was deposited between monolayers of donor and acceptor molecules to exclude the competing triplet-triplet energy transfer. The spectra of delayed fluorescence and phosphorescence of donor-acceptor films and the delayed luminescence lifetime of donor in these films have been measured. It is shown that a threefold increase in the fluorescence intensity and a twofold increase in the donor phosphorescence intensity are observed on silver island films. The successful triplet-singlet energy transfer is evidenced by both the quenching of donor centers and appearance of sensitized delayed fluorescence of the acceptor with the duration close to the donor triplet lifetime. In the presence of silver nanoparticles, in addition to enhancement in the intensity of the donor emission, an increase in the efficiency of tripletsinglet energy transfer was observed. The obtained results can be used in various optical devices

The components of clinical interaction ethics

Ethical norms are traditionally inseparable from medical work as such and are an unconditional part of the general idea of medicine and doctorhood. However, the structure of medical ethics is ambiguous and complex. It includes the ways in which ethically loaded decisions are made, the categories of ethically loaded decisions themselves and the good/bad dichotomy, as well as cultural context that defines these categories. The psychological component also plays a role: mental state of a patient, a doctor, as well as verbal and nonverbal communication. Finally, the legal framework is imperatively introduced into the doctor-patient relationship, setting norms regardless of the nuances of interpersonal interaction. This article discusses the most important and explicit components of an ethical relationship in helping, and also proposes as a universal solution the ethics of virtue neither as an instrumental, but an essential approach

Evaluation of anemia syndrom in haemophilia

In work risk factors of development of an anemia at patients with a hemophilia are analyzed. The anemia met more often at the heavy form of disease, at persons with A (II) group of blood (40%)