List of publications on a keyword: «organism»

The system organization of the human body involves a comprehensive, interdisciplinary consideration of the principles of its functioning. This universal model should be imputed as the basis for teaching biological and medical disciplines in the course of acquiring cognitive skills. The article provides an example of designing a technological map of practical classes in the discipline «Histology, Embryology, Cytology» for more successful mastering of the topic by students, development of their systemic knowledge, which is based on interdisciplinary connections.

The article analyzes and summarizes the principles of architectural bionics applied to various construction and technical structures. The analysis was carried out in the course of studying the scientific literature on the topic “Bionics. Architectural structures». The purpose of this work is to study the principles of architectural bionics, to study the possibility and effectiveness of their application for solving engineering and technical problems. The main task of the work was to study the directions and principles of development of architectural bionics, to assess the effectiveness of their application for solving technical problems, to find the correspondence of biological systems to construction and technical structures and facilities, to analyze known architectural structures from the point of view of architectural bionics.

The subject of the study is a strain of Bacillus subtilis PSF-19 isolated by us from vegetable raw materials (Passiflora preparation), which is capable of producing antimicrobial substance (AMV) suppressing pathogenic bacteria. The article discusses the method and conditions of extraction from the culture fluid fraction of AMV, active against Listeria monocytogenes – one of the dangerous intestinal pathogens that infect food. Using biochemical methods and mass spectroscopy, the molecular weight and the peptide nature of the active fraction of AMV were determined. A fraction of AMV with a molecular weight of 3,4–3,6 kDa has bactericidal activity, which is destroyed by treatment with proteolytic enzymes, which allowed it to be attributed to the group of low-molecular antimicrobial peptides – bacteriocins. The studies allow to consider the strain Bacillus subtilis PSF-19 as a producer of bacteriocin, especially effective against pathogens of intestinal listeriosis. The establishment of the fact of destructibility of proteolytic enzymes, finding the conditions of microbiological synthesis of AMV, its isolation and accumulation for research, provide opportunities for practical use as a means for decontamination of the environment instead of traditional antibiotics.

The article examines definitions of the concept «Competition» given by several dictionaries. In the article much attention is given to its place in biology and ecology in particular. It describes in detail the types of interactions between organisms and their groups in the biosphere and focuses on the competition as a sub-type mentioning its forms and the main resources organisms compete for. It is shown that people as a species experience competition as well. The article is of interest to biology and ecology students, who would want to develop their understanding of the concept «Competition».

Air is an unfavorable environment for the reproduction of microorganisms. The study of the air included: sampling from objects (dining room, toilet, clinic) and studying their microflora. Sedimentation and aspiration methods were used in the study of air samples. In the study of morphological properties, most of the isolated microorganisms are Gram-positive globular (80-90%) and only from sample No. 3 - rod-shaped Gram-negative. As a result of the study, we found that the most contaminated micro

This article presents the results of microbiological tests of soils in emergency oil and gas facilities in Yakutia. The author found that in the process of self-healing soil is not sufficiently cleansed of hydrocarbon contamination and are in the environmental stress. The signs of soil degradation are thinning or absence of vegetation, phytotoxicity, changes in physical and chemical properties of the soil: formation of lumpy soil structure, hydrophobicity, salinity, high pH values, lack of available phosphorus, nitrate nitrogen, ammonia nitrogen, phytotoxicity.