We studied respiratory activity and microviscosity of mitochondrial membranes from the left ventricular myocardium of 2-month-old (
n
=8) and 15-month-old (
n
=8) rats. The respiratory control (RC) ...during substrate phosphorylation was calculated as the ratio of oxygen absorption rates in the presence of ADP and after its utilization. In 2-month-old rats, RC was 4.66 (4.56; 4.71); in 15-month-old animals, it was significantly (
р
<0.05) lower: 3.57 (3.50; 3.62). Pyrene probe eximerization indices for regions of protein-lipid and lipid-lipid interactions in mitochondria of 2-month-old animals were significantly lower than in the group of 15-month-old rats, which indicated reduced microviscosity of the lipid environment of proteins. Thus, the decrease in RC of mitochondria from the left ventricle of 15-month-old animals and the increase in the microviscosity coefficients of their membranes indicate age-related changes in the structural and functional activity of mitochondria.
At the present time virtually no data are available about the structure of the genus Candida fungus able to target HIV-infected patients and serve as an etiological factor of candidiasis. The ...aforementioned shaped the aim of the study: to examine structure of the Candida genus community colonizing the oropharynx in HIV-infected patients with clinical manifestations of oropharyngeal candidiasis. There was conducted a microbiological study of the oropharynx in 31 HIV-infected patients (51.6% males and 48.4% females) with clinical manifestations of oropharyngeal candidiasis treated at Moscow Infectious Clinic No. 2 inpatient department in the years 2015–2017. We confirmed the diversity of the oropharyngeal Candida spp. community found in HIV-infected patients. Total 52 isolates of the genus Candida were isolated. C. albicans dominated in 57.7% cases, whereas C. glabrata prevailed (21.1%) among non-albicans species. Minor components were represented by C. tropicalis (11.5%) and C. krusei (9.6%). C. albicans and C. glabrata were sensitive to polyenes, whereas minor community components — to itroconazole and clotrimazole. The vast majority of fungal strains were resistant to fluconazole. The genus Candida community reveals a unique architecture so that any member may exist in the oropharyngeal biotope of HIV-infected patients as a monoculture or in association: homogeneous, consisting of a single species strains, or heterogeneous, formed by several species. Candida fungi in 18 patients (58.1%) were isolated as a monoculture, whereas in 13 (41.9%) subjects — in association consisting of 34 isolates (65.4% of total number), of which 16 (30.8%) and 18 (34.6%) were isolated from homogeneous and heterogeneous associations, respectively. There were identified 9 two-component associations (69.2%), and 4 (30.8%) consisting of three or more components. It turned out that pattern of the examined community was mainly determined by species composition that agrees with previous data. Most common associations were presented by C. krusei (100%) and C. albicans (73.3%). Upon that, most often C. albicans (72.7%) formed a homogeneous type of associations. Sensitivity of Candida fungi to antimycotic drugs also depended on the architecture of related community. C. albicans isolates in heterogeneous associations revealed a wide range of resistance acquired by contact with non-albicans species.
The aim was to determine how often the PCR method is used in different laboratories in Russia. In 2018, we conducted a questionnaire survey in diagnostic laboratories of medical organizations and the ...Centers of Hygiene and Epidemiology that performed PCR studies to identify microorganisms of the genus Bordetella in all 85 Russian regions. We found that in 2013 the PCR was used in 33 (38.8%) regions, but in 2017 the number of regions increased to 64 (75.3%). During 2013-2017 the study has not been applied in 21 regions. The number of PCR tests performed in the laboratories of medical organizations was significantly different. There has been an increase in the number of tests for the diagnosis of pertussis among people with clinical signs of infection and among contact persons in foci of infection. Compared to the Centers of Hygiene and Epidemiology, in medical organizations the rate of introduction of the PCR was higher. Between 2013 and 2017 the proportion of samples containing DNA B.pertussis decreased, but the proportion of samples containing DNA of other representatives of the genus Bordetella increased. Moreover, in the case of isolation DNA Bordetella spp. clinicians diagnose «Whooping cough, other unspecified organism», since there is no information on the species of the pathogen. Thus, in order to improve the diagnosis of pertussis, it is necessary to optimize PCR tests by including target genes that allow to identify of currently relevant DNAs of different representatives of the genus Bordetella.
We developed a method of pulse-periodic laser action has to create an ordered heterogeneous structure of CuO / ZnO. We performed pulse-periodic irradiation of a CO2 laser ROFIN DC 010 into two types ...of brass samples L62: grinded and surface etched after grinding. It we found that when the beam power was increased in the range 270-330 W, the density of nanowires increased, shorter and wider nanowires formed. The synthesized nanowires reinforced on the surface had a length of ~ 0.5-3 μm, a diameter of ~ 40-90 nm. The surface of the Cu-Zn alloy subjected to etching had a clearly discernable grain boundary with a grain size in the range of ~ 40-100 μm. The surface of the samples after etching consisted of pure copper. As a result of oxidation at the grain boundaries, whose size decreases to ~ 20-30 μm, growth of ZnO nanowires was observed. When an increase in the duration of oxidation by using laser action to air, the growth of ZnO nanowires has became more intense. Obtained results are important to solve the tasks of laser information technologies. These results are a basis for software creating to control of lasers that provide required processing modes of materials.
The purpose of the work was to assess the state of bacteriological diagnosis of diphtheria infection in Russia in order to establish possible reasons for the decrease in the release of C. ...diphtheriae. The Reference Center for Monitoring the Pathogens of Measles, Rubella, Mumps, Pertussis and Diphtheria in 2018 in 85 subjects of Russia conducted a questionnaire of laboratories of medical organizations and the Centers for Hygiene and Epidemiology of Rospotrebnadzor, carrying out bacteriological studies for diphtheria infection. It was found that the number of studies conducted over the five-year period decreased by 1.2 times. The tendency to decrease the number of bacteriological studies for diphtheria is observed in the territories of almost all federal districts. In 99% and 29% of cases, the institutions of the FBUZ Centers for Hygiene and Epidemiology and medical organizations (MO) and use in their work documents regulating bacteriological studies for diphtheria infection. In a number of territories, the list of documents used includes documents that are invalid or do not define such studies. Most organizations use dry tampons when examining for diphtheria, however, 13.1% and 53.4% of FBUZ Centers for Hygiene and Epidemiology and medical organizations (respectively) use commercial transport environments, which does not comply with regulatory documentation. Analysis of the quality of work of bacteriological laboratories showed shortcomings at the stage of preparation of media (use of donor blood, or absence of addition of blood and potassium tellurite), Elek tests (addition of horse serum or absence of serum to the medium), setting of incomplete biochemical series (absence of tests for urease and nitrate reductase), absence of standard control strains, incomplete volume of internal laboratory quality control. Given the continuing circulation of the pathogen in various countries of the world and in our country, as well as the possibility of imported cases of infection from endemic regions, the analysis was aimed at drawing the attention of specialists to the problem of improving the quality of laboratory diagnosis of diphtheria in Russia.
Introduction.
The information society changes many familiar phenomena of traditional society. These include, first of all, culture, which acts as an indicator that civilization is moving to a new ...stage of development. In the information age, significant changes are taking place in the culture. In the works of scientists, a categorical apparatus is developed that allows describing and studying new phenomena. The category "information culture" is one of such innovations in the scientific literature. However, research shows that a unified approach to understanding the essence of this phenomenon has not yet developed.
In the study of information culture, the issues of its relationship with society and the individual are well developed, and the possible social consequences of its development and implementation in all spheres of human life and activity are presented. However, the weak point or "white spot" remains the study of its nature, essential, attribute, and substrate properties.
The purpose of this article is to substantiate the relevance of developing a substratum-attribute model of information culture within the framework of the philosophy of culture.
Materials and Methods.
The main research methods used were analytical review, analysis, grouping, generalization, comparison, and substrate approach.
Results:
the analysis of works devoted to the philosophical and cultural research of information culture has shown that researchers of the nature and essence of information culture as a category of cultural philosophy pay insufficient attention to the development of its substratum-attribute model. There are practically no complete system studies that result in the construction of a substratum-attribute model of information culture.
Discussion and Conclusions.
The studied models of information culture do not fully reflect its nature, essential features and qualities that allow us to understand the causes and mechanisms of its influence on the course of civilizational, social and anthropological changes. Therefore, the development of a substratum-attribute model of information culture is due to the need to identify the causes of possible changes in the generic qualities of a person that occur under its influence as a socio-cultural phenomenon.
The aim of the work was to develop an accelerated genodiagnosis method based on mPCR-RT for the detection DNA of B. pertussis, B. parapertussis, B. holmesii.
The study used 104 strains of ...microorganisms, of which: 50 strains of B. pertussis, 37 - B. parapertussis, 17 - heterologous species of microorganisms. Assessment of analytical specificity was carried out using DNA strains of various microorganisms with a concentration at least 109 GE / ml. To check the analytical sensitivity we studied a series of serial dilutions of bacterial cultures of the control strains B. pertussis № 143, B. parapertussis № 38b, B. holmesii DSM 13416 with a concentration of 5x109 - 5 μm/ml.
Insertion sequences were chosen as diagnostic targets: for B. parapertussis - a specific fragment IS1001, for B. holmesii - a specific fragment hlIS1001, for B.pertussis - a fragment IS481. To develop a genodiagnosis method specific primers were designed and combined into a single multi-primer mixture, the composition of the reaction mixture and the amplification conditions were selected. The analytical sensitivity of the developed method for detecting pertussis and pertussis-like pathogens was 5×101 GE / ml. Verification of the developed methodology of gene diagnostics showed 100% analytical specificity.
An accelerated genodiagnosis method based on mPCR-RT has been developed, it allows you to identify DNA of B. pertussis, B. parapertussis, B. holmesii, which expands the possibilities of examining patients with suspected pertussis and pertussis-like diseases in order to increase laboratory confirmation of the diagnosis.
We examined trends in expansion patterns and relative abundances of Dreissena bugensis in reservoirs and major river systems in eastern Europe. Based on our own data and data from the literature, it ...is apparent that trends were variable across river basins and not easily related to environmental conditions. In some cases these did not conform to the patterns typically found for dreissenids. In the early period of expansion beyond its native range in the Dnieper-Bug delta and estuary, D. bugensis rapidly replaced Dreissena polymorpha in the upper Dnieper River system, but increased only gradually and over time became less abundant relative to D. polymorpha in the Don-Manych River system. Contrary to the Dnieper and Don River systems, in the Volga River system considerable spatial variability in relative abundances was apparent, particularly in northern reservoirs. Moreover, even though D. bugensis usually displaces D. polymorpha as the dominant dreissenid, the latter can remain dominant in certain types of habitats where conditions are less favourable for the former. Suggested factors that may be responsible for differences in invasion patterns in the river systems may include differential responses to temperature, or to some other factor(s) associated with geographical latitude, the level of water mineralization, and selective predation by molluscivorous fish. In particular, the northward expansion of D. bugensis seems to be limited by temperature. The lack of long-term data on appropriate scales precludes linking these differences to specific features within the environment, but our comparisons indicate that the expansion of D. bugensis relative to D. polymorpha is more complex than previously believed.
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