Note on the stability criteria for a new type of helical flows

In this paper, we proceed exploring the case of non-stationary helical flows of the Navier-Stokes equations for incompressible fluids with variable (spatially dependent) coefficient of proportionality between velocity and the curl field of flow. Meanwhile, the system of Navier-Stokes equations (including continuity equation) has been successfully explored previously with respect to the existence of analytical way for presentation of non-stationary helical flows of the aforementioned type. The main motivation of the current research is the exploring the stability of previously obtained helical flows. Conditions for the stability criteria of the exact solution for the aforementioned type of flows are obtained, for which non-stationary helical flow with invariant Bernoulli-function is considered. As it has been formulated before, the spatial part of the pressure field of the fluid flow should be determined via Bernoulli-function, if components of the velocity of the flow are already obtained.Comment: 10 pages, 1 figures; Keywords: Navier-Stokes equations, non-stationary helical flow, Bernoulli-function; this note corresponds to the article which was accepted for publication in "Journal of King Saud University - Science" (03 July 2018), DOI 10.1016/j.jksus.2018.07.00

Living conditions and reproductive installation of women living in the cities of Irkutsk region

According to the survey the effect of the conditions of family life on the reproductive behavior of women was studied, as well as the comparative characteristic of matrimonial and reproductive orientations of women with children and women without children (female students) living in the cities of Irkutsk region. The dependence between the housing and the material conditions of the family and the number of children ever born was determined: the average number of children born by women from families with their own housing and living separately from other relatives were higher, average number of children from women from families with rather high income was lower than from ones who considered theirfamilies to have low and extremely low income. Reproductive intentions the two-child and one-child women give birth to another baby hampers the availability of material and housing problems. The average number of children was higher in women with secondary special education, employees in private enterprises and workers in large industrial enterprises. Achieving success in family life is a factor for the well-being for the majority of women with children, and does not depend on the number of children. For the girls, along with success in family life the opportunity to "power over people" is also important. The fact of having children does not affect the formation of marital and family systems: both categories of respondents are not sufficiently developed to implement the installation of household functions of the family and the low importance of sexual relations in marriage, they are more focused on achieving social viability and prone to egalitarianism. The girls have more developed focus on the educational function of children than women. Indicators ideal medium, the expected and desired number of children in two and three-child women is higher than the ones in single-child women and girls who do not have children

Synthetic Melatoninergic Ligands: Achievements and Prospects

TesisLa investigación que se presenta tiene como objetivo principal analizar las ventajas competitivas de las empresas representativas de bebidas gaseosas en el Perú durante el periodo 2015-2016. Se trabajó con un diseño de investigación no experimental porque la variable no se ve afectada por la investigación a estudiar, el tipo de diseño es transversal porque se ciñe al estudio en un tiempo determinado; descriptiva porque solo se realizó el análisis y descripción de las teorías de las ventajas competitivas en las empresas representativas de bebidas gaseosas en el Perú durante el periodo 2015-2016 y cualitativo porque se basa en recolección de datos sin medición numérica como el análisis documental, memoria anual y entrevistas de profundidad a colaboradores estratégicos de las empresas Arca Continental Lindley y Aje Group

Non-obvious Problems in Clark Electrode Application at Elevated Temperature and Ways of Their Elimination

Well-known cause of frequent failures of closed oxygen sensors is the appearance of gas bubbles in the electrolyte. The problem is traditionally associated with insufficient sealing of the sensor that is not always true. Study of a typical temperature regime of measurement system based on Clark sensor showed that spontaneous release of the gas phase is a natural effect caused by periodic warming of the sensor to a temperature of the test liquid. The warming of the sensor together with the incubation medium causes oversaturation of electrolyte by dissolved gases and the allocation of gas bubbles. The lower rate of sensor heating in comparison with the medium reduces but does not eliminate the manifestation of this effect. It is experimentally established, that with each cycle of heating of measuring system up to 37 ∘ C followed by cooling the volume of gas phase in the electrolyte (KCl; 60 g/L; 400 L) increased by 0.6 L approximately. Thus, during just several cycles it can dramatically degrade the characteristics of the sensor. A method was developed in which the oxygen sensor is heated in contact with the liquid, (depleted of dissolved gases), allowing complete exclusion of the above-mentioned effect

Detection of genes of pathogenicity of symbiotic microflora in adjacent biotopes in women with chronic endometritis and reproductive disorders

Recent researches established microecological relationships between intestinal, vaginal and nasopharyngeal biocenoses in the composition of a macroorganism microbiome. This study included 57 women with chronic endometritis and 21 woman without it (control group). In women with chronic endometritis all studied pathogenicity genes (asal, cylA, stxl and stx2) were identified in representatives of symbiotic microflora in all three studied habitats - vaginal, intestinal and nasopharyngeal, which confirms the presence of a reservoir of potential pathogenicity. Studied genes of pathogenicity were diagnosed in women with CE in 8 cases of the bacteria of the species E. faecalis and E. faecium, which are "harbingers" of impending serious problem. This indicates the importance of these species in etiopathogenetic structure of microbiocenoses of studied habitats, and, possibly, their impact on the course of this disease

PATHOGENIC POTENTIAL AND MUTUAL INTERACTION OF MICROFLORA OF MUCOUS MEMBRANES OF OPEN CAVITIES OF DIFFERENT BIOTOPES IN WOMEN AS IMPORTANT FACTORS OF THEIR REPRODUCTIVE HEALTH

Micro-ecological interrelation between intestinal, vaginal and nasopharyngeal biocoenoses as parts of microbiome of a macroorganism was determined by the latest researches. The research included 44 women with inflammatory diseases of genital tract and reproductive disorders and 28 healthy women. Genospecies structure of enterococcus for each biotope (intestinal, vaginal and nasopharyngeal) had original differences with the most full spectrum of species in intestinal biotope. The contract between the groups is evident at the conclusion of the pathogenicity genes tests

НЕСТАЦИОНАРНЫЙ КАПИЛЛЯРНЫЙ ВИСКОЗИМЕТР ДЛЯ КРОВИ

The work is devoted to the development of the theoretical foundations of the processing of measurement results and the algorithm for processing the results for automating measurements for a non-stationary capillary viscometer. The proposed algorithm allows achieving measurement performance and obtaining hemorheological data for diagnostic purposes with a satisfactory degree of accuracy. The results obtained with use of non-stationary capillary viscometer are compared with results achieved with use of rotational viscometer.Работа посвящается разработке теоретических основ обработки результатов измерений и алгоритма обработки результатов для автоматизации измерений для нестационарного капиллярного вискозиметра. Предложенный алгоритм позволяет достичь быстродействия измерений и получить гемореологические данные для диагностических целей с удовлетворительной степенью точности. Приводится сравнение результатов, полученных при использовании нестационарного капиллярного вискозиметра, c результатами, достигнутыми при использовании стандартного ротационного вискозиметра

Characteristics of Nasopharyngeal Microbiocenosis and Evaluation of the Interaction of its Associates in Women with Chronic Endometritis

The upper respiratory tract is one of the most important biotopes in the human body. Therefore, in order to understand the cause-effect relationships between the microbial world and the pathological state of a person, it is crucial to clarify the relationship of the microbes-associates.The study involved 74 women with reproductive disorders. The main group – women with chronic endometritis (n = 47). The diagnosis of chronic endometritis was revealed on the basis of morphological signs of histological examination of aspirates from the uterine cavity. The comparison group consisted of 27 women, in whom the chronic endometritis was not confirmed. When applying, women complained more often of infertility and (or) miscarriage. Of the accompanying extragenital diseases, chronic tonsillitis in women of the studied groups was most often diagnosed. Therefore, it was important to give a microbiological description of the nasopharyngeal biotope of these women, as one of the factors that influences the reserves of confrontation of the reproductive function of the body to infections. Nasopharyngeal microbiocenosis of women with chronic endometritis was characterized by deficiency of the indigenous microbiota and a permanent presence in the microbiocenosis of the absolute pathogen (S. aureus) and transient species (enterococci, CNS). Between the representatives of normoflora antagonistic relations were established. The obtained results indicate violations in the nasopharyngeal biotope of these women, which can cause immunodeficiency and, as a consequence, the development and flow of chronic endometritis

Role of portocaval shunts in development of complications after liver transplantation

Rationale. Portal blood flow is a key component in the viability of the liver transplant. Portocaval shunts formed on the background of the liver cirrhosis before transplantation can cause portal vein steal syndrome, with subsequent development of ischemic necrosis of the graft. To date, the tactics of treating patients with portal vein steal syndrome during liver transplantation has not been sufficiently developed. This paper presents a literature review and our own experience on this important, but little-studied issue. Purpose. The purpose of this research is to study the role of portocaval shunts in the development of complications after liver transplantation, based on a retrospective analysis of clinical cases. Conclusions. In liver transplantation, portocaval shunts can cause the development of portal vein steal syndrome with subsequent development of liver failure. For the diagnosis of portal vein steal syndrome, it is important to use the data obtained at all stages of liver transplantation. Surgical correction of portal vein steal syndrome can be performed during liver transplantation and in the early postoperative period. © 2022 by the authors