Evaluating the effectiveness of companies using the DEA method

The paper assesses the effectiveness of Russian oil and gas companies. It is hypothesized that the DEA method for evaluating the effectiveness of companies gives the most accurate results compared to the method based on profitability coefficients and allows you to determine the individual and industry-wide effectiveness of companie

The impact of the publication of non-financial statements on the financial performance of companies with the identification of interpectoral features

The purpose of this article is to study the impact of the publication of non-financial statements on the financial performance of Russian companies with the identification of intersectoral feature

Thiorhodospira sibirica gen. nov., and sp. nov., a new alkaliphilic purple sulfur bacterium from a Siberian soda lake

A new purple sulfur bacterium was isolated from microbial films on decaying plant mass in the near-shore area of the soda lake Malyi Kasytui (pH 9.5, 0.2% salinity) located in the steppe of the Chita region of south-east Siberia. Single cells were vibrioid- or spiral-shaped (3-4 microns wide and 7-20 microns long) and motile by means of a polar tuft of flagella. Internal photosynthetic membranes were of the lamellar type. Lamellae almost filled the whole cell, forming strands and coils. Photosynthetic pigments were bacteriochlorophyll a and carotenoids of the spirilloxanthin group. The new bacterium was strictly anaerobic. Under anoxic conditions, hydrogen sulfide and elemental sulfur were used as photosynthetic electron donors. During growth on sulfide, sulfur globules were formed as intermediate oxidation products. They were deposited outside the cytoplasm of the cells, in the peripheral periplasmic space and extracellularly. Thiosulfate was not used. Carbon dioxide, acetate, pyruvate, propionate, succinate, fumarate and malate were utilized as carbon sources. Optimum growth rates were obtained at pH 9.0 and optimum temperature was 30 degrees C. Good growth was observed in a mineral salts medium containing 5 g sodium bicarbonate l-1 without sodium chloride. The new bacterium tolerated up to 60 g sodium chloride l-1 and up to 80 g sodium carbonates l-1. Growth factors were not required. The DNA G + C composition was 56.0-57.4 mol%. Based on physiological, biochemical and genetic characteristics, the newly isolated bacterium is recognized as a new species of a new genus with the proposed name Thiorhodospira sibirica

Rating of stability of Russian companies in oil and gas and electric power industries based on interval volatility

The authors propose an instrumental apparatus for calculating the ratings of Russian companies in the oil and gas and electric power industries based on a weighting method, risk assessment using the minimax criterion and an intellectual tree structur

Fuzzy-Logical model for analysis of sustainable development of fuel and energy complex enterprises

The purpose of this article is to build a mathematical model for analyzing the sustainability of the development of an enterprise in the fuel and energy complex, integrated into an information management syste

INTRODUCTION OF THE LATEST DIGITAL TECHNOLOGIES IN THE BANKING SECTOR: FOREIGN EXPERIENCE AND RUSSIAN PRACTICE

Purpose: The article is devoted to topical issues of strategic development of commercial banks in the context of digitalization of the economy, requiring the introduction of new financial technologies in the financial and credit sphere. The paper describes a number of new digital technologies based on artificial intelligence; open API, biometric identification system, Big Data, Blockchain, cloud technologies, as well as how these technologies are used in the Bank's work with customers. Methodology: The study of the chosen topic is based on the methods of generalization and comparison, analysis and synthesis, the method of groupings, as well as models of banking management used in practice by modern domestic and foreign banks. Result: The article analyzes the experience of foreign countries in the use of these technologies in the banking sector and substantiates the need for an early transition of the Russian banking sector to a more innovative model of functioning. In conclusion, the paper identifies opportunities and ways for the further development of digital technologies in the banking sector. Applications: This research can be used for universities, teachers, and students. Novelty/Originality: In this research, the model of Introduction of the Latest Digital Technologies in the Banking Sector: Foreign Experience and Russian Practice is presented in a comprehensive and complete manner

Special features of corporate budget planning: Contemporary approach

The purpose of this article was to study budgeting process from the point of its structure, analyze the Russian and European models of budget plannin

Taxonomic analysis of a group of strains of bacteriochlorophyll b-containing purple bacteria of the genus Blastochloris

The phylogenetic and phenotypic structure of a group of bacteriochlorophyll b-containing purple bacteria of the genus Blastochloris was studied to determine the taxonomic status of these bacteria. The group included the type strains of B. viridis and B. sulfoviridis and eight Blastochloris strains isolated from different water bodies. By DNA-DNA hybridization carried out by the optical method, three phylogenetic clusters were identified within the group studied the corresponded to three genospecies related at a DNA homology level of 30-50%. Two of these genospecies were represented by the type strains of B. viridis and B. sulfoviridis and by three new isolates each; the third genospecies included two new isolates, KR-70sv and KR-101sv. Comparative analysis of the fatty acid composition of four strains gave the same clusters as those yielded by DNA hybridization. Morphological and physiological investigation confirmed that strains phylogenetically close to B. viridis and B. sulfoviridis indeed belonged to these species. However, strains KR-70sv and KR-101sv, constituting a separate genospecies, showed no significant phenotypic distinctions from B. sulfoviridis and were assigned to this species. Thus, out of eight new isolates, three were referred to B. viridis and five to B. sulfoviridis. The latter strains are phenotypically similar but phylogenetically divergent