Role and responsibilities of a teacher in the lifelong learning sector

Teaching is quite challenging and demanding alongside with many other careers. The main role of every teacher is to involve and engage your students in learning activities. An appropriate level of language, appropriate terms understandable to your students will motivate them to learn mor

Simple model of the rf noise generated by multipacting electrons

A simplified analytical model is developed to predict the spectrum of electric current induced by the multipacting electrons between two parallel electrodes exposed to an rf voltage of fixed amplitude. The model is based on the resonant multipactor theory and makes it possible to calculate the relative spectral amplitudes of electric current at different harmonics and sub-harmonics of the applied rf frequency. The theoretical predictions are confirmed by numerical simulations of multipactor inside a rectangular waveguide. Specifically it is seen that the relative height of the spectral peaks decreases with increasing gap height

Analysis of phagoand antibiotic sensitivity of Enterobacteriaceae bacteria isolated from women of reproductive age

Pelvic inflammatory diseases occupy a special place in the structure of general morbidity, and are polymicrobial in nature with dominance of opportunistic microorganisms, in particular bacteria of the family Enterobacteriaceae. The aim was to study the composition of the vaginal microbiota in women of reproductive age with pelvic inflammatory diseases, as well as to determine the sensitivity of isolated microorganisms to antibiotics and bacteriophages. The study included 70 women of reproductive age, among them 37 were diagnosed with colpitis and cervicitis, 33 women in the comparison group (women screened for a diagnosis). Isolated microorganisms were identified by abdominoperineal methods, including the disk diffusion method to determine the sensitivity of microorganism cultures of Enterobacteriaceae family to antibiotics, and the method of crosses (evaluation of lytic activity of bacteriophages by the number of crosses) to determine the sensitivity to specific therapeutic bacteriophages. Vaginal biocenosis was characterized by deficit of lactobacilli (< 106 CFU/ml in 100 %), the presence of conditionally pathogenic microflora: bacteria of Enterobacteriaceae family, coccal flora and Candida fungi. From 60.0 to 89.3 % of Enterobacteria strains were resistant to aminoglycosides and quinolones, but also had a low level of sensitivity to therapeutic bacteriophages. The obtained data indicate the reduction of colonization resistance of vaginal mucosa in pelvic inflammatory diseases and specify the need to use medicinal drugs only under medical supervision to prevent clinically significant drug resistance

ТЕХНОЛОГИИ ВТОРИЧНЫХ ТУГОПЛАВКИХ РЕДКИХ МЕТАЛЛОВ (Обзор)

A brief review of A.V. Yelutin’s and his coworkers’ works in the field of rare metals is given. Zirconium, hafnium, tungsten, tantalum and niobium extraction processes from various types of recycled materials: scrap metal, scrap refractory materials, waste and scrap of hard metal, dormant scrap of capacitors are considered. The opportunities of improving the purity of these metals by electrolytic refining and electron-beam melting are shown.Приведен краткий обзор работ А.В. Елютина с его сотрудниками в области редких металлов. Рассмотрены технологии извлечения циркония, гафния, вольфрама, тантала и ниобия из различных видов вторичного сырья: металлических отходов, лома огнеупоров, отходов и лома твердых сплавов, амортизационного лома конденсаторов. Показаны возможности повышения чистоты этих металлов методами электролитического рафинирования и электронно-лучевой плавки

REGIONAL FEATURES OF BIFIDOBACTERIA ANTAGONISTIC ACTIVITY IN INTESTINAL MICROBIOTA OF CHILDREN LIVING IN SIBERIA

Antagonistic properties of bifidobacteria to opportunistic microorganisms in vitro and mechanism of antagonistic activity decreasing were studied and. analyzed. Great percentage of bifidobacteria regional population strains with low antagonistic activity to transitional opportunistic microorganisms is registered. It results to colonization. resistance decreasing and. requires development of the preventive probiotics therapy methods to correct

MICROECOLOGICAL AND GENESPECIFIC CHARACTERISTICS OF VAGINAL BIOTOPE LACTOBACILLI IN WOMEN WITH NONSPECIFIC LOWER FEMALE REPRODUCTIVE TRACT INFLAMMATORY DISEASES

The study included 30 reproductive age women with lower female reproductive tract nonspecific inflammatory diseases. The analysis of the qualitative and quantitative pathogenic microorganisms as well as lactobacilli composition was conducted. It was shown that in women observed the opportunistic microflora detected often (73,3 %) in the rest part of patients (26,7 %) in case if opportunistic microflora was absent the disbiotic changes occurred in lower concentration of normal microflora of vagina represented mostly by lactoflora. Deficiency of lactobacilli was observed almost in all women of this group (96,6 %) and only in one case (3,4 %) the concentration of lactobacilli was consistent with normal physiological range. Molecular genetic methods (PCR amplification) with visualization by means of electrophoresis in agarose gel was made for identification of Lactobacilli species. Consistency index (c) and species saturation index (sri) for opportunistic microorganisms in women vaginal biotope examined were calculated. Prevalence of Lactobacillus plantarum and Lactobacillus jensoni isolating in 83 and 50 % respectively was shown. Also it was shown that in the structure of quantitative compatibility of studied species of lactobacilli the highest rate is characterized to the association of two types that makes 53 %

ANTITOXIC ANTIDIFTHERIAL ANTIBODIES IN BLOOD SERA OF HEALTHY ADULTS UNDER DIFFERENT VACCINATION SCHEMES

In this work intensity of immunity to diphtheria on the basis of indicating antitoxic antidiphtherial antiboies level in the blood sera of healthy adults aged 20 to 51 and elder, living in England, Italy, Latvia, Lithuania, Russia and Finland is analyzed. Diphtheria disease incidence shift through the epidemic in 1993—1996 in Russia to the elder age groups had resulted in inclusion of obligatory adults revaccination each 10 years after the last revaccination of teenagers in 14 year in 1998. Chosen tactics of vaccinal prevention of diphtheria didn't find reflection in National prophylactic immunization calendars of other countries including European, except Finland. On the basis of the received analysis for optimization of diphtheria vaccinal prevention, authors offer: to transfer a revaccination of children from age of 18 months to age of 3—6 years (according to the scheme in Italy, England, Finland); to carry out vaccination of adults individually depending on antitoxic antibodies concentration in blood sera

ANTITOXIC ANTIDIPHTHERIAL ANTIBODIES IN BLOOD SERUM OF HEALTHY ADULTS UNDER DIFFERENT VACCINATION SCHEMES

Intensity of immunity to the diphtheria is analyzed, in the article according to the levels of antitoxic antibodies in blood serum, of healthy adults from 20 to 51 years and older who live in England, Italy, Latvia, Lithuania, Russia and. Finland. In Russia displacement of morbidity during the epidemic of 1993—1996 to the older age groups caused, inclusion of compulsory revaccination of adults every 10 years after the latest vaccination, of teenagers in 14 years in National calendar of o prophylactic vaccination, in 1998. Chosen tactics of vaccinal prevention, wasn't included, in National calendars of o prophylactic vaccination, of other countries including European except for Finland. On the basis of the analysis for the optimization, of vaccinal prevention, of diphtheria the authors propose: to transfer revaccination of children from the age of 18 months to the age of 3—6 years (like in Italy, England, and. Finland), to realize vaccination, of adults individually taking into account the content of antitoxic antibodies in blood serum.. Key words: diphtheria, vaccinal prevention, antitoxic antibodie

CONTENTS DIPHTHERIA ANTITOXIC AND ANTIBACTERIAL ANTIBODIES IN THE SERUM OF HEALTHY ADULTS

In the article using the binomial distribution analysis of the intensity of рориlation antitoxic (AT) and antibacterial (AB) of immunity to diphtheria in terms of specific diphtheria antibodies in the sera of healthy adults aged 20 to 51 years and. older, living in Russia and. Italy. The latter, in contrast to Russia, during the epidemic was only a few cases of diphtheria. For the population of people from Italy the optimal parameters of tension antibody immunity (bimodal distribution of the concentrations of AT antibodies) are determined, whereas for the adult population of Russia experienced an abnormally high, overvoltages antibody immunity (lack of bimodal distribution). The level of concentration of antibody isotypes AB M, G, A in both countries match the total synthesis of immunoglobulin isotypes in the ontogeny of these: thus, in the sera of adults aged 20 to 40 years AB antibody IgG prevail. Low concentrations of antitoxin in the blood of most adults living in Italy, recharged high AB IgG in these same serum, and. optimal concentrations of AB IgM and. IgA. This indicates the possibility lifting the mass revaccination of adults, and. creating an individual approach to their boosters. Optimal bimodal distribution of AB antibodies in the population of healthy adults, both in Russia and. in Italy, is an additional protection to the diphtheria antitoxic resistance