Methodical instructions for laboratory works on the discipline "Electric machines"

This edition is dedicated to expand the theoretical knowledge of foreign students on the "Electric machines" discipline. The objects of study are transformers and electric machines, which are the basis of electric power in various industries. The subject of this course is electric machines, which are used in practice to convert one form of energy into another: mechanical to electrical (generator), electri-cal to mechanical (electric motors), and power transformers, which are used to con-vert the parameters of AC current and voltage

Методичні вказівки до лабораторних робіт по дисципліні "Електричні машини"

The edition is dedicated to expand the theoretical knowledge of foreign students on the "Electrical machines" discipline. The objects of study are transformers and electric machines, which are the basis of electric power in various industries. The subject of this course is electric machines, which are used in practice to convert one form of energy into another: mechanical to electrical (generators), electrical to mechanical (electric motors), power transformers, which convert the AC parameters, current and voltage.Видання присвячено розширенню теоретичних знань iноземних студентів з дисципліни "Електричні машини". Об'єктами дослідження є трансформатори та електричні машини, які є основою електроенергетики в різних галузях промисловості. Предметом даного курсу є електричні машини, які використовуються на практиці для перетворення однієї форми енергії в іншу: механічної в електричну (генератори), електричної в механічну (електродвигуни), а також силові трансформатори, які перетворюють параметри приладів змінного струму (струм та напругу)

Study of the effect of selective inhibitor of arginase II KUD 975 and of low doses of acetylsalicylic acid on the functional parameters of the cardiovascular system In experimental preeclampsia

The article considers study of the effect of selective inhibitor of Arginase II KUD 975 and of low doses of acetylsalicylic acid on the functional parameters of the cardiovascular system In experimental preeclampsi

Integration of the problem of medical ecology on the level of the highly urbanized region

The urgency of the analyzed issue is due to the study of the basic issues of medical ecology: the dynamics of demographic indicators, the correlation of somatic and reproductive public health, depending on the influence of physical factors of the urban environment on public health on the basis of medical and geographic mapping. The article aims at the analysis of the environmentally determined disorder of the urbanized territory. The leading approach to the study of the issue of medical ecology is a medical and geographical mapping, which allows identifying the most affordable and common areas of multi-component medical and environmental maps. While analyzing the impact of various aspects of the environment on human health, the priority is given to risk factors that directly lead to the emergence of diseases. The contents of the article may be useful to justify the choice of the rational approach to public health as a redistribution mechanism to reallocate the space of ecological niches. © 2016 Rozenberg et al

Main indicators of honey quality and their relationships

Harmonization of product quality requirements contributes to increasing the competitiveness of domestic honeys on foreign markets. The purpose of the research was to establish the main quality indicators of honey samples of various botanical origins in accordance with the requirements of national regulatory documents. The material of the research was 115 samples of acacia, linden, buckwheat honey, sunflower and various herb honey. Sampling of honey and analysis of organoleptic indicators, honey color and moisture content, diastase and proline content, acidity was carried out in accordance with DSTU 4497: 2005. According to the results of organoleptic tests, it was found that in terms of color, taste, aroma, consistency, all samples met the requirements of regulatory documentation, as well as in terms of physicochemical parameters: the average values of the mass fraction of water for acacia honey 17.7 ± 1.2 %, linden – 17.5 ± 1.0 %, buckwheat honey – 18.6 ± 0.5 %, sunflower honey – 17.1 ± 3.5 %, herb honey – 17.8 ± 1.0 %; the value of the diastase number in different types of honey is from 5.05 to 57.3 Goethe units. Among the analyzed honey samples, 7 samples of acacia honey had the lowest enzymatic activity (from 5.05 to 11.92 units Goethe); content electrical conductivity of acacia honey 0.1 ± 0.01 mS/cm, linden – 0.5 ± 0.1 mS/cm, buckwheat honey – 0.4 ± 0.1 mS/cm, sunflower honey – 0.3 ± 0.0 mS/cm, honey from different herbs – 0.3 ± 0.0 mS/cm; the content of free acids was: acacia honey – 25.4±5.8 meq/kg, linden honey – 26.4 ± 3.9 meq/kg, buckwheat honey – 33.1 ± 3.0 meq/kg, sunflower honey – 26.5 ± 5.3 meq/kg, honey from different herbs – 26,7 ± 5.9 meq/kg. The results of the study of 115 samples of honey of different botanical origin according to organoleptic and physicochemical indicators meet the requirements of regulatory documents

Semantic features of the phraseological units with the component light within the artistic discourse

Conduct lexical and semantic analysis on the concept light in the artistic discourse of postmodern fictio

The research of abnormal toxicity and local irritant effect in the Draize test of the drug furacilin, concentrate for the preparation of a solution for local and externaluse

The research of abnormal toxicity and locally irritating effect of the drug Furacilin, concentrate for the preparation of a solution for local and external use in comparison with the drug Furacilin, tablets for the preparation of the solution, was carried ou

Synthesis of High-Purity Silica Nanoparticles by Sol-Gel Method

Colloidal silica (silica sol) nanoparticles were synthesized by ammonia- and hydrochloric acid-catalyzed hydrolysis of tetraethoxysilane with subsequent condensation and polymerization. Silica particles with the size of 12‒160 nm were obtained at different temperatures and ratios of the initial reactants and studied by means of TEM, AFM, IR spectroscopy and zeta-potential measurements. The reaction conditions providing the minimum particle size in the final product of the most complete hydrolysis were determined. At pH above 8.5, an increase in the SiO2 content of the sol to 23 wt.% did not change the particle size. At a low (~ 1.8 wt.%) SiO2 content of the sol, a wide variation in pH also did not exert a significant effect on the particle size. Stability of the silica sols synthesized in an alkaline medium was enhanced by the replacement of alcohol with water during evaporation at pH 8.5‒9.5. The possibility to produce silica sols with the required characteristics (particle size, pH, stability, purity, and SiO2 content in an aqueous or alcohol medium) makes them applicable in various industries

FREQUENCY AND METHODS OF CORRECTION OF MAGNESIUM DEFICIENCY IN YOUNG WOMEN OF REPRODUCTIVE AGE AT TAKING COMBINED ORAL CONTRACEPTIVE PILLS

Magnesium is one of the important elements, necessary for the most of biochemical reactions, including those in nerve tissue. Magnesium insufficiency takes a leading position in the structure of elemental status pathology. 20-63 % of females of 18-45 years have borderline or moderate magnesium deficiency. Earlier conducted studies showed decreased level of magnesium in blood serum of women using combined oral contraceptive pills (COCP). We examined 137 young females of reproductive age (average age -19,1 ± 1,1 years) and defined the level of magnesium in blood serum and 24-hour urine at the background of taking COCP. Depending on the level of magnesium in blood serum all women were divided into 2 groups. Females who planned to use COCP and had initially normal level of magnesium in blood serum (n = 88) were randomized to form groups of observation and prophylaxis (with the use of magnesium preparations). All women with reduced level of magnesium (n = 49) together with hormonal contraceptive were prescribed magnesium preparation in combination with pyridoxine. The women with preventive use of magnesium-containing preparation had no significant reduction of magnesium level either in blood or in urine. And the women with reduced Mg level who were taking COCP and received magnesium-containing preparation in combination with pyridoxine had increased level of magnesium in blood serum and 24-hour urine. Thus, prescription of magnesium preparations in combination with pyridoxine to young women of reproductive age using combined oral contraceptive pills has been proved reasonable for reducing the risk of magnesium deficiency

Endometrial morphology in women of reproductive age with PCOS

Background. Polycystic ovary syndrome is the most common endocrine disease in women, affecting various aspects of health. The results of several studies indicate an increased prevalence of hyperplasia or endometrial cancer in women with PCOS, but there are no clinical recommendations on the need for assessing the endometrial condition in PCOS and approaches to predictions. Aim: to determine the frequency and structure of endometrial pathology among reproductive-aged patients with PCOS. Materials and methods. In a cross-sectional survey, we examined 1200 women who are subject to annual preventive examination. The research period was May - December 2017. The diagnosis of PCOS was made according to the consensus criteria adopted in May 2003 in Rotterdam. Participants signed informed consent for the survey. Results. We found 102 women with a verified diagnosis of PCOS. 56 of them completed their participation in the study; the median age was 32.19 ± 5.67 years. All patients underwent a biopsy of the endometrium with immunohistochemical examination. Features of the structure of the endometrium: a normal endometrial characteristic in 24 women (42.9 %), chronic endometritis -18 specimens (58.1 %), abnormal hypoplastic endometrium - 6 (19.4 %), simple endometrial hyperplasia -1 (3.2 %) adenocarcinoma -1 (3.2 %), proliferative endometrium with disorders - 7(22.6 %). Conclusions. In the examined women with PCOS there was a high incidence of histologically confirmed endometrial pathology, in the structure of which chronic endometritis predominates. The foregoing necessitates new research and development of clinical protocols for the timely detection of endometrial pathology in PCOS