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Submit scientific paper, scientific publications, International Research Journal | Meždunarodnyj naučno-issledovatel’skij žurnal

ISSN 2227-6017 (ONLINE), ISSN 2303-9868 (PRINT), DOI: 10.18454/IRJ.2227-6017
ЭЛ № ФС 77 - 80772, 16+

Featured articles

A COMPARATIVE ANALYSIS OF PYRITE-BEARING VOLCANOGENIC FORMATIONS OF THE BLAKSKY ZONE AND THE EAST URAL UPLIFT

Posted in 2021, GEOLOGY AND MINERALOGY, Issue №8 (110) August 2021 | 0 comments

Currently, in Orenburg Oblast, as well as in the Urals as a whole, there is a great need for the reproduction of copper ore reserves as a result of the intensive and prolonged development of large pyrite deposits. In light of this fact, there was a need to re-evaluate the promising areas for pyrite mineralization; however, there are many insufficiently studied areas, which include the Blaksky zone. The aim of this study is to identify the features of copper-crusted mineralization of the Blaksk structural-formation block of the East Ural trough. The provided data on the localization levels and evolution of pyrite mineralization of the East Ural trough on the example of the Blaksky deposit show an increase in the content of lead and zinc in relation to copper from the lower tier to the upper, as well as laterally in the eastern direction. The data confirm this pattern in comparison with the deposits of the East Ural uplift. The same pattern is typical for the East Ural deflection. This allows the authors to consider this territory as promising for pyrite polymetallic mineralization.

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ON THE CHEMICAL PROPERTIES OF CLINOPYROXENE IN THE DIKE COMPLEXES OF THE KATSDAG-KEKHNAMEDAN ZONE IN THE EASTERN SEGMENT OF THE GREATER CAUCASUS

Posted in 2021, GEOLOGY AND MINERALOGY, Issue №8 (110) August 2021 | 0 comments

The article examines the typomorphic features of pyroxenes in rocks of the Katsdag-Kehnamedan zone dyke complexes of different ages in the Eastern segment of the Greater Caucasus based on the results of microprobe and microscopic studies. It is established that in all varieties of rocks of dyke complexes of different ages, pyroxenes are represented by augite and less often by magnesian augite, they are characterized by low titanicity and alumina content. However, it should be noted that clinopyroxenes in rocks of different age are characterized by specific features due to the thermodynamic regimes of their formation. They also reveal the complex nature of the formation of dyke complexes, which differ in the physicochemical conditions of the evolution of a mafic melt with a characteristic ore specialization.

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AN INVESTIGATION OF THE PRODUCTION OF CELLULOSE ADIPINATES FROM WOOD AND ITS SUBSEQUENT PRODUCTS

Posted in 2021, CHEMISTRY, Issue №8 (110) August 2021 | 0 comments

The market of bioplastics and dietary supplements is certainly promising and has been undergoing rapid development. In this regard, the issue of developing the technology for obtaining bioplastics by modifying cellulose and cellulose–lignin-containing waste can be considered relevant. The article examines the regularities of obtaining cellulose esters with adipic acid. In the course of the research, cellulose esters with adipic acid were obtained in the presence of thionyl chloride from wood raw materials with a degree of substitution of 2. The formation of cellulose esters was confirmed via IR spectroscopy. The synthesized cellulose adipates were later used to produce composites based on lignin and higher carboxylic acids. During high-temperature pressure treatment, the composition is chemically modified to form a thermoplastic material.

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RESEARCH OF PROCESSES OF DETERMINATION OF GOLD CONTENT IN PRODUCTS OF GOK “NEVSKY” LLC “DRUZA”

Posted in 2021, CHEMISTRY, Issue №8 (110) August 2021 | 0 comments

The article deals with the processes of determining the gold content in the products of the “Nevsky” mining and processing plant of “Druza” LLC. The activity of AAL to determine the content of gold in gold-containing products was investigated. The composition and structure of AAL GOK “Nevsky” LLC “Druza” is considered. The paper describes methods for determination of gold such as atomic absorption, titrimetric analysis and gravimetric method. The principles of internal and external laboratory control in the AAL of a gold mining company are defined.

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RESEARCH ON THE IMPLEMENTATION OF THE COMPLEX OF TANNIN AND SODIUM SULFACYL IN THE DEVELOPMENT OF A SEMISOLID DOSAGE FORM

Posted in 2021, Issue №8 (110) August 2021, PHARMACEUTICS | 0 comments

The aim of the study is to develop a semisolid dosage form, an ointment based on a complex of tannin and sodium sulfacyl for the treatment of infected wounds. Methodology. When developing the ointment, the authors used a method of diffusion into gelatin gel in “in vitro” experiments and a microbiological method for evaluating the release of physiologically active substances from ointments in direct contact with the medium by the “well” method. UV spectrophotometry was used to identify tannin and sodium sulfacyl. Qualitative determination of tannin in the ointment was carried out by permanganatometry with indigosulfonic acid, and sodium sulfacyl by nitritometry. Results. The article features biopharmaceutical research and an establishment of a rational ointment base from 10 g of T-2 emulsifier, 60 g of vaseline, 30 g of water, providing maximum release of medicine. Also, the study determines the optimal therapeutic concentrations of tannin (3 %) and sodium sulfacyl (10 %) in the dosage form. To identify tannin and sodium sulfacyl in the ointment, their UV absorption spectra were studied in the joint presence. Tannin has a maximum absorption at λ= 285 nm, sodium sulfacyl is observed to have it at λ= 256 nm. The quantitative determination of tannin and sodium sulfacyl in the ointment was also carried out. Conclusion. The developed ointment based on tannin and sulfonamide preparation sodium sulfacyl is recommended as an effective remedy for the treatment of infected wounds.

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A STUDY OF CONTAMINATION OF MEDICINAL PLANTS WITH HEAVY METALS IN TYUMEN OBLAST

Posted in 2021, Issue №8 (110) August 2021, PHARMACEUTICS | 0 comments

The study establishes that the content of heavy metals in medicinal plants depends on the ecological situation of the planting areas. In Tyumen Oblast, the issues of occurrence, accumulation and content of heavy metals in medicinal plants, as well as their transition from plant raw materials to water and alcohol extracts, are insufficiently studied. The aim of the research was to analyze the content of Pb, Cd, Zn, Cu, Mn in samples of Coltsfoot raw materials collected in places with different degrees of man-made load and comparison with raw materials harvested in the reference site; to study the ways of accumulation and distribution of heavy metals in organs within a single plant; to identify the features of the transition of heavy metals from medicinal plant raw materials to water (infusions) and alcohol (tinctures) extraction. It should be noted that the amount of heavy metal content in all Coltsfoot samples was on average 40.7% higher, and Pb was 6 times higher than in samples of raw materials harvested on the reference site, with the exception of Cd, the concentration of which was in some cases lower and averaged 29.1% of the reference site. Medicinal plants growing in habitats with increased man-made load accumulate more Zn in soils and underground organs, and in (nominally pure) underground organs and grass. The maximum Pb content accumulates in the soils of plants growing in the background area, where it does not exceed the threshold limit value, while in the territory subjected to man-made load the maximum concentration of 10.3±0.9 mg/kg is noted in yarrow weed, which exceeds the threshold limit. The average transition of Zn to water extracts amounted to 30.6%, and Cu equaled 19.6%, Zn transitioned to alcohol extracts on average 9.9%, and Cu 11.5 %, which is 21% and 8% lower than in infusions, respectively.

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ON THE OPTIMIZATION OF FISH GROWTH BY INTEGRATING TWO INDUSTRIES

Posted in 2021, AGRICULTURE, Issue №8 (110) August 2021 | 0 comments

Aquaculture, especially the cultivation of valuable fish species, is undergoing rapid development. Aquaponics, the joint cultivation of fish in swimming pools and plants, is becoming a promising and effective direction. The purpose of the research is to study the fish-breeding indicators in young sturgeon, germination, yield, and dry matter content of the green mass of parsley in the context of using the developed aquaponics system. The article presents data on the study of the influence of growing parsley greens in the pool on a vertical aquaponic installation in a fish-breeding pool. The study identifies an increase in the oxygen saturation of water in the pool by 3.5 %, an increase in the yield of green mass of parsley by 7.3 % compared with the soil mass, an increase in the weight of young sturgeon fish by 7.9 %, the fatness coefficient – by 9.6% and survival rate – by 3.0%.

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FISH NUTRITION IN AQUACULTURE

Posted in 2021, AGRICULTURE, Issue №8 (110) August 2021 | 0 comments

For many years, water quality has been the most important constraint for fish production. In recent years, significant progress has been made in life support technology, therefore nutrition is increasingly considered as a key constraint on the way to increase production efficiency, as well as the growth and reproduction of new fish species. In aquaculture, artificial nutrition balanced in all nutrients has become of paramount importance. Artificial feeding is an important practice in aquaculture, which accounts for more than 60% of total costs.

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ALGAE BIOTECHNOLOGY IN AQUACULTURE

Posted in 2021, AGRICULTURE, Issue №8 (110) August 2021 | 0 comments

Microalgae are a very diverse group of unicellular organisms consisting of protozoan eukaryotes and prokaryotic cyanobacteria or blue-green algae. Microalgae have a unique ecological status; while being almost ubiquitous in euphotic zones, they can occupy extreme habitats, ranging from tropical coral reefs to polar regions, and contribute to half of the photosynthetic activity of the globe. In addition, they form the basis of the food chain for more than 70% of the world’s biomass. Microalgae are a valuable ecological and biotechnological resource, and the purpose of this review is to study the use of in vitro technologies for the conservation and sustainable use of this remarkable group of organisms. The first part of the review assesses the importance of in vitro methods in the maintenance and preservation of microalgae and describes the central role of culture collections in applied algae research. The second part examines the application of microalgae technologies in vitro, particularly in the context of aquaculture and biotechnology. Special attention is paid to the use of economically important algae products, including feed for aquaculture, biomass production for the health sector, green fertilizers, pigments, vitamins, antioxidants and antimicrobial agents. The contribution of microalgae to environmental studies is also evaluated; for example, they play an important role as indicator organisms in environmental impact assessment. Similarly, special collection strains of microalgae are used to test ecotoxicity.

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THE MAIN FISH-FARMING INDICATORS OF STURGEON DURING HIGH-FAT CONTENT FEEDING

Posted in 2021, AGRICULTURE, Issue №8 (110) August 2021 | 0 comments

The current article features a study of the main fish-farming indicators of sturgeon, morphometric analysis, assessment of the development of internal organs, calculation of their indices, and the relationship between the clinical condition of fish. When feeding with high-fat content, the final weight of sturgeon increases by 10.0-23.9%, the fatness coefficient increases by 12.6-31.6 %, feed costs per unit of production decrease by 14.4-28.7 % of young Russko-Lensky sturgeon breed, there is an increase in liver mass indices by 13.9-17.8 %, spleen indices are increased by 13.0 %, and a decrease in intestinal mass indices by 15.4-17.1 %. It is noted that an increase in the percentage of feeding trout causes deterioration of the physiological and behavioral state of the fish.

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