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This paper describes a mineralogical study that looked at the copper-nickel ores of the Talnakh Ore Cluster. It also describes attempts to develop a method for predicting concentration performance on the basis of mapping data. The geological classification of the Talnakh ores developed in 1987–1992 is rather a classification of natural types and varieties as it fails to specify any particular concentration process indicators. The copper-nickel ores of the Talnakh Ore Cluster are multicomponent and it is quite difficult to develop a classification based on concentration performance that would account for the quality of concentrates and the recovery of non-ferrous and noble metals. In the period of 2015–2020, a series of experiments and a mineralogical study were conducted for 107 samples of impregnated ore, 105 samples of copper ore and 60 samples of high-grade ore under the contracts with the R&D Office of Nornickel’s Polar Division. Based on the results of the experiments, a classification was developed for impregnated, copper and high-grade ores based of one selected actual process indicator. Due to the use of a mining information system, each box of a block model representing an ore body (or, each mining unit with known characteristics) can be assigned appropriate concentration indicators. On the basis of geological mapping results, a method was applied for indirect calculation of expected concentration indicators based on a number of attributes. With the help of this method, the authors were able to determine the actual indicators, estimate the calculation error and find a way to improve the predictability of the model through analyzing additional samples and attributes.

Oxidative decomposition of difficultly biodegradable nonionic surfactants, oxyethylated phenols with various degrees of oxyethylation (Neonols AF 9-6, 9-10, 9-12), was examined. The initial rate and extent of the oxidation depend on the degree of oxyethylation, anion of the iron salt added, and temperatureye

The current legislative approaches to understanding the essence and implementation of internal control procedures by economic entities have been systematized. The approach to understanding the essence of internal control as an element of the company’s accounting system that prevails in departmental and industry regulations on accounting in the Russian Federation has been critically analyzed. The historical digression of the development of understanding of the term “internal control” has been presented and its connection with the subjects of control has been proved. The transformation of understanding of the essence of internal control, which is contained in the regulatory legal acts of the USSR and the Russian Federation, from a subjective approach to a simple process approach has been traced, in accordance with the needs of business entities. The ways of improving the legislative framework of internal control have been outlined.