Preparation and investigation of the heterogeneous systems, containing highly dispersed components

The results of the investigation of the different materials containing highly dispersed substances are reported. The following materials, in-cluding colloidal, supported and fibrous regulators of intraballistic char-acteristics of composite solid propellents; X-ray contrast neutron-capturing magnetic liquid for radiation examinations, neutron-capture therapy of malignant neoplasms and X-ray diagnostics; magnetoabrasive tools combining high magnetic, cutting and abrasive characteristics; magnetic sorbents for the purification of the waste water of the industrial enterprises; antifriction and antiwear additives to mineral oils; developers for latent fingerprint visualization on wet, greasy and adhesive surfaces; different gas-generating systems for sickness diagnostics; silver and silver/palladium powders for conducting pasters are consid-ered. The preparative peculiarities of the interphase synthesis and the properties of the nanosized metals and their compounds obtained by this method are discussed. The state (sediment, film, colloidal solution) and the phase of the reaction product's localization (organic, water or inter-face) is shown to depend on such factors as the nature, concentration and ratio of the reagents, reaction temperature, volume of the phases and in-terface area. The properties of the formed metals and their compounds are differ from one's of the corresponding substances precipitated from the homogeneous (aqueous) solutions

MOTIVATION OF EDUCATIONAL ACTIVITY OF ELEMENTARY SCHOOL CHILDREN

В данной статье представлены результаты исследования мотивации учебной деятельности младших школьников. Установлены особенности мотивации учебной деятельности младших школьников, выявлена взаимосвязь между сформированностью познавательного интереса и мотивацией учебной деятельностиThe article discusses the results of the study motivation of educational activity of elementary school children. In the course of the study, the features of motivation of educational activity of younger students were established, the relationship between the formation of cognitive interest and motivation of educational activity was reveale

Soil bacterial communities of Sahara and Gibson deserts: Physiological and taxonomical characteristics

The purpose of this research was to investigate the structure of soil bacteria communities present in the Gibson (Australia) and the Sahara (Egypt) deserts, as well as to estimate strain survivability under different environmental factors. It should be noticed that the screening of bacterial resistance to wide spectra of principally different stress conditions was performed for the first time. Experiments were conducted with culturable bacterial communities. Strains were identified using 16S rRNA sequencing, and stress-tolerance was estimated by growing strains in various nutrient media. In order to characterize the community the epifluorescent microscopy and multisubstrate testing were also performed. High bacterial abundance in the desert soils was detected, and there was seen a significant proportion of culturable cells. The close numbers of psychotropic and mesophilic bacteria in arid ecosystems were revealed. The representatives of the Actinobacteria phylum were dominant in the microbial communities, and Firmicutes, Proteobacteria, and Bacteroidetes phyla representatives were also identified. Tolerance of the axenic bacterial cultures, isolated from arid desert ecotopes, to temperature, pH, salts (KCl, NaCl, MgSO4, NaHCO3), strong oxidizers (Mg(ClO4)2), and antibiotics (ampicillin, cephalexin, chloramphenicol, tetracycline, doxycycline, kanamycin, rifampicin) was studied. The bacterial isolates were characterized by polyextremotolerance and by the ability to maintain metabolic activity in vitro while influenced by a wide range of physicochemical and biotic factors

Condition of entomophilic fauna on Hyssopus officinalis L. crops depending on ecotope conditions

Species diversity and number of potential pollinator species on H. officinalis seed crops in various ecotopes of farm fields were studied under the influence of "Bi-58 new" insecticide treatment and without preliminary treatment. The presence of 16 insect species belonging to four families of the genus Hymenoptera (Megachilida, Apidae, Halictidae and Vespidae), two families of the Diptera row (Syrphidae and Stratiomyidae) and one family of the genus Lepidoptera (Lycaenalidae) has been identified on the seed crops of H. officinalis. The insecticidal treatment in general did not significantly affect the total number of pollinators, but changed the species composition of pollinators and their number on the field area. As much as possible, the decrease in the prevalence and number of the Megachilida species was affecte

Biological resources of natural forage grassland of the cretaceous south of the European Russia

The main objective of the made researches was assessment of territorial confinedness of economic and valuable plant species and also a status and productivity of a natural forage grassland within agrolandscapes of the cretaceous South of the European Russia (the territory of the Belgorod region). Biological and vegetable resources of the natural forage grasslands of the East part of the Belgorod region in a subband of the southern forest-steppe were studie

Some ways of filling of the vascular bed of domestic animals

In this work the assessment of some methods of filling of the mammals blood channels is presented. As injection masses there were used the gelatine solution of 5%, painted with the ink by Borisevich V.B. technique and the solution consisting of Bustilat-M glue and the water in a proportion of 2:1. The conducted researches showed that the most successful, in terms of simplicity of execution, is filling of vessels with the solution consisting of Bustilat-M glue and water, as it allows with the little effort and with the smallest expenses to fill in both large and average vessel

Biofouling growth on plastic substrates: Experimental studies in the Black Sea

Despite long-term research on marine litter there is still insufficient knowledge about benthic organisms associated with these substrates, especially experimental studies and methodology of sampling for complex biofouling assemblages. To predict the fate of plastic in the marine environment it is necessary to know how long the macrolitter can stay in different sea matrices and what are the steps of colonisation by marine organisms. The experiments were carried out during various seasons in situ in the north-western Black Sea coastal area. Three new types of the experimental constructions intended for different durations of exposure (1–10 months) were designed. This article is the first to present the methodology and the results of complex experiments investigating marine fouling (from microalgae to meio- and macrofauna) on plastic surfaces. Overall, 28 genera of microalgae, 13 major groups of meiobenthos and 36 species of macrofauna were found on plastic during the experiments. The microalgae fouling was mainly formed by representatives of genus Cocconeis. The species composition of microalgae was common for the research area. The average density and biomass of meiobenthos were the greatest on I construction type after 8 months of exposure. In the total macrozoobenthos biomass and density of Bivalvia and Crustacea dominated, respectively. The obtained results on the interaction between fouling organisms and plastic materials in the marine environment form an important contribution to the understanding of the "good ecological status" of the sea. Additional studies based on the tested methodology could be used as a component of ecological monitoring during development and implementation of the approaches of the Marine Strategy (descriptor 10)

Morphological features of wild boar individuals of semifree content

The article reflects the results of the study of morphological features of wild boars of semi-free content on the basis of their comparison with the corresponding parameters of wild boar

Methods and hardware oriented algorithms for making stellarator magnetic system screw-type winding images

The base methods, algorithms and standard programming tools which using for 3D images and for visualization by projection of the toroidal stellarator magnetic system screw-type winding were represented in this article. Work of the computer program for screw-type winding images manipulation and for necessary geometry information about given object receiving was represented.В статті наведено основні методи, алгоритми та стандартні програмні засоби, що використовуються для отримання 3D-зображення та зображення по проекціям гвинтових обмоток тороїдальних магнітних систем стелараторного типу. Описано роботу комп’ютерної програми, що дозволяє маніпулювати зображенням гвинтових обмоток й отримувати необхідну інформацію про геометрію об’єкту моделювання.В статье изложены основные методы, алгоритмы и стандартные программные средства, используемые для получения 3D-изображения и изображения по проекциям винтовых обмоток тороидальных магнитных систем стеллараторного типа. Описана работа компьютерной программы, позволяющей манипулировать изображением винтовых обмоток и получать необходимую информацию о геометрии моделируемого объекта