The variability of the star was found by C. Hoffmeister in 1936. The star thoroughly was investigated by V. P. Tsessevich, which determined the primary ele- ments of period: Max. hel. J.D. = 2436047.522 + 0.6130535 E, and discovered the sophisticated shape of light variation curves, known as Bllazhko effect (40.64 day) (Tsessevich, 1961, 1966). He mentioned, that the curve of maximum height shows considerable dispersion, and it seems, that the most part of time we ob- serve the weakene...

We report the discovery of a new SU UMa-type dwarf nova, Gaia18aak/ AT2018C, based on its optical observations, which were performed at ve observatories (Lisnyky/Kyiv, Terskol, CrAO, Mayaki/Odessa and Star a Lesn a, Slovakia) with six small telescopes. The observational campaign started just after the alert was published by ESA Gaia, DPAC and the Photomet- ric Science Alerts Team (http://gsaweb.ast.cam.ac.uk/alerts); the object was very intensely observed during the rst month. After t...

Безперервний моніторинг стану космічних об'єктів (КО) в навколоземному просторі необхідний для вирішення проблем: Запобігання зіткнень активних об'єктів між собою або з об'єктами, що є космічним сміттям; Активного очищення навколоземного простору від космічного сміття; Ідентифікації космічних апаратів невідомого призначення; Планування запуску нових штучних супутників Землі (ШСЗ).

The combined relativistic energy approach and relativistic many-body perturbation theory with the zeroth order density functional approximation is applied to determination of the energy and spectral parameters of the resonant Auger decay for neon atomic system. The results are compared with reported experimental results as well as with those obtained by semiempirical and ab initio Hartree-Fock methods. The important point is linked with an accurate accounting for the complex exchange-cor...

The electrophysical characteristics comparative studies were carried out for ZnO films obtained by chemical precipitation from zinc acetate solutions and thermal oxidation of zinc films. The ZnO films showed optical absorption and band gap (2.9 to 3.2 eV) specific for this material, which indicates the presence of crystalline structure in them. The use of polyvinyl alcohol made it possible to obtain samples with the highest values of E g and electrical resistance, which is caused by the...

Abstract – iron doped zinc sulfide nanocrystals were obtained by colloidal synthesis using gelatin, lactose or polyvinyl alcohol as a stabilizing matrix. The structure of the nanocrystals was determined using X-ray diffraction (XRD). The influence of the concentration effect on the size and properties of ZnS nanocrystals, the optical absorption spectra and photoluminescence spectra were studied, and the types of optical transitions in these nanocrystals were determined.

In this paper we are presenting optical telescopes of Astronomical Observatory of I. I. Mechnikov Odessa National University. We are describing technical characteristics and scientific program for each telescope. Here we also present a description of the tools with which the unique collections of astroplates were obtained under the program “The Sky Service”. Odessa Observatory (46°.28 N, 30°.45 E, altitude 64 m, observation code 086) it has several observational stations. Among them: M...

Мы представляем результаты анализа эволюции кометоподобных орбит семейства Юпитера шести метеорито-производящих групп, включающих спорадические болиды из метеорной базы данных IAU MDC-2007, спорадические метеоры из SonataCo базы данных, обыкновенные хондриты типа H5, L3.5, наблюдавшиеся инструментально, и околоземные астероиды − потенциальные родительские тела исследованных групп. Мы выполнили численное интегрирование орбитального движения членов метеорито-производящих групп в течение несколь...

The observations of the meteors and bright fireballs by meteor stations and fireball networks allows to get the more precise data on atmospheric trajectories and heliocentric orbits of this bodies. In recent years, several works were published on the subjects of the annual occurrence of fireballs. On the base of the Millman Fireball Archive the time of occurrence data for 2373 fireball events observed from across Canada was studied Beech [1]. An analysis of the frequency of the super...

Біоплівки, виявлені на поверхнях рослин, складаються з екзополімерного матриксу та різноманітних мікробіальних морфотипів-бактерій, нитчастих грибів та дріжджів. Мікроорганізми утворюють біоплівки на усіх частинах рослини: коренях, стеблах, листі, включаючи верхні та нижні поверхні та краї (Morris, 1997). Метою дослідження було вивчення здатності до формування біоплівок у деяких представників мікробіоти рослин.

Evaluation of Lactobacillus plantarum strains perspective for plant protection or fermentation of food of plant origin should include tests on abilities to attach to plant surfaces and to form biofilms. Comparing RAPD-profiles with these properties and also with geographical origin of the strains is necessary to find out the possibility of rapid selection of the strains and tracking their dissemination. Biofilm formation and RAPD-PCR profiles of 30 strains of L. plantarum isolated from grape ...

Seventy-eight isolates of lactic acid bacteria from Ukraine and Thailand were screened for bacteriocinogenic activity against indicator strain Lactobacillus sakei subsp. sakei JCM 1157. One isolate showed an antagonistic activity of cell-free supernatant eliminated after the treatment with Proteinase K. Based on 16S rRNA gene sequence, this isolate was identified as Enterococcus italicus. Bacteriocin produced by this strain showed antimicrobial activity against L. sakei subsp. sakei JCM 11...

The aim of the study was to determine the cellular lipids fatty acid composition for identification of the Bacillus subtilis ONU 551 strain bacteria, which is a phenol destructor. Fatty acids analysis of B. subtilis ONU 551 strain was performed using an automatic system for microorganisms’ identification MIDI Sherlock (MIDI , USA ) based on gas chromatograph Agilent 7890. Chromatograms analysis showed that the fatty acid spectrum of the strain B. subtilis ONU 551 consisted predominately o...

The aim of this study was a determination of the fatty acid composition of cellular lipids and identification of the strains, isolated from the wastewater of pharmaceutical production, – the destructor of aromatic xenobiotics. The phenotypic characteristics and cellular fatty acid (FA) composition confirmed the strain belonging to the Aeromonas ichthiosmia with the similarity index of library data MIDI Sherlock - 0.564. Analysis of the cellular FA composition of the strain Aeromonas ichth...

The search for new environmentally safe biological products designed to clean the environment from toxic organic pollutants remains a pressing problem of our time.

The chemical composition of cells of strains of microorganisms is necessary for their chemodifferentiation. This information can be used to determine the generic (species) belonging to a strain in ecological, biotechnological and infectious communities of microorganisms for medical diagnosis or for further use in the biotechnological direction. Of particular interest is the introduction of advances in biotechnology techniques based on the use of non-pathogenic strains of microorganisms im...

Methods for eliminating oil pollution, based on their decomposition by non-pathogenic microorganisms, are recognized as effective and ecologically safe. The degree of purification is increased in the case of the production of biosurfactants by microorganisms. The urgent task of ecobiotechnology remains the search for new oil-oxidizing microorganisms capable of producing biosurfactants on a cheap nutrient medium. The purpose of the work is to screen microorganisms isolated from the o...

Biotechnological treatment of enterprises wastewater, which contains toxic phenolic compounds, is the most acceptable method today. Therefore, the search for new non-pathogenic biochemically active microorganisms - destructors of phenol and their identification is relevant. The aim of this study was to determine phenol-oxidizing activity and the fatty acid profile of Brevibacillus centrosporus F14 – destructor of phenol, isolated from pharmaceutical plant wastewater. Fatty acids analysis ...

The article is devoted to the implementation of the mediation institution in the national criminal procedural legislation of Ukraine. In European countries, this institution is one of the effective alternative (out-of-court) methods for resolving conflicts, which is designed to quickly restore the violated rights of victims, save state resources and coercion. The author drew attention to the main shortcomings, which are obstacles for the full use of this institution at the present stage.