[en] The synthesis of coordination compounds of Cu(II) and Zn(II) succinates with mono methylolurea has been studied in this article, and their IR spectra and SDS have been studied as well. The thermal characteristics of the formed coordination compounds were determined and their thermal stability was established. (author)

[en] In this paper, the synthesis of the corrosion inhibitor IKPK-1, based on p-phenylenediamine and crotonaldehyde, was studied. When the initial feed was taken in a ratio of 1:2, it yielded higher outputs compared to other ratios. The IR spectra of the obtained corrosion inhibitor were also analyzed. (author)

[en] This article presents the results of a study on the activity of natural radionuclides in the soils of the southern part of the Kurama Range. It was found that the activity of radionuclides in the soil is related to the landscapes of the area and the migration of elements from them. (author)

[en] This work is dedicated to studying the kinetics of the sintering process of Turpi Deposit nepheline syenites with magnesium chloride. (author)

[en] The simplest method is the synthesis of isomeric thiadiazine on the basis of oxy ketones, which are hydration products of acetylene alcohols and easily react with bifunctional reagents. A modification of this method is the bromination of oxy ketones. The α-bromo derivatives obtained in this way radically change the direction of the reaction, opening the way to obtain compounds of the 1.3.4-thiadiazine series. In continuation of researches directed on search of ways of synthesis of new representatives of a class of thiadiazine and thus expansion of the data bank concerning biological activity and stereochemistry of the given class of compounds for construction of dependence in a row 'Structure - activity'. (author)

[en] Organic clusters, which are part of coal, allow under certain conditions to obtain from coal such valuable products as chemical reagents, intermediates for the chemical industry, stimulators of growth and development of agricultural crops such as humic acids. (author)

[en] Solving the problems of economical and rational use of oil products is important at the current stage of the global oil crisis. This issue acquires special urgency against the backdrop of rising oil product prices and the deteriorating ecological state of the environment associated with the use of oil-based fuels and lubricants. In this regard, the development of technological schemes for the regeneration and recycling of used lubricants is of scientific and practical interest. This is especially important for countries that do not produce oil products, such as Tajikistan. (author)

[en] The aim of this work is to synthesize water-absorbing hydrogels based on acrylamide polymerization, to study the effect of crosslinking agent concentration on the degree of hydrogel swelling. According to the results of the study, it can be concluded that the swelling of the gel decreases with increasing concentration of crosslinking agent. (author)

[en] Heavy metal compounds and their increased concentration in the environment are carcinogenic, mutagenic, some of them can cause neurological and behavioral changes. Combating elevated levels of heavy metals in the aquatic environment is particularly serious. (author)

[en] For the first time, glass-ceramic materials have been obtained based on ternary systems containing Ce₂O₃, Nd₂O₃, and Er₂O₃, with the additional introduction of WO₃. These materials exhibit higher physical and technical properties compared to the original glass. (author)